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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux.git] / net / xfrm / xfrm_user.c
CommitLineData
09c434b8 1// SPDX-License-Identifier: GPL-2.0-only
1da177e4
LT		 2/* xfrm_user.c: User interface to configure xfrm engine.
3 *
4 * Copyright (C) 2002 David S. Miller ([email protected])
5 *
6 * Changes:
7 * Mitsuru KANDA @USAGI
8 * Kazunori MIYAZAWA @USAGI
9 * Kunihiro Ishiguro <[email protected]>
10 * IPv6 support
df71837d 11 *
1da177e4
LT		 12 */
13
9409f38a 14#include <linux/crypto.h>
1da177e4
LT		 15#include <linux/module.h>
16#include <linux/kernel.h>
17#include <linux/types.h>
18#include <linux/slab.h>
19#include <linux/socket.h>
20#include <linux/string.h>
21#include <linux/net.h>
22#include <linux/skbuff.h>
1da177e4
LT		 23#include <linux/pfkeyv2.h>
24#include <linux/ipsec.h>
25#include <linux/init.h>
26#include <linux/security.h>
27#include <net/sock.h>
28#include <net/xfrm.h>
88fc2c84 29#include <net/netlink.h>
fa6dd8a2 30#include <net/ah.h>
7c0f6ba6 31#include <linux/uaccess.h>
dfd56b8b 32#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 33#include <linux/in6.h>
34#endif
e33d4f13 35#include <asm/unaligned.h>
1da177e4 36
5424f32e 37static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 38{
5424f32e 39 struct nlattr *rt = attrs[type];
1da177e4
LT		 40 struct xfrm_algo *algp;
41
42 if (!rt)
43 return 0;
44
5424f32e 45 algp = nla_data(rt);
06cd22f8 46 if (nla_len(rt) < (int)xfrm_alg_len(algp))
31c26852
HX		 47 return -EINVAL;
48
1da177e4
LT		 49 switch (type) {
50 case XFRMA_ALG_AUTH:
1da177e4 51 case XFRMA_ALG_CRYPT:
1da177e4 52 case XFRMA_ALG_COMP:
1da177e4
LT		 53 break;
54
55 default:
56 return -EINVAL;
3ff50b79 57 }
1da177e4 58
633439f5 59 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
1da177e4
LT		 60 return 0;
61}
62
4447bb33
MW		 63static int verify_auth_trunc(struct nlattr **attrs)
64{
65 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
66 struct xfrm_algo_auth *algp;
67
68 if (!rt)
69 return 0;
70
71 algp = nla_data(rt);
1bd963a7 72 if (nla_len(rt) < (int)xfrm_alg_auth_len(algp))
4447bb33
MW		 73 return -EINVAL;
74
633439f5 75 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
4447bb33
MW		 76 return 0;
77}
78
1a6509d9
HX		 79static int verify_aead(struct nlattr **attrs)
80{
81 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
82 struct xfrm_algo_aead *algp;
83
84 if (!rt)
85 return 0;
86
87 algp = nla_data(rt);
373b8eeb 88 if (nla_len(rt) < (int)aead_len(algp))
1a6509d9
HX		 89 return -EINVAL;
90
633439f5 91 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
1a6509d9
HX		 92 return 0;
93}
94
5424f32e 95static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 96 xfrm_address_t **addrp)
97{
5424f32e 98 struct nlattr *rt = attrs[type];
eb2971b6 99
cf5cb79f 100 if (rt && addrp)
5424f32e 101 *addrp = nla_data(rt);
eb2971b6 102}
df71837d 103
5424f32e 104static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 105{
5424f32e 106 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 107 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 108
109 if (!rt)
110 return 0;
111
5424f32e 112 uctx = nla_data(rt);
171d449a
XL		 113 if (uctx->len > nla_len(rt) ||
114 uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 115 return -EINVAL;
116
117 return 0;
118}
119
d8647b79
SK		 120static inline int verify_replay(struct xfrm_usersa_info *p,
121 struct nlattr **attrs)
122{
123 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
ecd79187 124 struct xfrm_replay_state_esn *rs;
d8647b79 125
d97ca5d7
FW		 126 if (!rt)
127 return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0;
ecd79187 128
d97ca5d7 129 rs = nla_data(rt);
ecd79187 130
d97ca5d7
FW		 131 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
132 return -EINVAL;
7833aa05 133
d97ca5d7
FW		 134 if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
135 nla_len(rt) != sizeof(*rs))
136 return -EINVAL;
d8647b79 137
01714109
FD		 138 /* As only ESP and AH support ESN feature. */
139 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
02aadf72
SK		 140 return -EINVAL;
141
d8647b79
SK		 142 if (p->replay_window != 0)
143 return -EINVAL;
144
145 return 0;
146}
df71837d 147
1da177e4 148static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 149 struct nlattr **attrs)
1da177e4
LT		 150{
151 int err;
152
153 err = -EINVAL;
154 switch (p->family) {
b38ff407
AG		 155 case AF_INET:
156 break;
157
158 case AF_INET6:
159#if IS_ENABLED(CONFIG_IPV6)
160 break;
161#else
162 err = -EAFNOSUPPORT;
163 goto out;
164#endif
165
166 default:
167 goto out;
168 }
169
170 switch (p->sel.family) {
b8d6d007
ND		 171 case AF_UNSPEC:
172 break;
173
1da177e4 174 case AF_INET:
07bf7908
SK		 175 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
176 goto out;
177
1da177e4
LT		 178 break;
179
180 case AF_INET6:
dfd56b8b 181#if IS_ENABLED(CONFIG_IPV6)
07bf7908
SK		 182 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
183 goto out;
184
1da177e4
LT		 185 break;
186#else
187 err = -EAFNOSUPPORT;
188 goto out;
189#endif
190
191 default:
192 goto out;
3ff50b79 193 }
1da177e4
LT		 194
195 err = -EINVAL;
196 switch (p->id.proto) {
197 case IPPROTO_AH:
4447bb33
MW		 198 if ((!attrs[XFRMA_ALG_AUTH] &&
199 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 200 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 201 attrs[XFRMA_ALG_CRYPT] ||
35d2856b 202 attrs[XFRMA_ALG_COMP] ||
a0e5ef53 203 attrs[XFRMA_TFCPAD])
1da177e4
LT		 204 goto out;
205 break;
206
207 case IPPROTO_ESP:
1a6509d9
HX		 208 if (attrs[XFRMA_ALG_COMP])
209 goto out;
210 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 211 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 212 !attrs[XFRMA_ALG_CRYPT] &&
213 !attrs[XFRMA_ALG_AEAD])
214 goto out;
215 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 216 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 217 attrs[XFRMA_ALG_CRYPT]) &&
218 attrs[XFRMA_ALG_AEAD])
1da177e4 219 goto out;
35d2856b
MW		 220 if (attrs[XFRMA_TFCPAD] &&
221 p->mode != XFRM_MODE_TUNNEL)
222 goto out;
1da177e4
LT		 223 break;
224
225 case IPPROTO_COMP:
35a7aa08 226 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 227 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 228 attrs[XFRMA_ALG_AUTH] ||
4447bb33 229 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b 230 attrs[XFRMA_ALG_CRYPT] ||
a0e5ef53
TB		 231 attrs[XFRMA_TFCPAD] ||
232 (ntohl(p->id.spi) >= 0x10000))
1da177e4
LT		 233 goto out;
234 break;
235
dfd56b8b 236#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 237 case IPPROTO_DSTOPTS:
238 case IPPROTO_ROUTING:
35a7aa08
TG		 239 if (attrs[XFRMA_ALG_COMP] ||
240 attrs[XFRMA_ALG_AUTH] ||
4447bb33 241 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 242 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 243 attrs[XFRMA_ALG_CRYPT] ||
244 attrs[XFRMA_ENCAP] ||
245 attrs[XFRMA_SEC_CTX] ||
35d2856b 246 attrs[XFRMA_TFCPAD] ||
35a7aa08 247 !attrs[XFRMA_COADDR])
e23c7194
MN		 248 goto out;
249 break;
250#endif
251
1da177e4
LT		 252 default:
253 goto out;
3ff50b79 254 }
1da177e4 255
1a6509d9
HX		 256 if ((err = verify_aead(attrs)))
257 goto out;
4447bb33
MW		 258 if ((err = verify_auth_trunc(attrs)))
259 goto out;
35a7aa08 260 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 261 goto out;
35a7aa08 262 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 263 goto out;
35a7aa08 264 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 265 goto out;
35a7aa08 266 if ((err = verify_sec_ctx_len(attrs)))
df71837d 267 goto out;
d8647b79
SK		 268 if ((err = verify_replay(p, attrs)))
269 goto out;
1da177e4
LT		 270
271 err = -EINVAL;
272 switch (p->mode) {
7e49e6de
MN		 273 case XFRM_MODE_TRANSPORT:
274 case XFRM_MODE_TUNNEL:
060f02a3 275 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 276 case XFRM_MODE_BEET:
1da177e4
LT		 277 break;
278
279 default:
280 goto out;
3ff50b79 281 }
1da177e4
LT		 282
283 err = 0;
284
285out:
286 return err;
287}
288
289static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 290 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 291 struct nlattr *rta)
1da177e4 292{
1da177e4
LT		 293 struct xfrm_algo *p, *ualg;
294 struct xfrm_algo_desc *algo;
295
296 if (!rta)
297 return 0;
298
5424f32e 299 ualg = nla_data(rta);
1da177e4
LT		 300
301 algo = get_byname(ualg->alg_name, 1);
302 if (!algo)
303 return -ENOSYS;
304 *props = algo->desc.sadb_alg_id;
305
0f99be0d 306 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 307 if (!p)
308 return -ENOMEM;
309
04ff1260 310 strcpy(p->alg_name, algo->name);
1da177e4
LT		 311 *algpp = p;
312 return 0;
313}
314
69b0137f
HX		 315static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
316{
317 struct xfrm_algo *p, *ualg;
318 struct xfrm_algo_desc *algo;
319
320 if (!rta)
321 return 0;
322
323 ualg = nla_data(rta);
324
325 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
326 if (!algo)
327 return -ENOSYS;
328 x->props.ealgo = algo->desc.sadb_alg_id;
329
330 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
331 if (!p)
332 return -ENOMEM;
333
334 strcpy(p->alg_name, algo->name);
335 x->ealg = p;
336 x->geniv = algo->uinfo.encr.geniv;
337 return 0;
338}
339
4447bb33
MW		 340static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
341 struct nlattr *rta)
342{
343 struct xfrm_algo *ualg;
344 struct xfrm_algo_auth *p;
345 struct xfrm_algo_desc *algo;
346
347 if (!rta)
348 return 0;
349
350 ualg = nla_data(rta);
351
352 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
353 if (!algo)
354 return -ENOSYS;
355 *props = algo->desc.sadb_alg_id;
356
357 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
358 if (!p)
359 return -ENOMEM;
360
361 strcpy(p->alg_name, algo->name);
362 p->alg_key_len = ualg->alg_key_len;
363 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
364 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
365
366 *algpp = p;
367 return 0;
368}
369
370static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
371 struct nlattr *rta)
372{
373 struct xfrm_algo_auth *p, *ualg;
374 struct xfrm_algo_desc *algo;
375
376 if (!rta)
377 return 0;
378
379 ualg = nla_data(rta);
380
381 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
382 if (!algo)
383 return -ENOSYS;
689f1c9d 384 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 385 return -EINVAL;
386 *props = algo->desc.sadb_alg_id;
387
388 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
389 if (!p)
390 return -ENOMEM;
391
392 strcpy(p->alg_name, algo->name);
393 if (!p->alg_trunc_len)
394 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
395
396 *algpp = p;
397 return 0;
398}
399
69b0137f 400static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
1a6509d9
HX		 401{
402 struct xfrm_algo_aead *p, *ualg;
403 struct xfrm_algo_desc *algo;
404
405 if (!rta)
406 return 0;
407
408 ualg = nla_data(rta);
409
410 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
411 if (!algo)
412 return -ENOSYS;
69b0137f 413 x->props.ealgo = algo->desc.sadb_alg_id;
1a6509d9
HX		 414
415 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
416 if (!p)
417 return -ENOMEM;
418
419 strcpy(p->alg_name, algo->name);
69b0137f
HX		 420 x->aead = p;
421 x->geniv = algo->uinfo.aead.geniv;
1a6509d9
HX		 422 return 0;
423}
424
e2b19125
SK		 425static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
426 struct nlattr *rp)
427{
428 struct xfrm_replay_state_esn *up;
5e708e47 429 unsigned int ulen;
e2b19125
SK		 430
431 if (!replay_esn || !rp)
432 return 0;
433
434 up = nla_data(rp);
ecd79187 435 ulen = xfrm_replay_state_esn_len(up);
e2b19125 436
f843ee6d
AW		 437 /* Check the overall length and the internal bitmap length to avoid
438 * potential overflow. */
5e708e47 439 if (nla_len(rp) < (int)ulen ||
f843ee6d
AW		 440 xfrm_replay_state_esn_len(replay_esn) != ulen ||
441 replay_esn->bmp_len != up->bmp_len)
e2b19125
SK		 442 return -EINVAL;
443
677e806d
AW		 444 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
445 return -EINVAL;
446
e2b19125
SK		 447 return 0;
448}
449
d8647b79
SK		 450static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
451 struct xfrm_replay_state_esn **preplay_esn,
452 struct nlattr *rta)
453{
454 struct xfrm_replay_state_esn *p, *pp, *up;
5e708e47 455 unsigned int klen, ulen;
d8647b79
SK		 456
457 if (!rta)
458 return 0;
459
460 up = nla_data(rta);
ecd79187 461 klen = xfrm_replay_state_esn_len(up);
5e708e47 462 ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);
d8647b79 463
ecd79187 464 p = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 465 if (!p)
466 return -ENOMEM;
467
ecd79187 468 pp = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 469 if (!pp) {
470 kfree(p);
471 return -ENOMEM;
472 }
473
ecd79187
MK		 474 memcpy(p, up, ulen);
475 memcpy(pp, up, ulen);
476
d8647b79
SK		 477 *replay_esn = p;
478 *preplay_esn = pp;
479
480 return 0;
481}
482
a1b831f2 483static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 484{
a1b831f2 485 unsigned int len = 0;
df71837d
TJ		 486
487 if (xfrm_ctx) {
488 len += sizeof(struct xfrm_user_sec_ctx);
489 len += xfrm_ctx->ctx_len;
490 }
491 return len;
492}
493
1da177e4
LT		 494static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
495{
496 memcpy(&x->id, &p->id, sizeof(x->id));
497 memcpy(&x->sel, &p->sel, sizeof(x->sel));
498 memcpy(&x->lft, &p->lft, sizeof(x->lft));
499 x->props.mode = p->mode;
33fce60d
FD		 500 x->props.replay_window = min_t(unsigned int, p->replay_window,
501 sizeof(x->replay.bitmap) * 8);
1da177e4
LT		 502 x->props.reqid = p->reqid;
503 x->props.family = p->family;
54489c14 504 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 505 x->props.flags = p->flags;
196b0036 506
ccf9b3b8 507 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 508 x->sel.family = p->family;
1da177e4
LT		 509}
510
d51d081d
JHS		 511/*
512 * someday when pfkey also has support, we could have the code
513 * somehow made shareable and move it to xfrm_state.c - JHS
514 *
515*/
e3ac104d
MK		 516static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
517 int update_esn)
d51d081d 518{
5424f32e 519 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
e3ac104d 520 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
5424f32e
TG		 521 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
522 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
523 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 524
d8647b79
SK		 525 if (re) {
526 struct xfrm_replay_state_esn *replay_esn;
527 replay_esn = nla_data(re);
528 memcpy(x->replay_esn, replay_esn,
529 xfrm_replay_state_esn_len(replay_esn));
530 memcpy(x->preplay_esn, replay_esn,
531 xfrm_replay_state_esn_len(replay_esn));
532 }
533
d51d081d
JHS		 534 if (rp) {
535 struct xfrm_replay_state *replay;
5424f32e 536 replay = nla_data(rp);
d51d081d
JHS		 537 memcpy(&x->replay, replay, sizeof(*replay));
538 memcpy(&x->preplay, replay, sizeof(*replay));
539 }
540
541 if (lt) {
542 struct xfrm_lifetime_cur *ltime;
5424f32e 543 ltime = nla_data(lt);
d51d081d
JHS		 544 x->curlft.bytes = ltime->bytes;
545 x->curlft.packets = ltime->packets;
546 x->curlft.add_time = ltime->add_time;
547 x->curlft.use_time = ltime->use_time;
548 }
549
cf5cb79f 550 if (et)
5424f32e 551 x->replay_maxage = nla_get_u32(et);
d51d081d 552
cf5cb79f 553 if (rt)
5424f32e 554 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 555}
556
9b42c1f1
SK		 557static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
558{
559 if (attrs[XFRMA_SET_MARK]) {
560 m->v = nla_get_u32(attrs[XFRMA_SET_MARK]);
561 if (attrs[XFRMA_SET_MARK_MASK])
562 m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]);
563 else
564 m->m = 0xffffffff;
565 } else {
566 m->v = m->m = 0;
567 }
568}
569
fc34acd3
AD		 570static struct xfrm_state *xfrm_state_construct(struct net *net,
571 struct xfrm_usersa_info *p,
5424f32e 572 struct nlattr **attrs,
1da177e4
LT		 573 int *errp)
574{
fc34acd3 575 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 576 int err = -ENOMEM;
577
578 if (!x)
579 goto error_no_put;
580
581 copy_from_user_state(x, p);
582
6fd06963
SK		 583 if (attrs[XFRMA_ENCAP]) {
584 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
585 sizeof(*x->encap), GFP_KERNEL);
586 if (x->encap == NULL)
587 goto error;
588 }
589
590 if (attrs[XFRMA_COADDR]) {
591 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
592 sizeof(*x->coaddr), GFP_KERNEL);
593 if (x->coaddr == NULL)
594 goto error;
595 }
596
a947b0a9
ND		 597 if (attrs[XFRMA_SA_EXTRA_FLAGS])
598 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
599
69b0137f 600 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
1a6509d9 601 goto error;
4447bb33
MW		 602 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
603 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 604 goto error;
4447bb33
MW		 605 if (!x->props.aalgo) {
606 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
607 attrs[XFRMA_ALG_AUTH])))
608 goto error;
609 }
69b0137f 610 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 611 goto error;
612 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
613 xfrm_calg_get_byname,
35a7aa08 614 attrs[XFRMA_ALG_COMP])))
1da177e4 615 goto error;
fd21150a 616
35d2856b
MW		 617 if (attrs[XFRMA_TFCPAD])
618 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
619
6f26b61e
JHS		 620 xfrm_mark_get(attrs, &x->mark);
621
9b42c1f1 622 xfrm_smark_init(attrs, &x->props.smark);
077fbac4 623
7e652640
SK		 624 if (attrs[XFRMA_IF_ID])
625 x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
077fbac4 626
ffdb5211 627 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
1da177e4
LT		 628 if (err)
629 goto error;
630
2f30ea50
MK		 631 if (attrs[XFRMA_SEC_CTX]) {
632 err = security_xfrm_state_alloc(x,
633 nla_data(attrs[XFRMA_SEC_CTX]));
634 if (err)
635 goto error;
636 }
df71837d 637
d8647b79
SK		 638 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
639 attrs[XFRMA_REPLAY_ESN_VAL])))
640 goto error;
641
1da177e4 642 x->km.seq = p->seq;
b27aeadb 643 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 644 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 645 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 646
9fdc4883
SK		 647 if ((err = xfrm_init_replay(x)))
648 goto error;
d51d081d 649
9fdc4883 650 /* override default values from above */
e3ac104d 651 xfrm_update_ae_params(x, attrs, 0);
1da177e4 652
cc01572e
YK		 653 /* configure the hardware if offload is requested */
654 if (attrs[XFRMA_OFFLOAD_DEV]) {
655 err = xfrm_dev_state_add(net, x,
656 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
657 if (err)
658 goto error;
659 }
660
1da177e4
LT		 661 return x;
662
663error:
664 x->km.state = XFRM_STATE_DEAD;
665 xfrm_state_put(x);
666error_no_put:
667 *errp = err;
668 return NULL;
669}
670
22e70050 671static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 672 struct nlattr **attrs)
1da177e4 673{
fc34acd3 674 struct net *net = sock_net(skb->sk);
7b67c857 675 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 676 struct xfrm_state *x;
677 int err;
26b15dad 678 struct km_event c;
1da177e4 679
35a7aa08 680 err = verify_newsa_info(p, attrs);
1da177e4
LT		 681 if (err)
682 return err;
683
fc34acd3 684 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 685 if (!x)
686 return err;
687
26b15dad 688 xfrm_state_hold(x);
1da177e4
LT		 689 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
690 err = xfrm_state_add(x);
691 else
692 err = xfrm_state_update(x);
693
2e71029e 694 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 695
1da177e4
LT		 696 if (err < 0) {
697 x->km.state = XFRM_STATE_DEAD;
c5d4d7d8 698 xfrm_dev_state_delete(x);
21380b81 699 __xfrm_state_put(x);
7d6dfe1f 700 goto out;
1da177e4
LT		 701 }
702
cc01572e
YK		 703 if (x->km.state == XFRM_STATE_VOID)
704 x->km.state = XFRM_STATE_VALID;
705
26b15dad 706 c.seq = nlh->nlmsg_seq;
15e47304 707 c.portid = nlh->nlmsg_pid;
f60f6b8f 708 c.event = nlh->nlmsg_type;
26b15dad
JHS		 709
710 km_state_notify(x, &c);
7d6dfe1f 711out:
26b15dad 712 xfrm_state_put(x);
1da177e4
LT		 713 return err;
714}
715
fc34acd3
AD		 716static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
717 struct xfrm_usersa_id *p,
5424f32e 718 struct nlattr **attrs,
eb2971b6
MN		 719 int *errp)
720{
721 struct xfrm_state *x = NULL;
6f26b61e 722 struct xfrm_mark m;
eb2971b6 723 int err;
6f26b61e 724 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 725
726 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
727 err = -ESRCH;
6f26b61e 728 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 729 } else {
730 xfrm_address_t *saddr = NULL;
731
35a7aa08 732 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 733 if (!saddr) {
734 err = -EINVAL;
735 goto out;
736 }
737
9abbffee 738 err = -ESRCH;
6f26b61e
JHS		 739 x = xfrm_state_lookup_byaddr(net, mark,
740 &p->daddr, saddr,
221df1ed 741 p->proto, p->family);
eb2971b6
MN		 742 }
743
744 out:
745 if (!x && errp)
746 *errp = err;
747 return x;
748}
749
22e70050 750static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 751 struct nlattr **attrs)
1da177e4 752{
fc34acd3 753 struct net *net = sock_net(skb->sk);
1da177e4 754 struct xfrm_state *x;
eb2971b6 755 int err = -ESRCH;
26b15dad 756 struct km_event c;
7b67c857 757 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4 758
fc34acd3 759 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 760 if (x == NULL)
eb2971b6 761 return err;
1da177e4 762
6f68dc37 763 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 764 goto out;
765
1da177e4 766 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 767 err = -EPERM;
768 goto out;
1da177e4
LT		 769 }
770
26b15dad 771 err = xfrm_state_delete(x);
161a09e7 772
c8c05a8e
CZ		 773 if (err < 0)
774 goto out;
26b15dad
JHS		 775
776 c.seq = nlh->nlmsg_seq;
15e47304 777 c.portid = nlh->nlmsg_pid;
f60f6b8f 778 c.event = nlh->nlmsg_type;
26b15dad 779 km_state_notify(x, &c);
1da177e4 780
c8c05a8e 781out:
2e71029e 782 xfrm_audit_state_delete(x, err ? 0 : 1, true);
c8c05a8e 783 xfrm_state_put(x);
26b15dad 784 return err;
1da177e4
LT		 785}
786
787static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
788{
f778a636 789 memset(p, 0, sizeof(*p));
1da177e4
LT		 790 memcpy(&p->id, &x->id, sizeof(p->id));
791 memcpy(&p->sel, &x->sel, sizeof(p->sel));
792 memcpy(&p->lft, &x->lft, sizeof(p->lft));
793 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
e33d4f13
SV		 794 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
795 put_unaligned(x->stats.replay, &p->stats.replay);
796 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
54489c14 797 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 798 p->mode = x->props.mode;
799 p->replay_window = x->props.replay_window;
800 p->reqid = x->props.reqid;
801 p->family = x->props.family;
802 p->flags = x->props.flags;
803 p->seq = x->km.seq;
804}
805
806struct xfrm_dump_info {
807 struct sk_buff *in_skb;
808 struct sk_buff *out_skb;
809 u32 nlmsg_seq;
810 u16 nlmsg_flags;
1da177e4
LT		 811};
812
c0144bea
TG		 813static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
814{
c0144bea
TG		 815 struct xfrm_user_sec_ctx *uctx;
816 struct nlattr *attr;
68325d3b 817 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 818
819 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
820 if (attr == NULL)
821 return -EMSGSIZE;
822
823 uctx = nla_data(attr);
824 uctx->exttype = XFRMA_SEC_CTX;
825 uctx->len = ctx_size;
826 uctx->ctx_doi = s->ctx_doi;
827 uctx->ctx_alg = s->ctx_alg;
828 uctx->ctx_len = s->ctx_len;
829 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
830
831 return 0;
832}
833
d77e38e6
SK		 834static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
835{
836 struct xfrm_user_offload *xuo;
837 struct nlattr *attr;
838
839 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
840 if (attr == NULL)
841 return -EMSGSIZE;
842
843 xuo = nla_data(attr);
5fe0d4bd 844 memset(xuo, 0, sizeof(*xuo));
d77e38e6
SK		 845 xuo->ifindex = xso->dev->ifindex;
846 xuo->flags = xso->flags;
847
848 return 0;
849}
850
c7a5899e
AA		 851static bool xfrm_redact(void)
852{
853 return IS_ENABLED(CONFIG_SECURITY) &&
854 security_locked_down(LOCKDOWN_XFRM_SECRET);
855}
856
4447bb33
MW		 857static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
858{
859 struct xfrm_algo *algo;
c7a5899e 860 struct xfrm_algo_auth *ap;
4447bb33 861 struct nlattr *nla;
c7a5899e 862 bool redact_secret = xfrm_redact();
4447bb33
MW		 863
864 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
865 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
866 if (!nla)
867 return -EMSGSIZE;
4447bb33 868 algo = nla_data(nla);
4c87308b 869 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
c7a5899e
AA		 870
871 if (redact_secret && auth->alg_key_len)
872 memset(algo->alg_key, 0, (auth->alg_key_len + 7) / 8);
873 else
874 memcpy(algo->alg_key, auth->alg_key,
875 (auth->alg_key_len + 7) / 8);
4447bb33
MW		 876 algo->alg_key_len = auth->alg_key_len;
877
c7a5899e
AA		 878 nla = nla_reserve(skb, XFRMA_ALG_AUTH_TRUNC, xfrm_alg_auth_len(auth));
879 if (!nla)
880 return -EMSGSIZE;
881 ap = nla_data(nla);
882 memcpy(ap, auth, sizeof(struct xfrm_algo_auth));
883 if (redact_secret && auth->alg_key_len)
884 memset(ap->alg_key, 0, (auth->alg_key_len + 7) / 8);
885 else
886 memcpy(ap->alg_key, auth->alg_key,
887 (auth->alg_key_len + 7) / 8);
888 return 0;
889}
890
891static int copy_to_user_aead(struct xfrm_algo_aead *aead, struct sk_buff *skb)
892{
893 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_AEAD, aead_len(aead));
894 struct xfrm_algo_aead *ap;
895 bool redact_secret = xfrm_redact();
896
897 if (!nla)
898 return -EMSGSIZE;
899
900 ap = nla_data(nla);
901 memcpy(ap, aead, sizeof(*aead));
902
903 if (redact_secret && aead->alg_key_len)
904 memset(ap->alg_key, 0, (aead->alg_key_len + 7) / 8);
905 else
906 memcpy(ap->alg_key, aead->alg_key,
907 (aead->alg_key_len + 7) / 8);
908 return 0;
909}
910
911static int copy_to_user_ealg(struct xfrm_algo *ealg, struct sk_buff *skb)
912{
913 struct xfrm_algo *ap;
914 bool redact_secret = xfrm_redact();
915 struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_CRYPT,
916 xfrm_alg_len(ealg));
917 if (!nla)
918 return -EMSGSIZE;
919
920 ap = nla_data(nla);
921 memcpy(ap, ealg, sizeof(*ealg));
922
923 if (redact_secret && ealg->alg_key_len)
924 memset(ap->alg_key, 0, (ealg->alg_key_len + 7) / 8);
925 else
926 memcpy(ap->alg_key, ealg->alg_key,
927 (ealg->alg_key_len + 7) / 8);
928
4447bb33
MW		 929 return 0;
930}
931
9b42c1f1
SK		 932static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
933{
934 int ret = 0;
935
936 if (m->v | m->m) {
937 ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v);
938 if (!ret)
939 ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m);
940 }
941 return ret;
942}
943
68325d3b
HX		 944/* Don't change this without updating xfrm_sa_len! */
945static int copy_to_user_state_extra(struct xfrm_state *x,
946 struct xfrm_usersa_info *p,
947 struct sk_buff *skb)
1da177e4 948{
1d1e34dd 949 int ret = 0;
d0fde795 950
1d1e34dd 951 copy_to_user_state(x, p);
68325d3b 952
a947b0a9
ND		 953 if (x->props.extra_flags) {
954 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
955 x->props.extra_flags);
956 if (ret)
957 goto out;
958 }
959
1d1e34dd
DM		 960 if (x->coaddr) {
961 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
962 if (ret)
963 goto out;
964 }
965 if (x->lastused) {
de95c4a4
ND		 966 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
967 XFRMA_PAD);
1d1e34dd
DM		 968 if (ret)
969 goto out;
970 }
971 if (x->aead) {
c7a5899e 972 ret = copy_to_user_aead(x->aead, skb);
1d1e34dd
DM		 973 if (ret)
974 goto out;
975 }
976 if (x->aalg) {
977 ret = copy_to_user_auth(x->aalg, skb);
1d1e34dd
DM		 978 if (ret)
979 goto out;
980 }
981 if (x->ealg) {
c7a5899e 982 ret = copy_to_user_ealg(x->ealg, skb);
1d1e34dd
DM		 983 if (ret)
984 goto out;
985 }
986 if (x->calg) {
987 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
988 if (ret)
989 goto out;
990 }
991 if (x->encap) {
992 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
993 if (ret)
994 goto out;
995 }
996 if (x->tfcpad) {
997 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
998 if (ret)
999 goto out;
1000 }
1001 ret = xfrm_mark_put(skb, &x->mark);
1002 if (ret)
1003 goto out;
9b42c1f1
SK		 1004
1005 ret = xfrm_smark_put(skb, &x->props.smark);
1006 if (ret)
1007 goto out;
1008
f293a5e3 1009 if (x->replay_esn)
1d1e34dd
DM		 1010 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1011 xfrm_replay_state_esn_len(x->replay_esn),
1012 x->replay_esn);
f293a5e3 1013 else
1014 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1015 &x->replay);
1016 if (ret)
1017 goto out;
d77e38e6
SK		 1018 if(x->xso.dev)
1019 ret = copy_user_offload(&x->xso, skb);
1020 if (ret)
1021 goto out;
7e652640
SK		 1022 if (x->if_id) {
1023 ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id);
077fbac4
LC		 1024 if (ret)
1025 goto out;
1026 }
8598112d
SK		 1027 if (x->security)
1028 ret = copy_sec_ctx(x->security, skb);
1d1e34dd
DM		 1029out:
1030 return ret;
68325d3b
HX		 1031}
1032
1033static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
1034{
1035 struct xfrm_dump_info *sp = ptr;
1036 struct sk_buff *in_skb = sp->in_skb;
1037 struct sk_buff *skb = sp->out_skb;
5f3eea6b 1038 struct xfrm_translator *xtr;
68325d3b
HX		 1039 struct xfrm_usersa_info *p;
1040 struct nlmsghdr *nlh;
1041 int err;
1042
15e47304 1043 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 1044 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
1045 if (nlh == NULL)
1046 return -EMSGSIZE;
1047
1048 p = nlmsg_data(nlh);
1049
1050 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 1051 if (err) {
1052 nlmsg_cancel(skb, nlh);
1053 return err;
1054 }
9825069d 1055 nlmsg_end(skb, nlh);
5f3eea6b
DS		 1056
1057 xtr = xfrm_get_translator();
1058 if (xtr) {
1059 err = xtr->alloc_compat(skb, nlh);
1060
1061 xfrm_put_translator(xtr);
1062 if (err) {
1063 nlmsg_cancel(skb, nlh);
1064 return err;
1065 }
1066 }
1067
1da177e4 1068 return 0;
1da177e4
LT		 1069}
1070
4c563f76
TT		 1071static int xfrm_dump_sa_done(struct netlink_callback *cb)
1072{
1073 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 1074 struct sock *sk = cb->skb->sk;
1075 struct net *net = sock_net(sk);
1076
1ba5bf99
VN		 1077 if (cb->args[0])
1078 xfrm_state_walk_done(walk, net);
4c563f76
TT		 1079 return 0;
1080}
1081
1da177e4
LT		 1082static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
1083{
fc34acd3 1084 struct net *net = sock_net(skb->sk);
4c563f76 1085 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 1086 struct xfrm_dump_info info;
1087
4c563f76
TT		 1088 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
1089 sizeof(cb->args) - sizeof(cb->args[0]));
1090
1da177e4
LT		 1091 info.in_skb = cb->skb;
1092 info.out_skb = skb;
1093 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1094 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1095
1096 if (!cb->args[0]) {
d3623099 1097 struct nlattr *attrs[XFRMA_MAX+1];
870a2df4 1098 struct xfrm_address_filter *filter = NULL;
d3623099
ND		 1099 u8 proto = 0;
1100 int err;
1101
8cb08174
JB		 1102 err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX,
1103 xfrma_policy, cb->extack);
d3623099
ND		 1104 if (err < 0)
1105 return err;
1106
870a2df4 1107 if (attrs[XFRMA_ADDRESS_FILTER]) {
df367561
AH		 1108 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
1109 sizeof(*filter), GFP_KERNEL);
d3623099
ND		 1110 if (filter == NULL)
1111 return -ENOMEM;
d3623099
ND		 1112 }
1113
1114 if (attrs[XFRMA_PROTO])
1115 proto = nla_get_u8(attrs[XFRMA_PROTO]);
1116
1117 xfrm_state_walk_init(walk, proto, filter);
1ba5bf99 1118 cb->args[0] = 1;
4c563f76
TT		 1119 }
1120
fc34acd3 1121 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 1122
1123 return skb->len;
1124}
1125
1126static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
1127 struct xfrm_state *x, u32 seq)
1128{
1129 struct xfrm_dump_info info;
1130 struct sk_buff *skb;
864745d2 1131 int err;
1da177e4 1132
7deb2264 1133 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 1134 if (!skb)
1135 return ERR_PTR(-ENOMEM);
1136
1da177e4
LT		 1137 info.in_skb = in_skb;
1138 info.out_skb = skb;
1139 info.nlmsg_seq = seq;
1140 info.nlmsg_flags = 0;
1da177e4 1141
864745d2
MK		 1142 err = dump_one_state(x, 0, &info);
1143 if (err) {
1da177e4 1144 kfree_skb(skb);
864745d2 1145 return ERR_PTR(err);
1da177e4
LT		 1146 }
1147
1148 return skb;
1149}
1150
21ee543e
MK		 1151/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1152 * Must be called with RCU read lock.
1153 */
1154static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1155 u32 pid, unsigned int group)
1156{
1157 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
5461fc0c 1158 struct xfrm_translator *xtr;
21ee543e 1159
86126b77
FW		 1160 if (!nlsk) {
1161 kfree_skb(skb);
1162 return -EPIPE;
1163 }
1164
5461fc0c
DS		 1165 xtr = xfrm_get_translator();
1166 if (xtr) {
1167 int err = xtr->alloc_compat(skb, nlmsg_hdr(skb));
1168
1169 xfrm_put_translator(xtr);
1170 if (err) {
1171 kfree_skb(skb);
1172 return err;
1173 }
1174 }
1175
86126b77 1176 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
21ee543e
MK		 1177}
1178
a1b831f2 1179static inline unsigned int xfrm_spdinfo_msgsize(void)
7deb2264
TG		 1180{
1181 return NLMSG_ALIGN(4)
1182 + nla_total_size(sizeof(struct xfrmu_spdinfo))
880a6fab
CG		 1183 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1184 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1185 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
7deb2264
TG		 1186}
1187
e071041b 1188static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 1189 u32 portid, u32 seq, u32 flags)
ecfd6b18 1190{
5a6d3416
JHS		 1191 struct xfrmk_spdinfo si;
1192 struct xfrmu_spdinfo spc;
1193 struct xfrmu_spdhinfo sph;
880a6fab 1194 struct xfrmu_spdhthresh spt4, spt6;
ecfd6b18 1195 struct nlmsghdr *nlh;
1d1e34dd 1196 int err;
ecfd6b18 1197 u32 *f;
880a6fab 1198 unsigned lseq;
ecfd6b18 1199
15e47304 1200 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 1201 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 1202 return -EMSGSIZE;
1203
1204 f = nlmsg_data(nlh);
1205 *f = flags;
e071041b 1206 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 1207 spc.incnt = si.incnt;
1208 spc.outcnt = si.outcnt;
1209 spc.fwdcnt = si.fwdcnt;
1210 spc.inscnt = si.inscnt;
1211 spc.outscnt = si.outscnt;
1212 spc.fwdscnt = si.fwdscnt;
1213 sph.spdhcnt = si.spdhcnt;
1214 sph.spdhmcnt = si.spdhmcnt;
1215
880a6fab
CG		 1216 do {
1217 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1218
1219 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1220 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1221 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1222 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1223 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1224
1d1e34dd
DM		 1225 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1226 if (!err)
1227 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
880a6fab
CG		 1228 if (!err)
1229 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1230 if (!err)
1231 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1d1e34dd
DM		 1232 if (err) {
1233 nlmsg_cancel(skb, nlh);
1234 return err;
1235 }
ecfd6b18 1236
053c095a
JB		 1237 nlmsg_end(skb, nlh);
1238 return 0;
ecfd6b18
JHS		 1239}
1240
880a6fab
CG		 1241static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1242 struct nlattr **attrs)
1243{
1244 struct net *net = sock_net(skb->sk);
1245 struct xfrmu_spdhthresh *thresh4 = NULL;
1246 struct xfrmu_spdhthresh *thresh6 = NULL;
1247
1248 /* selector prefixlen thresholds to hash policies */
1249 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1250 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1251
1252 if (nla_len(rta) < sizeof(*thresh4))
1253 return -EINVAL;
1254 thresh4 = nla_data(rta);
1255 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1256 return -EINVAL;
1257 }
1258 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1259 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1260
1261 if (nla_len(rta) < sizeof(*thresh6))
1262 return -EINVAL;
1263 thresh6 = nla_data(rta);
1264 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1265 return -EINVAL;
1266 }
1267
1268 if (thresh4 || thresh6) {
1269 write_seqlock(&net->xfrm.policy_hthresh.lock);
1270 if (thresh4) {
1271 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1272 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1273 }
1274 if (thresh6) {
1275 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1276 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1277 }
1278 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1279
1280 xfrm_policy_hash_rebuild(net);
1281 }
1282
1283 return 0;
1284}
1285
ecfd6b18 1286static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1287 struct nlattr **attrs)
ecfd6b18 1288{
a6483b79 1289 struct net *net = sock_net(skb->sk);
ecfd6b18 1290 struct sk_buff *r_skb;
7b67c857 1291 u32 *flags = nlmsg_data(nlh);
15e47304 1292 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 1293 u32 seq = nlh->nlmsg_seq;
2fc5f83b 1294 int err;
ecfd6b18 1295
7deb2264 1296 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 1297 if (r_skb == NULL)
1298 return -ENOMEM;
1299
2fc5f83b
GS		 1300 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1301 BUG_ON(err < 0);
ecfd6b18 1302
15e47304 1303 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 1304}
1305
a1b831f2 1306static inline unsigned int xfrm_sadinfo_msgsize(void)
7deb2264
TG		 1307{
1308 return NLMSG_ALIGN(4)
1309 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1310 + nla_total_size(4); /* XFRMA_SAD_CNT */
1311}
1312
e071041b 1313static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1314 u32 portid, u32 seq, u32 flags)
28d8909b 1315{
af11e316
JHS		 1316 struct xfrmk_sadinfo si;
1317 struct xfrmu_sadhinfo sh;
28d8909b 1318 struct nlmsghdr *nlh;
1d1e34dd 1319 int err;
28d8909b
JHS		 1320 u32 *f;
1321
15e47304 1322 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1323 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1324 return -EMSGSIZE;
1325
1326 f = nlmsg_data(nlh);
1327 *f = flags;
e071041b 1328 xfrm_sad_getinfo(net, &si);
28d8909b 1329
af11e316
JHS		 1330 sh.sadhmcnt = si.sadhmcnt;
1331 sh.sadhcnt = si.sadhcnt;
1332
1d1e34dd
DM		 1333 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1334 if (!err)
1335 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1336 if (err) {
1337 nlmsg_cancel(skb, nlh);
1338 return err;
1339 }
28d8909b 1340
053c095a
JB		 1341 nlmsg_end(skb, nlh);
1342 return 0;
28d8909b
JHS		 1343}
1344
1345static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1346 struct nlattr **attrs)
28d8909b 1347{
a6483b79 1348 struct net *net = sock_net(skb->sk);
28d8909b 1349 struct sk_buff *r_skb;
7b67c857 1350 u32 *flags = nlmsg_data(nlh);
15e47304 1351 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1352 u32 seq = nlh->nlmsg_seq;
2fc5f83b 1353 int err;
28d8909b 1354
7deb2264 1355 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1356 if (r_skb == NULL)
1357 return -ENOMEM;
1358
2fc5f83b
GS		 1359 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1360 BUG_ON(err < 0);
28d8909b 1361
15e47304 1362 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1363}
1364
22e70050 1365static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1366 struct nlattr **attrs)
1da177e4 1367{
fc34acd3 1368 struct net *net = sock_net(skb->sk);
7b67c857 1369 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1370 struct xfrm_state *x;
1371 struct sk_buff *resp_skb;
eb2971b6 1372 int err = -ESRCH;
1da177e4 1373
fc34acd3 1374 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1375 if (x == NULL)
1376 goto out_noput;
1377
1378 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1379 if (IS_ERR(resp_skb)) {
1380 err = PTR_ERR(resp_skb);
1381 } else {
15e47304 1382 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1383 }
1384 xfrm_state_put(x);
1385out_noput:
1386 return err;
1387}
1388
22e70050 1389static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1390 struct nlattr **attrs)
1da177e4 1391{
fc34acd3 1392 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1393 struct xfrm_state *x;
1394 struct xfrm_userspi_info *p;
5f3eea6b 1395 struct xfrm_translator *xtr;
1da177e4
LT		 1396 struct sk_buff *resp_skb;
1397 xfrm_address_t *daddr;
1398 int family;
1399 int err;
6f26b61e
JHS		 1400 u32 mark;
1401 struct xfrm_mark m;
7e652640 1402 u32 if_id = 0;
1da177e4 1403
7b67c857 1404 p = nlmsg_data(nlh);
776e9dd9 1405 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1406 if (err)
1407 goto out_noput;
1408
1409 family = p->info.family;
1410 daddr = &p->info.id.daddr;
1411
1412 x = NULL;
6f26b61e
JHS		 1413
1414 mark = xfrm_mark_get(attrs, &m);
7e652640
SK		 1415
1416 if (attrs[XFRMA_IF_ID])
1417 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1418
1da177e4 1419 if (p->info.seq) {
6f26b61e 1420 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1421 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1422 xfrm_state_put(x);
1423 x = NULL;
1424 }
1425 }
1426
1427 if (!x)
6f26b61e 1428 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
7e652640 1429 if_id, p->info.id.proto, daddr,
1da177e4
LT		 1430 &p->info.saddr, 1,
1431 family);
1432 err = -ENOENT;
1433 if (x == NULL)
1434 goto out_noput;
1435
658b219e
HX		 1436 err = xfrm_alloc_spi(x, p->min, p->max);
1437 if (err)
1438 goto out;
1da177e4 1439
658b219e 1440 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1441 if (IS_ERR(resp_skb)) {
1442 err = PTR_ERR(resp_skb);
1443 goto out;
1444 }
1445
5f3eea6b
DS		 1446 xtr = xfrm_get_translator();
1447 if (xtr) {
1448 err = xtr->alloc_compat(skb, nlmsg_hdr(skb));
1449
1450 xfrm_put_translator(xtr);
1451 if (err) {
1452 kfree_skb(resp_skb);
1453 goto out;
1454 }
1455 }
1456
15e47304 1457 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1458
1459out:
1460 xfrm_state_put(x);
1461out_noput:
1462 return err;
1463}
1464
b798a9ed 1465static int verify_policy_dir(u8 dir)
1da177e4
LT		 1466{
1467 switch (dir) {
1468 case XFRM_POLICY_IN:
1469 case XFRM_POLICY_OUT:
1470 case XFRM_POLICY_FWD:
1471 break;
1472
1473 default:
1474 return -EINVAL;
3ff50b79 1475 }
1da177e4
LT		 1476
1477 return 0;
1478}
1479
b798a9ed 1480static int verify_policy_type(u8 type)
f7b6983f
MN		 1481{
1482 switch (type) {
1483 case XFRM_POLICY_TYPE_MAIN:
1484#ifdef CONFIG_XFRM_SUB_POLICY
1485 case XFRM_POLICY_TYPE_SUB:
1486#endif
1487 break;
1488
1489 default:
1490 return -EINVAL;
3ff50b79 1491 }
f7b6983f
MN		 1492
1493 return 0;
1494}
1495
1da177e4
LT		 1496static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1497{
e682adf0
FD		 1498 int ret;
1499
1da177e4
LT		 1500 switch (p->share) {
1501 case XFRM_SHARE_ANY:
1502 case XFRM_SHARE_SESSION:
1503 case XFRM_SHARE_USER:
1504 case XFRM_SHARE_UNIQUE:
1505 break;
1506
1507 default:
1508 return -EINVAL;
3ff50b79 1509 }
1da177e4
LT		 1510
1511 switch (p->action) {
1512 case XFRM_POLICY_ALLOW:
1513 case XFRM_POLICY_BLOCK:
1514 break;
1515
1516 default:
1517 return -EINVAL;
3ff50b79 1518 }
1da177e4
LT		 1519
1520 switch (p->sel.family) {
1521 case AF_INET:
07bf7908
SK		 1522 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
1523 return -EINVAL;
1524
1da177e4
LT		 1525 break;
1526
1527 case AF_INET6:
dfd56b8b 1528#if IS_ENABLED(CONFIG_IPV6)
07bf7908
SK		 1529 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
1530 return -EINVAL;
1531
1da177e4
LT		 1532 break;
1533#else
1534 return -EAFNOSUPPORT;
1535#endif
1536
1537 default:
1538 return -EINVAL;
3ff50b79 1539 }
1da177e4 1540
e682adf0
FD		 1541 ret = verify_policy_dir(p->dir);
1542 if (ret)
1543 return ret;
b805d78d 1544 if (p->index && (xfrm_policy_id2dir(p->index) != p->dir))
e682adf0
FD		 1545 return -EINVAL;
1546
1547 return 0;
1da177e4
LT		 1548}
1549
5424f32e 1550static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1551{
5424f32e 1552 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1553 struct xfrm_user_sec_ctx *uctx;
1554
1555 if (!rt)
1556 return 0;
1557
5424f32e 1558 uctx = nla_data(rt);
52a4c640 1559 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1560}
1561
1da177e4
LT		 1562static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1563 int nr)
1564{
1565 int i;
1566
1567 xp->xfrm_nr = nr;
1568 for (i = 0; i < nr; i++, ut++) {
1569 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1570
1571 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1572 memcpy(&t->saddr, &ut->saddr,
1573 sizeof(xfrm_address_t));
1574 t->reqid = ut->reqid;
1575 t->mode = ut->mode;
1576 t->share = ut->share;
1577 t->optional = ut->optional;
1578 t->aalgos = ut->aalgos;
1579 t->ealgos = ut->ealgos;
1580 t->calgos = ut->calgos;
c5d18e98
HX		 1581 /* If all masks are ~0, then we allow all algorithms. */
1582 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1583 t->encap_family = ut->family;
1da177e4
LT		 1584 }
1585}
1586
b4ad86bf
DM		 1587static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1588{
732706af 1589 u16 prev_family;
b4ad86bf
DM		 1590 int i;
1591
1592 if (nr > XFRM_MAX_DEPTH)
1593 return -EINVAL;
1594
732706af
SK		 1595 prev_family = family;
1596
b4ad86bf
DM		 1597 for (i = 0; i < nr; i++) {
1598 /* We never validated the ut->family value, so many
1599 * applications simply leave it at zero. The check was
1600 * never made and ut->family was ignored because all
1601 * templates could be assumed to have the same family as
1602 * the policy itself. Now that we will have ipv4-in-ipv6
1603 * and ipv6-in-ipv4 tunnels, this is no longer true.
1604 */
1605 if (!ut[i].family)
1606 ut[i].family = family;
1607
35e61038
FW		 1608 switch (ut[i].mode) {
1609 case XFRM_MODE_TUNNEL:
1610 case XFRM_MODE_BEET:
1611 break;
1612 default:
1613 if (ut[i].family != prev_family)
1614 return -EINVAL;
1615 break;
1616 }
32bf94fb
ST		 1617 if (ut[i].mode >= XFRM_MODE_MAX)
1618 return -EINVAL;
732706af
SK		 1619
1620 prev_family = ut[i].family;
1621
b4ad86bf
DM		 1622 switch (ut[i].family) {
1623 case AF_INET:
1624 break;
dfd56b8b 1625#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1626 case AF_INET6:
1627 break;
1628#endif
1629 default:
1630 return -EINVAL;
3ff50b79 1631 }
6a53b759 1632
dbb2483b 1633 if (!xfrm_id_proto_valid(ut[i].id.proto))
6a53b759 1634 return -EINVAL;
b4ad86bf
DM		 1635 }
1636
1637 return 0;
1638}
1639
5424f32e 1640static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1641{
5424f32e 1642 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1643
1644 if (!rt) {
1645 pol->xfrm_nr = 0;
1646 } else {
5424f32e
TG		 1647 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1648 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1649 int err;
1da177e4 1650
b4ad86bf
DM		 1651 err = validate_tmpl(nr, utmpl, pol->family);
1652 if (err)
1653 return err;
1da177e4 1654
5424f32e 1655 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1656 }
1657 return 0;
1658}
1659
5424f32e 1660static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1661{
5424f32e 1662 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1663 struct xfrm_userpolicy_type *upt;
b798a9ed 1664 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1665 int err;
1666
1667 if (rt) {
5424f32e 1668 upt = nla_data(rt);
f7b6983f
MN		 1669 type = upt->type;
1670 }
1671
1672 err = verify_policy_type(type);
1673 if (err)
1674 return err;
1675
1676 *tp = type;
1677 return 0;
1678}
1679
1da177e4
LT		 1680static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1681{
1682 xp->priority = p->priority;
1683 xp->index = p->index;
1684 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1685 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1686 xp->action = p->action;
1687 xp->flags = p->flags;
1688 xp->family = p->sel.family;
1689 /* XXX xp->share = p->share; */
1690}
1691
1692static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1693{
7b789836 1694 memset(p, 0, sizeof(*p));
1da177e4
LT		 1695 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1696 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1697 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1698 p->priority = xp->priority;
1699 p->index = xp->index;
1700 p->sel.family = xp->family;
1701 p->dir = dir;
1702 p->action = xp->action;
1703 p->flags = xp->flags;
1704 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1705}
1706
fc34acd3 1707static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1708{
fc34acd3 1709 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1710 int err;
1711
1712 if (!xp) {
1713 *errp = -ENOMEM;
1714 return NULL;
1715 }
1716
1717 copy_from_user_policy(xp, p);
df71837d 1718
35a7aa08 1719 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1720 if (err)
1721 goto error;
1722
35a7aa08
TG		 1723 if (!(err = copy_from_user_tmpl(xp, attrs)))
1724 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1725 if (err)
1726 goto error;
1da177e4 1727
295fae56
JHS		 1728 xfrm_mark_get(attrs, &xp->mark);
1729
7e652640
SK		 1730 if (attrs[XFRMA_IF_ID])
1731 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1732
1da177e4 1733 return xp;
f7b6983f
MN		 1734 error:
1735 *errp = err;
12a169e7 1736 xp->walk.dead = 1;
64c31b3f 1737 xfrm_policy_destroy(xp);
f7b6983f 1738 return NULL;
1da177e4
LT		 1739}
1740
22e70050 1741static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1742 struct nlattr **attrs)
1da177e4 1743{
fc34acd3 1744 struct net *net = sock_net(skb->sk);
7b67c857 1745 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1746 struct xfrm_policy *xp;
26b15dad 1747 struct km_event c;
1da177e4
LT		 1748 int err;
1749 int excl;
1750
1751 err = verify_newpolicy_info(p);
df71837d
TJ		 1752 if (err)
1753 return err;
35a7aa08 1754 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1755 if (err)
1756 return err;
1757
fc34acd3 1758 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1759 if (!xp)
1760 return err;
1761
25985edc 1762 /* shouldn't excl be based on nlh flags??
26b15dad 1763 * Aha! this is anti-netlink really i.e more pfkey derived
a7fd0e6d 1764 * in netlink excl is a flag and you wouldn't need
26b15dad 1765 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1766 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1767 err = xfrm_policy_insert(p->dir, xp, excl);
2e71029e 1768 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 1769
1da177e4 1770 if (err) {
03e1ad7b 1771 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1772 kfree(xp);
1773 return err;
1774 }
1775
f60f6b8f 1776 c.event = nlh->nlmsg_type;
26b15dad 1777 c.seq = nlh->nlmsg_seq;
15e47304 1778 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1779 km_policy_notify(xp, p->dir, &c);
1780
1da177e4
LT		 1781 xfrm_pol_put(xp);
1782
1783 return 0;
1784}
1785
1786static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1787{
1788 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1789 int i;
1790
1791 if (xp->xfrm_nr == 0)
1792 return 0;
1793
1794 for (i = 0; i < xp->xfrm_nr; i++) {
1795 struct xfrm_user_tmpl *up = &vec[i];
1796 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1797
1f86840f 1798 memset(up, 0, sizeof(*up));
1da177e4 1799 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1800 up->family = kp->encap_family;
1da177e4
LT		 1801 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1802 up->reqid = kp->reqid;
1803 up->mode = kp->mode;
1804 up->share = kp->share;
1805 up->optional = kp->optional;
1806 up->aalgos = kp->aalgos;
1807 up->ealgos = kp->ealgos;
1808 up->calgos = kp->calgos;
1809 }
df71837d 1810
c0144bea
TG		 1811 return nla_put(skb, XFRMA_TMPL,
1812 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1813}
1814
1815static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1816{
1817 if (x->security) {
1818 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1819 }
1820 return 0;
0d681623 1821}
df71837d 1822
0d681623
SH		 1823static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1824{
1d1e34dd 1825 if (xp->security)
0d681623 1826 return copy_sec_ctx(xp->security, skb);
0d681623 1827 return 0;
df71837d 1828}
a1b831f2 1829static inline unsigned int userpolicy_type_attrsize(void)
cfbfd45a
TG		 1830{
1831#ifdef CONFIG_XFRM_SUB_POLICY
1832 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1833#else
1834 return 0;
1835#endif
1836}
df71837d 1837
f7b6983f 1838#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1839static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1840{
45c180bc
ED		 1841 struct xfrm_userpolicy_type upt;
1842
1843 /* Sadly there are two holes in struct xfrm_userpolicy_type */
1844 memset(&upt, 0, sizeof(upt));
1845 upt.type = type;
f7b6983f 1846
c0144bea 1847 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1848}
1849
1850#else
b798a9ed 1851static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1852{
1853 return 0;
1854}
1855#endif
1856
1da177e4
LT		 1857static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1858{
1859 struct xfrm_dump_info *sp = ptr;
1860 struct xfrm_userpolicy_info *p;
1861 struct sk_buff *in_skb = sp->in_skb;
1862 struct sk_buff *skb = sp->out_skb;
5f3eea6b 1863 struct xfrm_translator *xtr;
1da177e4 1864 struct nlmsghdr *nlh;
1d1e34dd 1865 int err;
1da177e4 1866
15e47304 1867 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1868 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1869 if (nlh == NULL)
1870 return -EMSGSIZE;
1da177e4 1871
7b67c857 1872 p = nlmsg_data(nlh);
1da177e4 1873 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1874 err = copy_to_user_tmpl(xp, skb);
1875 if (!err)
1876 err = copy_to_user_sec_ctx(xp, skb);
1877 if (!err)
1878 err = copy_to_user_policy_type(xp->type, skb);
1879 if (!err)
1880 err = xfrm_mark_put(skb, &xp->mark);
7e652640
SK		 1881 if (!err)
1882 err = xfrm_if_id_put(skb, xp->if_id);
1d1e34dd
DM		 1883 if (err) {
1884 nlmsg_cancel(skb, nlh);
1885 return err;
1886 }
9825069d 1887 nlmsg_end(skb, nlh);
5f3eea6b
DS		 1888
1889 xtr = xfrm_get_translator();
1890 if (xtr) {
1891 err = xtr->alloc_compat(skb, nlh);
1892
1893 xfrm_put_translator(xtr);
1894 if (err) {
1895 nlmsg_cancel(skb, nlh);
1896 return err;
1897 }
1898 }
1899
1da177e4 1900 return 0;
1da177e4
LT		 1901}
1902
4c563f76
TT		 1903static int xfrm_dump_policy_done(struct netlink_callback *cb)
1904{
1137b5e2 1905 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
283bc9f3 1906 struct net *net = sock_net(cb->skb->sk);
4c563f76 1907
283bc9f3 1908 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1909 return 0;
1910}
1911
1137b5e2
HX		 1912static int xfrm_dump_policy_start(struct netlink_callback *cb)
1913{
1914 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1915
1916 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1917
1918 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1919 return 0;
1920}
1921
1da177e4
LT		 1922static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1923{
fc34acd3 1924 struct net *net = sock_net(skb->sk);
1137b5e2 1925 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1da177e4
LT		 1926 struct xfrm_dump_info info;
1927
1928 info.in_skb = cb->skb;
1929 info.out_skb = skb;
1930 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1931 info.nlmsg_flags = NLM_F_MULTI;
4c563f76 1932
fc34acd3 1933 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1934
1935 return skb->len;
1936}
1937
1938static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1939 struct xfrm_policy *xp,
1940 int dir, u32 seq)
1941{
1942 struct xfrm_dump_info info;
1943 struct sk_buff *skb;
c2546372 1944 int err;
1da177e4 1945
7deb2264 1946 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1947 if (!skb)
1948 return ERR_PTR(-ENOMEM);
1949
1da177e4
LT		 1950 info.in_skb = in_skb;
1951 info.out_skb = skb;
1952 info.nlmsg_seq = seq;
1953 info.nlmsg_flags = 0;
1da177e4 1954
c2546372
MK		 1955 err = dump_one_policy(xp, dir, 0, &info);
1956 if (err) {
1da177e4 1957 kfree_skb(skb);
c2546372 1958 return ERR_PTR(err);
1da177e4
LT		 1959 }
1960
1961 return skb;
1962}
1963
88d0adb5
ND		 1964static int xfrm_notify_userpolicy(struct net *net)
1965{
1966 struct xfrm_userpolicy_default *up;
1967 int len = NLMSG_ALIGN(sizeof(*up));
1968 struct nlmsghdr *nlh;
1969 struct sk_buff *skb;
93ec1320 1970 int err;
88d0adb5
ND		 1971
1972 skb = nlmsg_new(len, GFP_ATOMIC);
1973 if (skb == NULL)
1974 return -ENOMEM;
1975
1976 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_GETDEFAULT, sizeof(*up), 0);
1977 if (nlh == NULL) {
1978 kfree_skb(skb);
1979 return -EMSGSIZE;
1980 }
1981
1982 up = nlmsg_data(nlh);
1983 up->in = net->xfrm.policy_default & XFRM_POL_DEFAULT_IN ?
1984 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
1985 up->fwd = net->xfrm.policy_default & XFRM_POL_DEFAULT_FWD ?
1986 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
1987 up->out = net->xfrm.policy_default & XFRM_POL_DEFAULT_OUT ?
1988 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
1989
1990 nlmsg_end(skb, nlh);
1991
93ec1320
ND		 1992 rcu_read_lock();
1993 err = xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
1994 rcu_read_unlock();
1995
1996 return err;
88d0adb5
ND		 1997}
1998
2d151d39
SK		 1999static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
2000 struct nlattr **attrs)
2001{
2002 struct net *net = sock_net(skb->sk);
2003 struct xfrm_userpolicy_default *up = nlmsg_data(nlh);
2d151d39 2004
f8d858e6
ND		 2005 if (up->in == XFRM_USERPOLICY_BLOCK)
2006 net->xfrm.policy_default |= XFRM_POL_DEFAULT_IN;
2007 else if (up->in == XFRM_USERPOLICY_ACCEPT)
2008 net->xfrm.policy_default &= ~XFRM_POL_DEFAULT_IN;
5d8dbb7f 2009
f8d858e6
ND		 2010 if (up->fwd == XFRM_USERPOLICY_BLOCK)
2011 net->xfrm.policy_default |= XFRM_POL_DEFAULT_FWD;
2012 else if (up->fwd == XFRM_USERPOLICY_ACCEPT)
2013 net->xfrm.policy_default &= ~XFRM_POL_DEFAULT_FWD;
5d8dbb7f 2014
f8d858e6
ND		 2015 if (up->out == XFRM_USERPOLICY_BLOCK)
2016 net->xfrm.policy_default |= XFRM_POL_DEFAULT_OUT;
2017 else if (up->out == XFRM_USERPOLICY_ACCEPT)
2018 net->xfrm.policy_default &= ~XFRM_POL_DEFAULT_OUT;
2d151d39
SK		 2019
2020 rt_genid_bump_all(net);
2021
88d0adb5 2022 xfrm_notify_userpolicy(net);
2d151d39
SK		 2023 return 0;
2024}
2025
2026static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh,
2027 struct nlattr **attrs)
2028{
2029 struct sk_buff *r_skb;
2030 struct nlmsghdr *r_nlh;
2031 struct net *net = sock_net(skb->sk);
f8d858e6 2032 struct xfrm_userpolicy_default *r_up;
2d151d39
SK		 2033 int len = NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_default));
2034 u32 portid = NETLINK_CB(skb).portid;
2035 u32 seq = nlh->nlmsg_seq;
2036
2d151d39
SK		 2037 r_skb = nlmsg_new(len, GFP_ATOMIC);
2038 if (!r_skb)
2039 return -ENOMEM;
2040
2041 r_nlh = nlmsg_put(r_skb, portid, seq, XFRM_MSG_GETDEFAULT, sizeof(*r_up), 0);
2042 if (!r_nlh) {
2043 kfree_skb(r_skb);
2044 return -EMSGSIZE;
2045 }
2046
2047 r_up = nlmsg_data(r_nlh);
2048
f8d858e6
ND		 2049 r_up->in = net->xfrm.policy_default & XFRM_POL_DEFAULT_IN ?
2050 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
2051 r_up->fwd = net->xfrm.policy_default & XFRM_POL_DEFAULT_FWD ?
2052 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
2053 r_up->out = net->xfrm.policy_default & XFRM_POL_DEFAULT_OUT ?
2054 XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT;
2d151d39
SK		 2055 nlmsg_end(r_skb, r_nlh);
2056
2057 return nlmsg_unicast(net->xfrm.nlsk, r_skb, portid);
2058}
2059
22e70050 2060static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2061 struct nlattr **attrs)
1da177e4 2062{
fc34acd3 2063 struct net *net = sock_net(skb->sk);
1da177e4
LT		 2064 struct xfrm_policy *xp;
2065 struct xfrm_userpolicy_id *p;
b798a9ed 2066 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 2067 int err;
26b15dad 2068 struct km_event c;
1da177e4 2069 int delete;
295fae56 2070 struct xfrm_mark m;
7e652640 2071 u32 if_id = 0;
1da177e4 2072
7b67c857 2073 p = nlmsg_data(nlh);
1da177e4
LT		 2074 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
2075
35a7aa08 2076 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2077 if (err)
2078 return err;
2079
1da177e4
LT		 2080 err = verify_policy_dir(p->dir);
2081 if (err)
2082 return err;
2083
7e652640
SK		 2084 if (attrs[XFRMA_IF_ID])
2085 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2086
4f47e8ab
XL		 2087 xfrm_mark_get(attrs, &m);
2088
1da177e4 2089 if (p->index)
4f47e8ab
XL		 2090 xp = xfrm_policy_byid(net, &m, if_id, type, p->dir,
2091 p->index, delete, &err);
df71837d 2092 else {
5424f32e 2093 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 2094 struct xfrm_sec_ctx *ctx;
df71837d 2095
35a7aa08 2096 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 2097 if (err)
2098 return err;
2099
2c8dd116 2100 ctx = NULL;
df71837d 2101 if (rt) {
5424f32e 2102 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 2103
52a4c640 2104 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 2105 if (err)
df71837d 2106 return err;
2c8dd116 2107 }
4f47e8ab
XL		 2108 xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
2109 &p->sel, ctx, delete, &err);
03e1ad7b 2110 security_xfrm_policy_free(ctx);
df71837d 2111 }
1da177e4
LT		 2112 if (xp == NULL)
2113 return -ENOENT;
2114
2115 if (!delete) {
2116 struct sk_buff *resp_skb;
2117
2118 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
2119 if (IS_ERR(resp_skb)) {
2120 err = PTR_ERR(resp_skb);
2121 } else {
a6483b79 2122 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 2123 NETLINK_CB(skb).portid);
1da177e4 2124 }
26b15dad 2125 } else {
2e71029e 2126 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 2127
2128 if (err != 0)
c8c05a8e 2129 goto out;
13fcfbb0 2130
e7443892 2131 c.data.byid = p->index;
f60f6b8f 2132 c.event = nlh->nlmsg_type;
26b15dad 2133 c.seq = nlh->nlmsg_seq;
15e47304 2134 c.portid = nlh->nlmsg_pid;
26b15dad 2135 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 2136 }
2137
c8c05a8e 2138out:
ef41aaa0 2139 xfrm_pol_put(xp);
1da177e4
LT		 2140 return err;
2141}
2142
22e70050 2143static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2144 struct nlattr **attrs)
1da177e4 2145{
fc34acd3 2146 struct net *net = sock_net(skb->sk);
26b15dad 2147 struct km_event c;
7b67c857 2148 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
4aa2e62c 2149 int err;
1da177e4 2150
f75a2804 2151 err = xfrm_state_flush(net, p->proto, true, false);
9e64cc95
JHS		 2152 if (err) {
2153 if (err == -ESRCH) /* empty table */
2154 return 0;
069c474e 2155 return err;
9e64cc95 2156 }
bf08867f 2157 c.data.proto = p->proto;
f60f6b8f 2158 c.event = nlh->nlmsg_type;
26b15dad 2159 c.seq = nlh->nlmsg_seq;
15e47304 2160 c.portid = nlh->nlmsg_pid;
7067802e 2161 c.net = net;
26b15dad
JHS		 2162 km_state_notify(NULL, &c);
2163
1da177e4
LT		 2164 return 0;
2165}
2166
a1b831f2 2167static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 2168{
a1b831f2 2169 unsigned int replay_size = x->replay_esn ?
d8647b79
SK		 2170 xfrm_replay_state_esn_len(x->replay_esn) :
2171 sizeof(struct xfrm_replay_state);
2172
7deb2264 2173 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 2174 + nla_total_size(replay_size)
de95c4a4 2175 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
6f26b61e 2176 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2177 + nla_total_size(4) /* XFRM_AE_RTHR */
2178 + nla_total_size(4); /* XFRM_AE_ETHR */
2179}
d51d081d 2180
214e005b 2181static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 2182{
2183 struct xfrm_aevent_id *id;
2184 struct nlmsghdr *nlh;
1d1e34dd 2185 int err;
d51d081d 2186
15e47304 2187 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 2188 if (nlh == NULL)
2189 return -EMSGSIZE;
d51d081d 2190
7b67c857 2191 id = nlmsg_data(nlh);
931e79d7 2192 memset(&id->sa_id, 0, sizeof(id->sa_id));
9b7a787d 2193 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 2194 id->sa_id.spi = x->id.spi;
2195 id->sa_id.family = x->props.family;
2196 id->sa_id.proto = x->id.proto;
9b7a787d 2197 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 2198 id->reqid = x->props.reqid;
d51d081d
JHS		 2199 id->flags = c->data.aevent;
2200
d0fde795 2201 if (x->replay_esn) {
1d1e34dd
DM		 2202 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
2203 xfrm_replay_state_esn_len(x->replay_esn),
2204 x->replay_esn);
d0fde795 2205 } else {
1d1e34dd
DM		 2206 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
2207 &x->replay);
d0fde795 2208 }
1d1e34dd
DM		 2209 if (err)
2210 goto out_cancel;
de95c4a4
ND		 2211 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
2212 XFRMA_PAD);
1d1e34dd
DM		 2213 if (err)
2214 goto out_cancel;
d51d081d 2215
1d1e34dd
DM		 2216 if (id->flags & XFRM_AE_RTHR) {
2217 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
2218 if (err)
2219 goto out_cancel;
2220 }
2221 if (id->flags & XFRM_AE_ETHR) {
2222 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
2223 x->replay_maxage * 10 / HZ);
2224 if (err)
2225 goto out_cancel;
2226 }
2227 err = xfrm_mark_put(skb, &x->mark);
2228 if (err)
2229 goto out_cancel;
6f26b61e 2230
7e652640
SK		 2231 err = xfrm_if_id_put(skb, x->if_id);
2232 if (err)
2233 goto out_cancel;
2234
053c095a
JB		 2235 nlmsg_end(skb, nlh);
2236 return 0;
d51d081d 2237
1d1e34dd 2238out_cancel:
9825069d 2239 nlmsg_cancel(skb, nlh);
1d1e34dd 2240 return err;
d51d081d
JHS		 2241}
2242
22e70050 2243static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2244 struct nlattr **attrs)
d51d081d 2245{
fc34acd3 2246 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 2247 struct xfrm_state *x;
2248 struct sk_buff *r_skb;
2249 int err;
2250 struct km_event c;
6f26b61e
JHS		 2251 u32 mark;
2252 struct xfrm_mark m;
7b67c857 2253 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 2254 struct xfrm_usersa_id *id = &p->sa_id;
2255
6f26b61e
JHS		 2256 mark = xfrm_mark_get(attrs, &m);
2257
2258 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 2259 if (x == NULL)
d51d081d 2260 return -ESRCH;
d8647b79
SK		 2261
2262 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2263 if (r_skb == NULL) {
2264 xfrm_state_put(x);
2265 return -ENOMEM;
d51d081d
JHS		 2266 }
2267
2268 /*
2269 * XXX: is this lock really needed - none of the other
2270 * gets lock (the concern is things getting updated
2271 * while we are still reading) - jhs
2272 */
2273 spin_lock_bh(&x->lock);
2274 c.data.aevent = p->flags;
2275 c.seq = nlh->nlmsg_seq;
15e47304 2276 c.portid = nlh->nlmsg_pid;
d51d081d 2277
2fc5f83b
GS		 2278 err = build_aevent(r_skb, x, &c);
2279 BUG_ON(err < 0);
2280
15e47304 2281 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 2282 spin_unlock_bh(&x->lock);
2283 xfrm_state_put(x);
2284 return err;
2285}
2286
22e70050 2287static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2288 struct nlattr **attrs)
d51d081d 2289{
fc34acd3 2290 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 2291 struct xfrm_state *x;
2292 struct km_event c;
02d0892f 2293 int err = -EINVAL;
6f26b61e
JHS		 2294 u32 mark = 0;
2295 struct xfrm_mark m;
7b67c857 2296 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 2297 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 2298 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 2299 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
4e077237
MR		 2300 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2301 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 2302
4e077237 2303 if (!lt && !rp && !re && !et && !rt)
d51d081d
JHS		 2304 return err;
2305
2306 /* pedantic mode - thou shalt sayeth replaceth */
2307 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
2308 return err;
2309
6f26b61e
JHS		 2310 mark = xfrm_mark_get(attrs, &m);
2311
2312 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 2313 if (x == NULL)
2314 return -ESRCH;
2315
2316 if (x->km.state != XFRM_STATE_VALID)
2317 goto out;
2318
4479ff76 2319 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 2320 if (err)
2321 goto out;
2322
d51d081d 2323 spin_lock_bh(&x->lock);
e3ac104d 2324 xfrm_update_ae_params(x, attrs, 1);
d51d081d 2325 spin_unlock_bh(&x->lock);
d51d081d
JHS		 2326
2327 c.event = nlh->nlmsg_type;
2328 c.seq = nlh->nlmsg_seq;
15e47304 2329 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 2330 c.data.aevent = XFRM_AE_CU;
2331 km_state_notify(x, &c);
2332 err = 0;
2333out:
2334 xfrm_state_put(x);
2335 return err;
2336}
2337
22e70050 2338static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2339 struct nlattr **attrs)
1da177e4 2340{
fc34acd3 2341 struct net *net = sock_net(skb->sk);
f7b6983f 2342 struct km_event c;
b798a9ed 2343 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 2344 int err;
2345
35a7aa08 2346 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2347 if (err)
2348 return err;
26b15dad 2349
2e71029e 2350 err = xfrm_policy_flush(net, type, true);
2f1eb65f
JHS		 2351 if (err) {
2352 if (err == -ESRCH) /* empty table */
2353 return 0;
069c474e 2354 return err;
2f1eb65f
JHS		 2355 }
2356
f7b6983f 2357 c.data.type = type;
f60f6b8f 2358 c.event = nlh->nlmsg_type;
26b15dad 2359 c.seq = nlh->nlmsg_seq;
15e47304 2360 c.portid = nlh->nlmsg_pid;
7067802e 2361 c.net = net;
26b15dad 2362 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2363 return 0;
2364}
2365
22e70050 2366static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2367 struct nlattr **attrs)
6c5c8ca7 2368{
fc34acd3 2369 struct net *net = sock_net(skb->sk);
6c5c8ca7 2370 struct xfrm_policy *xp;
7b67c857 2371 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 2372 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 2373 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 2374 int err = -ENOENT;
295fae56 2375 struct xfrm_mark m;
7e652640 2376 u32 if_id = 0;
6c5c8ca7 2377
35a7aa08 2378 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2379 if (err)
2380 return err;
2381
c8bf4d04
TT		 2382 err = verify_policy_dir(p->dir);
2383 if (err)
2384 return err;
2385
7e652640
SK		 2386 if (attrs[XFRMA_IF_ID])
2387 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2388
4f47e8ab
XL		 2389 xfrm_mark_get(attrs, &m);
2390
6c5c8ca7 2391 if (p->index)
4f47e8ab
XL		 2392 xp = xfrm_policy_byid(net, &m, if_id, type, p->dir, p->index,
2393 0, &err);
6c5c8ca7 2394 else {
5424f32e 2395 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 2396 struct xfrm_sec_ctx *ctx;
6c5c8ca7 2397
35a7aa08 2398 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 2399 if (err)
2400 return err;
2401
2c8dd116 2402 ctx = NULL;
6c5c8ca7 2403 if (rt) {
5424f32e 2404 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 2405
52a4c640 2406 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 2407 if (err)
6c5c8ca7 2408 return err;
2c8dd116 2409 }
4f47e8ab 2410 xp = xfrm_policy_bysel_ctx(net, &m, if_id, type, p->dir,
6f26b61e 2411 &p->sel, ctx, 0, &err);
03e1ad7b 2412 security_xfrm_policy_free(ctx);
6c5c8ca7 2413 }
6c5c8ca7 2414 if (xp == NULL)
ef41aaa0 2415 return -ENOENT;
03e1ad7b 2416
ea2dea9d 2417 if (unlikely(xp->walk.dead))
6c5c8ca7 2418 goto out;
6c5c8ca7 2419
6c5c8ca7
JHS		 2420 err = 0;
2421 if (up->hard) {
2422 xfrm_policy_delete(xp, p->dir);
2e71029e 2423 xfrm_audit_policy_delete(xp, 1, true);
6c5c8ca7 2424 }
c6bb8136 2425 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 2426
2427out:
2428 xfrm_pol_put(xp);
2429 return err;
2430}
2431
22e70050 2432static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2433 struct nlattr **attrs)
53bc6b4d 2434{
fc34acd3 2435 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 2436 struct xfrm_state *x;
2437 int err;
7b67c857 2438 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 2439 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 2440 struct xfrm_mark m;
928497f0 2441 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 2442
6f26b61e 2443 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 2444
3a765aa5 2445 err = -ENOENT;
53bc6b4d
JHS		 2446 if (x == NULL)
2447 return err;
2448
53bc6b4d 2449 spin_lock_bh(&x->lock);
3a765aa5 2450 err = -EINVAL;
53bc6b4d
JHS		 2451 if (x->km.state != XFRM_STATE_VALID)
2452 goto out;
c6bb8136 2453 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 2454
161a09e7 2455 if (ue->hard) {
53bc6b4d 2456 __xfrm_state_delete(x);
2e71029e 2457 xfrm_audit_state_delete(x, 1, true);
161a09e7 2458 }
3a765aa5 2459 err = 0;
53bc6b4d
JHS		 2460out:
2461 spin_unlock_bh(&x->lock);
2462 xfrm_state_put(x);
2463 return err;
2464}
2465
22e70050 2466static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2467 struct nlattr **attrs)
980ebd25 2468{
fc34acd3 2469 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2470 struct xfrm_policy *xp;
2471 struct xfrm_user_tmpl *ut;
2472 int i;
5424f32e 2473 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2474 struct xfrm_mark mark;
980ebd25 2475
7b67c857 2476 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2477 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2478 int err = -ENOMEM;
2479
2480 if (!x)
d8eb9307 2481 goto nomem;
980ebd25 2482
6f26b61e
JHS		 2483 xfrm_mark_get(attrs, &mark);
2484
980ebd25 2485 err = verify_newpolicy_info(&ua->policy);
a1a7e3a3
XL		 2486 if (err)
2487 goto free_state;
2488 err = verify_sec_ctx_len(attrs);
d8eb9307 2489 if (err)
73efc324 2490 goto free_state;
980ebd25
JHS		 2491
2492 /* build an XP */
fc34acd3 2493 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2494 if (!xp)
2495 goto free_state;
980ebd25
JHS		 2496
2497 memcpy(&x->id, &ua->id, sizeof(ua->id));
2498 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2499 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2500 xp->mark.m = x->mark.m = mark.m;
2501 xp->mark.v = x->mark.v = mark.v;
5424f32e 2502 ut = nla_data(rt);
980ebd25
JHS		 2503 /* extract the templates and for each call km_key */
2504 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2505 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2506 memcpy(&x->id, &t->id, sizeof(x->id));
2507 x->props.mode = t->mode;
2508 x->props.reqid = t->reqid;
2509 x->props.family = ut->family;
2510 t->aalgos = ua->aalgos;
2511 t->ealgos = ua->ealgos;
2512 t->calgos = ua->calgos;
2513 err = km_query(x, t, xp);
2514
2515 }
2516
4a135e53 2517 xfrm_state_free(x);
980ebd25
JHS		 2518 kfree(xp);
2519
2520 return 0;
d8eb9307 2521
d8eb9307 2522free_state:
4a135e53 2523 xfrm_state_free(x);
d8eb9307
IJ		 2524nomem:
2525 return err;
980ebd25
JHS		 2526}
2527
5c79de6e 2528#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2529static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2530 struct xfrm_kmaddress *k,
5424f32e 2531 struct nlattr **attrs, int *num)
5c79de6e 2532{
5424f32e 2533 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2534 struct xfrm_user_migrate *um;
2535 int i, num_migrate;
2536
13c1d189
AE		 2537 if (k != NULL) {
2538 struct xfrm_user_kmaddress *uk;
2539
2540 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2541 memcpy(&k->local, &uk->local, sizeof(k->local));
2542 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2543 k->family = uk->family;
2544 k->reserved = uk->reserved;
2545 }
2546
5424f32e
TG		 2547 um = nla_data(rt);
2548 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2549
2550 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2551 return -EINVAL;
2552
2553 for (i = 0; i < num_migrate; i++, um++, ma++) {
2554 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2555 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2556 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2557 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2558
2559 ma->proto = um->proto;
2560 ma->mode = um->mode;
2561 ma->reqid = um->reqid;
2562
2563 ma->old_family = um->old_family;
2564 ma->new_family = um->new_family;
2565 }
2566
2567 *num = i;
2568 return 0;
2569}
2570
2571static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2572 struct nlattr **attrs)
5c79de6e 2573{
7b67c857 2574 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2575 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2576 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2577 u8 type;
2578 int err;
2579 int n = 0;
8d549c4f 2580 struct net *net = sock_net(skb->sk);
4ab47d47 2581 struct xfrm_encap_tmpl *encap = NULL;
5c79de6e 2582
35a7aa08 2583 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2584 return -EINVAL;
5c79de6e 2585
13c1d189
AE		 2586 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2587
5424f32e 2588 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2589 if (err)
2590 return err;
2591
13c1d189 2592 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2593 if (err)
2594 return err;
2595
2596 if (!n)
2597 return 0;
2598
4ab47d47
AA		 2599 if (attrs[XFRMA_ENCAP]) {
2600 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2601 sizeof(*encap), GFP_KERNEL);
2602 if (!encap)
4ac7a6ee 2603 return -ENOMEM;
4ab47d47 2604 }
5c79de6e 2605
4ab47d47
AA		 2606 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2607
2608 kfree(encap);
2609
2610 return err;
5c79de6e
SS		 2611}
2612#else
2613static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2614 struct nlattr **attrs)
5c79de6e
SS		 2615{
2616 return -ENOPROTOOPT;
2617}
2618#endif
2619
2620#ifdef CONFIG_XFRM_MIGRATE
183cad12 2621static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2622{
2623 struct xfrm_user_migrate um;
2624
2625 memset(&um, 0, sizeof(um));
2626 um.proto = m->proto;
2627 um.mode = m->mode;
2628 um.reqid = m->reqid;
2629 um.old_family = m->old_family;
2630 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2631 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2632 um.new_family = m->new_family;
2633 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2634 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2635
c0144bea 2636 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2637}
2638
183cad12 2639static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2640{
2641 struct xfrm_user_kmaddress uk;
2642
2643 memset(&uk, 0, sizeof(uk));
2644 uk.family = k->family;
2645 uk.reserved = k->reserved;
2646 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2647 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2648
2649 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2650}
2651
a1b831f2
AD		 2652static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2653 int with_encp)
7deb2264
TG		 2654{
2655 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189 2656 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
8bafd730 2657 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
13c1d189
AE		 2658 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2659 + userpolicy_type_attrsize();
7deb2264
TG		 2660}
2661
183cad12
DM		 2662static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2663 int num_migrate, const struct xfrm_kmaddress *k,
8bafd730
AA		 2664 const struct xfrm_selector *sel,
2665 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
5c79de6e 2666{
183cad12 2667 const struct xfrm_migrate *mp;
5c79de6e
SS		 2668 struct xfrm_userpolicy_id *pol_id;
2669 struct nlmsghdr *nlh;
1d1e34dd 2670 int i, err;
5c79de6e 2671
79b8b7f4
TG		 2672 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2673 if (nlh == NULL)
2674 return -EMSGSIZE;
5c79de6e 2675
7b67c857 2676 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2677 /* copy data from selector, dir, and type to the pol_id */
2678 memset(pol_id, 0, sizeof(*pol_id));
2679 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2680 pol_id->dir = dir;
2681
1d1e34dd
DM		 2682 if (k != NULL) {
2683 err = copy_to_user_kmaddress(k, skb);
2684 if (err)
2685 goto out_cancel;
2686 }
8bafd730
AA		 2687 if (encap) {
2688 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2689 if (err)
2690 goto out_cancel;
2691 }
1d1e34dd
DM		 2692 err = copy_to_user_policy_type(type, skb);
2693 if (err)
2694 goto out_cancel;
5c79de6e 2695 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2696 err = copy_to_user_migrate(mp, skb);
2697 if (err)
2698 goto out_cancel;
5c79de6e
SS		 2699 }
2700
053c095a
JB		 2701 nlmsg_end(skb, nlh);
2702 return 0;
1d1e34dd
DM		 2703
2704out_cancel:
9825069d 2705 nlmsg_cancel(skb, nlh);
1d1e34dd 2706 return err;
5c79de6e
SS		 2707}
2708
183cad12
DM		 2709static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2710 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2711 const struct xfrm_kmaddress *k,
2712 const struct xfrm_encap_tmpl *encap)
5c79de6e 2713{
a6483b79 2714 struct net *net = &init_net;
5c79de6e 2715 struct sk_buff *skb;
2fc5f83b 2716 int err;
5c79de6e 2717
8bafd730
AA		 2718 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2719 GFP_ATOMIC);
5c79de6e
SS		 2720 if (skb == NULL)
2721 return -ENOMEM;
2722
2723 /* build migrate */
2fc5f83b
GS		 2724 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2725 BUG_ON(err < 0);
5c79de6e 2726
21ee543e 2727 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
5c79de6e
SS		 2728}
2729#else
183cad12
DM		 2730static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2731 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2732 const struct xfrm_kmaddress *k,
2733 const struct xfrm_encap_tmpl *encap)
5c79de6e
SS		 2734{
2735 return -ENOPROTOOPT;
2736}
2737#endif
d51d081d 2738
a7bd9a45 2739#define XMSGSIZE(type) sizeof(struct type)
492b558b 2740
5461fc0c 2741const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2742 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2743 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2744 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2745 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2746 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2747 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2748 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2749 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2750 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2751 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2752 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2753 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2754 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2755 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2756 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2757 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2758 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2759 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45 2760 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
880a6fab 2761 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
a7bd9a45 2762 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
2d151d39
SK		 2763 [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),
2764 [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_default),
1da177e4 2765};
5461fc0c 2766EXPORT_SYMBOL_GPL(xfrm_msg_min);
1da177e4 2767
492b558b
TG		 2768#undef XMSGSIZE
2769
5106f4a8 2770const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2771 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2772 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2773 [XFRMA_LASTUSED] = { .type = NLA_U64},
2774 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2775 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2776 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2777 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2778 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2779 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2780 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2781 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2782 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2783 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2784 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2785 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2786 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2787 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2788 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2789 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2790 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2791 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2792 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2793 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2794 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
d3623099 2795 [XFRMA_PROTO] = { .type = NLA_U8 },
870a2df4 2796 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
d77e38e6 2797 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
9b42c1f1
SK		 2798 [XFRMA_SET_MARK] = { .type = NLA_U32 },
2799 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
7e652640 2800 [XFRMA_IF_ID] = { .type = NLA_U32 },
cf5cb79f 2801};
5106f4a8 2802EXPORT_SYMBOL_GPL(xfrma_policy);
cf5cb79f 2803
880a6fab
CG		 2804static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2805 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2806 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2807};
2808
05600a79 2809static const struct xfrm_link {
5424f32e 2810 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1137b5e2 2811 int (*start)(struct netlink_callback *);
1da177e4 2812 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2813 int (*done)(struct netlink_callback *);
880a6fab
CG		 2814 const struct nla_policy *nla_pol;
2815 int nla_max;
492b558b
TG		 2816} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2817 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2818 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2819 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2820 .dump = xfrm_dump_sa,
2821 .done = xfrm_dump_sa_done },
492b558b
TG		 2822 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2823 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2824 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1137b5e2 2825 .start = xfrm_dump_policy_start,
4c563f76
TT		 2826 .dump = xfrm_dump_policy,
2827 .done = xfrm_dump_policy_done },
492b558b 2828 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2829 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2830 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2831 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2832 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2833 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2834 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2835 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2836 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2837 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2838 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2839 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
880a6fab
CG		 2840 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2841 .nla_pol = xfrma_spd_policy,
2842 .nla_max = XFRMA_SPD_MAX },
ecfd6b18 2843 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
2d151d39
SK		 2844 [XFRM_MSG_SETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_set_default },
2845 [XFRM_MSG_GETDEFAULT - XFRM_MSG_BASE] = { .doit = xfrm_get_default },
1da177e4
LT		 2846};
2847
2d4bc933
JB		 2848static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2849 struct netlink_ext_ack *extack)
1da177e4 2850{
a6483b79 2851 struct net *net = sock_net(skb->sk);
35a7aa08 2852 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2853 const struct xfrm_link *link;
5106f4a8 2854 struct nlmsghdr *nlh64 = NULL;
a7bd9a45 2855 int type, err;
1da177e4 2856
1da177e4 2857 type = nlh->nlmsg_type;
1da177e4 2858 if (type > XFRM_MSG_MAX)
1d00a4eb 2859 return -EINVAL;
1da177e4
LT		 2860
2861 type -= XFRM_MSG_BASE;
2862 link = &xfrm_dispatch[type];
2863
2864 /* All operations require privileges, even GET */
90f62cf3 2865 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 2866 return -EPERM;
1da177e4 2867
5106f4a8
DS		 2868 if (in_compat_syscall()) {
2869 struct xfrm_translator *xtr = xfrm_get_translator();
2870
2871 if (!xtr)
2872 return -EOPNOTSUPP;
2873
2874 nlh64 = xtr->rcv_msg_compat(nlh, link->nla_max,
2875 link->nla_pol, extack);
2876 xfrm_put_translator(xtr);
2877 if (IS_ERR(nlh64))
2878 return PTR_ERR(nlh64);
2879 if (nlh64)
2880 nlh = nlh64;
2881 }
2882
492b558b
TG		 2883 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2884 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2885 (nlh->nlmsg_flags & NLM_F_DUMP)) {
5106f4a8
DS		 2886 struct netlink_dump_control c = {
2887 .start = link->start,
2888 .dump = link->dump,
2889 .done = link->done,
2890 };
88fc2c84 2891
5106f4a8
DS		 2892 if (link->dump == NULL) {
2893 err = -EINVAL;
2894 goto err;
80d326fa 2895 }
5106f4a8
DS		 2896
2897 err = netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2898 goto err;
1da177e4
LT		 2899 }
2900
8cb08174
JB		 2901 err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs,
2902 link->nla_max ? : XFRMA_MAX,
2903 link->nla_pol ? : xfrma_policy, extack);
a7bd9a45 2904 if (err < 0)
5106f4a8 2905 goto err;
1da177e4 2906
5106f4a8
DS		 2907 if (link->doit == NULL) {
2908 err = -EINVAL;
2909 goto err;
2910 }
2911
2912 err = link->doit(skb, nlh, attrs);
1da177e4 2913
7c1a80e8
PS		 2914 /* We need to free skb allocated in xfrm_alloc_compat() before
2915 * returning from this function, because consume_skb() won't take
2916 * care of frag_list since netlink destructor sets
2917 * sbk->head to NULL. (see netlink_skb_destructor())
2918 */
2919 if (skb_has_frag_list(skb)) {
2920 kfree_skb(skb_shinfo(skb)->frag_list);
2921 skb_shinfo(skb)->frag_list = NULL;
2922 }
2923
5106f4a8
DS		 2924err:
2925 kvfree(nlh64);
2926 return err;
1da177e4
LT		 2927}
2928
cd40b7d3 2929static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2930{
283bc9f3
FD		 2931 struct net *net = sock_net(skb->sk);
2932
2933 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2934 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2935 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2936}
2937
a1b831f2 2938static inline unsigned int xfrm_expire_msgsize(void)
7deb2264 2939{
6f26b61e
JHS		 2940 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2941 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2942}
2943
214e005b 2944static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2945{
2946 struct xfrm_user_expire *ue;
2947 struct nlmsghdr *nlh;
1d1e34dd 2948 int err;
1da177e4 2949
15e47304 2950 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2951 if (nlh == NULL)
2952 return -EMSGSIZE;
1da177e4 2953
7b67c857 2954 ue = nlmsg_data(nlh);
1da177e4 2955 copy_to_user_state(x, &ue->state);
d51d081d 2956 ue->hard = (c->data.hard != 0) ? 1 : 0;
e3e5fc16 2957 /* clear the padding bytes */
caf283d0 2958 memset_after(ue, 0, hard);
1da177e4 2959
1d1e34dd
DM		 2960 err = xfrm_mark_put(skb, &x->mark);
2961 if (err)
2962 return err;
6f26b61e 2963
7e652640
SK		 2964 err = xfrm_if_id_put(skb, x->if_id);
2965 if (err)
2966 return err;
2967
053c095a
JB		 2968 nlmsg_end(skb, nlh);
2969 return 0;
1da177e4
LT		 2970}
2971
214e005b 2972static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2973{
fc34acd3 2974 struct net *net = xs_net(x);
1da177e4
LT		 2975 struct sk_buff *skb;
2976
7deb2264 2977 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2978 if (skb == NULL)
2979 return -ENOMEM;
2980
6f26b61e
JHS		 2981 if (build_expire(skb, x, c) < 0) {
2982 kfree_skb(skb);
2983 return -EMSGSIZE;
2984 }
1da177e4 2985
21ee543e 2986 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2987}
2988
214e005b 2989static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2990{
fc34acd3 2991 struct net *net = xs_net(x);
d51d081d 2992 struct sk_buff *skb;
2fc5f83b 2993 int err;
d51d081d 2994
d8647b79 2995 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2996 if (skb == NULL)
2997 return -ENOMEM;
2998
2fc5f83b
GS		 2999 err = build_aevent(skb, x, c);
3000 BUG_ON(err < 0);
d51d081d 3001
21ee543e 3002 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
d51d081d
JHS		 3003}
3004
214e005b 3005static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 3006{
7067802e 3007 struct net *net = c->net;
26b15dad
JHS		 3008 struct xfrm_usersa_flush *p;
3009 struct nlmsghdr *nlh;
3010 struct sk_buff *skb;
7deb2264 3011 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 3012
7deb2264 3013 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 3014 if (skb == NULL)
3015 return -ENOMEM;
26b15dad 3016
15e47304 3017 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 3018 if (nlh == NULL) {
3019 kfree_skb(skb);
3020 return -EMSGSIZE;
3021 }
26b15dad 3022
7b67c857 3023 p = nlmsg_data(nlh);
bf08867f 3024 p->proto = c->data.proto;
26b15dad 3025
9825069d 3026 nlmsg_end(skb, nlh);
26b15dad 3027
21ee543e 3028 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad
JHS		 3029}
3030
a1b831f2 3031static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
26b15dad 3032{
a1b831f2 3033 unsigned int l = 0;
1a6509d9
HX		 3034 if (x->aead)
3035 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 3036 if (x->aalg) {
3037 l += nla_total_size(sizeof(struct xfrm_algo) +
3038 (x->aalg->alg_key_len + 7) / 8);
3039 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
3040 }
26b15dad 3041 if (x->ealg)
0f99be0d 3042 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 3043 if (x->calg)
7deb2264 3044 l += nla_total_size(sizeof(*x->calg));
26b15dad 3045 if (x->encap)
7deb2264 3046 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 3047 if (x->tfcpad)
3048 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 3049 if (x->replay_esn)
3050 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
f293a5e3 3051 else
3052 l += nla_total_size(sizeof(struct xfrm_replay_state));
68325d3b
HX		 3053 if (x->security)
3054 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
3055 x->security->ctx_len);
3056 if (x->coaddr)
3057 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 3058 if (x->props.extra_flags)
3059 l += nla_total_size(sizeof(x->props.extra_flags));
d77e38e6
SK		 3060 if (x->xso.dev)
3061 l += nla_total_size(sizeof(x->xso));
9b42c1f1
SK		 3062 if (x->props.smark.v | x->props.smark.m) {
3063 l += nla_total_size(sizeof(x->props.smark.v));
3064 l += nla_total_size(sizeof(x->props.smark.m));
3065 }
7e652640
SK		 3066 if (x->if_id)
3067 l += nla_total_size(sizeof(x->if_id));
68325d3b 3068
d26f3984 3069 /* Must count x->lastused as it may become non-zero behind our back. */
de95c4a4 3070 l += nla_total_size_64bit(sizeof(u64));
26b15dad
JHS		 3071
3072 return l;
3073}
3074
214e005b 3075static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 3076{
fc34acd3 3077 struct net *net = xs_net(x);
26b15dad 3078 struct xfrm_usersa_info *p;
0603eac0 3079 struct xfrm_usersa_id *id;
26b15dad
JHS		 3080 struct nlmsghdr *nlh;
3081 struct sk_buff *skb;
a1b831f2
AD		 3082 unsigned int len = xfrm_sa_len(x);
3083 unsigned int headlen;
3084 int err;
0603eac0
HX		 3085
3086 headlen = sizeof(*p);
3087 if (c->event == XFRM_MSG_DELSA) {
7deb2264 3088 len += nla_total_size(headlen);
0603eac0 3089 headlen = sizeof(*id);
6f26b61e 3090 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 3091 }
7deb2264 3092 len += NLMSG_ALIGN(headlen);
26b15dad 3093
7deb2264 3094 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 3095 if (skb == NULL)
3096 return -ENOMEM;
26b15dad 3097
15e47304 3098 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 3099 err = -EMSGSIZE;
79b8b7f4 3100 if (nlh == NULL)
1d1e34dd 3101 goto out_free_skb;
26b15dad 3102
7b67c857 3103 p = nlmsg_data(nlh);
0603eac0 3104 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 3105 struct nlattr *attr;
3106
7b67c857 3107 id = nlmsg_data(nlh);
50329c8a 3108 memset(id, 0, sizeof(*id));
0603eac0
HX		 3109 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
3110 id->spi = x->id.spi;
3111 id->family = x->props.family;
3112 id->proto = x->id.proto;
3113
c0144bea 3114 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 3115 err = -EMSGSIZE;
c0144bea 3116 if (attr == NULL)
1d1e34dd 3117 goto out_free_skb;
c0144bea
TG		 3118
3119 p = nla_data(attr);
0603eac0 3120 }
1d1e34dd
DM		 3121 err = copy_to_user_state_extra(x, p, skb);
3122 if (err)
3123 goto out_free_skb;
26b15dad 3124
9825069d 3125 nlmsg_end(skb, nlh);
26b15dad 3126
21ee543e 3127 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad 3128
1d1e34dd 3129out_free_skb:
26b15dad 3130 kfree_skb(skb);
1d1e34dd 3131 return err;
26b15dad
JHS		 3132}
3133
214e005b 3134static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 3135{
3136
3137 switch (c->event) {
f60f6b8f 3138 case XFRM_MSG_EXPIRE:
26b15dad 3139 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 3140 case XFRM_MSG_NEWAE:
3141 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 3142 case XFRM_MSG_DELSA:
3143 case XFRM_MSG_UPDSA:
3144 case XFRM_MSG_NEWSA:
26b15dad 3145 return xfrm_notify_sa(x, c);
f60f6b8f 3146 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 3147 return xfrm_notify_sa_flush(c);
3148 default:
62db5cfd 3149 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
3150 c->event);
3151 break;
26b15dad
JHS		 3152 }
3153
3154 return 0;
3155
3156}
3157
a1b831f2
AD		 3158static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
3159 struct xfrm_policy *xp)
7deb2264
TG		 3160{
3161 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
3162 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 3163 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 3164 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
3165 + userpolicy_type_attrsize();
3166}
3167
1da177e4 3168static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 3169 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 3170{
1d1e34dd 3171 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 3172 struct xfrm_user_acquire *ua;
3173 struct nlmsghdr *nlh;
1d1e34dd 3174 int err;
1da177e4 3175
79b8b7f4
TG		 3176 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
3177 if (nlh == NULL)
3178 return -EMSGSIZE;
1da177e4 3179
7b67c857 3180 ua = nlmsg_data(nlh);
1da177e4
LT		 3181 memcpy(&ua->id, &x->id, sizeof(ua->id));
3182 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
3183 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 3184 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 3185 ua->aalgos = xt->aalgos;
3186 ua->ealgos = xt->ealgos;
3187 ua->calgos = xt->calgos;
3188 ua->seq = x->km.seq = seq;
3189
1d1e34dd
DM		 3190 err = copy_to_user_tmpl(xp, skb);
3191 if (!err)
3192 err = copy_to_user_state_sec_ctx(x, skb);
3193 if (!err)
3194 err = copy_to_user_policy_type(xp->type, skb);
3195 if (!err)
3196 err = xfrm_mark_put(skb, &xp->mark);
7e652640
SK		 3197 if (!err)
3198 err = xfrm_if_id_put(skb, xp->if_id);
1d1e34dd
DM		 3199 if (err) {
3200 nlmsg_cancel(skb, nlh);
3201 return err;
3202 }
1da177e4 3203
053c095a
JB		 3204 nlmsg_end(skb, nlh);
3205 return 0;
1da177e4
LT		 3206}
3207
3208static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 3209 struct xfrm_policy *xp)
1da177e4 3210{
a6483b79 3211 struct net *net = xs_net(x);
1da177e4 3212 struct sk_buff *skb;
2fc5f83b 3213 int err;
1da177e4 3214
7deb2264 3215 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 3216 if (skb == NULL)
3217 return -ENOMEM;
3218
2fc5f83b
GS		 3219 err = build_acquire(skb, x, xt, xp);
3220 BUG_ON(err < 0);
1da177e4 3221
21ee543e 3222 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
1da177e4
LT		 3223}
3224
3225/* User gives us xfrm_user_policy_info followed by an array of 0
3226 * or more templates.
3227 */
cb969f07 3228static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 3229 u8 *data, int len, int *dir)
3230{
fc34acd3 3231 struct net *net = sock_net(sk);
1da177e4
LT		 3232 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
3233 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
3234 struct xfrm_policy *xp;
3235 int nr;
3236
cb969f07 3237 switch (sk->sk_family) {
1da177e4
LT		 3238 case AF_INET:
3239 if (opt != IP_XFRM_POLICY) {
3240 *dir = -EOPNOTSUPP;
3241 return NULL;
3242 }
3243 break;
dfd56b8b 3244#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 3245 case AF_INET6:
3246 if (opt != IPV6_XFRM_POLICY) {
3247 *dir = -EOPNOTSUPP;
3248 return NULL;
3249 }
3250 break;
3251#endif
3252 default:
3253 *dir = -EINVAL;
3254 return NULL;
3255 }
3256
3257 *dir = -EINVAL;
3258
3259 if (len < sizeof(*p) ||
3260 verify_newpolicy_info(p))
3261 return NULL;
3262
3263 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 3264 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 3265 return NULL;
3266
a4f1bac6
HX		 3267 if (p->dir > XFRM_POLICY_OUT)
3268 return NULL;
3269
2f09a4d5 3270 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 3271 if (xp == NULL) {
3272 *dir = -ENOBUFS;
3273 return NULL;
3274 }
3275
3276 copy_from_user_policy(xp, p);
f7b6983f 3277 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 3278 copy_templates(xp, ut, nr);
3279
3280 *dir = p->dir;
3281
3282 return xp;
3283}
3284
a1b831f2 3285static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
7deb2264
TG		 3286{
3287 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3288 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3289 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 3290 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 3291 + userpolicy_type_attrsize();
3292}
3293
1da177e4 3294static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 3295 int dir, const struct km_event *c)
1da177e4
LT		 3296{
3297 struct xfrm_user_polexpire *upe;
d51d081d 3298 int hard = c->data.hard;
1d1e34dd
DM		 3299 struct nlmsghdr *nlh;
3300 int err;
1da177e4 3301
15e47304 3302 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 3303 if (nlh == NULL)
3304 return -EMSGSIZE;
1da177e4 3305
7b67c857 3306 upe = nlmsg_data(nlh);
1da177e4 3307 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 3308 err = copy_to_user_tmpl(xp, skb);
3309 if (!err)
3310 err = copy_to_user_sec_ctx(xp, skb);
3311 if (!err)
3312 err = copy_to_user_policy_type(xp->type, skb);
3313 if (!err)
3314 err = xfrm_mark_put(skb, &xp->mark);
7e652640
SK		 3315 if (!err)
3316 err = xfrm_if_id_put(skb, xp->if_id);
1d1e34dd
DM		 3317 if (err) {
3318 nlmsg_cancel(skb, nlh);
3319 return err;
3320 }
1da177e4
LT		 3321 upe->hard = !!hard;
3322
053c095a
JB		 3323 nlmsg_end(skb, nlh);
3324 return 0;
1da177e4
LT		 3325}
3326
214e005b 3327static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 3328{
fc34acd3 3329 struct net *net = xp_net(xp);
1da177e4 3330 struct sk_buff *skb;
2fc5f83b 3331 int err;
1da177e4 3332
7deb2264 3333 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 3334 if (skb == NULL)
3335 return -ENOMEM;
3336
2fc5f83b
GS		 3337 err = build_polexpire(skb, xp, dir, c);
3338 BUG_ON(err < 0);
1da177e4 3339
21ee543e 3340 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 3341}
3342
214e005b 3343static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 3344{
a1b831f2 3345 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 3346 struct net *net = xp_net(xp);
26b15dad 3347 struct xfrm_userpolicy_info *p;
0603eac0 3348 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 3349 struct nlmsghdr *nlh;
3350 struct sk_buff *skb;
a1b831f2
AD		 3351 unsigned int headlen;
3352 int err;
0603eac0
HX		 3353
3354 headlen = sizeof(*p);
3355 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 3356 len += nla_total_size(headlen);
0603eac0
HX		 3357 headlen = sizeof(*id);
3358 }
cfbfd45a 3359 len += userpolicy_type_attrsize();
295fae56 3360 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 3361 len += NLMSG_ALIGN(headlen);
26b15dad 3362
7deb2264 3363 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 3364 if (skb == NULL)
3365 return -ENOMEM;
26b15dad 3366
15e47304 3367 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 3368 err = -EMSGSIZE;
79b8b7f4 3369 if (nlh == NULL)
1d1e34dd 3370 goto out_free_skb;
26b15dad 3371
7b67c857 3372 p = nlmsg_data(nlh);
0603eac0 3373 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 3374 struct nlattr *attr;
3375
7b67c857 3376 id = nlmsg_data(nlh);
0603eac0
HX		 3377 memset(id, 0, sizeof(*id));
3378 id->dir = dir;
3379 if (c->data.byid)
3380 id->index = xp->index;
3381 else
3382 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3383
c0144bea 3384 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 3385 err = -EMSGSIZE;
c0144bea 3386 if (attr == NULL)
1d1e34dd 3387 goto out_free_skb;
c0144bea
TG		 3388
3389 p = nla_data(attr);
0603eac0 3390 }
26b15dad 3391
26b15dad 3392 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 3393 err = copy_to_user_tmpl(xp, skb);
3394 if (!err)
3395 err = copy_to_user_policy_type(xp->type, skb);
3396 if (!err)
3397 err = xfrm_mark_put(skb, &xp->mark);
7e652640
SK		 3398 if (!err)
3399 err = xfrm_if_id_put(skb, xp->if_id);
1d1e34dd
DM		 3400 if (err)
3401 goto out_free_skb;
295fae56 3402
9825069d 3403 nlmsg_end(skb, nlh);
26b15dad 3404
21ee543e 3405 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3406
1d1e34dd 3407out_free_skb:
26b15dad 3408 kfree_skb(skb);
1d1e34dd 3409 return err;
26b15dad
JHS		 3410}
3411
214e005b 3412static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 3413{
7067802e 3414 struct net *net = c->net;
26b15dad
JHS		 3415 struct nlmsghdr *nlh;
3416 struct sk_buff *skb;
1d1e34dd 3417 int err;
26b15dad 3418
7deb2264 3419 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 3420 if (skb == NULL)
3421 return -ENOMEM;
26b15dad 3422
15e47304 3423 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 3424 err = -EMSGSIZE;
79b8b7f4 3425 if (nlh == NULL)
1d1e34dd
DM		 3426 goto out_free_skb;
3427 err = copy_to_user_policy_type(c->data.type, skb);
3428 if (err)
3429 goto out_free_skb;
26b15dad 3430
9825069d 3431 nlmsg_end(skb, nlh);
26b15dad 3432
21ee543e 3433 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3434
1d1e34dd 3435out_free_skb:
26b15dad 3436 kfree_skb(skb);
1d1e34dd 3437 return err;
26b15dad
JHS		 3438}
3439
214e005b 3440static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 3441{
3442
3443 switch (c->event) {
f60f6b8f
HX		 3444 case XFRM_MSG_NEWPOLICY:
3445 case XFRM_MSG_UPDPOLICY:
3446 case XFRM_MSG_DELPOLICY:
26b15dad 3447 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 3448 case XFRM_MSG_FLUSHPOLICY:
26b15dad 3449 return xfrm_notify_policy_flush(c);
f60f6b8f 3450 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 3451 return xfrm_exp_policy_notify(xp, dir, c);
3452 default:
62db5cfd 3453 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3454 c->event);
26b15dad
JHS		 3455 }
3456
3457 return 0;
3458
3459}
3460
a1b831f2 3461static inline unsigned int xfrm_report_msgsize(void)
7deb2264
TG		 3462{
3463 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3464}
3465
97a64b45
MN		 3466static int build_report(struct sk_buff *skb, u8 proto,
3467 struct xfrm_selector *sel, xfrm_address_t *addr)
3468{
3469 struct xfrm_user_report *ur;
3470 struct nlmsghdr *nlh;
97a64b45 3471
79b8b7f4
TG		 3472 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3473 if (nlh == NULL)
3474 return -EMSGSIZE;
97a64b45 3475
7b67c857 3476 ur = nlmsg_data(nlh);
97a64b45
MN		 3477 ur->proto = proto;
3478 memcpy(&ur->sel, sel, sizeof(ur->sel));
3479
1d1e34dd
DM		 3480 if (addr) {
3481 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3482 if (err) {
3483 nlmsg_cancel(skb, nlh);
3484 return err;
3485 }
3486 }
053c095a
JB		 3487 nlmsg_end(skb, nlh);
3488 return 0;
97a64b45
MN		 3489}
3490
db983c11
AD		 3491static int xfrm_send_report(struct net *net, u8 proto,
3492 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 3493{
3494 struct sk_buff *skb;
2fc5f83b 3495 int err;
97a64b45 3496
7deb2264 3497 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 3498 if (skb == NULL)
3499 return -ENOMEM;
3500
2fc5f83b
GS		 3501 err = build_report(skb, proto, sel, addr);
3502 BUG_ON(err < 0);
97a64b45 3503
21ee543e 3504 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
97a64b45
MN		 3505}
3506
a1b831f2 3507static inline unsigned int xfrm_mapping_msgsize(void)
3a2dfbe8
MW		 3508{
3509 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3510}
3511
3512static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3513 xfrm_address_t *new_saddr, __be16 new_sport)
3514{
3515 struct xfrm_user_mapping *um;
3516 struct nlmsghdr *nlh;
3517
3518 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3519 if (nlh == NULL)
3520 return -EMSGSIZE;
3521
3522 um = nlmsg_data(nlh);
3523
3524 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3525 um->id.spi = x->id.spi;
3526 um->id.family = x->props.family;
3527 um->id.proto = x->id.proto;
3528 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3529 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3530 um->new_sport = new_sport;
3531 um->old_sport = x->encap->encap_sport;
3532 um->reqid = x->props.reqid;
3533
053c095a
JB		 3534 nlmsg_end(skb, nlh);
3535 return 0;
3a2dfbe8
MW		 3536}
3537
3538static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3539 __be16 sport)
3540{
a6483b79 3541 struct net *net = xs_net(x);
3a2dfbe8 3542 struct sk_buff *skb;
2fc5f83b 3543 int err;
3a2dfbe8
MW		 3544
3545 if (x->id.proto != IPPROTO_ESP)
3546 return -EINVAL;
3547
3548 if (!x->encap)
3549 return -EINVAL;
3550
3551 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3552 if (skb == NULL)
3553 return -ENOMEM;
3554
2fc5f83b
GS		 3555 err = build_mapping(skb, x, ipaddr, sport);
3556 BUG_ON(err < 0);
3a2dfbe8 3557
21ee543e 3558 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3a2dfbe8
MW		 3559}
3560
0f24558e
HG		 3561static bool xfrm_is_alive(const struct km_event *c)
3562{
3563 return (bool)xfrm_acquire_is_on(c->net);
3564}
3565
1da177e4 3566static struct xfrm_mgr netlink_mgr = {
1da177e4
LT		 3567 .notify = xfrm_send_state_notify,
3568 .acquire = xfrm_send_acquire,
3569 .compile_policy = xfrm_compile_policy,
3570 .notify_policy = xfrm_send_policy_notify,
97a64b45 3571 .report = xfrm_send_report,
5c79de6e 3572 .migrate = xfrm_send_migrate,
3a2dfbe8 3573 .new_mapping = xfrm_send_mapping,
0f24558e 3574 .is_alive = xfrm_is_alive,
1da177e4
LT		 3575};
3576
a6483b79 3577static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 3578{
be33690d 3579 struct sock *nlsk;
a31f2d17
PNA		 3580 struct netlink_kernel_cfg cfg = {
3581 .groups = XFRMNLGRP_MAX,
3582 .input = xfrm_netlink_rcv,
3583 };
be33690d 3584
9f00d977 3585 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3586 if (nlsk == NULL)
1da177e4 3587 return -ENOMEM;
d79d792e 3588 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3589 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3590 return 0;
3591}
3592
6218fe18
FW		 3593static void __net_exit xfrm_user_net_pre_exit(struct net *net)
3594{
3595 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
3596}
3597
d79d792e 3598static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3599{
d79d792e 3600 struct net *net;
6218fe18 3601
d79d792e
EB		 3602 list_for_each_entry(net, net_exit_list, exit_list)
3603 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3604}
3605
a6483b79 3606static struct pernet_operations xfrm_user_net_ops = {
d79d792e 3607 .init = xfrm_user_net_init,
6218fe18 3608 .pre_exit = xfrm_user_net_pre_exit,
d79d792e 3609 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3610};
3611
3612static int __init xfrm_user_init(void)
3613{
3614 int rv;
3615
3616 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3617
3618 rv = register_pernet_subsys(&xfrm_user_net_ops);
3619 if (rv < 0)
3620 return rv;
3621 rv = xfrm_register_km(&netlink_mgr);
3622 if (rv < 0)
3623 unregister_pernet_subsys(&xfrm_user_net_ops);
3624 return rv;
3625}
3626
3627static void __exit xfrm_user_exit(void)
3628{
3629 xfrm_unregister_km(&netlink_mgr);
3630 unregister_pernet_subsys(&xfrm_user_net_ops);
3631}
3632
1da177e4
LT		 3633module_init(xfrm_user_init);
3634module_exit(xfrm_user_exit);
3635MODULE_LICENSE("GPL");
4fdb3bb7 3636MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
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