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UBUNTU: Ubuntu-5.3.0-29.31
[mirror_ubuntu-eoan-kernel.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 (davem@redhat.com)
5 *
6 * Changes:
7 * Mitsuru KANDA @USAGI
8 * Kazunori MIYAZAWA @USAGI
9 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
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);
cf5cb79f 113 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 114 return -EINVAL;
115
116 return 0;
117}
118
d8647b79
SK		 119static inline int verify_replay(struct xfrm_usersa_info *p,
120 struct nlattr **attrs)
121{
122 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
ecd79187 123 struct xfrm_replay_state_esn *rs;
d8647b79 124
d97ca5d7
FW		 125 if (!rt)
126 return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0;
ecd79187 127
d97ca5d7 128 rs = nla_data(rt);
ecd79187 129
d97ca5d7
FW		 130 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
131 return -EINVAL;
7833aa05 132
d97ca5d7
FW		 133 if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
134 nla_len(rt) != sizeof(*rs))
135 return -EINVAL;
d8647b79 136
01714109
FD		 137 /* As only ESP and AH support ESN feature. */
138 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
02aadf72
SK		 139 return -EINVAL;
140
d8647b79
SK		 141 if (p->replay_window != 0)
142 return -EINVAL;
143
144 return 0;
145}
df71837d 146
1da177e4 147static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 148 struct nlattr **attrs)
1da177e4
LT		 149{
150 int err;
151
152 err = -EINVAL;
153 switch (p->family) {
b38ff407
AG		 154 case AF_INET:
155 break;
156
157 case AF_INET6:
158#if IS_ENABLED(CONFIG_IPV6)
159 break;
160#else
161 err = -EAFNOSUPPORT;
162 goto out;
163#endif
164
165 default:
166 goto out;
167 }
168
169 switch (p->sel.family) {
b8d6d007
ND		 170 case AF_UNSPEC:
171 break;
172
1da177e4 173 case AF_INET:
07bf7908
SK		 174 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
175 goto out;
176
1da177e4
LT		 177 break;
178
179 case AF_INET6:
dfd56b8b 180#if IS_ENABLED(CONFIG_IPV6)
07bf7908
SK		 181 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
182 goto out;
183
1da177e4
LT		 184 break;
185#else
186 err = -EAFNOSUPPORT;
187 goto out;
188#endif
189
190 default:
191 goto out;
3ff50b79 192 }
1da177e4
LT		 193
194 err = -EINVAL;
195 switch (p->id.proto) {
196 case IPPROTO_AH:
4447bb33
MW		 197 if ((!attrs[XFRMA_ALG_AUTH] &&
198 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 199 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 200 attrs[XFRMA_ALG_CRYPT] ||
35d2856b 201 attrs[XFRMA_ALG_COMP] ||
a0e5ef53 202 attrs[XFRMA_TFCPAD])
1da177e4
LT		 203 goto out;
204 break;
205
206 case IPPROTO_ESP:
1a6509d9
HX		 207 if (attrs[XFRMA_ALG_COMP])
208 goto out;
209 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 210 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 211 !attrs[XFRMA_ALG_CRYPT] &&
212 !attrs[XFRMA_ALG_AEAD])
213 goto out;
214 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 215 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 216 attrs[XFRMA_ALG_CRYPT]) &&
217 attrs[XFRMA_ALG_AEAD])
1da177e4 218 goto out;
35d2856b
MW		 219 if (attrs[XFRMA_TFCPAD] &&
220 p->mode != XFRM_MODE_TUNNEL)
221 goto out;
1da177e4
LT		 222 break;
223
224 case IPPROTO_COMP:
35a7aa08 225 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 226 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 227 attrs[XFRMA_ALG_AUTH] ||
4447bb33 228 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b 229 attrs[XFRMA_ALG_CRYPT] ||
a0e5ef53
TB		 230 attrs[XFRMA_TFCPAD] ||
231 (ntohl(p->id.spi) >= 0x10000))
1da177e4
LT		 232 goto out;
233 break;
234
dfd56b8b 235#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 236 case IPPROTO_DSTOPTS:
237 case IPPROTO_ROUTING:
35a7aa08
TG		 238 if (attrs[XFRMA_ALG_COMP] ||
239 attrs[XFRMA_ALG_AUTH] ||
4447bb33 240 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 241 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 242 attrs[XFRMA_ALG_CRYPT] ||
243 attrs[XFRMA_ENCAP] ||
244 attrs[XFRMA_SEC_CTX] ||
35d2856b 245 attrs[XFRMA_TFCPAD] ||
35a7aa08 246 !attrs[XFRMA_COADDR])
e23c7194
MN		 247 goto out;
248 break;
249#endif
250
1da177e4
LT		 251 default:
252 goto out;
3ff50b79 253 }
1da177e4 254
1a6509d9
HX		 255 if ((err = verify_aead(attrs)))
256 goto out;
4447bb33
MW		 257 if ((err = verify_auth_trunc(attrs)))
258 goto out;
35a7aa08 259 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 260 goto out;
35a7aa08 261 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 262 goto out;
35a7aa08 263 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 264 goto out;
35a7aa08 265 if ((err = verify_sec_ctx_len(attrs)))
df71837d 266 goto out;
d8647b79
SK		 267 if ((err = verify_replay(p, attrs)))
268 goto out;
1da177e4
LT		 269
270 err = -EINVAL;
271 switch (p->mode) {
7e49e6de
MN		 272 case XFRM_MODE_TRANSPORT:
273 case XFRM_MODE_TUNNEL:
060f02a3 274 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 275 case XFRM_MODE_BEET:
1da177e4
LT		 276 break;
277
278 default:
279 goto out;
3ff50b79 280 }
1da177e4
LT		 281
282 err = 0;
283
284out:
285 return err;
286}
287
288static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 289 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 290 struct nlattr *rta)
1da177e4 291{
1da177e4
LT		 292 struct xfrm_algo *p, *ualg;
293 struct xfrm_algo_desc *algo;
294
295 if (!rta)
296 return 0;
297
5424f32e 298 ualg = nla_data(rta);
1da177e4
LT		 299
300 algo = get_byname(ualg->alg_name, 1);
301 if (!algo)
302 return -ENOSYS;
303 *props = algo->desc.sadb_alg_id;
304
0f99be0d 305 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 306 if (!p)
307 return -ENOMEM;
308
04ff1260 309 strcpy(p->alg_name, algo->name);
1da177e4
LT		 310 *algpp = p;
311 return 0;
312}
313
69b0137f
HX		 314static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
315{
316 struct xfrm_algo *p, *ualg;
317 struct xfrm_algo_desc *algo;
318
319 if (!rta)
320 return 0;
321
322 ualg = nla_data(rta);
323
324 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
325 if (!algo)
326 return -ENOSYS;
327 x->props.ealgo = algo->desc.sadb_alg_id;
328
329 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
330 if (!p)
331 return -ENOMEM;
332
333 strcpy(p->alg_name, algo->name);
334 x->ealg = p;
335 x->geniv = algo->uinfo.encr.geniv;
336 return 0;
337}
338
4447bb33
MW		 339static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
340 struct nlattr *rta)
341{
342 struct xfrm_algo *ualg;
343 struct xfrm_algo_auth *p;
344 struct xfrm_algo_desc *algo;
345
346 if (!rta)
347 return 0;
348
349 ualg = nla_data(rta);
350
351 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
352 if (!algo)
353 return -ENOSYS;
354 *props = algo->desc.sadb_alg_id;
355
356 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
357 if (!p)
358 return -ENOMEM;
359
360 strcpy(p->alg_name, algo->name);
361 p->alg_key_len = ualg->alg_key_len;
362 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
363 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
364
365 *algpp = p;
366 return 0;
367}
368
369static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
370 struct nlattr *rta)
371{
372 struct xfrm_algo_auth *p, *ualg;
373 struct xfrm_algo_desc *algo;
374
375 if (!rta)
376 return 0;
377
378 ualg = nla_data(rta);
379
380 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
381 if (!algo)
382 return -ENOSYS;
689f1c9d 383 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 384 return -EINVAL;
385 *props = algo->desc.sadb_alg_id;
386
387 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
388 if (!p)
389 return -ENOMEM;
390
391 strcpy(p->alg_name, algo->name);
392 if (!p->alg_trunc_len)
393 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
394
395 *algpp = p;
396 return 0;
397}
398
69b0137f 399static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
1a6509d9
HX		 400{
401 struct xfrm_algo_aead *p, *ualg;
402 struct xfrm_algo_desc *algo;
403
404 if (!rta)
405 return 0;
406
407 ualg = nla_data(rta);
408
409 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
410 if (!algo)
411 return -ENOSYS;
69b0137f 412 x->props.ealgo = algo->desc.sadb_alg_id;
1a6509d9
HX		 413
414 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
415 if (!p)
416 return -ENOMEM;
417
418 strcpy(p->alg_name, algo->name);
69b0137f
HX		 419 x->aead = p;
420 x->geniv = algo->uinfo.aead.geniv;
1a6509d9
HX		 421 return 0;
422}
423
e2b19125
SK		 424static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
425 struct nlattr *rp)
426{
427 struct xfrm_replay_state_esn *up;
5e708e47 428 unsigned int ulen;
e2b19125
SK		 429
430 if (!replay_esn || !rp)
431 return 0;
432
433 up = nla_data(rp);
ecd79187 434 ulen = xfrm_replay_state_esn_len(up);
e2b19125 435
f843ee6d
AW		 436 /* Check the overall length and the internal bitmap length to avoid
437 * potential overflow. */
5e708e47 438 if (nla_len(rp) < (int)ulen ||
f843ee6d
AW		 439 xfrm_replay_state_esn_len(replay_esn) != ulen ||
440 replay_esn->bmp_len != up->bmp_len)
e2b19125
SK		 441 return -EINVAL;
442
677e806d
AW		 443 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
444 return -EINVAL;
445
e2b19125
SK		 446 return 0;
447}
448
d8647b79
SK		 449static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
450 struct xfrm_replay_state_esn **preplay_esn,
451 struct nlattr *rta)
452{
453 struct xfrm_replay_state_esn *p, *pp, *up;
5e708e47 454 unsigned int klen, ulen;
d8647b79
SK		 455
456 if (!rta)
457 return 0;
458
459 up = nla_data(rta);
ecd79187 460 klen = xfrm_replay_state_esn_len(up);
5e708e47 461 ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);
d8647b79 462
ecd79187 463 p = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 464 if (!p)
465 return -ENOMEM;
466
ecd79187 467 pp = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 468 if (!pp) {
469 kfree(p);
470 return -ENOMEM;
471 }
472
ecd79187
MK		 473 memcpy(p, up, ulen);
474 memcpy(pp, up, ulen);
475
d8647b79
SK		 476 *replay_esn = p;
477 *preplay_esn = pp;
478
479 return 0;
480}
481
a1b831f2 482static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 483{
a1b831f2 484 unsigned int len = 0;
df71837d
TJ		 485
486 if (xfrm_ctx) {
487 len += sizeof(struct xfrm_user_sec_ctx);
488 len += xfrm_ctx->ctx_len;
489 }
490 return len;
491}
492
1da177e4
LT		 493static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
494{
495 memcpy(&x->id, &p->id, sizeof(x->id));
496 memcpy(&x->sel, &p->sel, sizeof(x->sel));
497 memcpy(&x->lft, &p->lft, sizeof(x->lft));
498 x->props.mode = p->mode;
33fce60d
FD		 499 x->props.replay_window = min_t(unsigned int, p->replay_window,
500 sizeof(x->replay.bitmap) * 8);
1da177e4
LT		 501 x->props.reqid = p->reqid;
502 x->props.family = p->family;
54489c14 503 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 504 x->props.flags = p->flags;
196b0036 505
ccf9b3b8 506 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 507 x->sel.family = p->family;
1da177e4
LT		 508}
509
d51d081d
JHS		 510/*
511 * someday when pfkey also has support, we could have the code
512 * somehow made shareable and move it to xfrm_state.c - JHS
513 *
514*/
e3ac104d
MK		 515static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
516 int update_esn)
d51d081d 517{
5424f32e 518 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
e3ac104d 519 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
5424f32e
TG		 520 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
521 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
522 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 523
d8647b79
SK		 524 if (re) {
525 struct xfrm_replay_state_esn *replay_esn;
526 replay_esn = nla_data(re);
527 memcpy(x->replay_esn, replay_esn,
528 xfrm_replay_state_esn_len(replay_esn));
529 memcpy(x->preplay_esn, replay_esn,
530 xfrm_replay_state_esn_len(replay_esn));
531 }
532
d51d081d
JHS		 533 if (rp) {
534 struct xfrm_replay_state *replay;
5424f32e 535 replay = nla_data(rp);
d51d081d
JHS		 536 memcpy(&x->replay, replay, sizeof(*replay));
537 memcpy(&x->preplay, replay, sizeof(*replay));
538 }
539
540 if (lt) {
541 struct xfrm_lifetime_cur *ltime;
5424f32e 542 ltime = nla_data(lt);
d51d081d
JHS		 543 x->curlft.bytes = ltime->bytes;
544 x->curlft.packets = ltime->packets;
545 x->curlft.add_time = ltime->add_time;
546 x->curlft.use_time = ltime->use_time;
547 }
548
cf5cb79f 549 if (et)
5424f32e 550 x->replay_maxage = nla_get_u32(et);
d51d081d 551
cf5cb79f 552 if (rt)
5424f32e 553 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 554}
555
9b42c1f1
SK		 556static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
557{
558 if (attrs[XFRMA_SET_MARK]) {
559 m->v = nla_get_u32(attrs[XFRMA_SET_MARK]);
560 if (attrs[XFRMA_SET_MARK_MASK])
561 m->m = nla_get_u32(attrs[XFRMA_SET_MARK_MASK]);
562 else
563 m->m = 0xffffffff;
564 } else {
565 m->v = m->m = 0;
566 }
567}
568
fc34acd3
AD		 569static struct xfrm_state *xfrm_state_construct(struct net *net,
570 struct xfrm_usersa_info *p,
5424f32e 571 struct nlattr **attrs,
1da177e4
LT		 572 int *errp)
573{
fc34acd3 574 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 575 int err = -ENOMEM;
576
577 if (!x)
578 goto error_no_put;
579
580 copy_from_user_state(x, p);
581
a947b0a9
ND		 582 if (attrs[XFRMA_SA_EXTRA_FLAGS])
583 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
584
69b0137f 585 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
1a6509d9 586 goto error;
4447bb33
MW		 587 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
588 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 589 goto error;
4447bb33
MW		 590 if (!x->props.aalgo) {
591 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
592 attrs[XFRMA_ALG_AUTH])))
593 goto error;
594 }
69b0137f 595 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 596 goto error;
597 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
598 xfrm_calg_get_byname,
35a7aa08 599 attrs[XFRMA_ALG_COMP])))
1da177e4 600 goto error;
fd21150a
TG		 601
602 if (attrs[XFRMA_ENCAP]) {
603 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
604 sizeof(*x->encap), GFP_KERNEL);
605 if (x->encap == NULL)
606 goto error;
607 }
608
35d2856b
MW		 609 if (attrs[XFRMA_TFCPAD])
610 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
611
fd21150a
TG		 612 if (attrs[XFRMA_COADDR]) {
613 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
614 sizeof(*x->coaddr), GFP_KERNEL);
615 if (x->coaddr == NULL)
616 goto error;
617 }
618
6f26b61e
JHS		 619 xfrm_mark_get(attrs, &x->mark);
620
9b42c1f1 621 xfrm_smark_init(attrs, &x->props.smark);
077fbac4 622
7e652640
SK		 623 if (attrs[XFRMA_IF_ID])
624 x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
077fbac4 625
ffdb5211 626 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
1da177e4
LT		 627 if (err)
628 goto error;
629
2f30ea50
MK		 630 if (attrs[XFRMA_SEC_CTX]) {
631 err = security_xfrm_state_alloc(x,
632 nla_data(attrs[XFRMA_SEC_CTX]));
633 if (err)
634 goto error;
635 }
df71837d 636
d8647b79
SK		 637 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
638 attrs[XFRMA_REPLAY_ESN_VAL])))
639 goto error;
640
1da177e4 641 x->km.seq = p->seq;
b27aeadb 642 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 643 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 644 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 645
9fdc4883
SK		 646 if ((err = xfrm_init_replay(x)))
647 goto error;
d51d081d 648
9fdc4883 649 /* override default values from above */
e3ac104d 650 xfrm_update_ae_params(x, attrs, 0);
1da177e4 651
cc01572e
YK		 652 /* configure the hardware if offload is requested */
653 if (attrs[XFRMA_OFFLOAD_DEV]) {
654 err = xfrm_dev_state_add(net, x,
655 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
656 if (err)
657 goto error;
658 }
659
1da177e4
LT		 660 return x;
661
662error:
663 x->km.state = XFRM_STATE_DEAD;
664 xfrm_state_put(x);
665error_no_put:
666 *errp = err;
667 return NULL;
668}
669
22e70050 670static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 671 struct nlattr **attrs)
1da177e4 672{
fc34acd3 673 struct net *net = sock_net(skb->sk);
7b67c857 674 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 675 struct xfrm_state *x;
676 int err;
26b15dad 677 struct km_event c;
1da177e4 678
35a7aa08 679 err = verify_newsa_info(p, attrs);
1da177e4
LT		 680 if (err)
681 return err;
682
fc34acd3 683 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 684 if (!x)
685 return err;
686
26b15dad 687 xfrm_state_hold(x);
1da177e4
LT		 688 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
689 err = xfrm_state_add(x);
690 else
691 err = xfrm_state_update(x);
692
2e71029e 693 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 694
1da177e4
LT		 695 if (err < 0) {
696 x->km.state = XFRM_STATE_DEAD;
c5d4d7d8 697 xfrm_dev_state_delete(x);
21380b81 698 __xfrm_state_put(x);
7d6dfe1f 699 goto out;
1da177e4
LT		 700 }
701
cc01572e
YK		 702 if (x->km.state == XFRM_STATE_VOID)
703 x->km.state = XFRM_STATE_VALID;
704
26b15dad 705 c.seq = nlh->nlmsg_seq;
15e47304 706 c.portid = nlh->nlmsg_pid;
f60f6b8f 707 c.event = nlh->nlmsg_type;
26b15dad
JHS		 708
709 km_state_notify(x, &c);
7d6dfe1f 710out:
26b15dad 711 xfrm_state_put(x);
1da177e4
LT		 712 return err;
713}
714
fc34acd3
AD		 715static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
716 struct xfrm_usersa_id *p,
5424f32e 717 struct nlattr **attrs,
eb2971b6
MN		 718 int *errp)
719{
720 struct xfrm_state *x = NULL;
6f26b61e 721 struct xfrm_mark m;
eb2971b6 722 int err;
6f26b61e 723 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 724
725 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
726 err = -ESRCH;
6f26b61e 727 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 728 } else {
729 xfrm_address_t *saddr = NULL;
730
35a7aa08 731 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 732 if (!saddr) {
733 err = -EINVAL;
734 goto out;
735 }
736
9abbffee 737 err = -ESRCH;
6f26b61e
JHS		 738 x = xfrm_state_lookup_byaddr(net, mark,
739 &p->daddr, saddr,
221df1ed 740 p->proto, p->family);
eb2971b6
MN		 741 }
742
743 out:
744 if (!x && errp)
745 *errp = err;
746 return x;
747}
748
22e70050 749static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 750 struct nlattr **attrs)
1da177e4 751{
fc34acd3 752 struct net *net = sock_net(skb->sk);
1da177e4 753 struct xfrm_state *x;
eb2971b6 754 int err = -ESRCH;
26b15dad 755 struct km_event c;
7b67c857 756 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4 757
fc34acd3 758 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 759 if (x == NULL)
eb2971b6 760 return err;
1da177e4 761
6f68dc37 762 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 763 goto out;
764
1da177e4 765 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 766 err = -EPERM;
767 goto out;
1da177e4
LT		 768 }
769
26b15dad 770 err = xfrm_state_delete(x);
161a09e7 771
c8c05a8e
CZ		 772 if (err < 0)
773 goto out;
26b15dad
JHS		 774
775 c.seq = nlh->nlmsg_seq;
15e47304 776 c.portid = nlh->nlmsg_pid;
f60f6b8f 777 c.event = nlh->nlmsg_type;
26b15dad 778 km_state_notify(x, &c);
1da177e4 779
c8c05a8e 780out:
2e71029e 781 xfrm_audit_state_delete(x, err ? 0 : 1, true);
c8c05a8e 782 xfrm_state_put(x);
26b15dad 783 return err;
1da177e4
LT		 784}
785
786static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
787{
f778a636 788 memset(p, 0, sizeof(*p));
1da177e4
LT		 789 memcpy(&p->id, &x->id, sizeof(p->id));
790 memcpy(&p->sel, &x->sel, sizeof(p->sel));
791 memcpy(&p->lft, &x->lft, sizeof(p->lft));
792 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
e33d4f13
SV		 793 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
794 put_unaligned(x->stats.replay, &p->stats.replay);
795 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
54489c14 796 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 797 p->mode = x->props.mode;
798 p->replay_window = x->props.replay_window;
799 p->reqid = x->props.reqid;
800 p->family = x->props.family;
801 p->flags = x->props.flags;
802 p->seq = x->km.seq;
803}
804
805struct xfrm_dump_info {
806 struct sk_buff *in_skb;
807 struct sk_buff *out_skb;
808 u32 nlmsg_seq;
809 u16 nlmsg_flags;
1da177e4
LT		 810};
811
c0144bea
TG		 812static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
813{
c0144bea
TG		 814 struct xfrm_user_sec_ctx *uctx;
815 struct nlattr *attr;
68325d3b 816 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 817
818 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
819 if (attr == NULL)
820 return -EMSGSIZE;
821
822 uctx = nla_data(attr);
823 uctx->exttype = XFRMA_SEC_CTX;
824 uctx->len = ctx_size;
825 uctx->ctx_doi = s->ctx_doi;
826 uctx->ctx_alg = s->ctx_alg;
827 uctx->ctx_len = s->ctx_len;
828 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
829
830 return 0;
831}
832
d77e38e6
SK		 833static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
834{
835 struct xfrm_user_offload *xuo;
836 struct nlattr *attr;
837
838 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
839 if (attr == NULL)
840 return -EMSGSIZE;
841
842 xuo = nla_data(attr);
5fe0d4bd 843 memset(xuo, 0, sizeof(*xuo));
d77e38e6
SK		 844 xuo->ifindex = xso->dev->ifindex;
845 xuo->flags = xso->flags;
846
847 return 0;
848}
849
4447bb33
MW		 850static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
851{
852 struct xfrm_algo *algo;
853 struct nlattr *nla;
854
855 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
856 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
857 if (!nla)
858 return -EMSGSIZE;
859
860 algo = nla_data(nla);
4c87308b 861 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
4447bb33
MW		 862 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
863 algo->alg_key_len = auth->alg_key_len;
864
865 return 0;
866}
867
9b42c1f1
SK		 868static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
869{
870 int ret = 0;
871
872 if (m->v | m->m) {
873 ret = nla_put_u32(skb, XFRMA_SET_MARK, m->v);
874 if (!ret)
875 ret = nla_put_u32(skb, XFRMA_SET_MARK_MASK, m->m);
876 }
877 return ret;
878}
879
68325d3b
HX		 880/* Don't change this without updating xfrm_sa_len! */
881static int copy_to_user_state_extra(struct xfrm_state *x,
882 struct xfrm_usersa_info *p,
883 struct sk_buff *skb)
1da177e4 884{
1d1e34dd 885 int ret = 0;
d0fde795 886
1d1e34dd 887 copy_to_user_state(x, p);
68325d3b 888
a947b0a9
ND		 889 if (x->props.extra_flags) {
890 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
891 x->props.extra_flags);
892 if (ret)
893 goto out;
894 }
895
1d1e34dd
DM		 896 if (x->coaddr) {
897 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
898 if (ret)
899 goto out;
900 }
901 if (x->lastused) {
de95c4a4
ND		 902 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
903 XFRMA_PAD);
1d1e34dd
DM		 904 if (ret)
905 goto out;
906 }
907 if (x->aead) {
908 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
909 if (ret)
910 goto out;
911 }
912 if (x->aalg) {
913 ret = copy_to_user_auth(x->aalg, skb);
914 if (!ret)
915 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
916 xfrm_alg_auth_len(x->aalg), x->aalg);
917 if (ret)
918 goto out;
919 }
920 if (x->ealg) {
921 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
922 if (ret)
923 goto out;
924 }
925 if (x->calg) {
926 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
927 if (ret)
928 goto out;
929 }
930 if (x->encap) {
931 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
932 if (ret)
933 goto out;
934 }
935 if (x->tfcpad) {
936 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
937 if (ret)
938 goto out;
939 }
940 ret = xfrm_mark_put(skb, &x->mark);
941 if (ret)
942 goto out;
9b42c1f1
SK		 943
944 ret = xfrm_smark_put(skb, &x->props.smark);
945 if (ret)
946 goto out;
947
f293a5e3 948 if (x->replay_esn)
1d1e34dd
DM		 949 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
950 xfrm_replay_state_esn_len(x->replay_esn),
951 x->replay_esn);
f293a5e3 952 else
953 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
954 &x->replay);
955 if (ret)
956 goto out;
d77e38e6
SK		 957 if(x->xso.dev)
958 ret = copy_user_offload(&x->xso, skb);
959 if (ret)
960 goto out;
7e652640
SK		 961 if (x->if_id) {
962 ret = nla_put_u32(skb, XFRMA_IF_ID, x->if_id);
077fbac4
LC		 963 if (ret)
964 goto out;
965 }
8598112d
SK		 966 if (x->security)
967 ret = copy_sec_ctx(x->security, skb);
1d1e34dd
DM		 968out:
969 return ret;
68325d3b
HX		 970}
971
972static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
973{
974 struct xfrm_dump_info *sp = ptr;
975 struct sk_buff *in_skb = sp->in_skb;
976 struct sk_buff *skb = sp->out_skb;
977 struct xfrm_usersa_info *p;
978 struct nlmsghdr *nlh;
979 int err;
980
15e47304 981 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 982 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
983 if (nlh == NULL)
984 return -EMSGSIZE;
985
986 p = nlmsg_data(nlh);
987
988 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 989 if (err) {
990 nlmsg_cancel(skb, nlh);
991 return err;
992 }
9825069d 993 nlmsg_end(skb, nlh);
1da177e4 994 return 0;
1da177e4
LT		 995}
996
4c563f76
TT		 997static int xfrm_dump_sa_done(struct netlink_callback *cb)
998{
999 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 1000 struct sock *sk = cb->skb->sk;
1001 struct net *net = sock_net(sk);
1002
1ba5bf99
VN		 1003 if (cb->args[0])
1004 xfrm_state_walk_done(walk, net);
4c563f76
TT		 1005 return 0;
1006}
1007
d3623099 1008static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
1da177e4
LT		 1009static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
1010{
fc34acd3 1011 struct net *net = sock_net(skb->sk);
4c563f76 1012 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 1013 struct xfrm_dump_info info;
1014
4c563f76
TT		 1015 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
1016 sizeof(cb->args) - sizeof(cb->args[0]));
1017
1da177e4
LT		 1018 info.in_skb = cb->skb;
1019 info.out_skb = skb;
1020 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1021 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1022
1023 if (!cb->args[0]) {
d3623099 1024 struct nlattr *attrs[XFRMA_MAX+1];
870a2df4 1025 struct xfrm_address_filter *filter = NULL;
d3623099
ND		 1026 u8 proto = 0;
1027 int err;
1028
8cb08174
JB		 1029 err = nlmsg_parse_deprecated(cb->nlh, 0, attrs, XFRMA_MAX,
1030 xfrma_policy, cb->extack);
d3623099
ND		 1031 if (err < 0)
1032 return err;
1033
870a2df4 1034 if (attrs[XFRMA_ADDRESS_FILTER]) {
df367561
AH		 1035 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
1036 sizeof(*filter), GFP_KERNEL);
d3623099
ND		 1037 if (filter == NULL)
1038 return -ENOMEM;
d3623099
ND		 1039 }
1040
1041 if (attrs[XFRMA_PROTO])
1042 proto = nla_get_u8(attrs[XFRMA_PROTO]);
1043
1044 xfrm_state_walk_init(walk, proto, filter);
1ba5bf99 1045 cb->args[0] = 1;
4c563f76
TT		 1046 }
1047
fc34acd3 1048 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 1049
1050 return skb->len;
1051}
1052
1053static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
1054 struct xfrm_state *x, u32 seq)
1055{
1056 struct xfrm_dump_info info;
1057 struct sk_buff *skb;
864745d2 1058 int err;
1da177e4 1059
7deb2264 1060 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 1061 if (!skb)
1062 return ERR_PTR(-ENOMEM);
1063
1da177e4
LT		 1064 info.in_skb = in_skb;
1065 info.out_skb = skb;
1066 info.nlmsg_seq = seq;
1067 info.nlmsg_flags = 0;
1da177e4 1068
864745d2
MK		 1069 err = dump_one_state(x, 0, &info);
1070 if (err) {
1da177e4 1071 kfree_skb(skb);
864745d2 1072 return ERR_PTR(err);
1da177e4
LT		 1073 }
1074
1075 return skb;
1076}
1077
21ee543e
MK		 1078/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1079 * Must be called with RCU read lock.
1080 */
1081static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1082 u32 pid, unsigned int group)
1083{
1084 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1085
86126b77
FW		 1086 if (!nlsk) {
1087 kfree_skb(skb);
1088 return -EPIPE;
1089 }
1090
1091 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
21ee543e
MK		 1092}
1093
a1b831f2 1094static inline unsigned int xfrm_spdinfo_msgsize(void)
7deb2264
TG		 1095{
1096 return NLMSG_ALIGN(4)
1097 + nla_total_size(sizeof(struct xfrmu_spdinfo))
880a6fab
CG		 1098 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1099 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1100 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
7deb2264
TG		 1101}
1102
e071041b 1103static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 1104 u32 portid, u32 seq, u32 flags)
ecfd6b18 1105{
5a6d3416
JHS		 1106 struct xfrmk_spdinfo si;
1107 struct xfrmu_spdinfo spc;
1108 struct xfrmu_spdhinfo sph;
880a6fab 1109 struct xfrmu_spdhthresh spt4, spt6;
ecfd6b18 1110 struct nlmsghdr *nlh;
1d1e34dd 1111 int err;
ecfd6b18 1112 u32 *f;
880a6fab 1113 unsigned lseq;
ecfd6b18 1114
15e47304 1115 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 1116 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 1117 return -EMSGSIZE;
1118
1119 f = nlmsg_data(nlh);
1120 *f = flags;
e071041b 1121 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 1122 spc.incnt = si.incnt;
1123 spc.outcnt = si.outcnt;
1124 spc.fwdcnt = si.fwdcnt;
1125 spc.inscnt = si.inscnt;
1126 spc.outscnt = si.outscnt;
1127 spc.fwdscnt = si.fwdscnt;
1128 sph.spdhcnt = si.spdhcnt;
1129 sph.spdhmcnt = si.spdhmcnt;
1130
880a6fab
CG		 1131 do {
1132 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1133
1134 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1135 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1136 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1137 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1138 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1139
1d1e34dd
DM		 1140 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1141 if (!err)
1142 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
880a6fab
CG		 1143 if (!err)
1144 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1145 if (!err)
1146 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1d1e34dd
DM		 1147 if (err) {
1148 nlmsg_cancel(skb, nlh);
1149 return err;
1150 }
ecfd6b18 1151
053c095a
JB		 1152 nlmsg_end(skb, nlh);
1153 return 0;
ecfd6b18
JHS		 1154}
1155
880a6fab
CG		 1156static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1157 struct nlattr **attrs)
1158{
1159 struct net *net = sock_net(skb->sk);
1160 struct xfrmu_spdhthresh *thresh4 = NULL;
1161 struct xfrmu_spdhthresh *thresh6 = NULL;
1162
1163 /* selector prefixlen thresholds to hash policies */
1164 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1165 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1166
1167 if (nla_len(rta) < sizeof(*thresh4))
1168 return -EINVAL;
1169 thresh4 = nla_data(rta);
1170 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1171 return -EINVAL;
1172 }
1173 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1174 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1175
1176 if (nla_len(rta) < sizeof(*thresh6))
1177 return -EINVAL;
1178 thresh6 = nla_data(rta);
1179 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1180 return -EINVAL;
1181 }
1182
1183 if (thresh4 || thresh6) {
1184 write_seqlock(&net->xfrm.policy_hthresh.lock);
1185 if (thresh4) {
1186 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1187 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1188 }
1189 if (thresh6) {
1190 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1191 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1192 }
1193 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1194
1195 xfrm_policy_hash_rebuild(net);
1196 }
1197
1198 return 0;
1199}
1200
ecfd6b18 1201static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1202 struct nlattr **attrs)
ecfd6b18 1203{
a6483b79 1204 struct net *net = sock_net(skb->sk);
ecfd6b18 1205 struct sk_buff *r_skb;
7b67c857 1206 u32 *flags = nlmsg_data(nlh);
15e47304 1207 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 1208 u32 seq = nlh->nlmsg_seq;
2fc5f83b 1209 int err;
ecfd6b18 1210
7deb2264 1211 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 1212 if (r_skb == NULL)
1213 return -ENOMEM;
1214
2fc5f83b
GS		 1215 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1216 BUG_ON(err < 0);
ecfd6b18 1217
15e47304 1218 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 1219}
1220
a1b831f2 1221static inline unsigned int xfrm_sadinfo_msgsize(void)
7deb2264
TG		 1222{
1223 return NLMSG_ALIGN(4)
1224 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1225 + nla_total_size(4); /* XFRMA_SAD_CNT */
1226}
1227
e071041b 1228static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1229 u32 portid, u32 seq, u32 flags)
28d8909b 1230{
af11e316
JHS		 1231 struct xfrmk_sadinfo si;
1232 struct xfrmu_sadhinfo sh;
28d8909b 1233 struct nlmsghdr *nlh;
1d1e34dd 1234 int err;
28d8909b
JHS		 1235 u32 *f;
1236
15e47304 1237 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1238 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1239 return -EMSGSIZE;
1240
1241 f = nlmsg_data(nlh);
1242 *f = flags;
e071041b 1243 xfrm_sad_getinfo(net, &si);
28d8909b 1244
af11e316
JHS		 1245 sh.sadhmcnt = si.sadhmcnt;
1246 sh.sadhcnt = si.sadhcnt;
1247
1d1e34dd
DM		 1248 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1249 if (!err)
1250 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1251 if (err) {
1252 nlmsg_cancel(skb, nlh);
1253 return err;
1254 }
28d8909b 1255
053c095a
JB		 1256 nlmsg_end(skb, nlh);
1257 return 0;
28d8909b
JHS		 1258}
1259
1260static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1261 struct nlattr **attrs)
28d8909b 1262{
a6483b79 1263 struct net *net = sock_net(skb->sk);
28d8909b 1264 struct sk_buff *r_skb;
7b67c857 1265 u32 *flags = nlmsg_data(nlh);
15e47304 1266 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1267 u32 seq = nlh->nlmsg_seq;
2fc5f83b 1268 int err;
28d8909b 1269
7deb2264 1270 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1271 if (r_skb == NULL)
1272 return -ENOMEM;
1273
2fc5f83b
GS		 1274 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1275 BUG_ON(err < 0);
28d8909b 1276
15e47304 1277 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1278}
1279
22e70050 1280static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1281 struct nlattr **attrs)
1da177e4 1282{
fc34acd3 1283 struct net *net = sock_net(skb->sk);
7b67c857 1284 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1285 struct xfrm_state *x;
1286 struct sk_buff *resp_skb;
eb2971b6 1287 int err = -ESRCH;
1da177e4 1288
fc34acd3 1289 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1290 if (x == NULL)
1291 goto out_noput;
1292
1293 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1294 if (IS_ERR(resp_skb)) {
1295 err = PTR_ERR(resp_skb);
1296 } else {
15e47304 1297 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1298 }
1299 xfrm_state_put(x);
1300out_noput:
1301 return err;
1302}
1303
22e70050 1304static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1305 struct nlattr **attrs)
1da177e4 1306{
fc34acd3 1307 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1308 struct xfrm_state *x;
1309 struct xfrm_userspi_info *p;
1310 struct sk_buff *resp_skb;
1311 xfrm_address_t *daddr;
1312 int family;
1313 int err;
6f26b61e
JHS		 1314 u32 mark;
1315 struct xfrm_mark m;
7e652640 1316 u32 if_id = 0;
1da177e4 1317
7b67c857 1318 p = nlmsg_data(nlh);
776e9dd9 1319 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1320 if (err)
1321 goto out_noput;
1322
1323 family = p->info.family;
1324 daddr = &p->info.id.daddr;
1325
1326 x = NULL;
6f26b61e
JHS		 1327
1328 mark = xfrm_mark_get(attrs, &m);
7e652640
SK		 1329
1330 if (attrs[XFRMA_IF_ID])
1331 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1332
1da177e4 1333 if (p->info.seq) {
6f26b61e 1334 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1335 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1336 xfrm_state_put(x);
1337 x = NULL;
1338 }
1339 }
1340
1341 if (!x)
6f26b61e 1342 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
7e652640 1343 if_id, p->info.id.proto, daddr,
1da177e4
LT		 1344 &p->info.saddr, 1,
1345 family);
1346 err = -ENOENT;
1347 if (x == NULL)
1348 goto out_noput;
1349
658b219e
HX		 1350 err = xfrm_alloc_spi(x, p->min, p->max);
1351 if (err)
1352 goto out;
1da177e4 1353
658b219e 1354 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1355 if (IS_ERR(resp_skb)) {
1356 err = PTR_ERR(resp_skb);
1357 goto out;
1358 }
1359
15e47304 1360 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1361
1362out:
1363 xfrm_state_put(x);
1364out_noput:
1365 return err;
1366}
1367
b798a9ed 1368static int verify_policy_dir(u8 dir)
1da177e4
LT		 1369{
1370 switch (dir) {
1371 case XFRM_POLICY_IN:
1372 case XFRM_POLICY_OUT:
1373 case XFRM_POLICY_FWD:
1374 break;
1375
1376 default:
1377 return -EINVAL;
3ff50b79 1378 }
1da177e4
LT		 1379
1380 return 0;
1381}
1382
b798a9ed 1383static int verify_policy_type(u8 type)
f7b6983f
MN		 1384{
1385 switch (type) {
1386 case XFRM_POLICY_TYPE_MAIN:
1387#ifdef CONFIG_XFRM_SUB_POLICY
1388 case XFRM_POLICY_TYPE_SUB:
1389#endif
1390 break;
1391
1392 default:
1393 return -EINVAL;
3ff50b79 1394 }
f7b6983f
MN		 1395
1396 return 0;
1397}
1398
1da177e4
LT		 1399static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1400{
e682adf0
FD		 1401 int ret;
1402
1da177e4
LT		 1403 switch (p->share) {
1404 case XFRM_SHARE_ANY:
1405 case XFRM_SHARE_SESSION:
1406 case XFRM_SHARE_USER:
1407 case XFRM_SHARE_UNIQUE:
1408 break;
1409
1410 default:
1411 return -EINVAL;
3ff50b79 1412 }
1da177e4
LT		 1413
1414 switch (p->action) {
1415 case XFRM_POLICY_ALLOW:
1416 case XFRM_POLICY_BLOCK:
1417 break;
1418
1419 default:
1420 return -EINVAL;
3ff50b79 1421 }
1da177e4
LT		 1422
1423 switch (p->sel.family) {
1424 case AF_INET:
07bf7908
SK		 1425 if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
1426 return -EINVAL;
1427
1da177e4
LT		 1428 break;
1429
1430 case AF_INET6:
dfd56b8b 1431#if IS_ENABLED(CONFIG_IPV6)
07bf7908
SK		 1432 if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
1433 return -EINVAL;
1434
1da177e4
LT		 1435 break;
1436#else
1437 return -EAFNOSUPPORT;
1438#endif
1439
1440 default:
1441 return -EINVAL;
3ff50b79 1442 }
1da177e4 1443
e682adf0
FD		 1444 ret = verify_policy_dir(p->dir);
1445 if (ret)
1446 return ret;
b805d78d 1447 if (p->index && (xfrm_policy_id2dir(p->index) != p->dir))
e682adf0
FD		 1448 return -EINVAL;
1449
1450 return 0;
1da177e4
LT		 1451}
1452
5424f32e 1453static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1454{
5424f32e 1455 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1456 struct xfrm_user_sec_ctx *uctx;
1457
1458 if (!rt)
1459 return 0;
1460
5424f32e 1461 uctx = nla_data(rt);
52a4c640 1462 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1463}
1464
1da177e4
LT		 1465static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1466 int nr)
1467{
1468 int i;
1469
1470 xp->xfrm_nr = nr;
1471 for (i = 0; i < nr; i++, ut++) {
1472 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1473
1474 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1475 memcpy(&t->saddr, &ut->saddr,
1476 sizeof(xfrm_address_t));
1477 t->reqid = ut->reqid;
1478 t->mode = ut->mode;
1479 t->share = ut->share;
1480 t->optional = ut->optional;
1481 t->aalgos = ut->aalgos;
1482 t->ealgos = ut->ealgos;
1483 t->calgos = ut->calgos;
c5d18e98
HX		 1484 /* If all masks are ~0, then we allow all algorithms. */
1485 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1486 t->encap_family = ut->family;
1da177e4
LT		 1487 }
1488}
1489
b4ad86bf
DM		 1490static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1491{
732706af 1492 u16 prev_family;
b4ad86bf
DM		 1493 int i;
1494
1495 if (nr > XFRM_MAX_DEPTH)
1496 return -EINVAL;
1497
732706af
SK		 1498 prev_family = family;
1499
b4ad86bf
DM		 1500 for (i = 0; i < nr; i++) {
1501 /* We never validated the ut->family value, so many
1502 * applications simply leave it at zero. The check was
1503 * never made and ut->family was ignored because all
1504 * templates could be assumed to have the same family as
1505 * the policy itself. Now that we will have ipv4-in-ipv6
1506 * and ipv6-in-ipv4 tunnels, this is no longer true.
1507 */
1508 if (!ut[i].family)
1509 ut[i].family = family;
1510
35e61038
FW		 1511 switch (ut[i].mode) {
1512 case XFRM_MODE_TUNNEL:
1513 case XFRM_MODE_BEET:
1514 break;
1515 default:
1516 if (ut[i].family != prev_family)
1517 return -EINVAL;
1518 break;
1519 }
32bf94fb
ST		 1520 if (ut[i].mode >= XFRM_MODE_MAX)
1521 return -EINVAL;
732706af
SK		 1522
1523 prev_family = ut[i].family;
1524
b4ad86bf
DM		 1525 switch (ut[i].family) {
1526 case AF_INET:
1527 break;
dfd56b8b 1528#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1529 case AF_INET6:
1530 break;
1531#endif
1532 default:
1533 return -EINVAL;
3ff50b79 1534 }
6a53b759 1535
dbb2483b 1536 if (!xfrm_id_proto_valid(ut[i].id.proto))
6a53b759 1537 return -EINVAL;
b4ad86bf
DM		 1538 }
1539
1540 return 0;
1541}
1542
5424f32e 1543static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1544{
5424f32e 1545 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1546
1547 if (!rt) {
1548 pol->xfrm_nr = 0;
1549 } else {
5424f32e
TG		 1550 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1551 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1552 int err;
1da177e4 1553
b4ad86bf
DM		 1554 err = validate_tmpl(nr, utmpl, pol->family);
1555 if (err)
1556 return err;
1da177e4 1557
5424f32e 1558 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1559 }
1560 return 0;
1561}
1562
5424f32e 1563static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1564{
5424f32e 1565 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1566 struct xfrm_userpolicy_type *upt;
b798a9ed 1567 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1568 int err;
1569
1570 if (rt) {
5424f32e 1571 upt = nla_data(rt);
f7b6983f
MN		 1572 type = upt->type;
1573 }
1574
1575 err = verify_policy_type(type);
1576 if (err)
1577 return err;
1578
1579 *tp = type;
1580 return 0;
1581}
1582
1da177e4
LT		 1583static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1584{
1585 xp->priority = p->priority;
1586 xp->index = p->index;
1587 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1588 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1589 xp->action = p->action;
1590 xp->flags = p->flags;
1591 xp->family = p->sel.family;
1592 /* XXX xp->share = p->share; */
1593}
1594
1595static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1596{
7b789836 1597 memset(p, 0, sizeof(*p));
1da177e4
LT		 1598 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1599 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1600 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1601 p->priority = xp->priority;
1602 p->index = xp->index;
1603 p->sel.family = xp->family;
1604 p->dir = dir;
1605 p->action = xp->action;
1606 p->flags = xp->flags;
1607 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1608}
1609
fc34acd3 1610static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1611{
fc34acd3 1612 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1613 int err;
1614
1615 if (!xp) {
1616 *errp = -ENOMEM;
1617 return NULL;
1618 }
1619
1620 copy_from_user_policy(xp, p);
df71837d 1621
35a7aa08 1622 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1623 if (err)
1624 goto error;
1625
35a7aa08
TG		 1626 if (!(err = copy_from_user_tmpl(xp, attrs)))
1627 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1628 if (err)
1629 goto error;
1da177e4 1630
295fae56
JHS		 1631 xfrm_mark_get(attrs, &xp->mark);
1632
7e652640
SK		 1633 if (attrs[XFRMA_IF_ID])
1634 xp->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1635
1da177e4 1636 return xp;
f7b6983f
MN		 1637 error:
1638 *errp = err;
12a169e7 1639 xp->walk.dead = 1;
64c31b3f 1640 xfrm_policy_destroy(xp);
f7b6983f 1641 return NULL;
1da177e4
LT		 1642}
1643
22e70050 1644static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1645 struct nlattr **attrs)
1da177e4 1646{
fc34acd3 1647 struct net *net = sock_net(skb->sk);
7b67c857 1648 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1649 struct xfrm_policy *xp;
26b15dad 1650 struct km_event c;
1da177e4
LT		 1651 int err;
1652 int excl;
1653
1654 err = verify_newpolicy_info(p);
df71837d
TJ		 1655 if (err)
1656 return err;
35a7aa08 1657 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1658 if (err)
1659 return err;
1660
fc34acd3 1661 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1662 if (!xp)
1663 return err;
1664
25985edc 1665 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1666 * Aha! this is anti-netlink really i.e more pfkey derived
1667 * in netlink excl is a flag and you wouldnt need
1668 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1669 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1670 err = xfrm_policy_insert(p->dir, xp, excl);
2e71029e 1671 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 1672
1da177e4 1673 if (err) {
03e1ad7b 1674 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1675 kfree(xp);
1676 return err;
1677 }
1678
f60f6b8f 1679 c.event = nlh->nlmsg_type;
26b15dad 1680 c.seq = nlh->nlmsg_seq;
15e47304 1681 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1682 km_policy_notify(xp, p->dir, &c);
1683
1da177e4
LT		 1684 xfrm_pol_put(xp);
1685
1686 return 0;
1687}
1688
1689static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1690{
1691 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1692 int i;
1693
1694 if (xp->xfrm_nr == 0)
1695 return 0;
1696
1697 for (i = 0; i < xp->xfrm_nr; i++) {
1698 struct xfrm_user_tmpl *up = &vec[i];
1699 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1700
1f86840f 1701 memset(up, 0, sizeof(*up));
1da177e4 1702 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1703 up->family = kp->encap_family;
1da177e4
LT		 1704 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1705 up->reqid = kp->reqid;
1706 up->mode = kp->mode;
1707 up->share = kp->share;
1708 up->optional = kp->optional;
1709 up->aalgos = kp->aalgos;
1710 up->ealgos = kp->ealgos;
1711 up->calgos = kp->calgos;
1712 }
df71837d 1713
c0144bea
TG		 1714 return nla_put(skb, XFRMA_TMPL,
1715 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1716}
1717
1718static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1719{
1720 if (x->security) {
1721 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1722 }
1723 return 0;
0d681623 1724}
df71837d 1725
0d681623
SH		 1726static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1727{
1d1e34dd 1728 if (xp->security)
0d681623 1729 return copy_sec_ctx(xp->security, skb);
0d681623 1730 return 0;
df71837d 1731}
a1b831f2 1732static inline unsigned int userpolicy_type_attrsize(void)
cfbfd45a
TG		 1733{
1734#ifdef CONFIG_XFRM_SUB_POLICY
1735 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1736#else
1737 return 0;
1738#endif
1739}
df71837d 1740
f7b6983f 1741#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1742static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1743{
45c180bc
ED		 1744 struct xfrm_userpolicy_type upt;
1745
1746 /* Sadly there are two holes in struct xfrm_userpolicy_type */
1747 memset(&upt, 0, sizeof(upt));
1748 upt.type = type;
f7b6983f 1749
c0144bea 1750 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1751}
1752
1753#else
b798a9ed 1754static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1755{
1756 return 0;
1757}
1758#endif
1759
1da177e4
LT		 1760static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1761{
1762 struct xfrm_dump_info *sp = ptr;
1763 struct xfrm_userpolicy_info *p;
1764 struct sk_buff *in_skb = sp->in_skb;
1765 struct sk_buff *skb = sp->out_skb;
1766 struct nlmsghdr *nlh;
1d1e34dd 1767 int err;
1da177e4 1768
15e47304 1769 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1770 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1771 if (nlh == NULL)
1772 return -EMSGSIZE;
1da177e4 1773
7b67c857 1774 p = nlmsg_data(nlh);
1da177e4 1775 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1776 err = copy_to_user_tmpl(xp, skb);
1777 if (!err)
1778 err = copy_to_user_sec_ctx(xp, skb);
1779 if (!err)
1780 err = copy_to_user_policy_type(xp->type, skb);
1781 if (!err)
1782 err = xfrm_mark_put(skb, &xp->mark);
7e652640
SK		 1783 if (!err)
1784 err = xfrm_if_id_put(skb, xp->if_id);
1d1e34dd
DM		 1785 if (err) {
1786 nlmsg_cancel(skb, nlh);
1787 return err;
1788 }
9825069d 1789 nlmsg_end(skb, nlh);
1da177e4 1790 return 0;
1da177e4
LT		 1791}
1792
4c563f76
TT		 1793static int xfrm_dump_policy_done(struct netlink_callback *cb)
1794{
1137b5e2 1795 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
283bc9f3 1796 struct net *net = sock_net(cb->skb->sk);
4c563f76 1797
283bc9f3 1798 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1799 return 0;
1800}
1801
1137b5e2
HX		 1802static int xfrm_dump_policy_start(struct netlink_callback *cb)
1803{
1804 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1805
1806 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1807
1808 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1809 return 0;
1810}
1811
1da177e4
LT		 1812static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1813{
fc34acd3 1814 struct net *net = sock_net(skb->sk);
1137b5e2 1815 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1da177e4
LT		 1816 struct xfrm_dump_info info;
1817
1818 info.in_skb = cb->skb;
1819 info.out_skb = skb;
1820 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1821 info.nlmsg_flags = NLM_F_MULTI;
4c563f76 1822
fc34acd3 1823 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1824
1825 return skb->len;
1826}
1827
1828static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1829 struct xfrm_policy *xp,
1830 int dir, u32 seq)
1831{
1832 struct xfrm_dump_info info;
1833 struct sk_buff *skb;
c2546372 1834 int err;
1da177e4 1835
7deb2264 1836 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1837 if (!skb)
1838 return ERR_PTR(-ENOMEM);
1839
1da177e4
LT		 1840 info.in_skb = in_skb;
1841 info.out_skb = skb;
1842 info.nlmsg_seq = seq;
1843 info.nlmsg_flags = 0;
1da177e4 1844
c2546372
MK		 1845 err = dump_one_policy(xp, dir, 0, &info);
1846 if (err) {
1da177e4 1847 kfree_skb(skb);
c2546372 1848 return ERR_PTR(err);
1da177e4
LT		 1849 }
1850
1851 return skb;
1852}
1853
22e70050 1854static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1855 struct nlattr **attrs)
1da177e4 1856{
fc34acd3 1857 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1858 struct xfrm_policy *xp;
1859 struct xfrm_userpolicy_id *p;
b798a9ed 1860 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1861 int err;
26b15dad 1862 struct km_event c;
1da177e4 1863 int delete;
295fae56
JHS		 1864 struct xfrm_mark m;
1865 u32 mark = xfrm_mark_get(attrs, &m);
7e652640 1866 u32 if_id = 0;
1da177e4 1867
7b67c857 1868 p = nlmsg_data(nlh);
1da177e4
LT		 1869 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1870
35a7aa08 1871 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1872 if (err)
1873 return err;
1874
1da177e4
LT		 1875 err = verify_policy_dir(p->dir);
1876 if (err)
1877 return err;
1878
7e652640
SK		 1879 if (attrs[XFRMA_IF_ID])
1880 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
1881
1da177e4 1882 if (p->index)
7e652640 1883 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, delete, &err);
df71837d 1884 else {
5424f32e 1885 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1886 struct xfrm_sec_ctx *ctx;
df71837d 1887
35a7aa08 1888 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1889 if (err)
1890 return err;
1891
2c8dd116 1892 ctx = NULL;
df71837d 1893 if (rt) {
5424f32e 1894 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1895
52a4c640 1896 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1897 if (err)
df71837d 1898 return err;
2c8dd116 1899 }
7e652640 1900 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir, &p->sel,
6f26b61e 1901 ctx, delete, &err);
03e1ad7b 1902 security_xfrm_policy_free(ctx);
df71837d 1903 }
1da177e4
LT		 1904 if (xp == NULL)
1905 return -ENOENT;
1906
1907 if (!delete) {
1908 struct sk_buff *resp_skb;
1909
1910 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1911 if (IS_ERR(resp_skb)) {
1912 err = PTR_ERR(resp_skb);
1913 } else {
a6483b79 1914 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1915 NETLINK_CB(skb).portid);
1da177e4 1916 }
26b15dad 1917 } else {
2e71029e 1918 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 1919
1920 if (err != 0)
c8c05a8e 1921 goto out;
13fcfbb0 1922
e7443892 1923 c.data.byid = p->index;
f60f6b8f 1924 c.event = nlh->nlmsg_type;
26b15dad 1925 c.seq = nlh->nlmsg_seq;
15e47304 1926 c.portid = nlh->nlmsg_pid;
26b15dad 1927 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1928 }
1929
c8c05a8e 1930out:
ef41aaa0 1931 xfrm_pol_put(xp);
1da177e4
LT		 1932 return err;
1933}
1934
22e70050 1935static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1936 struct nlattr **attrs)
1da177e4 1937{
fc34acd3 1938 struct net *net = sock_net(skb->sk);
26b15dad 1939 struct km_event c;
7b67c857 1940 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
4aa2e62c 1941 int err;
1da177e4 1942
f75a2804 1943 err = xfrm_state_flush(net, p->proto, true, false);
9e64cc95
JHS		 1944 if (err) {
1945 if (err == -ESRCH) /* empty table */
1946 return 0;
069c474e 1947 return err;
9e64cc95 1948 }
bf08867f 1949 c.data.proto = p->proto;
f60f6b8f 1950 c.event = nlh->nlmsg_type;
26b15dad 1951 c.seq = nlh->nlmsg_seq;
15e47304 1952 c.portid = nlh->nlmsg_pid;
7067802e 1953 c.net = net;
26b15dad
JHS		 1954 km_state_notify(NULL, &c);
1955
1da177e4
LT		 1956 return 0;
1957}
1958
a1b831f2 1959static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1960{
a1b831f2 1961 unsigned int replay_size = x->replay_esn ?
d8647b79
SK		 1962 xfrm_replay_state_esn_len(x->replay_esn) :
1963 sizeof(struct xfrm_replay_state);
1964
7deb2264 1965 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1966 + nla_total_size(replay_size)
de95c4a4 1967 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1968 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1969 + nla_total_size(4) /* XFRM_AE_RTHR */
1970 + nla_total_size(4); /* XFRM_AE_ETHR */
1971}
d51d081d 1972
214e005b 1973static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1974{
1975 struct xfrm_aevent_id *id;
1976 struct nlmsghdr *nlh;
1d1e34dd 1977 int err;
d51d081d 1978
15e47304 1979 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1980 if (nlh == NULL)
1981 return -EMSGSIZE;
d51d081d 1982
7b67c857 1983 id = nlmsg_data(nlh);
931e79d7 1984 memset(&id->sa_id, 0, sizeof(id->sa_id));
9b7a787d 1985 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1986 id->sa_id.spi = x->id.spi;
1987 id->sa_id.family = x->props.family;
1988 id->sa_id.proto = x->id.proto;
9b7a787d 1989 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1990 id->reqid = x->props.reqid;
d51d081d
JHS		 1991 id->flags = c->data.aevent;
1992
d0fde795 1993 if (x->replay_esn) {
1d1e34dd
DM		 1994 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1995 xfrm_replay_state_esn_len(x->replay_esn),
1996 x->replay_esn);
d0fde795 1997 } else {
1d1e34dd
DM		 1998 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1999 &x->replay);
d0fde795 2000 }
1d1e34dd
DM		 2001 if (err)
2002 goto out_cancel;
de95c4a4
ND		 2003 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
2004 XFRMA_PAD);
1d1e34dd
DM		 2005 if (err)
2006 goto out_cancel;
d51d081d 2007
1d1e34dd
DM		 2008 if (id->flags & XFRM_AE_RTHR) {
2009 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
2010 if (err)
2011 goto out_cancel;
2012 }
2013 if (id->flags & XFRM_AE_ETHR) {
2014 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
2015 x->replay_maxage * 10 / HZ);
2016 if (err)
2017 goto out_cancel;
2018 }
2019 err = xfrm_mark_put(skb, &x->mark);
2020 if (err)
2021 goto out_cancel;
6f26b61e 2022
7e652640
SK		 2023 err = xfrm_if_id_put(skb, x->if_id);
2024 if (err)
2025 goto out_cancel;
2026
053c095a
JB		 2027 nlmsg_end(skb, nlh);
2028 return 0;
d51d081d 2029
1d1e34dd 2030out_cancel:
9825069d 2031 nlmsg_cancel(skb, nlh);
1d1e34dd 2032 return err;
d51d081d
JHS		 2033}
2034
22e70050 2035static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2036 struct nlattr **attrs)
d51d081d 2037{
fc34acd3 2038 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 2039 struct xfrm_state *x;
2040 struct sk_buff *r_skb;
2041 int err;
2042 struct km_event c;
6f26b61e
JHS		 2043 u32 mark;
2044 struct xfrm_mark m;
7b67c857 2045 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 2046 struct xfrm_usersa_id *id = &p->sa_id;
2047
6f26b61e
JHS		 2048 mark = xfrm_mark_get(attrs, &m);
2049
2050 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 2051 if (x == NULL)
d51d081d 2052 return -ESRCH;
d8647b79
SK		 2053
2054 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
2055 if (r_skb == NULL) {
2056 xfrm_state_put(x);
2057 return -ENOMEM;
d51d081d
JHS		 2058 }
2059
2060 /*
2061 * XXX: is this lock really needed - none of the other
2062 * gets lock (the concern is things getting updated
2063 * while we are still reading) - jhs
2064 */
2065 spin_lock_bh(&x->lock);
2066 c.data.aevent = p->flags;
2067 c.seq = nlh->nlmsg_seq;
15e47304 2068 c.portid = nlh->nlmsg_pid;
d51d081d 2069
2fc5f83b
GS		 2070 err = build_aevent(r_skb, x, &c);
2071 BUG_ON(err < 0);
2072
15e47304 2073 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 2074 spin_unlock_bh(&x->lock);
2075 xfrm_state_put(x);
2076 return err;
2077}
2078
22e70050 2079static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2080 struct nlattr **attrs)
d51d081d 2081{
fc34acd3 2082 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 2083 struct xfrm_state *x;
2084 struct km_event c;
02d0892f 2085 int err = -EINVAL;
6f26b61e
JHS		 2086 u32 mark = 0;
2087 struct xfrm_mark m;
7b67c857 2088 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 2089 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 2090 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 2091 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
4e077237
MR		 2092 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2093 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 2094
4e077237 2095 if (!lt && !rp && !re && !et && !rt)
d51d081d
JHS		 2096 return err;
2097
2098 /* pedantic mode - thou shalt sayeth replaceth */
2099 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
2100 return err;
2101
6f26b61e
JHS		 2102 mark = xfrm_mark_get(attrs, &m);
2103
2104 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 2105 if (x == NULL)
2106 return -ESRCH;
2107
2108 if (x->km.state != XFRM_STATE_VALID)
2109 goto out;
2110
4479ff76 2111 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 2112 if (err)
2113 goto out;
2114
d51d081d 2115 spin_lock_bh(&x->lock);
e3ac104d 2116 xfrm_update_ae_params(x, attrs, 1);
d51d081d 2117 spin_unlock_bh(&x->lock);
d51d081d
JHS		 2118
2119 c.event = nlh->nlmsg_type;
2120 c.seq = nlh->nlmsg_seq;
15e47304 2121 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 2122 c.data.aevent = XFRM_AE_CU;
2123 km_state_notify(x, &c);
2124 err = 0;
2125out:
2126 xfrm_state_put(x);
2127 return err;
2128}
2129
22e70050 2130static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2131 struct nlattr **attrs)
1da177e4 2132{
fc34acd3 2133 struct net *net = sock_net(skb->sk);
f7b6983f 2134 struct km_event c;
b798a9ed 2135 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 2136 int err;
2137
35a7aa08 2138 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2139 if (err)
2140 return err;
26b15dad 2141
2e71029e 2142 err = xfrm_policy_flush(net, type, true);
2f1eb65f
JHS		 2143 if (err) {
2144 if (err == -ESRCH) /* empty table */
2145 return 0;
069c474e 2146 return err;
2f1eb65f
JHS		 2147 }
2148
f7b6983f 2149 c.data.type = type;
f60f6b8f 2150 c.event = nlh->nlmsg_type;
26b15dad 2151 c.seq = nlh->nlmsg_seq;
15e47304 2152 c.portid = nlh->nlmsg_pid;
7067802e 2153 c.net = net;
26b15dad 2154 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2155 return 0;
2156}
2157
22e70050 2158static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2159 struct nlattr **attrs)
6c5c8ca7 2160{
fc34acd3 2161 struct net *net = sock_net(skb->sk);
6c5c8ca7 2162 struct xfrm_policy *xp;
7b67c857 2163 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 2164 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 2165 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 2166 int err = -ENOENT;
295fae56
JHS		 2167 struct xfrm_mark m;
2168 u32 mark = xfrm_mark_get(attrs, &m);
7e652640 2169 u32 if_id = 0;
6c5c8ca7 2170
35a7aa08 2171 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2172 if (err)
2173 return err;
2174
c8bf4d04
TT		 2175 err = verify_policy_dir(p->dir);
2176 if (err)
2177 return err;
2178
7e652640
SK		 2179 if (attrs[XFRMA_IF_ID])
2180 if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
2181
6c5c8ca7 2182 if (p->index)
7e652640 2183 xp = xfrm_policy_byid(net, mark, if_id, type, p->dir, p->index, 0, &err);
6c5c8ca7 2184 else {
5424f32e 2185 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 2186 struct xfrm_sec_ctx *ctx;
6c5c8ca7 2187
35a7aa08 2188 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 2189 if (err)
2190 return err;
2191
2c8dd116 2192 ctx = NULL;
6c5c8ca7 2193 if (rt) {
5424f32e 2194 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 2195
52a4c640 2196 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 2197 if (err)
6c5c8ca7 2198 return err;
2c8dd116 2199 }
7e652640 2200 xp = xfrm_policy_bysel_ctx(net, mark, if_id, type, p->dir,
6f26b61e 2201 &p->sel, ctx, 0, &err);
03e1ad7b 2202 security_xfrm_policy_free(ctx);
6c5c8ca7 2203 }
6c5c8ca7 2204 if (xp == NULL)
ef41aaa0 2205 return -ENOENT;
03e1ad7b 2206
ea2dea9d 2207 if (unlikely(xp->walk.dead))
6c5c8ca7 2208 goto out;
6c5c8ca7 2209
6c5c8ca7
JHS		 2210 err = 0;
2211 if (up->hard) {
2212 xfrm_policy_delete(xp, p->dir);
2e71029e 2213 xfrm_audit_policy_delete(xp, 1, true);
6c5c8ca7 2214 }
c6bb8136 2215 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 2216
2217out:
2218 xfrm_pol_put(xp);
2219 return err;
2220}
2221
22e70050 2222static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2223 struct nlattr **attrs)
53bc6b4d 2224{
fc34acd3 2225 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 2226 struct xfrm_state *x;
2227 int err;
7b67c857 2228 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 2229 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 2230 struct xfrm_mark m;
928497f0 2231 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 2232
6f26b61e 2233 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 2234
3a765aa5 2235 err = -ENOENT;
53bc6b4d
JHS		 2236 if (x == NULL)
2237 return err;
2238
53bc6b4d 2239 spin_lock_bh(&x->lock);
3a765aa5 2240 err = -EINVAL;
53bc6b4d
JHS		 2241 if (x->km.state != XFRM_STATE_VALID)
2242 goto out;
c6bb8136 2243 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 2244
161a09e7 2245 if (ue->hard) {
53bc6b4d 2246 __xfrm_state_delete(x);
2e71029e 2247 xfrm_audit_state_delete(x, 1, true);
161a09e7 2248 }
3a765aa5 2249 err = 0;
53bc6b4d
JHS		 2250out:
2251 spin_unlock_bh(&x->lock);
2252 xfrm_state_put(x);
2253 return err;
2254}
2255
22e70050 2256static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2257 struct nlattr **attrs)
980ebd25 2258{
fc34acd3 2259 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2260 struct xfrm_policy *xp;
2261 struct xfrm_user_tmpl *ut;
2262 int i;
5424f32e 2263 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2264 struct xfrm_mark mark;
980ebd25 2265
7b67c857 2266 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2267 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2268 int err = -ENOMEM;
2269
2270 if (!x)
d8eb9307 2271 goto nomem;
980ebd25 2272
6f26b61e
JHS		 2273 xfrm_mark_get(attrs, &mark);
2274
980ebd25 2275 err = verify_newpolicy_info(&ua->policy);
d8eb9307 2276 if (err)
73efc324 2277 goto free_state;
980ebd25
JHS		 2278
2279 /* build an XP */
fc34acd3 2280 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2281 if (!xp)
2282 goto free_state;
980ebd25
JHS		 2283
2284 memcpy(&x->id, &ua->id, sizeof(ua->id));
2285 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2286 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2287 xp->mark.m = x->mark.m = mark.m;
2288 xp->mark.v = x->mark.v = mark.v;
5424f32e 2289 ut = nla_data(rt);
980ebd25
JHS		 2290 /* extract the templates and for each call km_key */
2291 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2292 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2293 memcpy(&x->id, &t->id, sizeof(x->id));
2294 x->props.mode = t->mode;
2295 x->props.reqid = t->reqid;
2296 x->props.family = ut->family;
2297 t->aalgos = ua->aalgos;
2298 t->ealgos = ua->ealgos;
2299 t->calgos = ua->calgos;
2300 err = km_query(x, t, xp);
2301
2302 }
2303
4a135e53 2304 xfrm_state_free(x);
980ebd25
JHS		 2305 kfree(xp);
2306
2307 return 0;
d8eb9307 2308
d8eb9307 2309free_state:
4a135e53 2310 xfrm_state_free(x);
d8eb9307
IJ		 2311nomem:
2312 return err;
980ebd25
JHS		 2313}
2314
5c79de6e 2315#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2316static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2317 struct xfrm_kmaddress *k,
5424f32e 2318 struct nlattr **attrs, int *num)
5c79de6e 2319{
5424f32e 2320 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2321 struct xfrm_user_migrate *um;
2322 int i, num_migrate;
2323
13c1d189
AE		 2324 if (k != NULL) {
2325 struct xfrm_user_kmaddress *uk;
2326
2327 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2328 memcpy(&k->local, &uk->local, sizeof(k->local));
2329 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2330 k->family = uk->family;
2331 k->reserved = uk->reserved;
2332 }
2333
5424f32e
TG		 2334 um = nla_data(rt);
2335 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2336
2337 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2338 return -EINVAL;
2339
2340 for (i = 0; i < num_migrate; i++, um++, ma++) {
2341 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2342 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2343 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2344 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2345
2346 ma->proto = um->proto;
2347 ma->mode = um->mode;
2348 ma->reqid = um->reqid;
2349
2350 ma->old_family = um->old_family;
2351 ma->new_family = um->new_family;
2352 }
2353
2354 *num = i;
2355 return 0;
2356}
2357
2358static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2359 struct nlattr **attrs)
5c79de6e 2360{
7b67c857 2361 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2362 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2363 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2364 u8 type;
2365 int err;
2366 int n = 0;
8d549c4f 2367 struct net *net = sock_net(skb->sk);
4ab47d47 2368 struct xfrm_encap_tmpl *encap = NULL;
5c79de6e 2369
35a7aa08 2370 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2371 return -EINVAL;
5c79de6e 2372
13c1d189
AE		 2373 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2374
5424f32e 2375 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2376 if (err)
2377 return err;
2378
13c1d189 2379 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2380 if (err)
2381 return err;
2382
2383 if (!n)
2384 return 0;
2385
4ab47d47
AA		 2386 if (attrs[XFRMA_ENCAP]) {
2387 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2388 sizeof(*encap), GFP_KERNEL);
2389 if (!encap)
2390 return 0;
2391 }
5c79de6e 2392
4ab47d47
AA		 2393 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2394
2395 kfree(encap);
2396
2397 return err;
5c79de6e
SS		 2398}
2399#else
2400static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2401 struct nlattr **attrs)
5c79de6e
SS		 2402{
2403 return -ENOPROTOOPT;
2404}
2405#endif
2406
2407#ifdef CONFIG_XFRM_MIGRATE
183cad12 2408static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2409{
2410 struct xfrm_user_migrate um;
2411
2412 memset(&um, 0, sizeof(um));
2413 um.proto = m->proto;
2414 um.mode = m->mode;
2415 um.reqid = m->reqid;
2416 um.old_family = m->old_family;
2417 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2418 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2419 um.new_family = m->new_family;
2420 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2421 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2422
c0144bea 2423 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2424}
2425
183cad12 2426static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2427{
2428 struct xfrm_user_kmaddress uk;
2429
2430 memset(&uk, 0, sizeof(uk));
2431 uk.family = k->family;
2432 uk.reserved = k->reserved;
2433 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2434 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2435
2436 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2437}
2438
a1b831f2
AD		 2439static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2440 int with_encp)
7deb2264
TG		 2441{
2442 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189 2443 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
8bafd730 2444 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
13c1d189
AE		 2445 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2446 + userpolicy_type_attrsize();
7deb2264
TG		 2447}
2448
183cad12
DM		 2449static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2450 int num_migrate, const struct xfrm_kmaddress *k,
8bafd730
AA		 2451 const struct xfrm_selector *sel,
2452 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
5c79de6e 2453{
183cad12 2454 const struct xfrm_migrate *mp;
5c79de6e
SS		 2455 struct xfrm_userpolicy_id *pol_id;
2456 struct nlmsghdr *nlh;
1d1e34dd 2457 int i, err;
5c79de6e 2458
79b8b7f4
TG		 2459 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2460 if (nlh == NULL)
2461 return -EMSGSIZE;
5c79de6e 2462
7b67c857 2463 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2464 /* copy data from selector, dir, and type to the pol_id */
2465 memset(pol_id, 0, sizeof(*pol_id));
2466 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2467 pol_id->dir = dir;
2468
1d1e34dd
DM		 2469 if (k != NULL) {
2470 err = copy_to_user_kmaddress(k, skb);
2471 if (err)
2472 goto out_cancel;
2473 }
8bafd730
AA		 2474 if (encap) {
2475 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2476 if (err)
2477 goto out_cancel;
2478 }
1d1e34dd
DM		 2479 err = copy_to_user_policy_type(type, skb);
2480 if (err)
2481 goto out_cancel;
5c79de6e 2482 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2483 err = copy_to_user_migrate(mp, skb);
2484 if (err)
2485 goto out_cancel;
5c79de6e
SS		 2486 }
2487
053c095a
JB		 2488 nlmsg_end(skb, nlh);
2489 return 0;
1d1e34dd
DM		 2490
2491out_cancel:
9825069d 2492 nlmsg_cancel(skb, nlh);
1d1e34dd 2493 return err;
5c79de6e
SS		 2494}
2495
183cad12
DM		 2496static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2497 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2498 const struct xfrm_kmaddress *k,
2499 const struct xfrm_encap_tmpl *encap)
5c79de6e 2500{
a6483b79 2501 struct net *net = &init_net;
5c79de6e 2502 struct sk_buff *skb;
2fc5f83b 2503 int err;
5c79de6e 2504
8bafd730
AA		 2505 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2506 GFP_ATOMIC);
5c79de6e
SS		 2507 if (skb == NULL)
2508 return -ENOMEM;
2509
2510 /* build migrate */
2fc5f83b
GS		 2511 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2512 BUG_ON(err < 0);
5c79de6e 2513
21ee543e 2514 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
5c79de6e
SS		 2515}
2516#else
183cad12
DM		 2517static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2518 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2519 const struct xfrm_kmaddress *k,
2520 const struct xfrm_encap_tmpl *encap)
5c79de6e
SS		 2521{
2522 return -ENOPROTOOPT;
2523}
2524#endif
d51d081d 2525
a7bd9a45 2526#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2527
2528static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2529 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2530 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2531 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2532 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2533 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2534 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2535 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2536 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2537 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2538 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2539 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2540 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2541 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2542 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2543 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2544 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2545 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2546 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45 2547 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
880a6fab 2548 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
a7bd9a45 2549 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2550};
2551
492b558b
TG		 2552#undef XMSGSIZE
2553
cf5cb79f 2554static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2555 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2556 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2557 [XFRMA_LASTUSED] = { .type = NLA_U64},
2558 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2559 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2560 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2561 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2562 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2563 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2564 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2565 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2566 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2567 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2568 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2569 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2570 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2571 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2572 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2573 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2574 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2575 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2576 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2577 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2578 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
d3623099 2579 [XFRMA_PROTO] = { .type = NLA_U8 },
870a2df4 2580 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
d77e38e6 2581 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
9b42c1f1
SK		 2582 [XFRMA_SET_MARK] = { .type = NLA_U32 },
2583 [XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
7e652640 2584 [XFRMA_IF_ID] = { .type = NLA_U32 },
cf5cb79f
TG		 2585};
2586
880a6fab
CG		 2587static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2588 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2589 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2590};
2591
05600a79 2592static const struct xfrm_link {
5424f32e 2593 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1137b5e2 2594 int (*start)(struct netlink_callback *);
1da177e4 2595 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2596 int (*done)(struct netlink_callback *);
880a6fab
CG		 2597 const struct nla_policy *nla_pol;
2598 int nla_max;
492b558b
TG		 2599} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2600 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2601 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2602 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2603 .dump = xfrm_dump_sa,
2604 .done = xfrm_dump_sa_done },
492b558b
TG		 2605 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2606 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2607 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1137b5e2 2608 .start = xfrm_dump_policy_start,
4c563f76
TT		 2609 .dump = xfrm_dump_policy,
2610 .done = xfrm_dump_policy_done },
492b558b 2611 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2612 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2613 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2614 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2615 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2616 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2617 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2618 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2619 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2620 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2621 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2622 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
880a6fab
CG		 2623 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2624 .nla_pol = xfrma_spd_policy,
2625 .nla_max = XFRMA_SPD_MAX },
ecfd6b18 2626 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2627};
2628
2d4bc933
JB		 2629static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2630 struct netlink_ext_ack *extack)
1da177e4 2631{
a6483b79 2632 struct net *net = sock_net(skb->sk);
35a7aa08 2633 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2634 const struct xfrm_link *link;
a7bd9a45 2635 int type, err;
1da177e4 2636
2bf8c476 2637 if (in_compat_syscall())
83e2d058 2638 return -EOPNOTSUPP;
74005991 2639
1da177e4 2640 type = nlh->nlmsg_type;
1da177e4 2641 if (type > XFRM_MSG_MAX)
1d00a4eb 2642 return -EINVAL;
1da177e4
LT		 2643
2644 type -= XFRM_MSG_BASE;
2645 link = &xfrm_dispatch[type];
2646
2647 /* All operations require privileges, even GET */
90f62cf3 2648 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 2649 return -EPERM;
1da177e4 2650
492b558b
TG		 2651 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2652 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2653 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2654 if (link->dump == NULL)
1d00a4eb 2655 return -EINVAL;
88fc2c84 2656
80d326fa
PNA		 2657 {
2658 struct netlink_dump_control c = {
1137b5e2 2659 .start = link->start,
80d326fa
PNA		 2660 .dump = link->dump,
2661 .done = link->done,
2662 };
2663 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2664 }
1da177e4
LT		 2665 }
2666
8cb08174
JB		 2667 err = nlmsg_parse_deprecated(nlh, xfrm_msg_min[type], attrs,
2668 link->nla_max ? : XFRMA_MAX,
2669 link->nla_pol ? : xfrma_policy, extack);
a7bd9a45
TG		 2670 if (err < 0)
2671 return err;
1da177e4
LT		 2672
2673 if (link->doit == NULL)
1d00a4eb 2674 return -EINVAL;
1da177e4 2675
5424f32e 2676 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2677}
2678
cd40b7d3 2679static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2680{
283bc9f3
FD		 2681 struct net *net = sock_net(skb->sk);
2682
2683 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2684 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2685 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2686}
2687
a1b831f2 2688static inline unsigned int xfrm_expire_msgsize(void)
7deb2264 2689{
6f26b61e
JHS		 2690 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2691 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2692}
2693
214e005b 2694static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2695{
2696 struct xfrm_user_expire *ue;
2697 struct nlmsghdr *nlh;
1d1e34dd 2698 int err;
1da177e4 2699
15e47304 2700 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2701 if (nlh == NULL)
2702 return -EMSGSIZE;
1da177e4 2703
7b67c857 2704 ue = nlmsg_data(nlh);
1da177e4 2705 copy_to_user_state(x, &ue->state);
d51d081d 2706 ue->hard = (c->data.hard != 0) ? 1 : 0;
e3e5fc16
MK		 2707 /* clear the padding bytes */
2708 memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));
1da177e4 2709
1d1e34dd
DM		 2710 err = xfrm_mark_put(skb, &x->mark);
2711 if (err)
2712 return err;
6f26b61e 2713
7e652640
SK		 2714 err = xfrm_if_id_put(skb, x->if_id);
2715 if (err)
2716 return err;
2717
053c095a
JB		 2718 nlmsg_end(skb, nlh);
2719 return 0;
1da177e4
LT		 2720}
2721
214e005b 2722static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2723{
fc34acd3 2724 struct net *net = xs_net(x);
1da177e4
LT		 2725 struct sk_buff *skb;
2726
7deb2264 2727 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2728 if (skb == NULL)
2729 return -ENOMEM;
2730
6f26b61e
JHS		 2731 if (build_expire(skb, x, c) < 0) {
2732 kfree_skb(skb);
2733 return -EMSGSIZE;
2734 }
1da177e4 2735
21ee543e 2736 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2737}
2738
214e005b 2739static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2740{
fc34acd3 2741 struct net *net = xs_net(x);
d51d081d 2742 struct sk_buff *skb;
2fc5f83b 2743 int err;
d51d081d 2744
d8647b79 2745 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2746 if (skb == NULL)
2747 return -ENOMEM;
2748
2fc5f83b
GS		 2749 err = build_aevent(skb, x, c);
2750 BUG_ON(err < 0);
d51d081d 2751
21ee543e 2752 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
d51d081d
JHS		 2753}
2754
214e005b 2755static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2756{
7067802e 2757 struct net *net = c->net;
26b15dad
JHS		 2758 struct xfrm_usersa_flush *p;
2759 struct nlmsghdr *nlh;
2760 struct sk_buff *skb;
7deb2264 2761 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2762
7deb2264 2763 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2764 if (skb == NULL)
2765 return -ENOMEM;
26b15dad 2766
15e47304 2767 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2768 if (nlh == NULL) {
2769 kfree_skb(skb);
2770 return -EMSGSIZE;
2771 }
26b15dad 2772
7b67c857 2773 p = nlmsg_data(nlh);
bf08867f 2774 p->proto = c->data.proto;
26b15dad 2775
9825069d 2776 nlmsg_end(skb, nlh);
26b15dad 2777
21ee543e 2778 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad
JHS		 2779}
2780
a1b831f2 2781static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
26b15dad 2782{
a1b831f2 2783 unsigned int l = 0;
1a6509d9
HX		 2784 if (x->aead)
2785 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2786 if (x->aalg) {
2787 l += nla_total_size(sizeof(struct xfrm_algo) +
2788 (x->aalg->alg_key_len + 7) / 8);
2789 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2790 }
26b15dad 2791 if (x->ealg)
0f99be0d 2792 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2793 if (x->calg)
7deb2264 2794 l += nla_total_size(sizeof(*x->calg));
26b15dad 2795 if (x->encap)
7deb2264 2796 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2797 if (x->tfcpad)
2798 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2799 if (x->replay_esn)
2800 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
f293a5e3 2801 else
2802 l += nla_total_size(sizeof(struct xfrm_replay_state));
68325d3b
HX		 2803 if (x->security)
2804 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2805 x->security->ctx_len);
2806 if (x->coaddr)
2807 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2808 if (x->props.extra_flags)
2809 l += nla_total_size(sizeof(x->props.extra_flags));
d77e38e6
SK		 2810 if (x->xso.dev)
2811 l += nla_total_size(sizeof(x->xso));
9b42c1f1
SK		 2812 if (x->props.smark.v | x->props.smark.m) {
2813 l += nla_total_size(sizeof(x->props.smark.v));
2814 l += nla_total_size(sizeof(x->props.smark.m));
2815 }
7e652640
SK		 2816 if (x->if_id)
2817 l += nla_total_size(sizeof(x->if_id));
68325d3b 2818
d26f3984 2819 /* Must count x->lastused as it may become non-zero behind our back. */
de95c4a4 2820 l += nla_total_size_64bit(sizeof(u64));
26b15dad
JHS		 2821
2822 return l;
2823}
2824
214e005b 2825static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2826{
fc34acd3 2827 struct net *net = xs_net(x);
26b15dad 2828 struct xfrm_usersa_info *p;
0603eac0 2829 struct xfrm_usersa_id *id;
26b15dad
JHS		 2830 struct nlmsghdr *nlh;
2831 struct sk_buff *skb;
a1b831f2
AD		 2832 unsigned int len = xfrm_sa_len(x);
2833 unsigned int headlen;
2834 int err;
0603eac0
HX		 2835
2836 headlen = sizeof(*p);
2837 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2838 len += nla_total_size(headlen);
0603eac0 2839 headlen = sizeof(*id);
6f26b61e 2840 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2841 }
7deb2264 2842 len += NLMSG_ALIGN(headlen);
26b15dad 2843
7deb2264 2844 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2845 if (skb == NULL)
2846 return -ENOMEM;
26b15dad 2847
15e47304 2848 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2849 err = -EMSGSIZE;
79b8b7f4 2850 if (nlh == NULL)
1d1e34dd 2851 goto out_free_skb;
26b15dad 2852
7b67c857 2853 p = nlmsg_data(nlh);
0603eac0 2854 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2855 struct nlattr *attr;
2856
7b67c857 2857 id = nlmsg_data(nlh);
50329c8a 2858 memset(id, 0, sizeof(*id));
0603eac0
HX		 2859 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2860 id->spi = x->id.spi;
2861 id->family = x->props.family;
2862 id->proto = x->id.proto;
2863
c0144bea 2864 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2865 err = -EMSGSIZE;
c0144bea 2866 if (attr == NULL)
1d1e34dd 2867 goto out_free_skb;
c0144bea
TG		 2868
2869 p = nla_data(attr);
0603eac0 2870 }
1d1e34dd
DM		 2871 err = copy_to_user_state_extra(x, p, skb);
2872 if (err)
2873 goto out_free_skb;
26b15dad 2874
9825069d 2875 nlmsg_end(skb, nlh);
26b15dad 2876
21ee543e 2877 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad 2878
1d1e34dd 2879out_free_skb:
26b15dad 2880 kfree_skb(skb);
1d1e34dd 2881 return err;
26b15dad
JHS		 2882}
2883
214e005b 2884static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2885{
2886
2887 switch (c->event) {
f60f6b8f 2888 case XFRM_MSG_EXPIRE:
26b15dad 2889 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2890 case XFRM_MSG_NEWAE:
2891 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2892 case XFRM_MSG_DELSA:
2893 case XFRM_MSG_UPDSA:
2894 case XFRM_MSG_NEWSA:
26b15dad 2895 return xfrm_notify_sa(x, c);
f60f6b8f 2896 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2897 return xfrm_notify_sa_flush(c);
2898 default:
62db5cfd 2899 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2900 c->event);
2901 break;
26b15dad
JHS		 2902 }
2903
2904 return 0;
2905
2906}
2907
a1b831f2
AD		 2908static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
2909 struct xfrm_policy *xp)
7deb2264
TG		 2910{
2911 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2912 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2913 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2914 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2915 + userpolicy_type_attrsize();
2916}
2917
1da177e4 2918static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2919 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2920{
1d1e34dd 2921 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2922 struct xfrm_user_acquire *ua;
2923 struct nlmsghdr *nlh;
1d1e34dd 2924 int err;
1da177e4 2925
79b8b7f4
TG		 2926 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2927 if (nlh == NULL)
2928 return -EMSGSIZE;
1da177e4 2929
7b67c857 2930 ua = nlmsg_data(nlh);
1da177e4
LT		 2931 memcpy(&ua->id, &x->id, sizeof(ua->id));
2932 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2933 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2934 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2935 ua->aalgos = xt->aalgos;
2936 ua->ealgos = xt->ealgos;
2937 ua->calgos = xt->calgos;
2938 ua->seq = x->km.seq = seq;
2939
1d1e34dd
DM		 2940 err = copy_to_user_tmpl(xp, skb);
2941 if (!err)
2942 err = copy_to_user_state_sec_ctx(x, skb);
2943 if (!err)
2944 err = copy_to_user_policy_type(xp->type, skb);
2945 if (!err)
2946 err = xfrm_mark_put(skb, &xp->mark);
7e652640
SK		 2947 if (!err)
2948 err = xfrm_if_id_put(skb, xp->if_id);
1d1e34dd
DM		 2949 if (err) {
2950 nlmsg_cancel(skb, nlh);
2951 return err;
2952 }
1da177e4 2953
053c095a
JB		 2954 nlmsg_end(skb, nlh);
2955 return 0;
1da177e4
LT		 2956}
2957
2958static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2959 struct xfrm_policy *xp)
1da177e4 2960{
a6483b79 2961 struct net *net = xs_net(x);
1da177e4 2962 struct sk_buff *skb;
2fc5f83b 2963 int err;
1da177e4 2964
7deb2264 2965 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2966 if (skb == NULL)
2967 return -ENOMEM;
2968
2fc5f83b
GS		 2969 err = build_acquire(skb, x, xt, xp);
2970 BUG_ON(err < 0);
1da177e4 2971
21ee543e 2972 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
1da177e4
LT		 2973}
2974
2975/* User gives us xfrm_user_policy_info followed by an array of 0
2976 * or more templates.
2977 */
cb969f07 2978static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2979 u8 *data, int len, int *dir)
2980{
fc34acd3 2981 struct net *net = sock_net(sk);
1da177e4
LT		 2982 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2983 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2984 struct xfrm_policy *xp;
2985 int nr;
2986
cb969f07 2987 switch (sk->sk_family) {
1da177e4
LT		 2988 case AF_INET:
2989 if (opt != IP_XFRM_POLICY) {
2990 *dir = -EOPNOTSUPP;
2991 return NULL;
2992 }
2993 break;
dfd56b8b 2994#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2995 case AF_INET6:
2996 if (opt != IPV6_XFRM_POLICY) {
2997 *dir = -EOPNOTSUPP;
2998 return NULL;
2999 }
3000 break;
3001#endif
3002 default:
3003 *dir = -EINVAL;
3004 return NULL;
3005 }
3006
3007 *dir = -EINVAL;
3008
3009 if (len < sizeof(*p) ||
3010 verify_newpolicy_info(p))
3011 return NULL;
3012
3013 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 3014 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 3015 return NULL;
3016
a4f1bac6
HX		 3017 if (p->dir > XFRM_POLICY_OUT)
3018 return NULL;
3019
2f09a4d5 3020 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 3021 if (xp == NULL) {
3022 *dir = -ENOBUFS;
3023 return NULL;
3024 }
3025
3026 copy_from_user_policy(xp, p);
f7b6983f 3027 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 3028 copy_templates(xp, ut, nr);
3029
3030 *dir = p->dir;
3031
3032 return xp;
3033}
3034
a1b831f2 3035static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
7deb2264
TG		 3036{
3037 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
3038 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
3039 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 3040 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 3041 + userpolicy_type_attrsize();
3042}
3043
1da177e4 3044static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 3045 int dir, const struct km_event *c)
1da177e4
LT		 3046{
3047 struct xfrm_user_polexpire *upe;
d51d081d 3048 int hard = c->data.hard;
1d1e34dd
DM		 3049 struct nlmsghdr *nlh;
3050 int err;
1da177e4 3051
15e47304 3052 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 3053 if (nlh == NULL)
3054 return -EMSGSIZE;
1da177e4 3055
7b67c857 3056 upe = nlmsg_data(nlh);
1da177e4 3057 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 3058 err = copy_to_user_tmpl(xp, skb);
3059 if (!err)
3060 err = copy_to_user_sec_ctx(xp, skb);
3061 if (!err)
3062 err = copy_to_user_policy_type(xp->type, skb);
3063 if (!err)
3064 err = xfrm_mark_put(skb, &xp->mark);
7e652640
SK		 3065 if (!err)
3066 err = xfrm_if_id_put(skb, xp->if_id);
1d1e34dd
DM		 3067 if (err) {
3068 nlmsg_cancel(skb, nlh);
3069 return err;
3070 }
1da177e4
LT		 3071 upe->hard = !!hard;
3072
053c095a
JB		 3073 nlmsg_end(skb, nlh);
3074 return 0;
1da177e4
LT		 3075}
3076
214e005b 3077static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 3078{
fc34acd3 3079 struct net *net = xp_net(xp);
1da177e4 3080 struct sk_buff *skb;
2fc5f83b 3081 int err;
1da177e4 3082
7deb2264 3083 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 3084 if (skb == NULL)
3085 return -ENOMEM;
3086
2fc5f83b
GS		 3087 err = build_polexpire(skb, xp, dir, c);
3088 BUG_ON(err < 0);
1da177e4 3089
21ee543e 3090 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 3091}
3092
214e005b 3093static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 3094{
a1b831f2 3095 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 3096 struct net *net = xp_net(xp);
26b15dad 3097 struct xfrm_userpolicy_info *p;
0603eac0 3098 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 3099 struct nlmsghdr *nlh;
3100 struct sk_buff *skb;
a1b831f2
AD		 3101 unsigned int headlen;
3102 int err;
0603eac0
HX		 3103
3104 headlen = sizeof(*p);
3105 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 3106 len += nla_total_size(headlen);
0603eac0
HX		 3107 headlen = sizeof(*id);
3108 }
cfbfd45a 3109 len += userpolicy_type_attrsize();
295fae56 3110 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 3111 len += NLMSG_ALIGN(headlen);
26b15dad 3112
7deb2264 3113 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 3114 if (skb == NULL)
3115 return -ENOMEM;
26b15dad 3116
15e47304 3117 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 3118 err = -EMSGSIZE;
79b8b7f4 3119 if (nlh == NULL)
1d1e34dd 3120 goto out_free_skb;
26b15dad 3121
7b67c857 3122 p = nlmsg_data(nlh);
0603eac0 3123 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 3124 struct nlattr *attr;
3125
7b67c857 3126 id = nlmsg_data(nlh);
0603eac0
HX		 3127 memset(id, 0, sizeof(*id));
3128 id->dir = dir;
3129 if (c->data.byid)
3130 id->index = xp->index;
3131 else
3132 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3133
c0144bea 3134 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 3135 err = -EMSGSIZE;
c0144bea 3136 if (attr == NULL)
1d1e34dd 3137 goto out_free_skb;
c0144bea
TG		 3138
3139 p = nla_data(attr);
0603eac0 3140 }
26b15dad 3141
26b15dad 3142 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 3143 err = copy_to_user_tmpl(xp, skb);
3144 if (!err)
3145 err = copy_to_user_policy_type(xp->type, skb);
3146 if (!err)
3147 err = xfrm_mark_put(skb, &xp->mark);
7e652640
SK		 3148 if (!err)
3149 err = xfrm_if_id_put(skb, xp->if_id);
1d1e34dd
DM		 3150 if (err)
3151 goto out_free_skb;
295fae56 3152
9825069d 3153 nlmsg_end(skb, nlh);
26b15dad 3154
21ee543e 3155 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3156
1d1e34dd 3157out_free_skb:
26b15dad 3158 kfree_skb(skb);
1d1e34dd 3159 return err;
26b15dad
JHS		 3160}
3161
214e005b 3162static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 3163{
7067802e 3164 struct net *net = c->net;
26b15dad
JHS		 3165 struct nlmsghdr *nlh;
3166 struct sk_buff *skb;
1d1e34dd 3167 int err;
26b15dad 3168
7deb2264 3169 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 3170 if (skb == NULL)
3171 return -ENOMEM;
26b15dad 3172
15e47304 3173 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 3174 err = -EMSGSIZE;
79b8b7f4 3175 if (nlh == NULL)
1d1e34dd
DM		 3176 goto out_free_skb;
3177 err = copy_to_user_policy_type(c->data.type, skb);
3178 if (err)
3179 goto out_free_skb;
26b15dad 3180
9825069d 3181 nlmsg_end(skb, nlh);
26b15dad 3182
21ee543e 3183 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3184
1d1e34dd 3185out_free_skb:
26b15dad 3186 kfree_skb(skb);
1d1e34dd 3187 return err;
26b15dad
JHS		 3188}
3189
214e005b 3190static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 3191{
3192
3193 switch (c->event) {
f60f6b8f
HX		 3194 case XFRM_MSG_NEWPOLICY:
3195 case XFRM_MSG_UPDPOLICY:
3196 case XFRM_MSG_DELPOLICY:
26b15dad 3197 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 3198 case XFRM_MSG_FLUSHPOLICY:
26b15dad 3199 return xfrm_notify_policy_flush(c);
f60f6b8f 3200 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 3201 return xfrm_exp_policy_notify(xp, dir, c);
3202 default:
62db5cfd 3203 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3204 c->event);
26b15dad
JHS		 3205 }
3206
3207 return 0;
3208
3209}
3210
a1b831f2 3211static inline unsigned int xfrm_report_msgsize(void)
7deb2264
TG		 3212{
3213 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3214}
3215
97a64b45
MN		 3216static int build_report(struct sk_buff *skb, u8 proto,
3217 struct xfrm_selector *sel, xfrm_address_t *addr)
3218{
3219 struct xfrm_user_report *ur;
3220 struct nlmsghdr *nlh;
97a64b45 3221
79b8b7f4
TG		 3222 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3223 if (nlh == NULL)
3224 return -EMSGSIZE;
97a64b45 3225
7b67c857 3226 ur = nlmsg_data(nlh);
97a64b45
MN		 3227 ur->proto = proto;
3228 memcpy(&ur->sel, sel, sizeof(ur->sel));
3229
1d1e34dd
DM		 3230 if (addr) {
3231 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3232 if (err) {
3233 nlmsg_cancel(skb, nlh);
3234 return err;
3235 }
3236 }
053c095a
JB		 3237 nlmsg_end(skb, nlh);
3238 return 0;
97a64b45
MN		 3239}
3240
db983c11
AD		 3241static int xfrm_send_report(struct net *net, u8 proto,
3242 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 3243{
3244 struct sk_buff *skb;
2fc5f83b 3245 int err;
97a64b45 3246
7deb2264 3247 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 3248 if (skb == NULL)
3249 return -ENOMEM;
3250
2fc5f83b
GS		 3251 err = build_report(skb, proto, sel, addr);
3252 BUG_ON(err < 0);
97a64b45 3253
21ee543e 3254 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
97a64b45
MN		 3255}
3256
a1b831f2 3257static inline unsigned int xfrm_mapping_msgsize(void)
3a2dfbe8
MW		 3258{
3259 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3260}
3261
3262static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3263 xfrm_address_t *new_saddr, __be16 new_sport)
3264{
3265 struct xfrm_user_mapping *um;
3266 struct nlmsghdr *nlh;
3267
3268 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3269 if (nlh == NULL)
3270 return -EMSGSIZE;
3271
3272 um = nlmsg_data(nlh);
3273
3274 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3275 um->id.spi = x->id.spi;
3276 um->id.family = x->props.family;
3277 um->id.proto = x->id.proto;
3278 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3279 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3280 um->new_sport = new_sport;
3281 um->old_sport = x->encap->encap_sport;
3282 um->reqid = x->props.reqid;
3283
053c095a
JB		 3284 nlmsg_end(skb, nlh);
3285 return 0;
3a2dfbe8
MW		 3286}
3287
3288static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3289 __be16 sport)
3290{
a6483b79 3291 struct net *net = xs_net(x);
3a2dfbe8 3292 struct sk_buff *skb;
2fc5f83b 3293 int err;
3a2dfbe8
MW		 3294
3295 if (x->id.proto != IPPROTO_ESP)
3296 return -EINVAL;
3297
3298 if (!x->encap)
3299 return -EINVAL;
3300
3301 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3302 if (skb == NULL)
3303 return -ENOMEM;
3304
2fc5f83b
GS		 3305 err = build_mapping(skb, x, ipaddr, sport);
3306 BUG_ON(err < 0);
3a2dfbe8 3307
21ee543e 3308 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3a2dfbe8
MW		 3309}
3310
0f24558e
HG		 3311static bool xfrm_is_alive(const struct km_event *c)
3312{
3313 return (bool)xfrm_acquire_is_on(c->net);
3314}
3315
1da177e4 3316static struct xfrm_mgr netlink_mgr = {
1da177e4
LT		 3317 .notify = xfrm_send_state_notify,
3318 .acquire = xfrm_send_acquire,
3319 .compile_policy = xfrm_compile_policy,
3320 .notify_policy = xfrm_send_policy_notify,
97a64b45 3321 .report = xfrm_send_report,
5c79de6e 3322 .migrate = xfrm_send_migrate,
3a2dfbe8 3323 .new_mapping = xfrm_send_mapping,
0f24558e 3324 .is_alive = xfrm_is_alive,
1da177e4
LT		 3325};
3326
a6483b79 3327static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 3328{
be33690d 3329 struct sock *nlsk;
a31f2d17
PNA		 3330 struct netlink_kernel_cfg cfg = {
3331 .groups = XFRMNLGRP_MAX,
3332 .input = xfrm_netlink_rcv,
3333 };
be33690d 3334
9f00d977 3335 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3336 if (nlsk == NULL)
1da177e4 3337 return -ENOMEM;
d79d792e 3338 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3339 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3340 return 0;
3341}
3342
d79d792e 3343static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3344{
d79d792e
EB		 3345 struct net *net;
3346 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3347 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3348 synchronize_net();
3349 list_for_each_entry(net, net_exit_list, exit_list)
3350 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3351}
3352
a6483b79 3353static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3354 .init = xfrm_user_net_init,
3355 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3356};
3357
3358static int __init xfrm_user_init(void)
3359{
3360 int rv;
3361
3362 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3363
3364 rv = register_pernet_subsys(&xfrm_user_net_ops);
3365 if (rv < 0)
3366 return rv;
3367 rv = xfrm_register_km(&netlink_mgr);
3368 if (rv < 0)
3369 unregister_pernet_subsys(&xfrm_user_net_ops);
3370 return rv;
3371}
3372
3373static void __exit xfrm_user_exit(void)
3374{
3375 xfrm_unregister_km(&netlink_mgr);
3376 unregister_pernet_subsys(&xfrm_user_net_ops);
3377}
3378
1da177e4
LT		 3379module_init(xfrm_user_init);
3380module_exit(xfrm_user_exit);
3381MODULE_LICENSE("GPL");
4fdb3bb7 3382MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
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