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Merge tag 'pci-v3.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...
[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
5424f32e 35static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 36{
5424f32e 37 struct nlattr *rt = attrs[type];
1da177e4
LT		 38 struct xfrm_algo *algp;
39
40 if (!rt)
41 return 0;
42
5424f32e 43 algp = nla_data(rt);
0f99be0d 44 if (nla_len(rt) < xfrm_alg_len(algp))
31c26852
HX		 45 return -EINVAL;
46
1da177e4
LT		 47 switch (type) {
48 case XFRMA_ALG_AUTH:
1da177e4 49 case XFRMA_ALG_CRYPT:
1da177e4 50 case XFRMA_ALG_COMP:
1da177e4
LT		 51 break;
52
53 default:
54 return -EINVAL;
3ff50b79 55 }
1da177e4
LT		 56
57 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
58 return 0;
59}
60
4447bb33
MW		 61static int verify_auth_trunc(struct nlattr **attrs)
62{
63 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
64 struct xfrm_algo_auth *algp;
65
66 if (!rt)
67 return 0;
68
69 algp = nla_data(rt);
70 if (nla_len(rt) < xfrm_alg_auth_len(algp))
71 return -EINVAL;
72
73 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
74 return 0;
75}
76
1a6509d9
HX		 77static int verify_aead(struct nlattr **attrs)
78{
79 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
80 struct xfrm_algo_aead *algp;
81
82 if (!rt)
83 return 0;
84
85 algp = nla_data(rt);
86 if (nla_len(rt) < aead_len(algp))
87 return -EINVAL;
88
89 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
90 return 0;
91}
92
5424f32e 93static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 94 xfrm_address_t **addrp)
95{
5424f32e 96 struct nlattr *rt = attrs[type];
eb2971b6 97
cf5cb79f 98 if (rt && addrp)
5424f32e 99 *addrp = nla_data(rt);
eb2971b6 100}
df71837d 101
5424f32e 102static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 103{
5424f32e 104 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 105 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 106
107 if (!rt)
108 return 0;
109
5424f32e 110 uctx = nla_data(rt);
cf5cb79f 111 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 112 return -EINVAL;
113
114 return 0;
115}
116
d8647b79
SK		 117static inline int verify_replay(struct xfrm_usersa_info *p,
118 struct nlattr **attrs)
119{
120 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
ecd79187 121 struct xfrm_replay_state_esn *rs;
d8647b79 122
ecd79187
MK		 123 if (p->flags & XFRM_STATE_ESN) {
124 if (!rt)
125 return -EINVAL;
126
127 rs = nla_data(rt);
128
129 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
130 return -EINVAL;
131
132 if (nla_len(rt) < xfrm_replay_state_esn_len(rs) &&
133 nla_len(rt) != sizeof(*rs))
134 return -EINVAL;
135 }
7833aa05 136
d8647b79
SK		 137 if (!rt)
138 return 0;
139
02aadf72
SK		 140 if (p->id.proto != IPPROTO_ESP)
141 return -EINVAL;
142
d8647b79
SK		 143 if (p->replay_window != 0)
144 return -EINVAL;
145
146 return 0;
147}
df71837d 148
1da177e4 149static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 150 struct nlattr **attrs)
1da177e4
LT		 151{
152 int err;
153
154 err = -EINVAL;
155 switch (p->family) {
156 case AF_INET:
157 break;
158
159 case AF_INET6:
dfd56b8b 160#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 161 break;
162#else
163 err = -EAFNOSUPPORT;
164 goto out;
165#endif
166
167 default:
168 goto out;
3ff50b79 169 }
1da177e4
LT		 170
171 err = -EINVAL;
172 switch (p->id.proto) {
173 case IPPROTO_AH:
4447bb33
MW		 174 if ((!attrs[XFRMA_ALG_AUTH] &&
175 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 176 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 177 attrs[XFRMA_ALG_CRYPT] ||
35d2856b 178 attrs[XFRMA_ALG_COMP] ||
ea9884b3
FD		 179 attrs[XFRMA_TFCPAD] ||
180 (ntohl(p->id.spi) >= 0x10000))
181
1da177e4
LT		 182 goto out;
183 break;
184
185 case IPPROTO_ESP:
1a6509d9
HX		 186 if (attrs[XFRMA_ALG_COMP])
187 goto out;
188 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 189 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 190 !attrs[XFRMA_ALG_CRYPT] &&
191 !attrs[XFRMA_ALG_AEAD])
192 goto out;
193 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 194 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 195 attrs[XFRMA_ALG_CRYPT]) &&
196 attrs[XFRMA_ALG_AEAD])
1da177e4 197 goto out;
35d2856b
MW		 198 if (attrs[XFRMA_TFCPAD] &&
199 p->mode != XFRM_MODE_TUNNEL)
200 goto out;
1da177e4
LT		 201 break;
202
203 case IPPROTO_COMP:
35a7aa08 204 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 205 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 206 attrs[XFRMA_ALG_AUTH] ||
4447bb33 207 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b
MW		 208 attrs[XFRMA_ALG_CRYPT] ||
209 attrs[XFRMA_TFCPAD])
1da177e4
LT		 210 goto out;
211 break;
212
dfd56b8b 213#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 214 case IPPROTO_DSTOPTS:
215 case IPPROTO_ROUTING:
35a7aa08
TG		 216 if (attrs[XFRMA_ALG_COMP] ||
217 attrs[XFRMA_ALG_AUTH] ||
4447bb33 218 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 219 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 220 attrs[XFRMA_ALG_CRYPT] ||
221 attrs[XFRMA_ENCAP] ||
222 attrs[XFRMA_SEC_CTX] ||
35d2856b 223 attrs[XFRMA_TFCPAD] ||
35a7aa08 224 !attrs[XFRMA_COADDR])
e23c7194
MN		 225 goto out;
226 break;
227#endif
228
1da177e4
LT		 229 default:
230 goto out;
3ff50b79 231 }
1da177e4 232
1a6509d9
HX		 233 if ((err = verify_aead(attrs)))
234 goto out;
4447bb33
MW		 235 if ((err = verify_auth_trunc(attrs)))
236 goto out;
35a7aa08 237 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 238 goto out;
35a7aa08 239 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 240 goto out;
35a7aa08 241 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 242 goto out;
35a7aa08 243 if ((err = verify_sec_ctx_len(attrs)))
df71837d 244 goto out;
d8647b79
SK		 245 if ((err = verify_replay(p, attrs)))
246 goto out;
1da177e4
LT		 247
248 err = -EINVAL;
249 switch (p->mode) {
7e49e6de
MN		 250 case XFRM_MODE_TRANSPORT:
251 case XFRM_MODE_TUNNEL:
060f02a3 252 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 253 case XFRM_MODE_BEET:
1da177e4
LT		 254 break;
255
256 default:
257 goto out;
3ff50b79 258 }
1da177e4
LT		 259
260 err = 0;
261
262out:
263 return err;
264}
265
266static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 267 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 268 struct nlattr *rta)
1da177e4 269{
1da177e4
LT		 270 struct xfrm_algo *p, *ualg;
271 struct xfrm_algo_desc *algo;
272
273 if (!rta)
274 return 0;
275
5424f32e 276 ualg = nla_data(rta);
1da177e4
LT		 277
278 algo = get_byname(ualg->alg_name, 1);
279 if (!algo)
280 return -ENOSYS;
281 *props = algo->desc.sadb_alg_id;
282
0f99be0d 283 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 284 if (!p)
285 return -ENOMEM;
286
04ff1260 287 strcpy(p->alg_name, algo->name);
1da177e4
LT		 288 *algpp = p;
289 return 0;
290}
291
4447bb33
MW		 292static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
293 struct nlattr *rta)
294{
295 struct xfrm_algo *ualg;
296 struct xfrm_algo_auth *p;
297 struct xfrm_algo_desc *algo;
298
299 if (!rta)
300 return 0;
301
302 ualg = nla_data(rta);
303
304 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
305 if (!algo)
306 return -ENOSYS;
307 *props = algo->desc.sadb_alg_id;
308
309 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
310 if (!p)
311 return -ENOMEM;
312
313 strcpy(p->alg_name, algo->name);
314 p->alg_key_len = ualg->alg_key_len;
315 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
316 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
317
318 *algpp = p;
319 return 0;
320}
321
322static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
323 struct nlattr *rta)
324{
325 struct xfrm_algo_auth *p, *ualg;
326 struct xfrm_algo_desc *algo;
327
328 if (!rta)
329 return 0;
330
331 ualg = nla_data(rta);
332
333 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
334 if (!algo)
335 return -ENOSYS;
fa6dd8a2
ND		 336 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
337 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 338 return -EINVAL;
339 *props = algo->desc.sadb_alg_id;
340
341 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
342 if (!p)
343 return -ENOMEM;
344
345 strcpy(p->alg_name, algo->name);
346 if (!p->alg_trunc_len)
347 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
348
349 *algpp = p;
350 return 0;
351}
352
1a6509d9
HX		 353static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
354 struct nlattr *rta)
355{
356 struct xfrm_algo_aead *p, *ualg;
357 struct xfrm_algo_desc *algo;
358
359 if (!rta)
360 return 0;
361
362 ualg = nla_data(rta);
363
364 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
365 if (!algo)
366 return -ENOSYS;
367 *props = algo->desc.sadb_alg_id;
368
369 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
370 if (!p)
371 return -ENOMEM;
372
373 strcpy(p->alg_name, algo->name);
374 *algpp = p;
375 return 0;
376}
377
e2b19125
SK		 378static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
379 struct nlattr *rp)
380{
381 struct xfrm_replay_state_esn *up;
ecd79187 382 int ulen;
e2b19125
SK		 383
384 if (!replay_esn || !rp)
385 return 0;
386
387 up = nla_data(rp);
ecd79187 388 ulen = xfrm_replay_state_esn_len(up);
e2b19125 389
ecd79187 390 if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
e2b19125
SK		 391 return -EINVAL;
392
393 return 0;
394}
395
d8647b79
SK		 396static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
397 struct xfrm_replay_state_esn **preplay_esn,
398 struct nlattr *rta)
399{
400 struct xfrm_replay_state_esn *p, *pp, *up;
ecd79187 401 int klen, ulen;
d8647b79
SK		 402
403 if (!rta)
404 return 0;
405
406 up = nla_data(rta);
ecd79187
MK		 407 klen = xfrm_replay_state_esn_len(up);
408 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
d8647b79 409
ecd79187 410 p = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 411 if (!p)
412 return -ENOMEM;
413
ecd79187 414 pp = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 415 if (!pp) {
416 kfree(p);
417 return -ENOMEM;
418 }
419
ecd79187
MK		 420 memcpy(p, up, ulen);
421 memcpy(pp, up, ulen);
422
d8647b79
SK		 423 *replay_esn = p;
424 *preplay_esn = pp;
425
426 return 0;
427}
428
661697f7 429static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 430{
df71837d
TJ		 431 int len = 0;
432
433 if (xfrm_ctx) {
434 len += sizeof(struct xfrm_user_sec_ctx);
435 len += xfrm_ctx->ctx_len;
436 }
437 return len;
438}
439
1da177e4
LT		 440static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
441{
442 memcpy(&x->id, &p->id, sizeof(x->id));
443 memcpy(&x->sel, &p->sel, sizeof(x->sel));
444 memcpy(&x->lft, &p->lft, sizeof(x->lft));
445 x->props.mode = p->mode;
33fce60d
FD		 446 x->props.replay_window = min_t(unsigned int, p->replay_window,
447 sizeof(x->replay.bitmap) * 8);
1da177e4
LT		 448 x->props.reqid = p->reqid;
449 x->props.family = p->family;
54489c14 450 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 451 x->props.flags = p->flags;
196b0036 452
ccf9b3b8 453 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 454 x->sel.family = p->family;
1da177e4
LT		 455}
456
d51d081d
JHS		 457/*
458 * someday when pfkey also has support, we could have the code
459 * somehow made shareable and move it to xfrm_state.c - JHS
460 *
461*/
e3ac104d
MK		 462static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
463 int update_esn)
d51d081d 464{
5424f32e 465 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
e3ac104d 466 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
5424f32e
TG		 467 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
468 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
469 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 470
d8647b79
SK		 471 if (re) {
472 struct xfrm_replay_state_esn *replay_esn;
473 replay_esn = nla_data(re);
474 memcpy(x->replay_esn, replay_esn,
475 xfrm_replay_state_esn_len(replay_esn));
476 memcpy(x->preplay_esn, replay_esn,
477 xfrm_replay_state_esn_len(replay_esn));
478 }
479
d51d081d
JHS		 480 if (rp) {
481 struct xfrm_replay_state *replay;
5424f32e 482 replay = nla_data(rp);
d51d081d
JHS		 483 memcpy(&x->replay, replay, sizeof(*replay));
484 memcpy(&x->preplay, replay, sizeof(*replay));
485 }
486
487 if (lt) {
488 struct xfrm_lifetime_cur *ltime;
5424f32e 489 ltime = nla_data(lt);
d51d081d
JHS		 490 x->curlft.bytes = ltime->bytes;
491 x->curlft.packets = ltime->packets;
492 x->curlft.add_time = ltime->add_time;
493 x->curlft.use_time = ltime->use_time;
494 }
495
cf5cb79f 496 if (et)
5424f32e 497 x->replay_maxage = nla_get_u32(et);
d51d081d 498
cf5cb79f 499 if (rt)
5424f32e 500 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 501}
502
fc34acd3
AD		 503static struct xfrm_state *xfrm_state_construct(struct net *net,
504 struct xfrm_usersa_info *p,
5424f32e 505 struct nlattr **attrs,
1da177e4
LT		 506 int *errp)
507{
fc34acd3 508 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 509 int err = -ENOMEM;
510
511 if (!x)
512 goto error_no_put;
513
514 copy_from_user_state(x, p);
515
a947b0a9
ND		 516 if (attrs[XFRMA_SA_EXTRA_FLAGS])
517 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
518
1a6509d9
HX		 519 if ((err = attach_aead(&x->aead, &x->props.ealgo,
520 attrs[XFRMA_ALG_AEAD])))
521 goto error;
4447bb33
MW		 522 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
523 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 524 goto error;
4447bb33
MW		 525 if (!x->props.aalgo) {
526 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
527 attrs[XFRMA_ALG_AUTH])))
528 goto error;
529 }
1da177e4
LT		 530 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
531 xfrm_ealg_get_byname,
35a7aa08 532 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 533 goto error;
534 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
535 xfrm_calg_get_byname,
35a7aa08 536 attrs[XFRMA_ALG_COMP])))
1da177e4 537 goto error;
fd21150a
TG		 538
539 if (attrs[XFRMA_ENCAP]) {
540 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
541 sizeof(*x->encap), GFP_KERNEL);
542 if (x->encap == NULL)
543 goto error;
544 }
545
35d2856b
MW		 546 if (attrs[XFRMA_TFCPAD])
547 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
548
fd21150a
TG		 549 if (attrs[XFRMA_COADDR]) {
550 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
551 sizeof(*x->coaddr), GFP_KERNEL);
552 if (x->coaddr == NULL)
553 goto error;
554 }
555
6f26b61e
JHS		 556 xfrm_mark_get(attrs, &x->mark);
557
a454f0cc 558 err = __xfrm_init_state(x, false);
1da177e4
LT		 559 if (err)
560 goto error;
561
fd21150a
TG		 562 if (attrs[XFRMA_SEC_CTX] &&
563 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 564 goto error;
565
d8647b79
SK		 566 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
567 attrs[XFRMA_REPLAY_ESN_VAL])))
568 goto error;
569
1da177e4 570 x->km.seq = p->seq;
b27aeadb 571 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 572 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 573 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 574
9fdc4883
SK		 575 if ((err = xfrm_init_replay(x)))
576 goto error;
d51d081d 577
9fdc4883 578 /* override default values from above */
e3ac104d 579 xfrm_update_ae_params(x, attrs, 0);
1da177e4
LT		 580
581 return x;
582
583error:
584 x->km.state = XFRM_STATE_DEAD;
585 xfrm_state_put(x);
586error_no_put:
587 *errp = err;
588 return NULL;
589}
590
22e70050 591static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 592 struct nlattr **attrs)
1da177e4 593{
fc34acd3 594 struct net *net = sock_net(skb->sk);
7b67c857 595 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 596 struct xfrm_state *x;
597 int err;
26b15dad 598 struct km_event c;
e1760bd5 599 kuid_t loginuid = audit_get_loginuid(current);
4440e854 600 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed 601 u32 sid;
1da177e4 602
35a7aa08 603 err = verify_newsa_info(p, attrs);
1da177e4
LT		 604 if (err)
605 return err;
606
fc34acd3 607 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 608 if (!x)
609 return err;
610
26b15dad 611 xfrm_state_hold(x);
1da177e4
LT		 612 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
613 err = xfrm_state_add(x);
614 else
615 err = xfrm_state_update(x);
616
c53fa1ed 617 security_task_getsecid(current, &sid);
2532386f 618 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 619
1da177e4
LT		 620 if (err < 0) {
621 x->km.state = XFRM_STATE_DEAD;
21380b81 622 __xfrm_state_put(x);
7d6dfe1f 623 goto out;
1da177e4
LT		 624 }
625
26b15dad 626 c.seq = nlh->nlmsg_seq;
15e47304 627 c.portid = nlh->nlmsg_pid;
f60f6b8f 628 c.event = nlh->nlmsg_type;
26b15dad
JHS		 629
630 km_state_notify(x, &c);
7d6dfe1f 631out:
26b15dad 632 xfrm_state_put(x);
1da177e4
LT		 633 return err;
634}
635
fc34acd3
AD		 636static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
637 struct xfrm_usersa_id *p,
5424f32e 638 struct nlattr **attrs,
eb2971b6
MN		 639 int *errp)
640{
641 struct xfrm_state *x = NULL;
6f26b61e 642 struct xfrm_mark m;
eb2971b6 643 int err;
6f26b61e 644 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 645
646 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
647 err = -ESRCH;
6f26b61e 648 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 649 } else {
650 xfrm_address_t *saddr = NULL;
651
35a7aa08 652 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 653 if (!saddr) {
654 err = -EINVAL;
655 goto out;
656 }
657
9abbffee 658 err = -ESRCH;
6f26b61e
JHS		 659 x = xfrm_state_lookup_byaddr(net, mark,
660 &p->daddr, saddr,
221df1ed 661 p->proto, p->family);
eb2971b6
MN		 662 }
663
664 out:
665 if (!x && errp)
666 *errp = err;
667 return x;
668}
669
22e70050 670static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 671 struct nlattr **attrs)
1da177e4 672{
fc34acd3 673 struct net *net = sock_net(skb->sk);
1da177e4 674 struct xfrm_state *x;
eb2971b6 675 int err = -ESRCH;
26b15dad 676 struct km_event c;
7b67c857 677 struct xfrm_usersa_id *p = nlmsg_data(nlh);
e1760bd5 678 kuid_t loginuid = audit_get_loginuid(current);
4440e854 679 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed 680 u32 sid;
1da177e4 681
fc34acd3 682 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 683 if (x == NULL)
eb2971b6 684 return err;
1da177e4 685
6f68dc37 686 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 687 goto out;
688
1da177e4 689 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 690 err = -EPERM;
691 goto out;
1da177e4
LT		 692 }
693
26b15dad 694 err = xfrm_state_delete(x);
161a09e7 695
c8c05a8e
CZ		 696 if (err < 0)
697 goto out;
26b15dad
JHS		 698
699 c.seq = nlh->nlmsg_seq;
15e47304 700 c.portid = nlh->nlmsg_pid;
f60f6b8f 701 c.event = nlh->nlmsg_type;
26b15dad 702 km_state_notify(x, &c);
1da177e4 703
c8c05a8e 704out:
c53fa1ed 705 security_task_getsecid(current, &sid);
2532386f 706 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
c8c05a8e 707 xfrm_state_put(x);
26b15dad 708 return err;
1da177e4
LT		 709}
710
711static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
712{
f778a636 713 memset(p, 0, sizeof(*p));
1da177e4
LT		 714 memcpy(&p->id, &x->id, sizeof(p->id));
715 memcpy(&p->sel, &x->sel, sizeof(p->sel));
716 memcpy(&p->lft, &x->lft, sizeof(p->lft));
717 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
718 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 719 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 720 p->mode = x->props.mode;
721 p->replay_window = x->props.replay_window;
722 p->reqid = x->props.reqid;
723 p->family = x->props.family;
724 p->flags = x->props.flags;
725 p->seq = x->km.seq;
726}
727
728struct xfrm_dump_info {
729 struct sk_buff *in_skb;
730 struct sk_buff *out_skb;
731 u32 nlmsg_seq;
732 u16 nlmsg_flags;
1da177e4
LT		 733};
734
c0144bea
TG		 735static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
736{
c0144bea
TG		 737 struct xfrm_user_sec_ctx *uctx;
738 struct nlattr *attr;
68325d3b 739 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 740
741 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
742 if (attr == NULL)
743 return -EMSGSIZE;
744
745 uctx = nla_data(attr);
746 uctx->exttype = XFRMA_SEC_CTX;
747 uctx->len = ctx_size;
748 uctx->ctx_doi = s->ctx_doi;
749 uctx->ctx_alg = s->ctx_alg;
750 uctx->ctx_len = s->ctx_len;
751 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
752
753 return 0;
754}
755
4447bb33
MW		 756static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
757{
758 struct xfrm_algo *algo;
759 struct nlattr *nla;
760
761 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
762 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
763 if (!nla)
764 return -EMSGSIZE;
765
766 algo = nla_data(nla);
4c87308b 767 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
4447bb33
MW		 768 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
769 algo->alg_key_len = auth->alg_key_len;
770
771 return 0;
772}
773
68325d3b
HX		 774/* Don't change this without updating xfrm_sa_len! */
775static int copy_to_user_state_extra(struct xfrm_state *x,
776 struct xfrm_usersa_info *p,
777 struct sk_buff *skb)
1da177e4 778{
1d1e34dd 779 int ret = 0;
d0fde795 780
1d1e34dd 781 copy_to_user_state(x, p);
68325d3b 782
a947b0a9
ND		 783 if (x->props.extra_flags) {
784 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
785 x->props.extra_flags);
786 if (ret)
787 goto out;
788 }
789
1d1e34dd
DM		 790 if (x->coaddr) {
791 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
792 if (ret)
793 goto out;
794 }
795 if (x->lastused) {
796 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
797 if (ret)
798 goto out;
799 }
800 if (x->aead) {
801 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
802 if (ret)
803 goto out;
804 }
805 if (x->aalg) {
806 ret = copy_to_user_auth(x->aalg, skb);
807 if (!ret)
808 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
809 xfrm_alg_auth_len(x->aalg), x->aalg);
810 if (ret)
811 goto out;
812 }
813 if (x->ealg) {
814 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
815 if (ret)
816 goto out;
817 }
818 if (x->calg) {
819 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
820 if (ret)
821 goto out;
822 }
823 if (x->encap) {
824 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
825 if (ret)
826 goto out;
827 }
828 if (x->tfcpad) {
829 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
830 if (ret)
831 goto out;
832 }
833 ret = xfrm_mark_put(skb, &x->mark);
834 if (ret)
835 goto out;
836 if (x->replay_esn) {
837 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
838 xfrm_replay_state_esn_len(x->replay_esn),
839 x->replay_esn);
840 if (ret)
841 goto out;
842 }
843 if (x->security)
844 ret = copy_sec_ctx(x->security, skb);
845out:
846 return ret;
68325d3b
HX		 847}
848
849static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
850{
851 struct xfrm_dump_info *sp = ptr;
852 struct sk_buff *in_skb = sp->in_skb;
853 struct sk_buff *skb = sp->out_skb;
854 struct xfrm_usersa_info *p;
855 struct nlmsghdr *nlh;
856 int err;
857
15e47304 858 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 859 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
860 if (nlh == NULL)
861 return -EMSGSIZE;
862
863 p = nlmsg_data(nlh);
864
865 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 866 if (err) {
867 nlmsg_cancel(skb, nlh);
868 return err;
869 }
9825069d 870 nlmsg_end(skb, nlh);
1da177e4 871 return 0;
1da177e4
LT		 872}
873
4c563f76
TT		 874static int xfrm_dump_sa_done(struct netlink_callback *cb)
875{
876 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 877 struct sock *sk = cb->skb->sk;
878 struct net *net = sock_net(sk);
879
880 xfrm_state_walk_done(walk, net);
4c563f76
TT		 881 return 0;
882}
883
1da177e4
LT		 884static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
885{
fc34acd3 886 struct net *net = sock_net(skb->sk);
4c563f76 887 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 888 struct xfrm_dump_info info;
889
4c563f76
TT		 890 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
891 sizeof(cb->args) - sizeof(cb->args[0]));
892
1da177e4
LT		 893 info.in_skb = cb->skb;
894 info.out_skb = skb;
895 info.nlmsg_seq = cb->nlh->nlmsg_seq;
896 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 897
898 if (!cb->args[0]) {
899 cb->args[0] = 1;
900 xfrm_state_walk_init(walk, 0);
901 }
902
fc34acd3 903 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 904
905 return skb->len;
906}
907
908static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
909 struct xfrm_state *x, u32 seq)
910{
911 struct xfrm_dump_info info;
912 struct sk_buff *skb;
864745d2 913 int err;
1da177e4 914
7deb2264 915 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 916 if (!skb)
917 return ERR_PTR(-ENOMEM);
918
1da177e4
LT		 919 info.in_skb = in_skb;
920 info.out_skb = skb;
921 info.nlmsg_seq = seq;
922 info.nlmsg_flags = 0;
1da177e4 923
864745d2
MK		 924 err = dump_one_state(x, 0, &info);
925 if (err) {
1da177e4 926 kfree_skb(skb);
864745d2 927 return ERR_PTR(err);
1da177e4
LT		 928 }
929
930 return skb;
931}
932
7deb2264
TG		 933static inline size_t xfrm_spdinfo_msgsize(void)
934{
935 return NLMSG_ALIGN(4)
936 + nla_total_size(sizeof(struct xfrmu_spdinfo))
937 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
938}
939
e071041b 940static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 941 u32 portid, u32 seq, u32 flags)
ecfd6b18 942{
5a6d3416
JHS		 943 struct xfrmk_spdinfo si;
944 struct xfrmu_spdinfo spc;
945 struct xfrmu_spdhinfo sph;
ecfd6b18 946 struct nlmsghdr *nlh;
1d1e34dd 947 int err;
ecfd6b18
JHS		 948 u32 *f;
949
15e47304 950 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 951 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 952 return -EMSGSIZE;
953
954 f = nlmsg_data(nlh);
955 *f = flags;
e071041b 956 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 957 spc.incnt = si.incnt;
958 spc.outcnt = si.outcnt;
959 spc.fwdcnt = si.fwdcnt;
960 spc.inscnt = si.inscnt;
961 spc.outscnt = si.outscnt;
962 spc.fwdscnt = si.fwdscnt;
963 sph.spdhcnt = si.spdhcnt;
964 sph.spdhmcnt = si.spdhmcnt;
965
1d1e34dd
DM		 966 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
967 if (!err)
968 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
969 if (err) {
970 nlmsg_cancel(skb, nlh);
971 return err;
972 }
ecfd6b18
JHS		 973
974 return nlmsg_end(skb, nlh);
ecfd6b18
JHS		 975}
976
977static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 978 struct nlattr **attrs)
ecfd6b18 979{
a6483b79 980 struct net *net = sock_net(skb->sk);
ecfd6b18 981 struct sk_buff *r_skb;
7b67c857 982 u32 *flags = nlmsg_data(nlh);
15e47304 983 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 984 u32 seq = nlh->nlmsg_seq;
ecfd6b18 985
7deb2264 986 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 987 if (r_skb == NULL)
988 return -ENOMEM;
989
15e47304 990 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
ecfd6b18
JHS		 991 BUG();
992
15e47304 993 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 994}
995
7deb2264
TG		 996static inline size_t xfrm_sadinfo_msgsize(void)
997{
998 return NLMSG_ALIGN(4)
999 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1000 + nla_total_size(4); /* XFRMA_SAD_CNT */
1001}
1002
e071041b 1003static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1004 u32 portid, u32 seq, u32 flags)
28d8909b 1005{
af11e316
JHS		 1006 struct xfrmk_sadinfo si;
1007 struct xfrmu_sadhinfo sh;
28d8909b 1008 struct nlmsghdr *nlh;
1d1e34dd 1009 int err;
28d8909b
JHS		 1010 u32 *f;
1011
15e47304 1012 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1013 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1014 return -EMSGSIZE;
1015
1016 f = nlmsg_data(nlh);
1017 *f = flags;
e071041b 1018 xfrm_sad_getinfo(net, &si);
28d8909b 1019
af11e316
JHS		 1020 sh.sadhmcnt = si.sadhmcnt;
1021 sh.sadhcnt = si.sadhcnt;
1022
1d1e34dd
DM		 1023 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1024 if (!err)
1025 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1026 if (err) {
1027 nlmsg_cancel(skb, nlh);
1028 return err;
1029 }
28d8909b
JHS		 1030
1031 return nlmsg_end(skb, nlh);
28d8909b
JHS		 1032}
1033
1034static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1035 struct nlattr **attrs)
28d8909b 1036{
a6483b79 1037 struct net *net = sock_net(skb->sk);
28d8909b 1038 struct sk_buff *r_skb;
7b67c857 1039 u32 *flags = nlmsg_data(nlh);
15e47304 1040 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1041 u32 seq = nlh->nlmsg_seq;
28d8909b 1042
7deb2264 1043 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1044 if (r_skb == NULL)
1045 return -ENOMEM;
1046
15e47304 1047 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
28d8909b
JHS		 1048 BUG();
1049
15e47304 1050 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1051}
1052
22e70050 1053static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1054 struct nlattr **attrs)
1da177e4 1055{
fc34acd3 1056 struct net *net = sock_net(skb->sk);
7b67c857 1057 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1058 struct xfrm_state *x;
1059 struct sk_buff *resp_skb;
eb2971b6 1060 int err = -ESRCH;
1da177e4 1061
fc34acd3 1062 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1063 if (x == NULL)
1064 goto out_noput;
1065
1066 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1067 if (IS_ERR(resp_skb)) {
1068 err = PTR_ERR(resp_skb);
1069 } else {
15e47304 1070 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1071 }
1072 xfrm_state_put(x);
1073out_noput:
1074 return err;
1075}
1076
22e70050 1077static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1078 struct nlattr **attrs)
1da177e4 1079{
fc34acd3 1080 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1081 struct xfrm_state *x;
1082 struct xfrm_userspi_info *p;
1083 struct sk_buff *resp_skb;
1084 xfrm_address_t *daddr;
1085 int family;
1086 int err;
6f26b61e
JHS		 1087 u32 mark;
1088 struct xfrm_mark m;
1da177e4 1089
7b67c857 1090 p = nlmsg_data(nlh);
776e9dd9 1091 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1092 if (err)
1093 goto out_noput;
1094
1095 family = p->info.family;
1096 daddr = &p->info.id.daddr;
1097
1098 x = NULL;
6f26b61e
JHS		 1099
1100 mark = xfrm_mark_get(attrs, &m);
1da177e4 1101 if (p->info.seq) {
6f26b61e 1102 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1103 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1104 xfrm_state_put(x);
1105 x = NULL;
1106 }
1107 }
1108
1109 if (!x)
6f26b61e 1110 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1111 p->info.id.proto, daddr,
1112 &p->info.saddr, 1,
1113 family);
1114 err = -ENOENT;
1115 if (x == NULL)
1116 goto out_noput;
1117
658b219e
HX		 1118 err = xfrm_alloc_spi(x, p->min, p->max);
1119 if (err)
1120 goto out;
1da177e4 1121
658b219e 1122 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1123 if (IS_ERR(resp_skb)) {
1124 err = PTR_ERR(resp_skb);
1125 goto out;
1126 }
1127
15e47304 1128 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1129
1130out:
1131 xfrm_state_put(x);
1132out_noput:
1133 return err;
1134}
1135
b798a9ed 1136static int verify_policy_dir(u8 dir)
1da177e4
LT		 1137{
1138 switch (dir) {
1139 case XFRM_POLICY_IN:
1140 case XFRM_POLICY_OUT:
1141 case XFRM_POLICY_FWD:
1142 break;
1143
1144 default:
1145 return -EINVAL;
3ff50b79 1146 }
1da177e4
LT		 1147
1148 return 0;
1149}
1150
b798a9ed 1151static int verify_policy_type(u8 type)
f7b6983f
MN		 1152{
1153 switch (type) {
1154 case XFRM_POLICY_TYPE_MAIN:
1155#ifdef CONFIG_XFRM_SUB_POLICY
1156 case XFRM_POLICY_TYPE_SUB:
1157#endif
1158 break;
1159
1160 default:
1161 return -EINVAL;
3ff50b79 1162 }
f7b6983f
MN		 1163
1164 return 0;
1165}
1166
1da177e4
LT		 1167static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1168{
e682adf0
FD		 1169 int ret;
1170
1da177e4
LT		 1171 switch (p->share) {
1172 case XFRM_SHARE_ANY:
1173 case XFRM_SHARE_SESSION:
1174 case XFRM_SHARE_USER:
1175 case XFRM_SHARE_UNIQUE:
1176 break;
1177
1178 default:
1179 return -EINVAL;
3ff50b79 1180 }
1da177e4
LT		 1181
1182 switch (p->action) {
1183 case XFRM_POLICY_ALLOW:
1184 case XFRM_POLICY_BLOCK:
1185 break;
1186
1187 default:
1188 return -EINVAL;
3ff50b79 1189 }
1da177e4
LT		 1190
1191 switch (p->sel.family) {
1192 case AF_INET:
1193 break;
1194
1195 case AF_INET6:
dfd56b8b 1196#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1197 break;
1198#else
1199 return -EAFNOSUPPORT;
1200#endif
1201
1202 default:
1203 return -EINVAL;
3ff50b79 1204 }
1da177e4 1205
e682adf0
FD		 1206 ret = verify_policy_dir(p->dir);
1207 if (ret)
1208 return ret;
1209 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1210 return -EINVAL;
1211
1212 return 0;
1da177e4
LT		 1213}
1214
5424f32e 1215static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1216{
5424f32e 1217 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1218 struct xfrm_user_sec_ctx *uctx;
1219
1220 if (!rt)
1221 return 0;
1222
5424f32e 1223 uctx = nla_data(rt);
52a4c640 1224 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1225}
1226
1da177e4
LT		 1227static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1228 int nr)
1229{
1230 int i;
1231
1232 xp->xfrm_nr = nr;
1233 for (i = 0; i < nr; i++, ut++) {
1234 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1235
1236 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1237 memcpy(&t->saddr, &ut->saddr,
1238 sizeof(xfrm_address_t));
1239 t->reqid = ut->reqid;
1240 t->mode = ut->mode;
1241 t->share = ut->share;
1242 t->optional = ut->optional;
1243 t->aalgos = ut->aalgos;
1244 t->ealgos = ut->ealgos;
1245 t->calgos = ut->calgos;
c5d18e98
HX		 1246 /* If all masks are ~0, then we allow all algorithms. */
1247 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1248 t->encap_family = ut->family;
1da177e4
LT		 1249 }
1250}
1251
b4ad86bf
DM		 1252static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1253{
1254 int i;
1255
1256 if (nr > XFRM_MAX_DEPTH)
1257 return -EINVAL;
1258
1259 for (i = 0; i < nr; i++) {
1260 /* We never validated the ut->family value, so many
1261 * applications simply leave it at zero. The check was
1262 * never made and ut->family was ignored because all
1263 * templates could be assumed to have the same family as
1264 * the policy itself. Now that we will have ipv4-in-ipv6
1265 * and ipv6-in-ipv4 tunnels, this is no longer true.
1266 */
1267 if (!ut[i].family)
1268 ut[i].family = family;
1269
1270 switch (ut[i].family) {
1271 case AF_INET:
1272 break;
dfd56b8b 1273#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1274 case AF_INET6:
1275 break;
1276#endif
1277 default:
1278 return -EINVAL;
3ff50b79 1279 }
b4ad86bf
DM		 1280 }
1281
1282 return 0;
1283}
1284
5424f32e 1285static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1286{
5424f32e 1287 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1288
1289 if (!rt) {
1290 pol->xfrm_nr = 0;
1291 } else {
5424f32e
TG		 1292 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1293 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1294 int err;
1da177e4 1295
b4ad86bf
DM		 1296 err = validate_tmpl(nr, utmpl, pol->family);
1297 if (err)
1298 return err;
1da177e4 1299
5424f32e 1300 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1301 }
1302 return 0;
1303}
1304
5424f32e 1305static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1306{
5424f32e 1307 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1308 struct xfrm_userpolicy_type *upt;
b798a9ed 1309 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1310 int err;
1311
1312 if (rt) {
5424f32e 1313 upt = nla_data(rt);
f7b6983f
MN		 1314 type = upt->type;
1315 }
1316
1317 err = verify_policy_type(type);
1318 if (err)
1319 return err;
1320
1321 *tp = type;
1322 return 0;
1323}
1324
1da177e4
LT		 1325static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1326{
1327 xp->priority = p->priority;
1328 xp->index = p->index;
1329 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1330 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1331 xp->action = p->action;
1332 xp->flags = p->flags;
1333 xp->family = p->sel.family;
1334 /* XXX xp->share = p->share; */
1335}
1336
1337static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1338{
7b789836 1339 memset(p, 0, sizeof(*p));
1da177e4
LT		 1340 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1341 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1342 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1343 p->priority = xp->priority;
1344 p->index = xp->index;
1345 p->sel.family = xp->family;
1346 p->dir = dir;
1347 p->action = xp->action;
1348 p->flags = xp->flags;
1349 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1350}
1351
fc34acd3 1352static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1353{
fc34acd3 1354 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1355 int err;
1356
1357 if (!xp) {
1358 *errp = -ENOMEM;
1359 return NULL;
1360 }
1361
1362 copy_from_user_policy(xp, p);
df71837d 1363
35a7aa08 1364 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1365 if (err)
1366 goto error;
1367
35a7aa08
TG		 1368 if (!(err = copy_from_user_tmpl(xp, attrs)))
1369 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1370 if (err)
1371 goto error;
1da177e4 1372
295fae56
JHS		 1373 xfrm_mark_get(attrs, &xp->mark);
1374
1da177e4 1375 return xp;
f7b6983f
MN		 1376 error:
1377 *errp = err;
12a169e7 1378 xp->walk.dead = 1;
64c31b3f 1379 xfrm_policy_destroy(xp);
f7b6983f 1380 return NULL;
1da177e4
LT		 1381}
1382
22e70050 1383static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1384 struct nlattr **attrs)
1da177e4 1385{
fc34acd3 1386 struct net *net = sock_net(skb->sk);
7b67c857 1387 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1388 struct xfrm_policy *xp;
26b15dad 1389 struct km_event c;
1da177e4
LT		 1390 int err;
1391 int excl;
e1760bd5 1392 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1393 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed 1394 u32 sid;
1da177e4
LT		 1395
1396 err = verify_newpolicy_info(p);
df71837d
TJ		 1397 if (err)
1398 return err;
35a7aa08 1399 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1400 if (err)
1401 return err;
1402
fc34acd3 1403 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1404 if (!xp)
1405 return err;
1406
25985edc 1407 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1408 * Aha! this is anti-netlink really i.e more pfkey derived
1409 * in netlink excl is a flag and you wouldnt need
1410 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1411 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1412 err = xfrm_policy_insert(p->dir, xp, excl);
c53fa1ed 1413 security_task_getsecid(current, &sid);
2532386f 1414 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 1415
1da177e4 1416 if (err) {
03e1ad7b 1417 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1418 kfree(xp);
1419 return err;
1420 }
1421
f60f6b8f 1422 c.event = nlh->nlmsg_type;
26b15dad 1423 c.seq = nlh->nlmsg_seq;
15e47304 1424 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1425 km_policy_notify(xp, p->dir, &c);
1426
1da177e4
LT		 1427 xfrm_pol_put(xp);
1428
1429 return 0;
1430}
1431
1432static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1433{
1434 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1435 int i;
1436
1437 if (xp->xfrm_nr == 0)
1438 return 0;
1439
1440 for (i = 0; i < xp->xfrm_nr; i++) {
1441 struct xfrm_user_tmpl *up = &vec[i];
1442 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1443
1f86840f 1444 memset(up, 0, sizeof(*up));
1da177e4 1445 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1446 up->family = kp->encap_family;
1da177e4
LT		 1447 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1448 up->reqid = kp->reqid;
1449 up->mode = kp->mode;
1450 up->share = kp->share;
1451 up->optional = kp->optional;
1452 up->aalgos = kp->aalgos;
1453 up->ealgos = kp->ealgos;
1454 up->calgos = kp->calgos;
1455 }
df71837d 1456
c0144bea
TG		 1457 return nla_put(skb, XFRMA_TMPL,
1458 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1459}
1460
1461static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1462{
1463 if (x->security) {
1464 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1465 }
1466 return 0;
0d681623 1467}
df71837d 1468
0d681623
SH		 1469static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1470{
1d1e34dd 1471 if (xp->security)
0d681623 1472 return copy_sec_ctx(xp->security, skb);
0d681623 1473 return 0;
df71837d 1474}
cfbfd45a
TG		 1475static inline size_t userpolicy_type_attrsize(void)
1476{
1477#ifdef CONFIG_XFRM_SUB_POLICY
1478 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1479#else
1480 return 0;
1481#endif
1482}
df71837d 1483
f7b6983f 1484#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1485static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1486{
c0144bea
TG		 1487 struct xfrm_userpolicy_type upt = {
1488 .type = type,
1489 };
f7b6983f 1490
c0144bea 1491 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1492}
1493
1494#else
b798a9ed 1495static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1496{
1497 return 0;
1498}
1499#endif
1500
1da177e4
LT		 1501static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1502{
1503 struct xfrm_dump_info *sp = ptr;
1504 struct xfrm_userpolicy_info *p;
1505 struct sk_buff *in_skb = sp->in_skb;
1506 struct sk_buff *skb = sp->out_skb;
1507 struct nlmsghdr *nlh;
1d1e34dd 1508 int err;
1da177e4 1509
15e47304 1510 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1511 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1512 if (nlh == NULL)
1513 return -EMSGSIZE;
1da177e4 1514
7b67c857 1515 p = nlmsg_data(nlh);
1da177e4 1516 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1517 err = copy_to_user_tmpl(xp, skb);
1518 if (!err)
1519 err = copy_to_user_sec_ctx(xp, skb);
1520 if (!err)
1521 err = copy_to_user_policy_type(xp->type, skb);
1522 if (!err)
1523 err = xfrm_mark_put(skb, &xp->mark);
1524 if (err) {
1525 nlmsg_cancel(skb, nlh);
1526 return err;
1527 }
9825069d 1528 nlmsg_end(skb, nlh);
1da177e4 1529 return 0;
1da177e4
LT		 1530}
1531
4c563f76
TT		 1532static int xfrm_dump_policy_done(struct netlink_callback *cb)
1533{
1534 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
283bc9f3 1535 struct net *net = sock_net(cb->skb->sk);
4c563f76 1536
283bc9f3 1537 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1538 return 0;
1539}
1540
1da177e4
LT		 1541static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1542{
fc34acd3 1543 struct net *net = sock_net(skb->sk);
4c563f76 1544 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1545 struct xfrm_dump_info info;
1546
4c563f76
TT		 1547 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1548 sizeof(cb->args) - sizeof(cb->args[0]));
1549
1da177e4
LT		 1550 info.in_skb = cb->skb;
1551 info.out_skb = skb;
1552 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1553 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1554
1555 if (!cb->args[0]) {
1556 cb->args[0] = 1;
1557 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1558 }
1559
fc34acd3 1560 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1561
1562 return skb->len;
1563}
1564
1565static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1566 struct xfrm_policy *xp,
1567 int dir, u32 seq)
1568{
1569 struct xfrm_dump_info info;
1570 struct sk_buff *skb;
c2546372 1571 int err;
1da177e4 1572
7deb2264 1573 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1574 if (!skb)
1575 return ERR_PTR(-ENOMEM);
1576
1da177e4
LT		 1577 info.in_skb = in_skb;
1578 info.out_skb = skb;
1579 info.nlmsg_seq = seq;
1580 info.nlmsg_flags = 0;
1da177e4 1581
c2546372
MK		 1582 err = dump_one_policy(xp, dir, 0, &info);
1583 if (err) {
1da177e4 1584 kfree_skb(skb);
c2546372 1585 return ERR_PTR(err);
1da177e4
LT		 1586 }
1587
1588 return skb;
1589}
1590
22e70050 1591static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1592 struct nlattr **attrs)
1da177e4 1593{
fc34acd3 1594 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1595 struct xfrm_policy *xp;
1596 struct xfrm_userpolicy_id *p;
b798a9ed 1597 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1598 int err;
26b15dad 1599 struct km_event c;
1da177e4 1600 int delete;
295fae56
JHS		 1601 struct xfrm_mark m;
1602 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1603
7b67c857 1604 p = nlmsg_data(nlh);
1da177e4
LT		 1605 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1606
35a7aa08 1607 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1608 if (err)
1609 return err;
1610
1da177e4
LT		 1611 err = verify_policy_dir(p->dir);
1612 if (err)
1613 return err;
1614
1615 if (p->index)
295fae56 1616 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1617 else {
5424f32e 1618 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1619 struct xfrm_sec_ctx *ctx;
df71837d 1620
35a7aa08 1621 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1622 if (err)
1623 return err;
1624
2c8dd116 1625 ctx = NULL;
df71837d 1626 if (rt) {
5424f32e 1627 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1628
52a4c640 1629 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1630 if (err)
df71837d 1631 return err;
2c8dd116 1632 }
295fae56 1633 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1634 ctx, delete, &err);
03e1ad7b 1635 security_xfrm_policy_free(ctx);
df71837d 1636 }
1da177e4
LT		 1637 if (xp == NULL)
1638 return -ENOENT;
1639
1640 if (!delete) {
1641 struct sk_buff *resp_skb;
1642
1643 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1644 if (IS_ERR(resp_skb)) {
1645 err = PTR_ERR(resp_skb);
1646 } else {
a6483b79 1647 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1648 NETLINK_CB(skb).portid);
1da177e4 1649 }
26b15dad 1650 } else {
e1760bd5 1651 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1652 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed 1653 u32 sid;
2532386f 1654
c53fa1ed 1655 security_task_getsecid(current, &sid);
2532386f
EP		 1656 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1657 sid);
13fcfbb0
DM		 1658
1659 if (err != 0)
c8c05a8e 1660 goto out;
13fcfbb0 1661
e7443892 1662 c.data.byid = p->index;
f60f6b8f 1663 c.event = nlh->nlmsg_type;
26b15dad 1664 c.seq = nlh->nlmsg_seq;
15e47304 1665 c.portid = nlh->nlmsg_pid;
26b15dad 1666 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1667 }
1668
c8c05a8e 1669out:
ef41aaa0 1670 xfrm_pol_put(xp);
e4c17216
PM		 1671 if (delete && err == 0)
1672 xfrm_garbage_collect(net);
1da177e4
LT		 1673 return err;
1674}
1675
22e70050 1676static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1677 struct nlattr **attrs)
1da177e4 1678{
fc34acd3 1679 struct net *net = sock_net(skb->sk);
26b15dad 1680 struct km_event c;
7b67c857 1681 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1682 struct xfrm_audit audit_info;
4aa2e62c 1683 int err;
1da177e4 1684
c53fa1ed
PM		 1685 audit_info.loginuid = audit_get_loginuid(current);
1686 audit_info.sessionid = audit_get_sessionid(current);
1687 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1688 err = xfrm_state_flush(net, p->proto, &audit_info);
9e64cc95
JHS		 1689 if (err) {
1690 if (err == -ESRCH) /* empty table */
1691 return 0;
069c474e 1692 return err;
9e64cc95 1693 }
bf08867f 1694 c.data.proto = p->proto;
f60f6b8f 1695 c.event = nlh->nlmsg_type;
26b15dad 1696 c.seq = nlh->nlmsg_seq;
15e47304 1697 c.portid = nlh->nlmsg_pid;
7067802e 1698 c.net = net;
26b15dad
JHS		 1699 km_state_notify(NULL, &c);
1700
1da177e4
LT		 1701 return 0;
1702}
1703
d8647b79 1704static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1705{
d8647b79
SK		 1706 size_t replay_size = x->replay_esn ?
1707 xfrm_replay_state_esn_len(x->replay_esn) :
1708 sizeof(struct xfrm_replay_state);
1709
7deb2264 1710 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1711 + nla_total_size(replay_size)
7deb2264 1712 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1713 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1714 + nla_total_size(4) /* XFRM_AE_RTHR */
1715 + nla_total_size(4); /* XFRM_AE_ETHR */
1716}
d51d081d 1717
214e005b 1718static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1719{
1720 struct xfrm_aevent_id *id;
1721 struct nlmsghdr *nlh;
1d1e34dd 1722 int err;
d51d081d 1723
15e47304 1724 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1725 if (nlh == NULL)
1726 return -EMSGSIZE;
d51d081d 1727
7b67c857 1728 id = nlmsg_data(nlh);
9b7a787d 1729 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1730 id->sa_id.spi = x->id.spi;
1731 id->sa_id.family = x->props.family;
1732 id->sa_id.proto = x->id.proto;
9b7a787d 1733 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1734 id->reqid = x->props.reqid;
d51d081d
JHS		 1735 id->flags = c->data.aevent;
1736
d0fde795 1737 if (x->replay_esn) {
1d1e34dd
DM		 1738 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1739 xfrm_replay_state_esn_len(x->replay_esn),
1740 x->replay_esn);
d0fde795 1741 } else {
1d1e34dd
DM		 1742 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1743 &x->replay);
d0fde795 1744 }
1d1e34dd
DM		 1745 if (err)
1746 goto out_cancel;
1747 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1748 if (err)
1749 goto out_cancel;
d51d081d 1750
1d1e34dd
DM		 1751 if (id->flags & XFRM_AE_RTHR) {
1752 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1753 if (err)
1754 goto out_cancel;
1755 }
1756 if (id->flags & XFRM_AE_ETHR) {
1757 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1758 x->replay_maxage * 10 / HZ);
1759 if (err)
1760 goto out_cancel;
1761 }
1762 err = xfrm_mark_put(skb, &x->mark);
1763 if (err)
1764 goto out_cancel;
6f26b61e 1765
9825069d 1766 return nlmsg_end(skb, nlh);
d51d081d 1767
1d1e34dd 1768out_cancel:
9825069d 1769 nlmsg_cancel(skb, nlh);
1d1e34dd 1770 return err;
d51d081d
JHS		 1771}
1772
22e70050 1773static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1774 struct nlattr **attrs)
d51d081d 1775{
fc34acd3 1776 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1777 struct xfrm_state *x;
1778 struct sk_buff *r_skb;
1779 int err;
1780 struct km_event c;
6f26b61e
JHS		 1781 u32 mark;
1782 struct xfrm_mark m;
7b67c857 1783 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1784 struct xfrm_usersa_id *id = &p->sa_id;
1785
6f26b61e
JHS		 1786 mark = xfrm_mark_get(attrs, &m);
1787
1788 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1789 if (x == NULL)
d51d081d 1790 return -ESRCH;
d8647b79
SK		 1791
1792 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1793 if (r_skb == NULL) {
1794 xfrm_state_put(x);
1795 return -ENOMEM;
d51d081d
JHS		 1796 }
1797
1798 /*
1799 * XXX: is this lock really needed - none of the other
1800 * gets lock (the concern is things getting updated
1801 * while we are still reading) - jhs
1802 */
1803 spin_lock_bh(&x->lock);
1804 c.data.aevent = p->flags;
1805 c.seq = nlh->nlmsg_seq;
15e47304 1806 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1807
1808 if (build_aevent(r_skb, x, &c) < 0)
1809 BUG();
15e47304 1810 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1811 spin_unlock_bh(&x->lock);
1812 xfrm_state_put(x);
1813 return err;
1814}
1815
22e70050 1816static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1817 struct nlattr **attrs)
d51d081d 1818{
fc34acd3 1819 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1820 struct xfrm_state *x;
1821 struct km_event c;
02d0892f 1822 int err = -EINVAL;
6f26b61e
JHS		 1823 u32 mark = 0;
1824 struct xfrm_mark m;
7b67c857 1825 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1826 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1827 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1828 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d 1829
d8647b79 1830 if (!lt && !rp && !re)
d51d081d
JHS		 1831 return err;
1832
1833 /* pedantic mode - thou shalt sayeth replaceth */
1834 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1835 return err;
1836
6f26b61e
JHS		 1837 mark = xfrm_mark_get(attrs, &m);
1838
1839 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1840 if (x == NULL)
1841 return -ESRCH;
1842
1843 if (x->km.state != XFRM_STATE_VALID)
1844 goto out;
1845
4479ff76 1846 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 1847 if (err)
1848 goto out;
1849
d51d081d 1850 spin_lock_bh(&x->lock);
e3ac104d 1851 xfrm_update_ae_params(x, attrs, 1);
d51d081d 1852 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1853
1854 c.event = nlh->nlmsg_type;
1855 c.seq = nlh->nlmsg_seq;
15e47304 1856 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1857 c.data.aevent = XFRM_AE_CU;
1858 km_state_notify(x, &c);
1859 err = 0;
1860out:
1861 xfrm_state_put(x);
1862 return err;
1863}
1864
22e70050 1865static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1866 struct nlattr **attrs)
1da177e4 1867{
fc34acd3 1868 struct net *net = sock_net(skb->sk);
f7b6983f 1869 struct km_event c;
b798a9ed 1870 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1871 int err;
161a09e7 1872 struct xfrm_audit audit_info;
f7b6983f 1873
35a7aa08 1874 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1875 if (err)
1876 return err;
26b15dad 1877
c53fa1ed
PM		 1878 audit_info.loginuid = audit_get_loginuid(current);
1879 audit_info.sessionid = audit_get_sessionid(current);
1880 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1881 err = xfrm_policy_flush(net, type, &audit_info);
2f1eb65f
JHS		 1882 if (err) {
1883 if (err == -ESRCH) /* empty table */
1884 return 0;
069c474e 1885 return err;
2f1eb65f
JHS		 1886 }
1887
f7b6983f 1888 c.data.type = type;
f60f6b8f 1889 c.event = nlh->nlmsg_type;
26b15dad 1890 c.seq = nlh->nlmsg_seq;
15e47304 1891 c.portid = nlh->nlmsg_pid;
7067802e 1892 c.net = net;
26b15dad 1893 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1894 return 0;
1895}
1896
22e70050 1897static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1898 struct nlattr **attrs)
6c5c8ca7 1899{
fc34acd3 1900 struct net *net = sock_net(skb->sk);
6c5c8ca7 1901 struct xfrm_policy *xp;
7b67c857 1902 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1903 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1904 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 1905 int err = -ENOENT;
295fae56
JHS		 1906 struct xfrm_mark m;
1907 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 1908
35a7aa08 1909 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1910 if (err)
1911 return err;
1912
c8bf4d04
TT		 1913 err = verify_policy_dir(p->dir);
1914 if (err)
1915 return err;
1916
6c5c8ca7 1917 if (p->index)
295fae56 1918 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 1919 else {
5424f32e 1920 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1921 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1922
35a7aa08 1923 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1924 if (err)
1925 return err;
1926
2c8dd116 1927 ctx = NULL;
6c5c8ca7 1928 if (rt) {
5424f32e 1929 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1930
52a4c640 1931 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1932 if (err)
6c5c8ca7 1933 return err;
2c8dd116 1934 }
295fae56 1935 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 1936 &p->sel, ctx, 0, &err);
03e1ad7b 1937 security_xfrm_policy_free(ctx);
6c5c8ca7 1938 }
6c5c8ca7 1939 if (xp == NULL)
ef41aaa0 1940 return -ENOENT;
03e1ad7b 1941
ea2dea9d 1942 if (unlikely(xp->walk.dead))
6c5c8ca7 1943 goto out;
6c5c8ca7 1944
6c5c8ca7
JHS		 1945 err = 0;
1946 if (up->hard) {
e1760bd5 1947 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1948 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed
PM		 1949 u32 sid;
1950
1951 security_task_getsecid(current, &sid);
6c5c8ca7 1952 xfrm_policy_delete(xp, p->dir);
2532386f 1953 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
161a09e7 1954
6c5c8ca7
JHS		 1955 } else {
1956 // reset the timers here?
62db5cfd 1957 WARN(1, "Dont know what to do with soft policy expire\n");
6c5c8ca7 1958 }
c6bb8136 1959 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 1960
1961out:
1962 xfrm_pol_put(xp);
1963 return err;
1964}
1965
22e70050 1966static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1967 struct nlattr **attrs)
53bc6b4d 1968{
fc34acd3 1969 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 1970 struct xfrm_state *x;
1971 int err;
7b67c857 1972 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 1973 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 1974 struct xfrm_mark m;
928497f0 1975 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 1976
6f26b61e 1977 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1978
3a765aa5 1979 err = -ENOENT;
53bc6b4d
JHS		 1980 if (x == NULL)
1981 return err;
1982
53bc6b4d 1983 spin_lock_bh(&x->lock);
3a765aa5 1984 err = -EINVAL;
53bc6b4d
JHS		 1985 if (x->km.state != XFRM_STATE_VALID)
1986 goto out;
c6bb8136 1987 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 1988
161a09e7 1989 if (ue->hard) {
e1760bd5 1990 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1991 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed
PM		 1992 u32 sid;
1993
1994 security_task_getsecid(current, &sid);
53bc6b4d 1995 __xfrm_state_delete(x);
2532386f 1996 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
161a09e7 1997 }
3a765aa5 1998 err = 0;
53bc6b4d
JHS		 1999out:
2000 spin_unlock_bh(&x->lock);
2001 xfrm_state_put(x);
2002 return err;
2003}
2004
22e70050 2005static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2006 struct nlattr **attrs)
980ebd25 2007{
fc34acd3 2008 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2009 struct xfrm_policy *xp;
2010 struct xfrm_user_tmpl *ut;
2011 int i;
5424f32e 2012 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2013 struct xfrm_mark mark;
980ebd25 2014
7b67c857 2015 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2016 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2017 int err = -ENOMEM;
2018
2019 if (!x)
d8eb9307 2020 goto nomem;
980ebd25 2021
6f26b61e
JHS		 2022 xfrm_mark_get(attrs, &mark);
2023
980ebd25 2024 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 2025 if (err)
2026 goto bad_policy;
980ebd25
JHS		 2027
2028 /* build an XP */
fc34acd3 2029 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2030 if (!xp)
2031 goto free_state;
980ebd25
JHS		 2032
2033 memcpy(&x->id, &ua->id, sizeof(ua->id));
2034 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2035 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2036 xp->mark.m = x->mark.m = mark.m;
2037 xp->mark.v = x->mark.v = mark.v;
5424f32e 2038 ut = nla_data(rt);
980ebd25
JHS		 2039 /* extract the templates and for each call km_key */
2040 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2041 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2042 memcpy(&x->id, &t->id, sizeof(x->id));
2043 x->props.mode = t->mode;
2044 x->props.reqid = t->reqid;
2045 x->props.family = ut->family;
2046 t->aalgos = ua->aalgos;
2047 t->ealgos = ua->ealgos;
2048 t->calgos = ua->calgos;
2049 err = km_query(x, t, xp);
2050
2051 }
2052
2053 kfree(x);
2054 kfree(xp);
2055
2056 return 0;
d8eb9307
IJ		 2057
2058bad_policy:
62db5cfd 2059 WARN(1, "BAD policy passed\n");
d8eb9307
IJ		 2060free_state:
2061 kfree(x);
2062nomem:
2063 return err;
980ebd25
JHS		 2064}
2065
5c79de6e 2066#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2067static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2068 struct xfrm_kmaddress *k,
5424f32e 2069 struct nlattr **attrs, int *num)
5c79de6e 2070{
5424f32e 2071 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2072 struct xfrm_user_migrate *um;
2073 int i, num_migrate;
2074
13c1d189
AE		 2075 if (k != NULL) {
2076 struct xfrm_user_kmaddress *uk;
2077
2078 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2079 memcpy(&k->local, &uk->local, sizeof(k->local));
2080 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2081 k->family = uk->family;
2082 k->reserved = uk->reserved;
2083 }
2084
5424f32e
TG		 2085 um = nla_data(rt);
2086 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2087
2088 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2089 return -EINVAL;
2090
2091 for (i = 0; i < num_migrate; i++, um++, ma++) {
2092 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2093 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2094 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2095 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2096
2097 ma->proto = um->proto;
2098 ma->mode = um->mode;
2099 ma->reqid = um->reqid;
2100
2101 ma->old_family = um->old_family;
2102 ma->new_family = um->new_family;
2103 }
2104
2105 *num = i;
2106 return 0;
2107}
2108
2109static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2110 struct nlattr **attrs)
5c79de6e 2111{
7b67c857 2112 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2113 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2114 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2115 u8 type;
2116 int err;
2117 int n = 0;
8d549c4f 2118 struct net *net = sock_net(skb->sk);
5c79de6e 2119
35a7aa08 2120 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2121 return -EINVAL;
5c79de6e 2122
13c1d189
AE		 2123 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2124
5424f32e 2125 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2126 if (err)
2127 return err;
2128
13c1d189 2129 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2130 if (err)
2131 return err;
2132
2133 if (!n)
2134 return 0;
2135
8d549c4f 2136 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
5c79de6e
SS		 2137
2138 return 0;
2139}
2140#else
2141static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2142 struct nlattr **attrs)
5c79de6e
SS		 2143{
2144 return -ENOPROTOOPT;
2145}
2146#endif
2147
2148#ifdef CONFIG_XFRM_MIGRATE
183cad12 2149static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2150{
2151 struct xfrm_user_migrate um;
2152
2153 memset(&um, 0, sizeof(um));
2154 um.proto = m->proto;
2155 um.mode = m->mode;
2156 um.reqid = m->reqid;
2157 um.old_family = m->old_family;
2158 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2159 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2160 um.new_family = m->new_family;
2161 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2162 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2163
c0144bea 2164 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2165}
2166
183cad12 2167static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2168{
2169 struct xfrm_user_kmaddress uk;
2170
2171 memset(&uk, 0, sizeof(uk));
2172 uk.family = k->family;
2173 uk.reserved = k->reserved;
2174 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2175 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2176
2177 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2178}
2179
2180static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 2181{
2182 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 2183 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2184 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2185 + userpolicy_type_attrsize();
7deb2264
TG		 2186}
2187
183cad12
DM		 2188static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2189 int num_migrate, const struct xfrm_kmaddress *k,
2190 const struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e 2191{
183cad12 2192 const struct xfrm_migrate *mp;
5c79de6e
SS		 2193 struct xfrm_userpolicy_id *pol_id;
2194 struct nlmsghdr *nlh;
1d1e34dd 2195 int i, err;
5c79de6e 2196
79b8b7f4
TG		 2197 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2198 if (nlh == NULL)
2199 return -EMSGSIZE;
5c79de6e 2200
7b67c857 2201 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2202 /* copy data from selector, dir, and type to the pol_id */
2203 memset(pol_id, 0, sizeof(*pol_id));
2204 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2205 pol_id->dir = dir;
2206
1d1e34dd
DM		 2207 if (k != NULL) {
2208 err = copy_to_user_kmaddress(k, skb);
2209 if (err)
2210 goto out_cancel;
2211 }
2212 err = copy_to_user_policy_type(type, skb);
2213 if (err)
2214 goto out_cancel;
5c79de6e 2215 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2216 err = copy_to_user_migrate(mp, skb);
2217 if (err)
2218 goto out_cancel;
5c79de6e
SS		 2219 }
2220
9825069d 2221 return nlmsg_end(skb, nlh);
1d1e34dd
DM		 2222
2223out_cancel:
9825069d 2224 nlmsg_cancel(skb, nlh);
1d1e34dd 2225 return err;
5c79de6e
SS		 2226}
2227
183cad12
DM		 2228static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2229 const struct xfrm_migrate *m, int num_migrate,
2230 const struct xfrm_kmaddress *k)
5c79de6e 2231{
a6483b79 2232 struct net *net = &init_net;
5c79de6e 2233 struct sk_buff *skb;
5c79de6e 2234
13c1d189 2235 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2236 if (skb == NULL)
2237 return -ENOMEM;
2238
2239 /* build migrate */
13c1d189 2240 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2241 BUG();
2242
a6483b79 2243 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 2244}
2245#else
183cad12
DM		 2246static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2247 const struct xfrm_migrate *m, int num_migrate,
2248 const struct xfrm_kmaddress *k)
5c79de6e
SS		 2249{
2250 return -ENOPROTOOPT;
2251}
2252#endif
d51d081d 2253
a7bd9a45 2254#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2255
2256static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2257 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2258 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2259 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2260 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2261 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2262 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2263 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2264 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2265 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2266 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2267 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2268 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2269 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2270 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2271 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2272 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2273 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2274 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 2275 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2276 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2277};
2278
492b558b
TG		 2279#undef XMSGSIZE
2280
cf5cb79f 2281static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2282 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2283 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2284 [XFRMA_LASTUSED] = { .type = NLA_U64},
2285 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2286 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2287 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2288 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2289 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2290 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2291 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2292 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2293 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2294 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2295 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2296 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2297 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2298 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2299 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2300 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2301 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2302 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2303 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2304 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2305 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
cf5cb79f
TG		 2306};
2307
05600a79 2308static const struct xfrm_link {
5424f32e 2309 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2310 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2311 int (*done)(struct netlink_callback *);
492b558b
TG		 2312} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2313 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2314 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2315 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2316 .dump = xfrm_dump_sa,
2317 .done = xfrm_dump_sa_done },
492b558b
TG		 2318 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2319 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2320 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2321 .dump = xfrm_dump_policy,
2322 .done = xfrm_dump_policy_done },
492b558b 2323 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2324 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2325 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2326 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2327 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2328 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2329 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2330 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2331 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2332 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2333 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2334 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 2335 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2336};
2337
1d00a4eb 2338static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2339{
a6483b79 2340 struct net *net = sock_net(skb->sk);
35a7aa08 2341 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2342 const struct xfrm_link *link;
a7bd9a45 2343 int type, err;
1da177e4 2344
1da177e4 2345 type = nlh->nlmsg_type;
1da177e4 2346 if (type > XFRM_MSG_MAX)
1d00a4eb 2347 return -EINVAL;
1da177e4
LT		 2348
2349 type -= XFRM_MSG_BASE;
2350 link = &xfrm_dispatch[type];
2351
2352 /* All operations require privileges, even GET */
df008c91 2353 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1d00a4eb 2354 return -EPERM;
1da177e4 2355
492b558b
TG		 2356 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2357 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2358 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2359 if (link->dump == NULL)
1d00a4eb 2360 return -EINVAL;
88fc2c84 2361
80d326fa
PNA		 2362 {
2363 struct netlink_dump_control c = {
2364 .dump = link->dump,
2365 .done = link->done,
2366 };
2367 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2368 }
1da177e4
LT		 2369 }
2370
35a7aa08 2371 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2372 xfrma_policy);
a7bd9a45
TG		 2373 if (err < 0)
2374 return err;
1da177e4
LT		 2375
2376 if (link->doit == NULL)
1d00a4eb 2377 return -EINVAL;
1da177e4 2378
5424f32e 2379 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2380}
2381
cd40b7d3 2382static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2383{
283bc9f3
FD		 2384 struct net *net = sock_net(skb->sk);
2385
2386 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2387 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2388 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2389}
2390
7deb2264
TG		 2391static inline size_t xfrm_expire_msgsize(void)
2392{
6f26b61e
JHS		 2393 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2394 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2395}
2396
214e005b 2397static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2398{
2399 struct xfrm_user_expire *ue;
2400 struct nlmsghdr *nlh;
1d1e34dd 2401 int err;
1da177e4 2402
15e47304 2403 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2404 if (nlh == NULL)
2405 return -EMSGSIZE;
1da177e4 2406
7b67c857 2407 ue = nlmsg_data(nlh);
1da177e4 2408 copy_to_user_state(x, &ue->state);
d51d081d 2409 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2410
1d1e34dd
DM		 2411 err = xfrm_mark_put(skb, &x->mark);
2412 if (err)
2413 return err;
6f26b61e 2414
9825069d 2415 return nlmsg_end(skb, nlh);
1da177e4
LT		 2416}
2417
214e005b 2418static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2419{
fc34acd3 2420 struct net *net = xs_net(x);
1da177e4
LT		 2421 struct sk_buff *skb;
2422
7deb2264 2423 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2424 if (skb == NULL)
2425 return -ENOMEM;
2426
6f26b61e
JHS		 2427 if (build_expire(skb, x, c) < 0) {
2428 kfree_skb(skb);
2429 return -EMSGSIZE;
2430 }
1da177e4 2431
a6483b79 2432 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2433}
2434
214e005b 2435static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2436{
fc34acd3 2437 struct net *net = xs_net(x);
d51d081d 2438 struct sk_buff *skb;
d51d081d 2439
d8647b79 2440 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2441 if (skb == NULL)
2442 return -ENOMEM;
2443
2444 if (build_aevent(skb, x, c) < 0)
2445 BUG();
2446
a6483b79 2447 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2448}
2449
214e005b 2450static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2451{
7067802e 2452 struct net *net = c->net;
26b15dad
JHS		 2453 struct xfrm_usersa_flush *p;
2454 struct nlmsghdr *nlh;
2455 struct sk_buff *skb;
7deb2264 2456 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2457
7deb2264 2458 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2459 if (skb == NULL)
2460 return -ENOMEM;
26b15dad 2461
15e47304 2462 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2463 if (nlh == NULL) {
2464 kfree_skb(skb);
2465 return -EMSGSIZE;
2466 }
26b15dad 2467
7b67c857 2468 p = nlmsg_data(nlh);
bf08867f 2469 p->proto = c->data.proto;
26b15dad 2470
9825069d 2471 nlmsg_end(skb, nlh);
26b15dad 2472
a6483b79 2473 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2474}
2475
7deb2264 2476static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2477{
7deb2264 2478 size_t l = 0;
1a6509d9
HX		 2479 if (x->aead)
2480 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2481 if (x->aalg) {
2482 l += nla_total_size(sizeof(struct xfrm_algo) +
2483 (x->aalg->alg_key_len + 7) / 8);
2484 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2485 }
26b15dad 2486 if (x->ealg)
0f99be0d 2487 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2488 if (x->calg)
7deb2264 2489 l += nla_total_size(sizeof(*x->calg));
26b15dad 2490 if (x->encap)
7deb2264 2491 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2492 if (x->tfcpad)
2493 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2494 if (x->replay_esn)
2495 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
68325d3b
HX		 2496 if (x->security)
2497 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2498 x->security->ctx_len);
2499 if (x->coaddr)
2500 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2501 if (x->props.extra_flags)
2502 l += nla_total_size(sizeof(x->props.extra_flags));
68325d3b 2503
d26f3984
HX		 2504 /* Must count x->lastused as it may become non-zero behind our back. */
2505 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2506
2507 return l;
2508}
2509
214e005b 2510static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2511{
fc34acd3 2512 struct net *net = xs_net(x);
26b15dad 2513 struct xfrm_usersa_info *p;
0603eac0 2514 struct xfrm_usersa_id *id;
26b15dad
JHS		 2515 struct nlmsghdr *nlh;
2516 struct sk_buff *skb;
26b15dad 2517 int len = xfrm_sa_len(x);
1d1e34dd 2518 int headlen, err;
0603eac0
HX		 2519
2520 headlen = sizeof(*p);
2521 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2522 len += nla_total_size(headlen);
0603eac0 2523 headlen = sizeof(*id);
6f26b61e 2524 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2525 }
7deb2264 2526 len += NLMSG_ALIGN(headlen);
26b15dad 2527
7deb2264 2528 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2529 if (skb == NULL)
2530 return -ENOMEM;
26b15dad 2531
15e47304 2532 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2533 err = -EMSGSIZE;
79b8b7f4 2534 if (nlh == NULL)
1d1e34dd 2535 goto out_free_skb;
26b15dad 2536
7b67c857 2537 p = nlmsg_data(nlh);
0603eac0 2538 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2539 struct nlattr *attr;
2540
7b67c857 2541 id = nlmsg_data(nlh);
0603eac0
HX		 2542 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2543 id->spi = x->id.spi;
2544 id->family = x->props.family;
2545 id->proto = x->id.proto;
2546
c0144bea 2547 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2548 err = -EMSGSIZE;
c0144bea 2549 if (attr == NULL)
1d1e34dd 2550 goto out_free_skb;
c0144bea
TG		 2551
2552 p = nla_data(attr);
0603eac0 2553 }
1d1e34dd
DM		 2554 err = copy_to_user_state_extra(x, p, skb);
2555 if (err)
2556 goto out_free_skb;
26b15dad 2557
9825069d 2558 nlmsg_end(skb, nlh);
26b15dad 2559
a6483b79 2560 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2561
1d1e34dd 2562out_free_skb:
26b15dad 2563 kfree_skb(skb);
1d1e34dd 2564 return err;
26b15dad
JHS		 2565}
2566
214e005b 2567static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2568{
2569
2570 switch (c->event) {
f60f6b8f 2571 case XFRM_MSG_EXPIRE:
26b15dad 2572 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2573 case XFRM_MSG_NEWAE:
2574 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2575 case XFRM_MSG_DELSA:
2576 case XFRM_MSG_UPDSA:
2577 case XFRM_MSG_NEWSA:
26b15dad 2578 return xfrm_notify_sa(x, c);
f60f6b8f 2579 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2580 return xfrm_notify_sa_flush(c);
2581 default:
62db5cfd 2582 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2583 c->event);
2584 break;
26b15dad
JHS		 2585 }
2586
2587 return 0;
2588
2589}
2590
7deb2264
TG		 2591static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2592 struct xfrm_policy *xp)
2593{
2594 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2595 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2596 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2597 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2598 + userpolicy_type_attrsize();
2599}
2600
1da177e4 2601static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2602 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2603{
1d1e34dd 2604 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2605 struct xfrm_user_acquire *ua;
2606 struct nlmsghdr *nlh;
1d1e34dd 2607 int err;
1da177e4 2608
79b8b7f4
TG		 2609 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2610 if (nlh == NULL)
2611 return -EMSGSIZE;
1da177e4 2612
7b67c857 2613 ua = nlmsg_data(nlh);
1da177e4
LT		 2614 memcpy(&ua->id, &x->id, sizeof(ua->id));
2615 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2616 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2617 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2618 ua->aalgos = xt->aalgos;
2619 ua->ealgos = xt->ealgos;
2620 ua->calgos = xt->calgos;
2621 ua->seq = x->km.seq = seq;
2622
1d1e34dd
DM		 2623 err = copy_to_user_tmpl(xp, skb);
2624 if (!err)
2625 err = copy_to_user_state_sec_ctx(x, skb);
2626 if (!err)
2627 err = copy_to_user_policy_type(xp->type, skb);
2628 if (!err)
2629 err = xfrm_mark_put(skb, &xp->mark);
2630 if (err) {
2631 nlmsg_cancel(skb, nlh);
2632 return err;
2633 }
1da177e4 2634
9825069d 2635 return nlmsg_end(skb, nlh);
1da177e4
LT		 2636}
2637
2638static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2639 struct xfrm_policy *xp)
1da177e4 2640{
a6483b79 2641 struct net *net = xs_net(x);
1da177e4 2642 struct sk_buff *skb;
1da177e4 2643
7deb2264 2644 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2645 if (skb == NULL)
2646 return -ENOMEM;
2647
65e0736b 2648 if (build_acquire(skb, x, xt, xp) < 0)
1da177e4
LT		 2649 BUG();
2650
a6483b79 2651 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2652}
2653
2654/* User gives us xfrm_user_policy_info followed by an array of 0
2655 * or more templates.
2656 */
cb969f07 2657static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2658 u8 *data, int len, int *dir)
2659{
fc34acd3 2660 struct net *net = sock_net(sk);
1da177e4
LT		 2661 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2662 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2663 struct xfrm_policy *xp;
2664 int nr;
2665
cb969f07 2666 switch (sk->sk_family) {
1da177e4
LT		 2667 case AF_INET:
2668 if (opt != IP_XFRM_POLICY) {
2669 *dir = -EOPNOTSUPP;
2670 return NULL;
2671 }
2672 break;
dfd56b8b 2673#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2674 case AF_INET6:
2675 if (opt != IPV6_XFRM_POLICY) {
2676 *dir = -EOPNOTSUPP;
2677 return NULL;
2678 }
2679 break;
2680#endif
2681 default:
2682 *dir = -EINVAL;
2683 return NULL;
2684 }
2685
2686 *dir = -EINVAL;
2687
2688 if (len < sizeof(*p) ||
2689 verify_newpolicy_info(p))
2690 return NULL;
2691
2692 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2693 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2694 return NULL;
2695
a4f1bac6
HX		 2696 if (p->dir > XFRM_POLICY_OUT)
2697 return NULL;
2698
2f09a4d5 2699 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2700 if (xp == NULL) {
2701 *dir = -ENOBUFS;
2702 return NULL;
2703 }
2704
2705 copy_from_user_policy(xp, p);
f7b6983f 2706 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2707 copy_templates(xp, ut, nr);
2708
2709 *dir = p->dir;
2710
2711 return xp;
2712}
2713
7deb2264
TG		 2714static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2715{
2716 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2717 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2718 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2719 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2720 + userpolicy_type_attrsize();
2721}
2722
1da177e4 2723static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2724 int dir, const struct km_event *c)
1da177e4
LT		 2725{
2726 struct xfrm_user_polexpire *upe;
d51d081d 2727 int hard = c->data.hard;
1d1e34dd
DM		 2728 struct nlmsghdr *nlh;
2729 int err;
1da177e4 2730
15e47304 2731 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2732 if (nlh == NULL)
2733 return -EMSGSIZE;
1da177e4 2734
7b67c857 2735 upe = nlmsg_data(nlh);
1da177e4 2736 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2737 err = copy_to_user_tmpl(xp, skb);
2738 if (!err)
2739 err = copy_to_user_sec_ctx(xp, skb);
2740 if (!err)
2741 err = copy_to_user_policy_type(xp->type, skb);
2742 if (!err)
2743 err = xfrm_mark_put(skb, &xp->mark);
2744 if (err) {
2745 nlmsg_cancel(skb, nlh);
2746 return err;
2747 }
1da177e4
LT		 2748 upe->hard = !!hard;
2749
9825069d 2750 return nlmsg_end(skb, nlh);
1da177e4
LT		 2751}
2752
214e005b 2753static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2754{
fc34acd3 2755 struct net *net = xp_net(xp);
1da177e4 2756 struct sk_buff *skb;
1da177e4 2757
7deb2264 2758 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2759 if (skb == NULL)
2760 return -ENOMEM;
2761
d51d081d 2762 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2763 BUG();
2764
a6483b79 2765 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2766}
2767
214e005b 2768static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2769{
1d1e34dd 2770 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 2771 struct net *net = xp_net(xp);
26b15dad 2772 struct xfrm_userpolicy_info *p;
0603eac0 2773 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2774 struct nlmsghdr *nlh;
2775 struct sk_buff *skb;
1d1e34dd 2776 int headlen, err;
0603eac0
HX		 2777
2778 headlen = sizeof(*p);
2779 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2780 len += nla_total_size(headlen);
0603eac0
HX		 2781 headlen = sizeof(*id);
2782 }
cfbfd45a 2783 len += userpolicy_type_attrsize();
295fae56 2784 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2785 len += NLMSG_ALIGN(headlen);
26b15dad 2786
7deb2264 2787 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2788 if (skb == NULL)
2789 return -ENOMEM;
26b15dad 2790
15e47304 2791 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2792 err = -EMSGSIZE;
79b8b7f4 2793 if (nlh == NULL)
1d1e34dd 2794 goto out_free_skb;
26b15dad 2795
7b67c857 2796 p = nlmsg_data(nlh);
0603eac0 2797 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2798 struct nlattr *attr;
2799
7b67c857 2800 id = nlmsg_data(nlh);
0603eac0
HX		 2801 memset(id, 0, sizeof(*id));
2802 id->dir = dir;
2803 if (c->data.byid)
2804 id->index = xp->index;
2805 else
2806 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2807
c0144bea 2808 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 2809 err = -EMSGSIZE;
c0144bea 2810 if (attr == NULL)
1d1e34dd 2811 goto out_free_skb;
c0144bea
TG		 2812
2813 p = nla_data(attr);
0603eac0 2814 }
26b15dad 2815
26b15dad 2816 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 2817 err = copy_to_user_tmpl(xp, skb);
2818 if (!err)
2819 err = copy_to_user_policy_type(xp->type, skb);
2820 if (!err)
2821 err = xfrm_mark_put(skb, &xp->mark);
2822 if (err)
2823 goto out_free_skb;
295fae56 2824
9825069d 2825 nlmsg_end(skb, nlh);
26b15dad 2826
a6483b79 2827 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2828
1d1e34dd 2829out_free_skb:
26b15dad 2830 kfree_skb(skb);
1d1e34dd 2831 return err;
26b15dad
JHS		 2832}
2833
214e005b 2834static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 2835{
7067802e 2836 struct net *net = c->net;
26b15dad
JHS		 2837 struct nlmsghdr *nlh;
2838 struct sk_buff *skb;
1d1e34dd 2839 int err;
26b15dad 2840
7deb2264 2841 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2842 if (skb == NULL)
2843 return -ENOMEM;
26b15dad 2844
15e47304 2845 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 2846 err = -EMSGSIZE;
79b8b7f4 2847 if (nlh == NULL)
1d1e34dd
DM		 2848 goto out_free_skb;
2849 err = copy_to_user_policy_type(c->data.type, skb);
2850 if (err)
2851 goto out_free_skb;
26b15dad 2852
9825069d 2853 nlmsg_end(skb, nlh);
26b15dad 2854
a6483b79 2855 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2856
1d1e34dd 2857out_free_skb:
26b15dad 2858 kfree_skb(skb);
1d1e34dd 2859 return err;
26b15dad
JHS		 2860}
2861
214e005b 2862static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2863{
2864
2865 switch (c->event) {
f60f6b8f
HX		 2866 case XFRM_MSG_NEWPOLICY:
2867 case XFRM_MSG_UPDPOLICY:
2868 case XFRM_MSG_DELPOLICY:
26b15dad 2869 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2870 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2871 return xfrm_notify_policy_flush(c);
f60f6b8f 2872 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2873 return xfrm_exp_policy_notify(xp, dir, c);
2874 default:
62db5cfd 2875 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2876 c->event);
26b15dad
JHS		 2877 }
2878
2879 return 0;
2880
2881}
2882
7deb2264
TG		 2883static inline size_t xfrm_report_msgsize(void)
2884{
2885 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2886}
2887
97a64b45
MN		 2888static int build_report(struct sk_buff *skb, u8 proto,
2889 struct xfrm_selector *sel, xfrm_address_t *addr)
2890{
2891 struct xfrm_user_report *ur;
2892 struct nlmsghdr *nlh;
97a64b45 2893
79b8b7f4
TG		 2894 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2895 if (nlh == NULL)
2896 return -EMSGSIZE;
97a64b45 2897
7b67c857 2898 ur = nlmsg_data(nlh);
97a64b45
MN		 2899 ur->proto = proto;
2900 memcpy(&ur->sel, sel, sizeof(ur->sel));
2901
1d1e34dd
DM		 2902 if (addr) {
2903 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2904 if (err) {
2905 nlmsg_cancel(skb, nlh);
2906 return err;
2907 }
2908 }
9825069d 2909 return nlmsg_end(skb, nlh);
97a64b45
MN		 2910}
2911
db983c11
AD		 2912static int xfrm_send_report(struct net *net, u8 proto,
2913 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2914{
2915 struct sk_buff *skb;
97a64b45 2916
7deb2264 2917 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2918 if (skb == NULL)
2919 return -ENOMEM;
2920
2921 if (build_report(skb, proto, sel, addr) < 0)
2922 BUG();
2923
a6483b79 2924 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2925}
2926
3a2dfbe8
MW		 2927static inline size_t xfrm_mapping_msgsize(void)
2928{
2929 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2930}
2931
2932static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2933 xfrm_address_t *new_saddr, __be16 new_sport)
2934{
2935 struct xfrm_user_mapping *um;
2936 struct nlmsghdr *nlh;
2937
2938 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2939 if (nlh == NULL)
2940 return -EMSGSIZE;
2941
2942 um = nlmsg_data(nlh);
2943
2944 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2945 um->id.spi = x->id.spi;
2946 um->id.family = x->props.family;
2947 um->id.proto = x->id.proto;
2948 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2949 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2950 um->new_sport = new_sport;
2951 um->old_sport = x->encap->encap_sport;
2952 um->reqid = x->props.reqid;
2953
2954 return nlmsg_end(skb, nlh);
2955}
2956
2957static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2958 __be16 sport)
2959{
a6483b79 2960 struct net *net = xs_net(x);
3a2dfbe8
MW		 2961 struct sk_buff *skb;
2962
2963 if (x->id.proto != IPPROTO_ESP)
2964 return -EINVAL;
2965
2966 if (!x->encap)
2967 return -EINVAL;
2968
2969 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2970 if (skb == NULL)
2971 return -ENOMEM;
2972
2973 if (build_mapping(skb, x, ipaddr, sport) < 0)
2974 BUG();
2975
a6483b79 2976 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2977}
2978
1da177e4
LT		 2979static struct xfrm_mgr netlink_mgr = {
2980 .id = "netlink",
2981 .notify = xfrm_send_state_notify,
2982 .acquire = xfrm_send_acquire,
2983 .compile_policy = xfrm_compile_policy,
2984 .notify_policy = xfrm_send_policy_notify,
97a64b45 2985 .report = xfrm_send_report,
5c79de6e 2986 .migrate = xfrm_send_migrate,
3a2dfbe8 2987 .new_mapping = xfrm_send_mapping,
1da177e4
LT		 2988};
2989
a6483b79 2990static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 2991{
be33690d 2992 struct sock *nlsk;
a31f2d17
PNA		 2993 struct netlink_kernel_cfg cfg = {
2994 .groups = XFRMNLGRP_MAX,
2995 .input = xfrm_netlink_rcv,
2996 };
be33690d 2997
9f00d977 2998 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 2999 if (nlsk == NULL)
1da177e4 3000 return -ENOMEM;
d79d792e 3001 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3002 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3003 return 0;
3004}
3005
d79d792e 3006static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3007{
d79d792e
EB		 3008 struct net *net;
3009 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3010 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3011 synchronize_net();
3012 list_for_each_entry(net, net_exit_list, exit_list)
3013 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3014}
3015
a6483b79 3016static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3017 .init = xfrm_user_net_init,
3018 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3019};
3020
3021static int __init xfrm_user_init(void)
3022{
3023 int rv;
3024
3025 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3026
3027 rv = register_pernet_subsys(&xfrm_user_net_ops);
3028 if (rv < 0)
3029 return rv;
3030 rv = xfrm_register_km(&netlink_mgr);
3031 if (rv < 0)
3032 unregister_pernet_subsys(&xfrm_user_net_ops);
3033 return rv;
3034}
3035
3036static void __exit xfrm_user_exit(void)
3037{
3038 xfrm_unregister_km(&netlink_mgr);
3039 unregister_pernet_subsys(&xfrm_user_net_ops);
3040}
3041
1da177e4
LT		 3042module_init(xfrm_user_init);
3043module_exit(xfrm_user_exit);
3044MODULE_LICENSE("GPL");
4fdb3bb7 3045MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3046
Linux kernel - Deliverables
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