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xfrm_user: prevent leaking 2 bytes of kernel memory
[mirror_ubuntu-bionic-kernel.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
fa6dd8a2 29#include <net/ah.h>
7c0f6ba6 30#include <linux/uaccess.h>
dfd56b8b 31#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 32#include <linux/in6.h>
33#endif
e33d4f13 34#include <asm/unaligned.h>
1da177e4 35
5424f32e 36static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 37{
5424f32e 38 struct nlattr *rt = attrs[type];
1da177e4
LT		 39 struct xfrm_algo *algp;
40
41 if (!rt)
42 return 0;
43
5424f32e 44 algp = nla_data(rt);
06cd22f8 45 if (nla_len(rt) < (int)xfrm_alg_len(algp))
31c26852
HX		 46 return -EINVAL;
47
1da177e4
LT		 48 switch (type) {
49 case XFRMA_ALG_AUTH:
1da177e4 50 case XFRMA_ALG_CRYPT:
1da177e4 51 case XFRMA_ALG_COMP:
1da177e4
LT		 52 break;
53
54 default:
55 return -EINVAL;
3ff50b79 56 }
1da177e4 57
633439f5 58 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
1da177e4
LT		 59 return 0;
60}
61
4447bb33
MW		 62static int verify_auth_trunc(struct nlattr **attrs)
63{
64 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
65 struct xfrm_algo_auth *algp;
66
67 if (!rt)
68 return 0;
69
70 algp = nla_data(rt);
1bd963a7 71 if (nla_len(rt) < (int)xfrm_alg_auth_len(algp))
4447bb33
MW		 72 return -EINVAL;
73
633439f5 74 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
4447bb33
MW		 75 return 0;
76}
77
1a6509d9
HX		 78static int verify_aead(struct nlattr **attrs)
79{
80 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
81 struct xfrm_algo_aead *algp;
82
83 if (!rt)
84 return 0;
85
86 algp = nla_data(rt);
373b8eeb 87 if (nla_len(rt) < (int)aead_len(algp))
1a6509d9
HX		 88 return -EINVAL;
89
633439f5 90 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
1a6509d9
HX		 91 return 0;
92}
93
5424f32e 94static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 95 xfrm_address_t **addrp)
96{
5424f32e 97 struct nlattr *rt = attrs[type];
eb2971b6 98
cf5cb79f 99 if (rt && addrp)
5424f32e 100 *addrp = nla_data(rt);
eb2971b6 101}
df71837d 102
5424f32e 103static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 104{
5424f32e 105 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 106 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 107
108 if (!rt)
109 return 0;
110
5424f32e 111 uctx = nla_data(rt);
cf5cb79f 112 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 113 return -EINVAL;
114
115 return 0;
116}
117
d8647b79
SK		 118static inline int verify_replay(struct xfrm_usersa_info *p,
119 struct nlattr **attrs)
120{
121 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
ecd79187 122 struct xfrm_replay_state_esn *rs;
d8647b79 123
75351d1a
FW		 124 if (!rt)
125 return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0;
ecd79187 126
75351d1a 127 rs = nla_data(rt);
ecd79187 128
75351d1a
FW		 129 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
130 return -EINVAL;
7833aa05 131
75351d1a
FW		 132 if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
133 nla_len(rt) != sizeof(*rs))
134 return -EINVAL;
d8647b79 135
01714109
FD		 136 /* As only ESP and AH support ESN feature. */
137 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
02aadf72
SK		 138 return -EINVAL;
139
d8647b79
SK		 140 if (p->replay_window != 0)
141 return -EINVAL;
142
143 return 0;
144}
df71837d 145
1da177e4 146static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 147 struct nlattr **attrs)
1da177e4
LT		 148{
149 int err;
150
151 err = -EINVAL;
152 switch (p->family) {
153 case AF_INET:
154 break;
155
156 case AF_INET6:
dfd56b8b 157#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 158 break;
159#else
160 err = -EAFNOSUPPORT;
161 goto out;
162#endif
163
164 default:
165 goto out;
3ff50b79 166 }
1da177e4
LT		 167
168 err = -EINVAL;
169 switch (p->id.proto) {
170 case IPPROTO_AH:
4447bb33
MW		 171 if ((!attrs[XFRMA_ALG_AUTH] &&
172 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 173 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 174 attrs[XFRMA_ALG_CRYPT] ||
35d2856b 175 attrs[XFRMA_ALG_COMP] ||
a0e5ef53 176 attrs[XFRMA_TFCPAD])
1da177e4
LT		 177 goto out;
178 break;
179
180 case IPPROTO_ESP:
1a6509d9
HX		 181 if (attrs[XFRMA_ALG_COMP])
182 goto out;
183 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 184 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 185 !attrs[XFRMA_ALG_CRYPT] &&
186 !attrs[XFRMA_ALG_AEAD])
187 goto out;
188 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 189 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 190 attrs[XFRMA_ALG_CRYPT]) &&
191 attrs[XFRMA_ALG_AEAD])
1da177e4 192 goto out;
35d2856b
MW		 193 if (attrs[XFRMA_TFCPAD] &&
194 p->mode != XFRM_MODE_TUNNEL)
195 goto out;
1da177e4
LT		 196 break;
197
198 case IPPROTO_COMP:
35a7aa08 199 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 200 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 201 attrs[XFRMA_ALG_AUTH] ||
4447bb33 202 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b 203 attrs[XFRMA_ALG_CRYPT] ||
a0e5ef53
TB		 204 attrs[XFRMA_TFCPAD] ||
205 (ntohl(p->id.spi) >= 0x10000))
1da177e4
LT		 206 goto out;
207 break;
208
dfd56b8b 209#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 210 case IPPROTO_DSTOPTS:
211 case IPPROTO_ROUTING:
35a7aa08
TG		 212 if (attrs[XFRMA_ALG_COMP] ||
213 attrs[XFRMA_ALG_AUTH] ||
4447bb33 214 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 215 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 216 attrs[XFRMA_ALG_CRYPT] ||
217 attrs[XFRMA_ENCAP] ||
218 attrs[XFRMA_SEC_CTX] ||
35d2856b 219 attrs[XFRMA_TFCPAD] ||
35a7aa08 220 !attrs[XFRMA_COADDR])
e23c7194
MN		 221 goto out;
222 break;
223#endif
224
1da177e4
LT		 225 default:
226 goto out;
3ff50b79 227 }
1da177e4 228
1a6509d9
HX		 229 if ((err = verify_aead(attrs)))
230 goto out;
4447bb33
MW		 231 if ((err = verify_auth_trunc(attrs)))
232 goto out;
35a7aa08 233 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 234 goto out;
35a7aa08 235 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 236 goto out;
35a7aa08 237 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 238 goto out;
35a7aa08 239 if ((err = verify_sec_ctx_len(attrs)))
df71837d 240 goto out;
d8647b79
SK		 241 if ((err = verify_replay(p, attrs)))
242 goto out;
1da177e4
LT		 243
244 err = -EINVAL;
245 switch (p->mode) {
7e49e6de
MN		 246 case XFRM_MODE_TRANSPORT:
247 case XFRM_MODE_TUNNEL:
060f02a3 248 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 249 case XFRM_MODE_BEET:
1da177e4
LT		 250 break;
251
252 default:
253 goto out;
3ff50b79 254 }
1da177e4
LT		 255
256 err = 0;
257
258out:
259 return err;
260}
261
262static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 263 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 264 struct nlattr *rta)
1da177e4 265{
1da177e4
LT		 266 struct xfrm_algo *p, *ualg;
267 struct xfrm_algo_desc *algo;
268
269 if (!rta)
270 return 0;
271
5424f32e 272 ualg = nla_data(rta);
1da177e4
LT		 273
274 algo = get_byname(ualg->alg_name, 1);
275 if (!algo)
276 return -ENOSYS;
277 *props = algo->desc.sadb_alg_id;
278
0f99be0d 279 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 280 if (!p)
281 return -ENOMEM;
282
04ff1260 283 strcpy(p->alg_name, algo->name);
1da177e4
LT		 284 *algpp = p;
285 return 0;
286}
287
69b0137f
HX		 288static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
289{
290 struct xfrm_algo *p, *ualg;
291 struct xfrm_algo_desc *algo;
292
293 if (!rta)
294 return 0;
295
296 ualg = nla_data(rta);
297
298 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
299 if (!algo)
300 return -ENOSYS;
301 x->props.ealgo = algo->desc.sadb_alg_id;
302
303 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
304 if (!p)
305 return -ENOMEM;
306
307 strcpy(p->alg_name, algo->name);
308 x->ealg = p;
309 x->geniv = algo->uinfo.encr.geniv;
310 return 0;
311}
312
4447bb33
MW		 313static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
314 struct nlattr *rta)
315{
316 struct xfrm_algo *ualg;
317 struct xfrm_algo_auth *p;
318 struct xfrm_algo_desc *algo;
319
320 if (!rta)
321 return 0;
322
323 ualg = nla_data(rta);
324
325 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
326 if (!algo)
327 return -ENOSYS;
328 *props = algo->desc.sadb_alg_id;
329
330 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
331 if (!p)
332 return -ENOMEM;
333
334 strcpy(p->alg_name, algo->name);
335 p->alg_key_len = ualg->alg_key_len;
336 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
337 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
338
339 *algpp = p;
340 return 0;
341}
342
343static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
344 struct nlattr *rta)
345{
346 struct xfrm_algo_auth *p, *ualg;
347 struct xfrm_algo_desc *algo;
348
349 if (!rta)
350 return 0;
351
352 ualg = nla_data(rta);
353
354 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
355 if (!algo)
356 return -ENOSYS;
689f1c9d 357 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 358 return -EINVAL;
359 *props = algo->desc.sadb_alg_id;
360
361 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
362 if (!p)
363 return -ENOMEM;
364
365 strcpy(p->alg_name, algo->name);
366 if (!p->alg_trunc_len)
367 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
368
369 *algpp = p;
370 return 0;
371}
372
69b0137f 373static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
1a6509d9
HX		 374{
375 struct xfrm_algo_aead *p, *ualg;
376 struct xfrm_algo_desc *algo;
377
378 if (!rta)
379 return 0;
380
381 ualg = nla_data(rta);
382
383 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
384 if (!algo)
385 return -ENOSYS;
69b0137f 386 x->props.ealgo = algo->desc.sadb_alg_id;
1a6509d9
HX		 387
388 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
389 if (!p)
390 return -ENOMEM;
391
392 strcpy(p->alg_name, algo->name);
69b0137f
HX		 393 x->aead = p;
394 x->geniv = algo->uinfo.aead.geniv;
1a6509d9
HX		 395 return 0;
396}
397
e2b19125
SK		 398static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
399 struct nlattr *rp)
400{
401 struct xfrm_replay_state_esn *up;
5e708e47 402 unsigned int ulen;
e2b19125
SK		 403
404 if (!replay_esn || !rp)
405 return 0;
406
407 up = nla_data(rp);
ecd79187 408 ulen = xfrm_replay_state_esn_len(up);
e2b19125 409
f843ee6d
AW		 410 /* Check the overall length and the internal bitmap length to avoid
411 * potential overflow. */
5e708e47 412 if (nla_len(rp) < (int)ulen ||
f843ee6d
AW		 413 xfrm_replay_state_esn_len(replay_esn) != ulen ||
414 replay_esn->bmp_len != up->bmp_len)
e2b19125
SK		 415 return -EINVAL;
416
677e806d
AW		 417 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
418 return -EINVAL;
419
e2b19125
SK		 420 return 0;
421}
422
d8647b79
SK		 423static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
424 struct xfrm_replay_state_esn **preplay_esn,
425 struct nlattr *rta)
426{
427 struct xfrm_replay_state_esn *p, *pp, *up;
5e708e47 428 unsigned int klen, ulen;
d8647b79
SK		 429
430 if (!rta)
431 return 0;
432
433 up = nla_data(rta);
ecd79187 434 klen = xfrm_replay_state_esn_len(up);
5e708e47 435 ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);
d8647b79 436
ecd79187 437 p = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 438 if (!p)
439 return -ENOMEM;
440
ecd79187 441 pp = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 442 if (!pp) {
443 kfree(p);
444 return -ENOMEM;
445 }
446
ecd79187
MK		 447 memcpy(p, up, ulen);
448 memcpy(pp, up, ulen);
449
d8647b79
SK		 450 *replay_esn = p;
451 *preplay_esn = pp;
452
453 return 0;
454}
455
a1b831f2 456static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 457{
a1b831f2 458 unsigned int len = 0;
df71837d
TJ		 459
460 if (xfrm_ctx) {
461 len += sizeof(struct xfrm_user_sec_ctx);
462 len += xfrm_ctx->ctx_len;
463 }
464 return len;
465}
466
1da177e4
LT		 467static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
468{
469 memcpy(&x->id, &p->id, sizeof(x->id));
470 memcpy(&x->sel, &p->sel, sizeof(x->sel));
471 memcpy(&x->lft, &p->lft, sizeof(x->lft));
472 x->props.mode = p->mode;
33fce60d
FD		 473 x->props.replay_window = min_t(unsigned int, p->replay_window,
474 sizeof(x->replay.bitmap) * 8);
1da177e4
LT		 475 x->props.reqid = p->reqid;
476 x->props.family = p->family;
54489c14 477 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 478 x->props.flags = p->flags;
196b0036 479
ccf9b3b8 480 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 481 x->sel.family = p->family;
1da177e4
LT		 482}
483
d51d081d
JHS		 484/*
485 * someday when pfkey also has support, we could have the code
486 * somehow made shareable and move it to xfrm_state.c - JHS
487 *
488*/
e3ac104d
MK		 489static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
490 int update_esn)
d51d081d 491{
5424f32e 492 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
e3ac104d 493 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
5424f32e
TG		 494 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
495 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
496 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 497
d8647b79
SK		 498 if (re) {
499 struct xfrm_replay_state_esn *replay_esn;
500 replay_esn = nla_data(re);
501 memcpy(x->replay_esn, replay_esn,
502 xfrm_replay_state_esn_len(replay_esn));
503 memcpy(x->preplay_esn, replay_esn,
504 xfrm_replay_state_esn_len(replay_esn));
505 }
506
d51d081d
JHS		 507 if (rp) {
508 struct xfrm_replay_state *replay;
5424f32e 509 replay = nla_data(rp);
d51d081d
JHS		 510 memcpy(&x->replay, replay, sizeof(*replay));
511 memcpy(&x->preplay, replay, sizeof(*replay));
512 }
513
514 if (lt) {
515 struct xfrm_lifetime_cur *ltime;
5424f32e 516 ltime = nla_data(lt);
d51d081d
JHS		 517 x->curlft.bytes = ltime->bytes;
518 x->curlft.packets = ltime->packets;
519 x->curlft.add_time = ltime->add_time;
520 x->curlft.use_time = ltime->use_time;
521 }
522
cf5cb79f 523 if (et)
5424f32e 524 x->replay_maxage = nla_get_u32(et);
d51d081d 525
cf5cb79f 526 if (rt)
5424f32e 527 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 528}
529
fc34acd3
AD		 530static struct xfrm_state *xfrm_state_construct(struct net *net,
531 struct xfrm_usersa_info *p,
5424f32e 532 struct nlattr **attrs,
1da177e4
LT		 533 int *errp)
534{
fc34acd3 535 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 536 int err = -ENOMEM;
537
538 if (!x)
539 goto error_no_put;
540
541 copy_from_user_state(x, p);
542
a947b0a9
ND		 543 if (attrs[XFRMA_SA_EXTRA_FLAGS])
544 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
545
69b0137f 546 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
1a6509d9 547 goto error;
4447bb33
MW		 548 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
549 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 550 goto error;
4447bb33
MW		 551 if (!x->props.aalgo) {
552 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
553 attrs[XFRMA_ALG_AUTH])))
554 goto error;
555 }
69b0137f 556 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 557 goto error;
558 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
559 xfrm_calg_get_byname,
35a7aa08 560 attrs[XFRMA_ALG_COMP])))
1da177e4 561 goto error;
fd21150a
TG		 562
563 if (attrs[XFRMA_ENCAP]) {
564 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
565 sizeof(*x->encap), GFP_KERNEL);
566 if (x->encap == NULL)
567 goto error;
568 }
569
35d2856b
MW		 570 if (attrs[XFRMA_TFCPAD])
571 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
572
fd21150a
TG		 573 if (attrs[XFRMA_COADDR]) {
574 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
575 sizeof(*x->coaddr), GFP_KERNEL);
576 if (x->coaddr == NULL)
577 goto error;
578 }
579
6f26b61e
JHS		 580 xfrm_mark_get(attrs, &x->mark);
581
077fbac4
LC		 582 if (attrs[XFRMA_OUTPUT_MARK])
583 x->props.output_mark = nla_get_u32(attrs[XFRMA_OUTPUT_MARK]);
584
ffdb5211 585 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
1da177e4
LT		 586 if (err)
587 goto error;
588
2f30ea50
MK		 589 if (attrs[XFRMA_SEC_CTX]) {
590 err = security_xfrm_state_alloc(x,
591 nla_data(attrs[XFRMA_SEC_CTX]));
592 if (err)
593 goto error;
594 }
df71837d 595
d8647b79
SK		 596 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
597 attrs[XFRMA_REPLAY_ESN_VAL])))
598 goto error;
599
1da177e4 600 x->km.seq = p->seq;
b27aeadb 601 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 602 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 603 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 604
9fdc4883
SK		 605 if ((err = xfrm_init_replay(x)))
606 goto error;
d51d081d 607
9fdc4883 608 /* override default values from above */
e3ac104d 609 xfrm_update_ae_params(x, attrs, 0);
1da177e4 610
cc01572e
YK		 611 /* configure the hardware if offload is requested */
612 if (attrs[XFRMA_OFFLOAD_DEV]) {
613 err = xfrm_dev_state_add(net, x,
614 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
615 if (err)
616 goto error;
617 }
618
1da177e4
LT		 619 return x;
620
621error:
622 x->km.state = XFRM_STATE_DEAD;
623 xfrm_state_put(x);
624error_no_put:
625 *errp = err;
626 return NULL;
627}
628
22e70050 629static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 630 struct nlattr **attrs)
1da177e4 631{
fc34acd3 632 struct net *net = sock_net(skb->sk);
7b67c857 633 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 634 struct xfrm_state *x;
635 int err;
26b15dad 636 struct km_event c;
1da177e4 637
35a7aa08 638 err = verify_newsa_info(p, attrs);
1da177e4
LT		 639 if (err)
640 return err;
641
fc34acd3 642 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 643 if (!x)
644 return err;
645
26b15dad 646 xfrm_state_hold(x);
1da177e4
LT		 647 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
648 err = xfrm_state_add(x);
649 else
650 err = xfrm_state_update(x);
651
2e71029e 652 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 653
1da177e4
LT		 654 if (err < 0) {
655 x->km.state = XFRM_STATE_DEAD;
c5d4d7d8 656 xfrm_dev_state_delete(x);
21380b81 657 __xfrm_state_put(x);
7d6dfe1f 658 goto out;
1da177e4
LT		 659 }
660
cc01572e
YK		 661 if (x->km.state == XFRM_STATE_VOID)
662 x->km.state = XFRM_STATE_VALID;
663
26b15dad 664 c.seq = nlh->nlmsg_seq;
15e47304 665 c.portid = nlh->nlmsg_pid;
f60f6b8f 666 c.event = nlh->nlmsg_type;
26b15dad
JHS		 667
668 km_state_notify(x, &c);
7d6dfe1f 669out:
26b15dad 670 xfrm_state_put(x);
1da177e4
LT		 671 return err;
672}
673
fc34acd3
AD		 674static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
675 struct xfrm_usersa_id *p,
5424f32e 676 struct nlattr **attrs,
eb2971b6
MN		 677 int *errp)
678{
679 struct xfrm_state *x = NULL;
6f26b61e 680 struct xfrm_mark m;
eb2971b6 681 int err;
6f26b61e 682 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 683
684 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
685 err = -ESRCH;
6f26b61e 686 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 687 } else {
688 xfrm_address_t *saddr = NULL;
689
35a7aa08 690 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 691 if (!saddr) {
692 err = -EINVAL;
693 goto out;
694 }
695
9abbffee 696 err = -ESRCH;
6f26b61e
JHS		 697 x = xfrm_state_lookup_byaddr(net, mark,
698 &p->daddr, saddr,
221df1ed 699 p->proto, p->family);
eb2971b6
MN		 700 }
701
702 out:
703 if (!x && errp)
704 *errp = err;
705 return x;
706}
707
22e70050 708static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 709 struct nlattr **attrs)
1da177e4 710{
fc34acd3 711 struct net *net = sock_net(skb->sk);
1da177e4 712 struct xfrm_state *x;
eb2971b6 713 int err = -ESRCH;
26b15dad 714 struct km_event c;
7b67c857 715 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4 716
fc34acd3 717 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 718 if (x == NULL)
eb2971b6 719 return err;
1da177e4 720
6f68dc37 721 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 722 goto out;
723
1da177e4 724 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 725 err = -EPERM;
726 goto out;
1da177e4
LT		 727 }
728
26b15dad 729 err = xfrm_state_delete(x);
161a09e7 730
c8c05a8e
CZ		 731 if (err < 0)
732 goto out;
26b15dad
JHS		 733
734 c.seq = nlh->nlmsg_seq;
15e47304 735 c.portid = nlh->nlmsg_pid;
f60f6b8f 736 c.event = nlh->nlmsg_type;
26b15dad 737 km_state_notify(x, &c);
1da177e4 738
c8c05a8e 739out:
2e71029e 740 xfrm_audit_state_delete(x, err ? 0 : 1, true);
c8c05a8e 741 xfrm_state_put(x);
26b15dad 742 return err;
1da177e4
LT		 743}
744
745static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
746{
f778a636 747 memset(p, 0, sizeof(*p));
1da177e4
LT		 748 memcpy(&p->id, &x->id, sizeof(p->id));
749 memcpy(&p->sel, &x->sel, sizeof(p->sel));
750 memcpy(&p->lft, &x->lft, sizeof(p->lft));
751 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
e33d4f13
SV		 752 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
753 put_unaligned(x->stats.replay, &p->stats.replay);
754 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
54489c14 755 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 756 p->mode = x->props.mode;
757 p->replay_window = x->props.replay_window;
758 p->reqid = x->props.reqid;
759 p->family = x->props.family;
760 p->flags = x->props.flags;
761 p->seq = x->km.seq;
762}
763
764struct xfrm_dump_info {
765 struct sk_buff *in_skb;
766 struct sk_buff *out_skb;
767 u32 nlmsg_seq;
768 u16 nlmsg_flags;
1da177e4
LT		 769};
770
c0144bea
TG		 771static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
772{
c0144bea
TG		 773 struct xfrm_user_sec_ctx *uctx;
774 struct nlattr *attr;
68325d3b 775 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 776
777 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
778 if (attr == NULL)
779 return -EMSGSIZE;
780
781 uctx = nla_data(attr);
782 uctx->exttype = XFRMA_SEC_CTX;
783 uctx->len = ctx_size;
784 uctx->ctx_doi = s->ctx_doi;
785 uctx->ctx_alg = s->ctx_alg;
786 uctx->ctx_len = s->ctx_len;
787 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
788
789 return 0;
790}
791
d77e38e6
SK		 792static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
793{
794 struct xfrm_user_offload *xuo;
795 struct nlattr *attr;
796
797 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
798 if (attr == NULL)
799 return -EMSGSIZE;
800
801 xuo = nla_data(attr);
5fe0d4bd 802 memset(xuo, 0, sizeof(*xuo));
d77e38e6
SK		 803 xuo->ifindex = xso->dev->ifindex;
804 xuo->flags = xso->flags;
805
806 return 0;
807}
808
4447bb33
MW		 809static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
810{
811 struct xfrm_algo *algo;
812 struct nlattr *nla;
813
814 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
815 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
816 if (!nla)
817 return -EMSGSIZE;
818
819 algo = nla_data(nla);
4c87308b 820 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
4447bb33
MW		 821 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
822 algo->alg_key_len = auth->alg_key_len;
823
824 return 0;
825}
826
68325d3b
HX		 827/* Don't change this without updating xfrm_sa_len! */
828static int copy_to_user_state_extra(struct xfrm_state *x,
829 struct xfrm_usersa_info *p,
830 struct sk_buff *skb)
1da177e4 831{
1d1e34dd 832 int ret = 0;
d0fde795 833
1d1e34dd 834 copy_to_user_state(x, p);
68325d3b 835
a947b0a9
ND		 836 if (x->props.extra_flags) {
837 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
838 x->props.extra_flags);
839 if (ret)
840 goto out;
841 }
842
1d1e34dd
DM		 843 if (x->coaddr) {
844 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
845 if (ret)
846 goto out;
847 }
848 if (x->lastused) {
de95c4a4
ND		 849 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
850 XFRMA_PAD);
1d1e34dd
DM		 851 if (ret)
852 goto out;
853 }
854 if (x->aead) {
855 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
856 if (ret)
857 goto out;
858 }
859 if (x->aalg) {
860 ret = copy_to_user_auth(x->aalg, skb);
861 if (!ret)
862 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
863 xfrm_alg_auth_len(x->aalg), x->aalg);
864 if (ret)
865 goto out;
866 }
867 if (x->ealg) {
868 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
869 if (ret)
870 goto out;
871 }
872 if (x->calg) {
873 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
874 if (ret)
875 goto out;
876 }
877 if (x->encap) {
878 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
879 if (ret)
880 goto out;
881 }
882 if (x->tfcpad) {
883 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
884 if (ret)
885 goto out;
886 }
887 ret = xfrm_mark_put(skb, &x->mark);
888 if (ret)
889 goto out;
f293a5e3 890 if (x->replay_esn)
1d1e34dd
DM		 891 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
892 xfrm_replay_state_esn_len(x->replay_esn),
893 x->replay_esn);
f293a5e3 894 else
895 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
896 &x->replay);
897 if (ret)
898 goto out;
d77e38e6
SK		 899 if(x->xso.dev)
900 ret = copy_user_offload(&x->xso, skb);
901 if (ret)
902 goto out;
077fbac4
LC		 903 if (x->props.output_mark) {
904 ret = nla_put_u32(skb, XFRMA_OUTPUT_MARK, x->props.output_mark);
905 if (ret)
906 goto out;
907 }
8598112d
SK		 908 if (x->security)
909 ret = copy_sec_ctx(x->security, skb);
1d1e34dd
DM		 910out:
911 return ret;
68325d3b
HX		 912}
913
914static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
915{
916 struct xfrm_dump_info *sp = ptr;
917 struct sk_buff *in_skb = sp->in_skb;
918 struct sk_buff *skb = sp->out_skb;
919 struct xfrm_usersa_info *p;
920 struct nlmsghdr *nlh;
921 int err;
922
15e47304 923 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 924 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
925 if (nlh == NULL)
926 return -EMSGSIZE;
927
928 p = nlmsg_data(nlh);
929
930 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 931 if (err) {
932 nlmsg_cancel(skb, nlh);
933 return err;
934 }
9825069d 935 nlmsg_end(skb, nlh);
1da177e4 936 return 0;
1da177e4
LT		 937}
938
4c563f76
TT		 939static int xfrm_dump_sa_done(struct netlink_callback *cb)
940{
941 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 942 struct sock *sk = cb->skb->sk;
943 struct net *net = sock_net(sk);
944
1ba5bf99
VN		 945 if (cb->args[0])
946 xfrm_state_walk_done(walk, net);
4c563f76
TT		 947 return 0;
948}
949
d3623099 950static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
1da177e4
LT		 951static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
952{
fc34acd3 953 struct net *net = sock_net(skb->sk);
4c563f76 954 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 955 struct xfrm_dump_info info;
956
4c563f76
TT		 957 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
958 sizeof(cb->args) - sizeof(cb->args[0]));
959
1da177e4
LT		 960 info.in_skb = cb->skb;
961 info.out_skb = skb;
962 info.nlmsg_seq = cb->nlh->nlmsg_seq;
963 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 964
965 if (!cb->args[0]) {
d3623099 966 struct nlattr *attrs[XFRMA_MAX+1];
870a2df4 967 struct xfrm_address_filter *filter = NULL;
d3623099
ND		 968 u8 proto = 0;
969 int err;
970
fceb6435
JB		 971 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy,
972 NULL);
d3623099
ND		 973 if (err < 0)
974 return err;
975
870a2df4 976 if (attrs[XFRMA_ADDRESS_FILTER]) {
df367561
AH		 977 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
978 sizeof(*filter), GFP_KERNEL);
d3623099
ND		 979 if (filter == NULL)
980 return -ENOMEM;
d3623099
ND		 981 }
982
983 if (attrs[XFRMA_PROTO])
984 proto = nla_get_u8(attrs[XFRMA_PROTO]);
985
986 xfrm_state_walk_init(walk, proto, filter);
1ba5bf99 987 cb->args[0] = 1;
4c563f76
TT		 988 }
989
fc34acd3 990 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 991
992 return skb->len;
993}
994
995static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
996 struct xfrm_state *x, u32 seq)
997{
998 struct xfrm_dump_info info;
999 struct sk_buff *skb;
864745d2 1000 int err;
1da177e4 1001
7deb2264 1002 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 1003 if (!skb)
1004 return ERR_PTR(-ENOMEM);
1005
1da177e4
LT		 1006 info.in_skb = in_skb;
1007 info.out_skb = skb;
1008 info.nlmsg_seq = seq;
1009 info.nlmsg_flags = 0;
1da177e4 1010
864745d2
MK		 1011 err = dump_one_state(x, 0, &info);
1012 if (err) {
1da177e4 1013 kfree_skb(skb);
864745d2 1014 return ERR_PTR(err);
1da177e4
LT		 1015 }
1016
1017 return skb;
1018}
1019
21ee543e
MK		 1020/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1021 * Must be called with RCU read lock.
1022 */
1023static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1024 u32 pid, unsigned int group)
1025{
1026 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1027
1028 if (nlsk)
1029 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1030 else
1031 return -1;
1032}
1033
a1b831f2 1034static inline unsigned int xfrm_spdinfo_msgsize(void)
7deb2264
TG		 1035{
1036 return NLMSG_ALIGN(4)
1037 + nla_total_size(sizeof(struct xfrmu_spdinfo))
880a6fab
CG		 1038 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1039 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1040 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
7deb2264
TG		 1041}
1042
e071041b 1043static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 1044 u32 portid, u32 seq, u32 flags)
ecfd6b18 1045{
5a6d3416
JHS		 1046 struct xfrmk_spdinfo si;
1047 struct xfrmu_spdinfo spc;
1048 struct xfrmu_spdhinfo sph;
880a6fab 1049 struct xfrmu_spdhthresh spt4, spt6;
ecfd6b18 1050 struct nlmsghdr *nlh;
1d1e34dd 1051 int err;
ecfd6b18 1052 u32 *f;
880a6fab 1053 unsigned lseq;
ecfd6b18 1054
15e47304 1055 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 1056 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 1057 return -EMSGSIZE;
1058
1059 f = nlmsg_data(nlh);
1060 *f = flags;
e071041b 1061 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 1062 spc.incnt = si.incnt;
1063 spc.outcnt = si.outcnt;
1064 spc.fwdcnt = si.fwdcnt;
1065 spc.inscnt = si.inscnt;
1066 spc.outscnt = si.outscnt;
1067 spc.fwdscnt = si.fwdscnt;
1068 sph.spdhcnt = si.spdhcnt;
1069 sph.spdhmcnt = si.spdhmcnt;
1070
880a6fab
CG		 1071 do {
1072 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1073
1074 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1075 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1076 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1077 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1078 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1079
1d1e34dd
DM		 1080 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1081 if (!err)
1082 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
880a6fab
CG		 1083 if (!err)
1084 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1085 if (!err)
1086 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1d1e34dd
DM		 1087 if (err) {
1088 nlmsg_cancel(skb, nlh);
1089 return err;
1090 }
ecfd6b18 1091
053c095a
JB		 1092 nlmsg_end(skb, nlh);
1093 return 0;
ecfd6b18
JHS		 1094}
1095
880a6fab
CG		 1096static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1097 struct nlattr **attrs)
1098{
1099 struct net *net = sock_net(skb->sk);
1100 struct xfrmu_spdhthresh *thresh4 = NULL;
1101 struct xfrmu_spdhthresh *thresh6 = NULL;
1102
1103 /* selector prefixlen thresholds to hash policies */
1104 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1105 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1106
1107 if (nla_len(rta) < sizeof(*thresh4))
1108 return -EINVAL;
1109 thresh4 = nla_data(rta);
1110 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1111 return -EINVAL;
1112 }
1113 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1114 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1115
1116 if (nla_len(rta) < sizeof(*thresh6))
1117 return -EINVAL;
1118 thresh6 = nla_data(rta);
1119 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1120 return -EINVAL;
1121 }
1122
1123 if (thresh4 || thresh6) {
1124 write_seqlock(&net->xfrm.policy_hthresh.lock);
1125 if (thresh4) {
1126 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1127 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1128 }
1129 if (thresh6) {
1130 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1131 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1132 }
1133 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1134
1135 xfrm_policy_hash_rebuild(net);
1136 }
1137
1138 return 0;
1139}
1140
ecfd6b18 1141static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1142 struct nlattr **attrs)
ecfd6b18 1143{
a6483b79 1144 struct net *net = sock_net(skb->sk);
ecfd6b18 1145 struct sk_buff *r_skb;
7b67c857 1146 u32 *flags = nlmsg_data(nlh);
15e47304 1147 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 1148 u32 seq = nlh->nlmsg_seq;
2fc5f83b 1149 int err;
ecfd6b18 1150
7deb2264 1151 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 1152 if (r_skb == NULL)
1153 return -ENOMEM;
1154
2fc5f83b
GS		 1155 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1156 BUG_ON(err < 0);
ecfd6b18 1157
15e47304 1158 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 1159}
1160
a1b831f2 1161static inline unsigned int xfrm_sadinfo_msgsize(void)
7deb2264
TG		 1162{
1163 return NLMSG_ALIGN(4)
1164 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1165 + nla_total_size(4); /* XFRMA_SAD_CNT */
1166}
1167
e071041b 1168static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1169 u32 portid, u32 seq, u32 flags)
28d8909b 1170{
af11e316
JHS		 1171 struct xfrmk_sadinfo si;
1172 struct xfrmu_sadhinfo sh;
28d8909b 1173 struct nlmsghdr *nlh;
1d1e34dd 1174 int err;
28d8909b
JHS		 1175 u32 *f;
1176
15e47304 1177 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1178 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1179 return -EMSGSIZE;
1180
1181 f = nlmsg_data(nlh);
1182 *f = flags;
e071041b 1183 xfrm_sad_getinfo(net, &si);
28d8909b 1184
af11e316
JHS		 1185 sh.sadhmcnt = si.sadhmcnt;
1186 sh.sadhcnt = si.sadhcnt;
1187
1d1e34dd
DM		 1188 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1189 if (!err)
1190 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1191 if (err) {
1192 nlmsg_cancel(skb, nlh);
1193 return err;
1194 }
28d8909b 1195
053c095a
JB		 1196 nlmsg_end(skb, nlh);
1197 return 0;
28d8909b
JHS		 1198}
1199
1200static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1201 struct nlattr **attrs)
28d8909b 1202{
a6483b79 1203 struct net *net = sock_net(skb->sk);
28d8909b 1204 struct sk_buff *r_skb;
7b67c857 1205 u32 *flags = nlmsg_data(nlh);
15e47304 1206 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1207 u32 seq = nlh->nlmsg_seq;
2fc5f83b 1208 int err;
28d8909b 1209
7deb2264 1210 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1211 if (r_skb == NULL)
1212 return -ENOMEM;
1213
2fc5f83b
GS		 1214 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1215 BUG_ON(err < 0);
28d8909b 1216
15e47304 1217 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1218}
1219
22e70050 1220static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1221 struct nlattr **attrs)
1da177e4 1222{
fc34acd3 1223 struct net *net = sock_net(skb->sk);
7b67c857 1224 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1225 struct xfrm_state *x;
1226 struct sk_buff *resp_skb;
eb2971b6 1227 int err = -ESRCH;
1da177e4 1228
fc34acd3 1229 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1230 if (x == NULL)
1231 goto out_noput;
1232
1233 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1234 if (IS_ERR(resp_skb)) {
1235 err = PTR_ERR(resp_skb);
1236 } else {
15e47304 1237 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1238 }
1239 xfrm_state_put(x);
1240out_noput:
1241 return err;
1242}
1243
22e70050 1244static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1245 struct nlattr **attrs)
1da177e4 1246{
fc34acd3 1247 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1248 struct xfrm_state *x;
1249 struct xfrm_userspi_info *p;
1250 struct sk_buff *resp_skb;
1251 xfrm_address_t *daddr;
1252 int family;
1253 int err;
6f26b61e
JHS		 1254 u32 mark;
1255 struct xfrm_mark m;
1da177e4 1256
7b67c857 1257 p = nlmsg_data(nlh);
776e9dd9 1258 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1259 if (err)
1260 goto out_noput;
1261
1262 family = p->info.family;
1263 daddr = &p->info.id.daddr;
1264
1265 x = NULL;
6f26b61e
JHS		 1266
1267 mark = xfrm_mark_get(attrs, &m);
1da177e4 1268 if (p->info.seq) {
6f26b61e 1269 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1270 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1271 xfrm_state_put(x);
1272 x = NULL;
1273 }
1274 }
1275
1276 if (!x)
6f26b61e 1277 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1278 p->info.id.proto, daddr,
1279 &p->info.saddr, 1,
1280 family);
1281 err = -ENOENT;
1282 if (x == NULL)
1283 goto out_noput;
1284
658b219e
HX		 1285 err = xfrm_alloc_spi(x, p->min, p->max);
1286 if (err)
1287 goto out;
1da177e4 1288
658b219e 1289 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1290 if (IS_ERR(resp_skb)) {
1291 err = PTR_ERR(resp_skb);
1292 goto out;
1293 }
1294
15e47304 1295 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1296
1297out:
1298 xfrm_state_put(x);
1299out_noput:
1300 return err;
1301}
1302
b798a9ed 1303static int verify_policy_dir(u8 dir)
1da177e4
LT		 1304{
1305 switch (dir) {
1306 case XFRM_POLICY_IN:
1307 case XFRM_POLICY_OUT:
1308 case XFRM_POLICY_FWD:
1309 break;
1310
1311 default:
1312 return -EINVAL;
3ff50b79 1313 }
1da177e4
LT		 1314
1315 return 0;
1316}
1317
b798a9ed 1318static int verify_policy_type(u8 type)
f7b6983f
MN		 1319{
1320 switch (type) {
1321 case XFRM_POLICY_TYPE_MAIN:
1322#ifdef CONFIG_XFRM_SUB_POLICY
1323 case XFRM_POLICY_TYPE_SUB:
1324#endif
1325 break;
1326
1327 default:
1328 return -EINVAL;
3ff50b79 1329 }
f7b6983f
MN		 1330
1331 return 0;
1332}
1333
1da177e4
LT		 1334static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1335{
e682adf0
FD		 1336 int ret;
1337
1da177e4
LT		 1338 switch (p->share) {
1339 case XFRM_SHARE_ANY:
1340 case XFRM_SHARE_SESSION:
1341 case XFRM_SHARE_USER:
1342 case XFRM_SHARE_UNIQUE:
1343 break;
1344
1345 default:
1346 return -EINVAL;
3ff50b79 1347 }
1da177e4
LT		 1348
1349 switch (p->action) {
1350 case XFRM_POLICY_ALLOW:
1351 case XFRM_POLICY_BLOCK:
1352 break;
1353
1354 default:
1355 return -EINVAL;
3ff50b79 1356 }
1da177e4
LT		 1357
1358 switch (p->sel.family) {
1359 case AF_INET:
1360 break;
1361
1362 case AF_INET6:
dfd56b8b 1363#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1364 break;
1365#else
1366 return -EAFNOSUPPORT;
1367#endif
1368
1369 default:
1370 return -EINVAL;
3ff50b79 1371 }
1da177e4 1372
e682adf0
FD		 1373 ret = verify_policy_dir(p->dir);
1374 if (ret)
1375 return ret;
1376 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1377 return -EINVAL;
1378
1379 return 0;
1da177e4
LT		 1380}
1381
5424f32e 1382static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1383{
5424f32e 1384 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1385 struct xfrm_user_sec_ctx *uctx;
1386
1387 if (!rt)
1388 return 0;
1389
5424f32e 1390 uctx = nla_data(rt);
52a4c640 1391 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1392}
1393
1da177e4
LT		 1394static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1395 int nr)
1396{
1397 int i;
1398
1399 xp->xfrm_nr = nr;
1400 for (i = 0; i < nr; i++, ut++) {
1401 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1402
1403 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1404 memcpy(&t->saddr, &ut->saddr,
1405 sizeof(xfrm_address_t));
1406 t->reqid = ut->reqid;
1407 t->mode = ut->mode;
1408 t->share = ut->share;
1409 t->optional = ut->optional;
1410 t->aalgos = ut->aalgos;
1411 t->ealgos = ut->ealgos;
1412 t->calgos = ut->calgos;
c5d18e98
HX		 1413 /* If all masks are ~0, then we allow all algorithms. */
1414 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1415 t->encap_family = ut->family;
1da177e4
LT		 1416 }
1417}
1418
b4ad86bf
DM		 1419static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1420{
732706af 1421 u16 prev_family;
b4ad86bf
DM		 1422 int i;
1423
1424 if (nr > XFRM_MAX_DEPTH)
1425 return -EINVAL;
1426
732706af
SK		 1427 prev_family = family;
1428
b4ad86bf
DM		 1429 for (i = 0; i < nr; i++) {
1430 /* We never validated the ut->family value, so many
1431 * applications simply leave it at zero. The check was
1432 * never made and ut->family was ignored because all
1433 * templates could be assumed to have the same family as
1434 * the policy itself. Now that we will have ipv4-in-ipv6
1435 * and ipv6-in-ipv4 tunnels, this is no longer true.
1436 */
1437 if (!ut[i].family)
1438 ut[i].family = family;
1439
732706af
SK		 1440 if ((ut[i].mode == XFRM_MODE_TRANSPORT) &&
1441 (ut[i].family != prev_family))
1442 return -EINVAL;
1443
1444 prev_family = ut[i].family;
1445
b4ad86bf
DM		 1446 switch (ut[i].family) {
1447 case AF_INET:
1448 break;
dfd56b8b 1449#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1450 case AF_INET6:
1451 break;
1452#endif
1453 default:
1454 return -EINVAL;
3ff50b79 1455 }
6a53b759
CW		 1456
1457 switch (ut[i].id.proto) {
1458 case IPPROTO_AH:
1459 case IPPROTO_ESP:
1460 case IPPROTO_COMP:
1461#if IS_ENABLED(CONFIG_IPV6)
1462 case IPPROTO_ROUTING:
1463 case IPPROTO_DSTOPTS:
1464#endif
1465 case IPSEC_PROTO_ANY:
1466 break;
1467 default:
1468 return -EINVAL;
1469 }
1470
b4ad86bf
DM		 1471 }
1472
1473 return 0;
1474}
1475
5424f32e 1476static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1477{
5424f32e 1478 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1479
1480 if (!rt) {
1481 pol->xfrm_nr = 0;
1482 } else {
5424f32e
TG		 1483 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1484 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1485 int err;
1da177e4 1486
b4ad86bf
DM		 1487 err = validate_tmpl(nr, utmpl, pol->family);
1488 if (err)
1489 return err;
1da177e4 1490
5424f32e 1491 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1492 }
1493 return 0;
1494}
1495
5424f32e 1496static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1497{
5424f32e 1498 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1499 struct xfrm_userpolicy_type *upt;
b798a9ed 1500 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1501 int err;
1502
1503 if (rt) {
5424f32e 1504 upt = nla_data(rt);
f7b6983f
MN		 1505 type = upt->type;
1506 }
1507
1508 err = verify_policy_type(type);
1509 if (err)
1510 return err;
1511
1512 *tp = type;
1513 return 0;
1514}
1515
1da177e4
LT		 1516static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1517{
1518 xp->priority = p->priority;
1519 xp->index = p->index;
1520 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1521 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1522 xp->action = p->action;
1523 xp->flags = p->flags;
1524 xp->family = p->sel.family;
1525 /* XXX xp->share = p->share; */
1526}
1527
1528static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1529{
7b789836 1530 memset(p, 0, sizeof(*p));
1da177e4
LT		 1531 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1532 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1533 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1534 p->priority = xp->priority;
1535 p->index = xp->index;
1536 p->sel.family = xp->family;
1537 p->dir = dir;
1538 p->action = xp->action;
1539 p->flags = xp->flags;
1540 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1541}
1542
fc34acd3 1543static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1544{
fc34acd3 1545 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1546 int err;
1547
1548 if (!xp) {
1549 *errp = -ENOMEM;
1550 return NULL;
1551 }
1552
1553 copy_from_user_policy(xp, p);
df71837d 1554
35a7aa08 1555 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1556 if (err)
1557 goto error;
1558
35a7aa08
TG		 1559 if (!(err = copy_from_user_tmpl(xp, attrs)))
1560 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1561 if (err)
1562 goto error;
1da177e4 1563
295fae56
JHS		 1564 xfrm_mark_get(attrs, &xp->mark);
1565
1da177e4 1566 return xp;
f7b6983f
MN		 1567 error:
1568 *errp = err;
12a169e7 1569 xp->walk.dead = 1;
64c31b3f 1570 xfrm_policy_destroy(xp);
f7b6983f 1571 return NULL;
1da177e4
LT		 1572}
1573
22e70050 1574static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1575 struct nlattr **attrs)
1da177e4 1576{
fc34acd3 1577 struct net *net = sock_net(skb->sk);
7b67c857 1578 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1579 struct xfrm_policy *xp;
26b15dad 1580 struct km_event c;
1da177e4
LT		 1581 int err;
1582 int excl;
1583
1584 err = verify_newpolicy_info(p);
df71837d
TJ		 1585 if (err)
1586 return err;
35a7aa08 1587 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1588 if (err)
1589 return err;
1590
fc34acd3 1591 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1592 if (!xp)
1593 return err;
1594
25985edc 1595 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1596 * Aha! this is anti-netlink really i.e more pfkey derived
1597 * in netlink excl is a flag and you wouldnt need
1598 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1599 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1600 err = xfrm_policy_insert(p->dir, xp, excl);
2e71029e 1601 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 1602
1da177e4 1603 if (err) {
03e1ad7b 1604 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1605 kfree(xp);
1606 return err;
1607 }
1608
f60f6b8f 1609 c.event = nlh->nlmsg_type;
26b15dad 1610 c.seq = nlh->nlmsg_seq;
15e47304 1611 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1612 km_policy_notify(xp, p->dir, &c);
1613
1da177e4
LT		 1614 xfrm_pol_put(xp);
1615
1616 return 0;
1617}
1618
1619static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1620{
1621 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1622 int i;
1623
1624 if (xp->xfrm_nr == 0)
1625 return 0;
1626
1627 for (i = 0; i < xp->xfrm_nr; i++) {
1628 struct xfrm_user_tmpl *up = &vec[i];
1629 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1630
1f86840f 1631 memset(up, 0, sizeof(*up));
1da177e4 1632 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1633 up->family = kp->encap_family;
1da177e4
LT		 1634 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1635 up->reqid = kp->reqid;
1636 up->mode = kp->mode;
1637 up->share = kp->share;
1638 up->optional = kp->optional;
1639 up->aalgos = kp->aalgos;
1640 up->ealgos = kp->ealgos;
1641 up->calgos = kp->calgos;
1642 }
df71837d 1643
c0144bea
TG		 1644 return nla_put(skb, XFRMA_TMPL,
1645 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1646}
1647
1648static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1649{
1650 if (x->security) {
1651 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1652 }
1653 return 0;
0d681623 1654}
df71837d 1655
0d681623
SH		 1656static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1657{
1d1e34dd 1658 if (xp->security)
0d681623 1659 return copy_sec_ctx(xp->security, skb);
0d681623 1660 return 0;
df71837d 1661}
a1b831f2 1662static inline unsigned int userpolicy_type_attrsize(void)
cfbfd45a
TG		 1663{
1664#ifdef CONFIG_XFRM_SUB_POLICY
1665 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1666#else
1667 return 0;
1668#endif
1669}
df71837d 1670
f7b6983f 1671#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1672static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1673{
428ae7ed
ED		 1674 struct xfrm_userpolicy_type upt;
1675
1676 /* Sadly there are two holes in struct xfrm_userpolicy_type */
1677 memset(&upt, 0, sizeof(upt));
1678 upt.type = type;
f7b6983f 1679
c0144bea 1680 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1681}
1682
1683#else
b798a9ed 1684static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1685{
1686 return 0;
1687}
1688#endif
1689
1da177e4
LT		 1690static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1691{
1692 struct xfrm_dump_info *sp = ptr;
1693 struct xfrm_userpolicy_info *p;
1694 struct sk_buff *in_skb = sp->in_skb;
1695 struct sk_buff *skb = sp->out_skb;
1696 struct nlmsghdr *nlh;
1d1e34dd 1697 int err;
1da177e4 1698
15e47304 1699 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1700 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1701 if (nlh == NULL)
1702 return -EMSGSIZE;
1da177e4 1703
7b67c857 1704 p = nlmsg_data(nlh);
1da177e4 1705 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1706 err = copy_to_user_tmpl(xp, skb);
1707 if (!err)
1708 err = copy_to_user_sec_ctx(xp, skb);
1709 if (!err)
1710 err = copy_to_user_policy_type(xp->type, skb);
1711 if (!err)
1712 err = xfrm_mark_put(skb, &xp->mark);
1713 if (err) {
1714 nlmsg_cancel(skb, nlh);
1715 return err;
1716 }
9825069d 1717 nlmsg_end(skb, nlh);
1da177e4 1718 return 0;
1da177e4
LT		 1719}
1720
4c563f76
TT		 1721static int xfrm_dump_policy_done(struct netlink_callback *cb)
1722{
1137b5e2 1723 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
283bc9f3 1724 struct net *net = sock_net(cb->skb->sk);
4c563f76 1725
283bc9f3 1726 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1727 return 0;
1728}
1729
1137b5e2
HX		 1730static int xfrm_dump_policy_start(struct netlink_callback *cb)
1731{
1732 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1733
1734 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1735
1736 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1737 return 0;
1738}
1739
1da177e4
LT		 1740static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1741{
fc34acd3 1742 struct net *net = sock_net(skb->sk);
1137b5e2 1743 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1da177e4
LT		 1744 struct xfrm_dump_info info;
1745
1746 info.in_skb = cb->skb;
1747 info.out_skb = skb;
1748 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1749 info.nlmsg_flags = NLM_F_MULTI;
4c563f76 1750
fc34acd3 1751 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1752
1753 return skb->len;
1754}
1755
1756static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1757 struct xfrm_policy *xp,
1758 int dir, u32 seq)
1759{
1760 struct xfrm_dump_info info;
1761 struct sk_buff *skb;
c2546372 1762 int err;
1da177e4 1763
7deb2264 1764 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1765 if (!skb)
1766 return ERR_PTR(-ENOMEM);
1767
1da177e4
LT		 1768 info.in_skb = in_skb;
1769 info.out_skb = skb;
1770 info.nlmsg_seq = seq;
1771 info.nlmsg_flags = 0;
1da177e4 1772
c2546372
MK		 1773 err = dump_one_policy(xp, dir, 0, &info);
1774 if (err) {
1da177e4 1775 kfree_skb(skb);
c2546372 1776 return ERR_PTR(err);
1da177e4
LT		 1777 }
1778
1779 return skb;
1780}
1781
22e70050 1782static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1783 struct nlattr **attrs)
1da177e4 1784{
fc34acd3 1785 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1786 struct xfrm_policy *xp;
1787 struct xfrm_userpolicy_id *p;
b798a9ed 1788 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1789 int err;
26b15dad 1790 struct km_event c;
1da177e4 1791 int delete;
295fae56
JHS		 1792 struct xfrm_mark m;
1793 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1794
7b67c857 1795 p = nlmsg_data(nlh);
1da177e4
LT		 1796 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1797
35a7aa08 1798 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1799 if (err)
1800 return err;
1801
1da177e4
LT		 1802 err = verify_policy_dir(p->dir);
1803 if (err)
1804 return err;
1805
1806 if (p->index)
295fae56 1807 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1808 else {
5424f32e 1809 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1810 struct xfrm_sec_ctx *ctx;
df71837d 1811
35a7aa08 1812 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1813 if (err)
1814 return err;
1815
2c8dd116 1816 ctx = NULL;
df71837d 1817 if (rt) {
5424f32e 1818 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1819
52a4c640 1820 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1821 if (err)
df71837d 1822 return err;
2c8dd116 1823 }
295fae56 1824 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1825 ctx, delete, &err);
03e1ad7b 1826 security_xfrm_policy_free(ctx);
df71837d 1827 }
1da177e4
LT		 1828 if (xp == NULL)
1829 return -ENOENT;
1830
1831 if (!delete) {
1832 struct sk_buff *resp_skb;
1833
1834 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1835 if (IS_ERR(resp_skb)) {
1836 err = PTR_ERR(resp_skb);
1837 } else {
a6483b79 1838 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1839 NETLINK_CB(skb).portid);
1da177e4 1840 }
26b15dad 1841 } else {
2e71029e 1842 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 1843
1844 if (err != 0)
c8c05a8e 1845 goto out;
13fcfbb0 1846
e7443892 1847 c.data.byid = p->index;
f60f6b8f 1848 c.event = nlh->nlmsg_type;
26b15dad 1849 c.seq = nlh->nlmsg_seq;
15e47304 1850 c.portid = nlh->nlmsg_pid;
26b15dad 1851 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1852 }
1853
c8c05a8e 1854out:
ef41aaa0 1855 xfrm_pol_put(xp);
1da177e4
LT		 1856 return err;
1857}
1858
22e70050 1859static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1860 struct nlattr **attrs)
1da177e4 1861{
fc34acd3 1862 struct net *net = sock_net(skb->sk);
26b15dad 1863 struct km_event c;
7b67c857 1864 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
4aa2e62c 1865 int err;
1da177e4 1866
2e71029e 1867 err = xfrm_state_flush(net, p->proto, true);
9e64cc95
JHS		 1868 if (err) {
1869 if (err == -ESRCH) /* empty table */
1870 return 0;
069c474e 1871 return err;
9e64cc95 1872 }
bf08867f 1873 c.data.proto = p->proto;
f60f6b8f 1874 c.event = nlh->nlmsg_type;
26b15dad 1875 c.seq = nlh->nlmsg_seq;
15e47304 1876 c.portid = nlh->nlmsg_pid;
7067802e 1877 c.net = net;
26b15dad
JHS		 1878 km_state_notify(NULL, &c);
1879
1da177e4
LT		 1880 return 0;
1881}
1882
a1b831f2 1883static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1884{
a1b831f2 1885 unsigned int replay_size = x->replay_esn ?
d8647b79
SK		 1886 xfrm_replay_state_esn_len(x->replay_esn) :
1887 sizeof(struct xfrm_replay_state);
1888
7deb2264 1889 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1890 + nla_total_size(replay_size)
de95c4a4 1891 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1892 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1893 + nla_total_size(4) /* XFRM_AE_RTHR */
1894 + nla_total_size(4); /* XFRM_AE_ETHR */
1895}
d51d081d 1896
214e005b 1897static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1898{
1899 struct xfrm_aevent_id *id;
1900 struct nlmsghdr *nlh;
1d1e34dd 1901 int err;
d51d081d 1902
15e47304 1903 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1904 if (nlh == NULL)
1905 return -EMSGSIZE;
d51d081d 1906
7b67c857 1907 id = nlmsg_data(nlh);
931e79d7 1908 memset(&id->sa_id, 0, sizeof(id->sa_id));
9b7a787d 1909 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1910 id->sa_id.spi = x->id.spi;
1911 id->sa_id.family = x->props.family;
1912 id->sa_id.proto = x->id.proto;
9b7a787d 1913 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1914 id->reqid = x->props.reqid;
d51d081d
JHS		 1915 id->flags = c->data.aevent;
1916
d0fde795 1917 if (x->replay_esn) {
1d1e34dd
DM		 1918 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1919 xfrm_replay_state_esn_len(x->replay_esn),
1920 x->replay_esn);
d0fde795 1921 } else {
1d1e34dd
DM		 1922 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1923 &x->replay);
d0fde795 1924 }
1d1e34dd
DM		 1925 if (err)
1926 goto out_cancel;
de95c4a4
ND		 1927 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
1928 XFRMA_PAD);
1d1e34dd
DM		 1929 if (err)
1930 goto out_cancel;
d51d081d 1931
1d1e34dd
DM		 1932 if (id->flags & XFRM_AE_RTHR) {
1933 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1934 if (err)
1935 goto out_cancel;
1936 }
1937 if (id->flags & XFRM_AE_ETHR) {
1938 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1939 x->replay_maxage * 10 / HZ);
1940 if (err)
1941 goto out_cancel;
1942 }
1943 err = xfrm_mark_put(skb, &x->mark);
1944 if (err)
1945 goto out_cancel;
6f26b61e 1946
053c095a
JB		 1947 nlmsg_end(skb, nlh);
1948 return 0;
d51d081d 1949
1d1e34dd 1950out_cancel:
9825069d 1951 nlmsg_cancel(skb, nlh);
1d1e34dd 1952 return err;
d51d081d
JHS		 1953}
1954
22e70050 1955static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1956 struct nlattr **attrs)
d51d081d 1957{
fc34acd3 1958 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1959 struct xfrm_state *x;
1960 struct sk_buff *r_skb;
1961 int err;
1962 struct km_event c;
6f26b61e
JHS		 1963 u32 mark;
1964 struct xfrm_mark m;
7b67c857 1965 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1966 struct xfrm_usersa_id *id = &p->sa_id;
1967
6f26b61e
JHS		 1968 mark = xfrm_mark_get(attrs, &m);
1969
1970 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1971 if (x == NULL)
d51d081d 1972 return -ESRCH;
d8647b79
SK		 1973
1974 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1975 if (r_skb == NULL) {
1976 xfrm_state_put(x);
1977 return -ENOMEM;
d51d081d
JHS		 1978 }
1979
1980 /*
1981 * XXX: is this lock really needed - none of the other
1982 * gets lock (the concern is things getting updated
1983 * while we are still reading) - jhs
1984 */
1985 spin_lock_bh(&x->lock);
1986 c.data.aevent = p->flags;
1987 c.seq = nlh->nlmsg_seq;
15e47304 1988 c.portid = nlh->nlmsg_pid;
d51d081d 1989
2fc5f83b
GS		 1990 err = build_aevent(r_skb, x, &c);
1991 BUG_ON(err < 0);
1992
15e47304 1993 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1994 spin_unlock_bh(&x->lock);
1995 xfrm_state_put(x);
1996 return err;
1997}
1998
22e70050 1999static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2000 struct nlattr **attrs)
d51d081d 2001{
fc34acd3 2002 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 2003 struct xfrm_state *x;
2004 struct km_event c;
02d0892f 2005 int err = -EINVAL;
6f26b61e
JHS		 2006 u32 mark = 0;
2007 struct xfrm_mark m;
7b67c857 2008 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 2009 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 2010 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 2011 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
4e077237
MR		 2012 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2013 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 2014
4e077237 2015 if (!lt && !rp && !re && !et && !rt)
d51d081d
JHS		 2016 return err;
2017
2018 /* pedantic mode - thou shalt sayeth replaceth */
2019 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
2020 return err;
2021
6f26b61e
JHS		 2022 mark = xfrm_mark_get(attrs, &m);
2023
2024 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 2025 if (x == NULL)
2026 return -ESRCH;
2027
2028 if (x->km.state != XFRM_STATE_VALID)
2029 goto out;
2030
4479ff76 2031 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 2032 if (err)
2033 goto out;
2034
d51d081d 2035 spin_lock_bh(&x->lock);
e3ac104d 2036 xfrm_update_ae_params(x, attrs, 1);
d51d081d 2037 spin_unlock_bh(&x->lock);
d51d081d
JHS		 2038
2039 c.event = nlh->nlmsg_type;
2040 c.seq = nlh->nlmsg_seq;
15e47304 2041 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 2042 c.data.aevent = XFRM_AE_CU;
2043 km_state_notify(x, &c);
2044 err = 0;
2045out:
2046 xfrm_state_put(x);
2047 return err;
2048}
2049
22e70050 2050static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2051 struct nlattr **attrs)
1da177e4 2052{
fc34acd3 2053 struct net *net = sock_net(skb->sk);
f7b6983f 2054 struct km_event c;
b798a9ed 2055 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 2056 int err;
2057
35a7aa08 2058 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2059 if (err)
2060 return err;
26b15dad 2061
2e71029e 2062 err = xfrm_policy_flush(net, type, true);
2f1eb65f
JHS		 2063 if (err) {
2064 if (err == -ESRCH) /* empty table */
2065 return 0;
069c474e 2066 return err;
2f1eb65f
JHS		 2067 }
2068
f7b6983f 2069 c.data.type = type;
f60f6b8f 2070 c.event = nlh->nlmsg_type;
26b15dad 2071 c.seq = nlh->nlmsg_seq;
15e47304 2072 c.portid = nlh->nlmsg_pid;
7067802e 2073 c.net = net;
26b15dad 2074 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2075 return 0;
2076}
2077
22e70050 2078static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2079 struct nlattr **attrs)
6c5c8ca7 2080{
fc34acd3 2081 struct net *net = sock_net(skb->sk);
6c5c8ca7 2082 struct xfrm_policy *xp;
7b67c857 2083 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 2084 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 2085 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 2086 int err = -ENOENT;
295fae56
JHS		 2087 struct xfrm_mark m;
2088 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 2089
35a7aa08 2090 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2091 if (err)
2092 return err;
2093
c8bf4d04
TT		 2094 err = verify_policy_dir(p->dir);
2095 if (err)
2096 return err;
2097
6c5c8ca7 2098 if (p->index)
295fae56 2099 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 2100 else {
5424f32e 2101 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 2102 struct xfrm_sec_ctx *ctx;
6c5c8ca7 2103
35a7aa08 2104 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 2105 if (err)
2106 return err;
2107
2c8dd116 2108 ctx = NULL;
6c5c8ca7 2109 if (rt) {
5424f32e 2110 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 2111
52a4c640 2112 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 2113 if (err)
6c5c8ca7 2114 return err;
2c8dd116 2115 }
295fae56 2116 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 2117 &p->sel, ctx, 0, &err);
03e1ad7b 2118 security_xfrm_policy_free(ctx);
6c5c8ca7 2119 }
6c5c8ca7 2120 if (xp == NULL)
ef41aaa0 2121 return -ENOENT;
03e1ad7b 2122
ea2dea9d 2123 if (unlikely(xp->walk.dead))
6c5c8ca7 2124 goto out;
6c5c8ca7 2125
6c5c8ca7
JHS		 2126 err = 0;
2127 if (up->hard) {
2128 xfrm_policy_delete(xp, p->dir);
2e71029e 2129 xfrm_audit_policy_delete(xp, 1, true);
6c5c8ca7 2130 }
c6bb8136 2131 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 2132
2133out:
2134 xfrm_pol_put(xp);
2135 return err;
2136}
2137
22e70050 2138static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2139 struct nlattr **attrs)
53bc6b4d 2140{
fc34acd3 2141 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 2142 struct xfrm_state *x;
2143 int err;
7b67c857 2144 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 2145 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 2146 struct xfrm_mark m;
928497f0 2147 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 2148
6f26b61e 2149 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 2150
3a765aa5 2151 err = -ENOENT;
53bc6b4d
JHS		 2152 if (x == NULL)
2153 return err;
2154
53bc6b4d 2155 spin_lock_bh(&x->lock);
3a765aa5 2156 err = -EINVAL;
53bc6b4d
JHS		 2157 if (x->km.state != XFRM_STATE_VALID)
2158 goto out;
c6bb8136 2159 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 2160
161a09e7 2161 if (ue->hard) {
53bc6b4d 2162 __xfrm_state_delete(x);
2e71029e 2163 xfrm_audit_state_delete(x, 1, true);
161a09e7 2164 }
3a765aa5 2165 err = 0;
53bc6b4d
JHS		 2166out:
2167 spin_unlock_bh(&x->lock);
2168 xfrm_state_put(x);
2169 return err;
2170}
2171
22e70050 2172static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2173 struct nlattr **attrs)
980ebd25 2174{
fc34acd3 2175 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2176 struct xfrm_policy *xp;
2177 struct xfrm_user_tmpl *ut;
2178 int i;
5424f32e 2179 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2180 struct xfrm_mark mark;
980ebd25 2181
7b67c857 2182 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2183 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2184 int err = -ENOMEM;
2185
2186 if (!x)
d8eb9307 2187 goto nomem;
980ebd25 2188
6f26b61e
JHS		 2189 xfrm_mark_get(attrs, &mark);
2190
980ebd25 2191 err = verify_newpolicy_info(&ua->policy);
d8eb9307 2192 if (err)
73efc324 2193 goto free_state;
980ebd25
JHS		 2194
2195 /* build an XP */
fc34acd3 2196 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2197 if (!xp)
2198 goto free_state;
980ebd25
JHS		 2199
2200 memcpy(&x->id, &ua->id, sizeof(ua->id));
2201 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2202 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2203 xp->mark.m = x->mark.m = mark.m;
2204 xp->mark.v = x->mark.v = mark.v;
5424f32e 2205 ut = nla_data(rt);
980ebd25
JHS		 2206 /* extract the templates and for each call km_key */
2207 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2208 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2209 memcpy(&x->id, &t->id, sizeof(x->id));
2210 x->props.mode = t->mode;
2211 x->props.reqid = t->reqid;
2212 x->props.family = ut->family;
2213 t->aalgos = ua->aalgos;
2214 t->ealgos = ua->ealgos;
2215 t->calgos = ua->calgos;
2216 err = km_query(x, t, xp);
2217
2218 }
2219
2220 kfree(x);
2221 kfree(xp);
2222
2223 return 0;
d8eb9307 2224
d8eb9307
IJ		 2225free_state:
2226 kfree(x);
2227nomem:
2228 return err;
980ebd25
JHS		 2229}
2230
5c79de6e 2231#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2232static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2233 struct xfrm_kmaddress *k,
5424f32e 2234 struct nlattr **attrs, int *num)
5c79de6e 2235{
5424f32e 2236 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2237 struct xfrm_user_migrate *um;
2238 int i, num_migrate;
2239
13c1d189
AE		 2240 if (k != NULL) {
2241 struct xfrm_user_kmaddress *uk;
2242
2243 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2244 memcpy(&k->local, &uk->local, sizeof(k->local));
2245 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2246 k->family = uk->family;
2247 k->reserved = uk->reserved;
2248 }
2249
5424f32e
TG		 2250 um = nla_data(rt);
2251 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2252
2253 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2254 return -EINVAL;
2255
2256 for (i = 0; i < num_migrate; i++, um++, ma++) {
2257 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2258 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2259 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2260 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2261
2262 ma->proto = um->proto;
2263 ma->mode = um->mode;
2264 ma->reqid = um->reqid;
2265
2266 ma->old_family = um->old_family;
2267 ma->new_family = um->new_family;
2268 }
2269
2270 *num = i;
2271 return 0;
2272}
2273
2274static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2275 struct nlattr **attrs)
5c79de6e 2276{
7b67c857 2277 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2278 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2279 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2280 u8 type;
2281 int err;
2282 int n = 0;
8d549c4f 2283 struct net *net = sock_net(skb->sk);
4ab47d47 2284 struct xfrm_encap_tmpl *encap = NULL;
5c79de6e 2285
35a7aa08 2286 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2287 return -EINVAL;
5c79de6e 2288
13c1d189
AE		 2289 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2290
5424f32e 2291 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2292 if (err)
2293 return err;
2294
13c1d189 2295 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2296 if (err)
2297 return err;
2298
2299 if (!n)
2300 return 0;
2301
4ab47d47
AA		 2302 if (attrs[XFRMA_ENCAP]) {
2303 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2304 sizeof(*encap), GFP_KERNEL);
2305 if (!encap)
2306 return 0;
2307 }
5c79de6e 2308
4ab47d47
AA		 2309 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2310
2311 kfree(encap);
2312
2313 return err;
5c79de6e
SS		 2314}
2315#else
2316static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2317 struct nlattr **attrs)
5c79de6e
SS		 2318{
2319 return -ENOPROTOOPT;
2320}
2321#endif
2322
2323#ifdef CONFIG_XFRM_MIGRATE
183cad12 2324static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2325{
2326 struct xfrm_user_migrate um;
2327
2328 memset(&um, 0, sizeof(um));
2329 um.proto = m->proto;
2330 um.mode = m->mode;
2331 um.reqid = m->reqid;
2332 um.old_family = m->old_family;
2333 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2334 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2335 um.new_family = m->new_family;
2336 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2337 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2338
c0144bea 2339 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2340}
2341
183cad12 2342static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2343{
2344 struct xfrm_user_kmaddress uk;
2345
2346 memset(&uk, 0, sizeof(uk));
2347 uk.family = k->family;
2348 uk.reserved = k->reserved;
2349 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2350 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2351
2352 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2353}
2354
a1b831f2
AD		 2355static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2356 int with_encp)
7deb2264
TG		 2357{
2358 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189 2359 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
8bafd730 2360 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
13c1d189
AE		 2361 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2362 + userpolicy_type_attrsize();
7deb2264
TG		 2363}
2364
183cad12
DM		 2365static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2366 int num_migrate, const struct xfrm_kmaddress *k,
8bafd730
AA		 2367 const struct xfrm_selector *sel,
2368 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
5c79de6e 2369{
183cad12 2370 const struct xfrm_migrate *mp;
5c79de6e
SS		 2371 struct xfrm_userpolicy_id *pol_id;
2372 struct nlmsghdr *nlh;
1d1e34dd 2373 int i, err;
5c79de6e 2374
79b8b7f4
TG		 2375 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2376 if (nlh == NULL)
2377 return -EMSGSIZE;
5c79de6e 2378
7b67c857 2379 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2380 /* copy data from selector, dir, and type to the pol_id */
2381 memset(pol_id, 0, sizeof(*pol_id));
2382 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2383 pol_id->dir = dir;
2384
1d1e34dd
DM		 2385 if (k != NULL) {
2386 err = copy_to_user_kmaddress(k, skb);
2387 if (err)
2388 goto out_cancel;
2389 }
8bafd730
AA		 2390 if (encap) {
2391 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2392 if (err)
2393 goto out_cancel;
2394 }
1d1e34dd
DM		 2395 err = copy_to_user_policy_type(type, skb);
2396 if (err)
2397 goto out_cancel;
5c79de6e 2398 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2399 err = copy_to_user_migrate(mp, skb);
2400 if (err)
2401 goto out_cancel;
5c79de6e
SS		 2402 }
2403
053c095a
JB		 2404 nlmsg_end(skb, nlh);
2405 return 0;
1d1e34dd
DM		 2406
2407out_cancel:
9825069d 2408 nlmsg_cancel(skb, nlh);
1d1e34dd 2409 return err;
5c79de6e
SS		 2410}
2411
183cad12
DM		 2412static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2413 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2414 const struct xfrm_kmaddress *k,
2415 const struct xfrm_encap_tmpl *encap)
5c79de6e 2416{
a6483b79 2417 struct net *net = &init_net;
5c79de6e 2418 struct sk_buff *skb;
2fc5f83b 2419 int err;
5c79de6e 2420
8bafd730
AA		 2421 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2422 GFP_ATOMIC);
5c79de6e
SS		 2423 if (skb == NULL)
2424 return -ENOMEM;
2425
2426 /* build migrate */
2fc5f83b
GS		 2427 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2428 BUG_ON(err < 0);
5c79de6e 2429
21ee543e 2430 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
5c79de6e
SS		 2431}
2432#else
183cad12
DM		 2433static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2434 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2435 const struct xfrm_kmaddress *k,
2436 const struct xfrm_encap_tmpl *encap)
5c79de6e
SS		 2437{
2438 return -ENOPROTOOPT;
2439}
2440#endif
d51d081d 2441
a7bd9a45 2442#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2443
2444static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2445 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2446 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2447 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2448 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2449 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2450 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2451 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2452 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2453 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2454 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2455 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2456 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2457 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2458 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2459 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2460 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2461 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2462 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45 2463 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
880a6fab 2464 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
a7bd9a45 2465 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2466};
2467
492b558b
TG		 2468#undef XMSGSIZE
2469
cf5cb79f 2470static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2471 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2472 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2473 [XFRMA_LASTUSED] = { .type = NLA_U64},
2474 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2475 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2476 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2477 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2478 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2479 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2480 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2481 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2482 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2483 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2484 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2485 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2486 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2487 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2488 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2489 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2490 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2491 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2492 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2493 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2494 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
d3623099 2495 [XFRMA_PROTO] = { .type = NLA_U8 },
870a2df4 2496 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
d77e38e6 2497 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
e7191358 2498 [XFRMA_OUTPUT_MARK] = { .type = NLA_U32 },
cf5cb79f
TG		 2499};
2500
880a6fab
CG		 2501static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2502 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2503 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2504};
2505
05600a79 2506static const struct xfrm_link {
5424f32e 2507 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1137b5e2 2508 int (*start)(struct netlink_callback *);
1da177e4 2509 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2510 int (*done)(struct netlink_callback *);
880a6fab
CG		 2511 const struct nla_policy *nla_pol;
2512 int nla_max;
492b558b
TG		 2513} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2514 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2515 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2516 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2517 .dump = xfrm_dump_sa,
2518 .done = xfrm_dump_sa_done },
492b558b
TG		 2519 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2520 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2521 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1137b5e2 2522 .start = xfrm_dump_policy_start,
4c563f76
TT		 2523 .dump = xfrm_dump_policy,
2524 .done = xfrm_dump_policy_done },
492b558b 2525 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2526 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2527 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2528 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2529 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2530 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2531 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2532 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2533 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2534 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2535 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2536 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
880a6fab
CG		 2537 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2538 .nla_pol = xfrma_spd_policy,
2539 .nla_max = XFRMA_SPD_MAX },
ecfd6b18 2540 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2541};
2542
2d4bc933
JB		 2543static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2544 struct netlink_ext_ack *extack)
1da177e4 2545{
a6483b79 2546 struct net *net = sock_net(skb->sk);
35a7aa08 2547 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2548 const struct xfrm_link *link;
a7bd9a45 2549 int type, err;
1da177e4 2550
74005991 2551#ifdef CONFIG_COMPAT
2bf8c476 2552 if (in_compat_syscall())
83e2d058 2553 return -EOPNOTSUPP;
74005991
FD		 2554#endif
2555
1da177e4 2556 type = nlh->nlmsg_type;
1da177e4 2557 if (type > XFRM_MSG_MAX)
1d00a4eb 2558 return -EINVAL;
1da177e4
LT		 2559
2560 type -= XFRM_MSG_BASE;
2561 link = &xfrm_dispatch[type];
2562
2563 /* All operations require privileges, even GET */
90f62cf3 2564 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 2565 return -EPERM;
1da177e4 2566
492b558b
TG		 2567 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2568 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2569 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2570 if (link->dump == NULL)
1d00a4eb 2571 return -EINVAL;
88fc2c84 2572
80d326fa
PNA		 2573 {
2574 struct netlink_dump_control c = {
1137b5e2 2575 .start = link->start,
80d326fa
PNA		 2576 .dump = link->dump,
2577 .done = link->done,
2578 };
2579 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2580 }
1da177e4
LT		 2581 }
2582
880a6fab
CG		 2583 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2584 link->nla_max ? : XFRMA_MAX,
fe52145f 2585 link->nla_pol ? : xfrma_policy, extack);
a7bd9a45
TG		 2586 if (err < 0)
2587 return err;
1da177e4
LT		 2588
2589 if (link->doit == NULL)
1d00a4eb 2590 return -EINVAL;
1da177e4 2591
5424f32e 2592 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2593}
2594
cd40b7d3 2595static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2596{
283bc9f3
FD		 2597 struct net *net = sock_net(skb->sk);
2598
2599 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2600 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2601 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2602}
2603
a1b831f2 2604static inline unsigned int xfrm_expire_msgsize(void)
7deb2264 2605{
6f26b61e
JHS		 2606 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2607 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2608}
2609
214e005b 2610static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2611{
2612 struct xfrm_user_expire *ue;
2613 struct nlmsghdr *nlh;
1d1e34dd 2614 int err;
1da177e4 2615
15e47304 2616 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2617 if (nlh == NULL)
2618 return -EMSGSIZE;
1da177e4 2619
7b67c857 2620 ue = nlmsg_data(nlh);
1da177e4 2621 copy_to_user_state(x, &ue->state);
d51d081d 2622 ue->hard = (c->data.hard != 0) ? 1 : 0;
e3e5fc16
MK		 2623 /* clear the padding bytes */
2624 memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));
1da177e4 2625
1d1e34dd
DM		 2626 err = xfrm_mark_put(skb, &x->mark);
2627 if (err)
2628 return err;
6f26b61e 2629
053c095a
JB		 2630 nlmsg_end(skb, nlh);
2631 return 0;
1da177e4
LT		 2632}
2633
214e005b 2634static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2635{
fc34acd3 2636 struct net *net = xs_net(x);
1da177e4
LT		 2637 struct sk_buff *skb;
2638
7deb2264 2639 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2640 if (skb == NULL)
2641 return -ENOMEM;
2642
6f26b61e
JHS		 2643 if (build_expire(skb, x, c) < 0) {
2644 kfree_skb(skb);
2645 return -EMSGSIZE;
2646 }
1da177e4 2647
21ee543e 2648 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2649}
2650
214e005b 2651static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2652{
fc34acd3 2653 struct net *net = xs_net(x);
d51d081d 2654 struct sk_buff *skb;
2fc5f83b 2655 int err;
d51d081d 2656
d8647b79 2657 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2658 if (skb == NULL)
2659 return -ENOMEM;
2660
2fc5f83b
GS		 2661 err = build_aevent(skb, x, c);
2662 BUG_ON(err < 0);
d51d081d 2663
21ee543e 2664 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
d51d081d
JHS		 2665}
2666
214e005b 2667static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2668{
7067802e 2669 struct net *net = c->net;
26b15dad
JHS		 2670 struct xfrm_usersa_flush *p;
2671 struct nlmsghdr *nlh;
2672 struct sk_buff *skb;
7deb2264 2673 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2674
7deb2264 2675 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2676 if (skb == NULL)
2677 return -ENOMEM;
26b15dad 2678
15e47304 2679 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2680 if (nlh == NULL) {
2681 kfree_skb(skb);
2682 return -EMSGSIZE;
2683 }
26b15dad 2684
7b67c857 2685 p = nlmsg_data(nlh);
bf08867f 2686 p->proto = c->data.proto;
26b15dad 2687
9825069d 2688 nlmsg_end(skb, nlh);
26b15dad 2689
21ee543e 2690 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad
JHS		 2691}
2692
a1b831f2 2693static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
26b15dad 2694{
a1b831f2 2695 unsigned int l = 0;
1a6509d9
HX		 2696 if (x->aead)
2697 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2698 if (x->aalg) {
2699 l += nla_total_size(sizeof(struct xfrm_algo) +
2700 (x->aalg->alg_key_len + 7) / 8);
2701 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2702 }
26b15dad 2703 if (x->ealg)
0f99be0d 2704 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2705 if (x->calg)
7deb2264 2706 l += nla_total_size(sizeof(*x->calg));
26b15dad 2707 if (x->encap)
7deb2264 2708 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2709 if (x->tfcpad)
2710 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2711 if (x->replay_esn)
2712 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
f293a5e3 2713 else
2714 l += nla_total_size(sizeof(struct xfrm_replay_state));
68325d3b
HX		 2715 if (x->security)
2716 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2717 x->security->ctx_len);
2718 if (x->coaddr)
2719 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2720 if (x->props.extra_flags)
2721 l += nla_total_size(sizeof(x->props.extra_flags));
d77e38e6
SK		 2722 if (x->xso.dev)
2723 l += nla_total_size(sizeof(x->xso));
077fbac4
LC		 2724 if (x->props.output_mark)
2725 l += nla_total_size(sizeof(x->props.output_mark));
68325d3b 2726
d26f3984 2727 /* Must count x->lastused as it may become non-zero behind our back. */
de95c4a4 2728 l += nla_total_size_64bit(sizeof(u64));
26b15dad
JHS		 2729
2730 return l;
2731}
2732
214e005b 2733static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2734{
fc34acd3 2735 struct net *net = xs_net(x);
26b15dad 2736 struct xfrm_usersa_info *p;
0603eac0 2737 struct xfrm_usersa_id *id;
26b15dad
JHS		 2738 struct nlmsghdr *nlh;
2739 struct sk_buff *skb;
a1b831f2
AD		 2740 unsigned int len = xfrm_sa_len(x);
2741 unsigned int headlen;
2742 int err;
0603eac0
HX		 2743
2744 headlen = sizeof(*p);
2745 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2746 len += nla_total_size(headlen);
0603eac0 2747 headlen = sizeof(*id);
6f26b61e 2748 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2749 }
7deb2264 2750 len += NLMSG_ALIGN(headlen);
26b15dad 2751
7deb2264 2752 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2753 if (skb == NULL)
2754 return -ENOMEM;
26b15dad 2755
15e47304 2756 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2757 err = -EMSGSIZE;
79b8b7f4 2758 if (nlh == NULL)
1d1e34dd 2759 goto out_free_skb;
26b15dad 2760
7b67c857 2761 p = nlmsg_data(nlh);
0603eac0 2762 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2763 struct nlattr *attr;
2764
7b67c857 2765 id = nlmsg_data(nlh);
50329c8a 2766 memset(id, 0, sizeof(*id));
0603eac0
HX		 2767 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2768 id->spi = x->id.spi;
2769 id->family = x->props.family;
2770 id->proto = x->id.proto;
2771
c0144bea 2772 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2773 err = -EMSGSIZE;
c0144bea 2774 if (attr == NULL)
1d1e34dd 2775 goto out_free_skb;
c0144bea
TG		 2776
2777 p = nla_data(attr);
0603eac0 2778 }
1d1e34dd
DM		 2779 err = copy_to_user_state_extra(x, p, skb);
2780 if (err)
2781 goto out_free_skb;
26b15dad 2782
9825069d 2783 nlmsg_end(skb, nlh);
26b15dad 2784
21ee543e 2785 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad 2786
1d1e34dd 2787out_free_skb:
26b15dad 2788 kfree_skb(skb);
1d1e34dd 2789 return err;
26b15dad
JHS		 2790}
2791
214e005b 2792static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2793{
2794
2795 switch (c->event) {
f60f6b8f 2796 case XFRM_MSG_EXPIRE:
26b15dad 2797 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2798 case XFRM_MSG_NEWAE:
2799 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2800 case XFRM_MSG_DELSA:
2801 case XFRM_MSG_UPDSA:
2802 case XFRM_MSG_NEWSA:
26b15dad 2803 return xfrm_notify_sa(x, c);
f60f6b8f 2804 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2805 return xfrm_notify_sa_flush(c);
2806 default:
62db5cfd 2807 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2808 c->event);
2809 break;
26b15dad
JHS		 2810 }
2811
2812 return 0;
2813
2814}
2815
a1b831f2
AD		 2816static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
2817 struct xfrm_policy *xp)
7deb2264
TG		 2818{
2819 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2820 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2821 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2822 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2823 + userpolicy_type_attrsize();
2824}
2825
1da177e4 2826static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2827 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2828{
1d1e34dd 2829 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2830 struct xfrm_user_acquire *ua;
2831 struct nlmsghdr *nlh;
1d1e34dd 2832 int err;
1da177e4 2833
79b8b7f4
TG		 2834 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2835 if (nlh == NULL)
2836 return -EMSGSIZE;
1da177e4 2837
7b67c857 2838 ua = nlmsg_data(nlh);
1da177e4
LT		 2839 memcpy(&ua->id, &x->id, sizeof(ua->id));
2840 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2841 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2842 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2843 ua->aalgos = xt->aalgos;
2844 ua->ealgos = xt->ealgos;
2845 ua->calgos = xt->calgos;
2846 ua->seq = x->km.seq = seq;
2847
1d1e34dd
DM		 2848 err = copy_to_user_tmpl(xp, skb);
2849 if (!err)
2850 err = copy_to_user_state_sec_ctx(x, skb);
2851 if (!err)
2852 err = copy_to_user_policy_type(xp->type, skb);
2853 if (!err)
2854 err = xfrm_mark_put(skb, &xp->mark);
2855 if (err) {
2856 nlmsg_cancel(skb, nlh);
2857 return err;
2858 }
1da177e4 2859
053c095a
JB		 2860 nlmsg_end(skb, nlh);
2861 return 0;
1da177e4
LT		 2862}
2863
2864static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2865 struct xfrm_policy *xp)
1da177e4 2866{
a6483b79 2867 struct net *net = xs_net(x);
1da177e4 2868 struct sk_buff *skb;
2fc5f83b 2869 int err;
1da177e4 2870
7deb2264 2871 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2872 if (skb == NULL)
2873 return -ENOMEM;
2874
2fc5f83b
GS		 2875 err = build_acquire(skb, x, xt, xp);
2876 BUG_ON(err < 0);
1da177e4 2877
21ee543e 2878 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
1da177e4
LT		 2879}
2880
2881/* User gives us xfrm_user_policy_info followed by an array of 0
2882 * or more templates.
2883 */
cb969f07 2884static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2885 u8 *data, int len, int *dir)
2886{
fc34acd3 2887 struct net *net = sock_net(sk);
1da177e4
LT		 2888 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2889 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2890 struct xfrm_policy *xp;
2891 int nr;
2892
cb969f07 2893 switch (sk->sk_family) {
1da177e4
LT		 2894 case AF_INET:
2895 if (opt != IP_XFRM_POLICY) {
2896 *dir = -EOPNOTSUPP;
2897 return NULL;
2898 }
2899 break;
dfd56b8b 2900#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2901 case AF_INET6:
2902 if (opt != IPV6_XFRM_POLICY) {
2903 *dir = -EOPNOTSUPP;
2904 return NULL;
2905 }
2906 break;
2907#endif
2908 default:
2909 *dir = -EINVAL;
2910 return NULL;
2911 }
2912
2913 *dir = -EINVAL;
2914
2915 if (len < sizeof(*p) ||
2916 verify_newpolicy_info(p))
2917 return NULL;
2918
2919 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2920 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2921 return NULL;
2922
a4f1bac6
HX		 2923 if (p->dir > XFRM_POLICY_OUT)
2924 return NULL;
2925
2f09a4d5 2926 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2927 if (xp == NULL) {
2928 *dir = -ENOBUFS;
2929 return NULL;
2930 }
2931
2932 copy_from_user_policy(xp, p);
f7b6983f 2933 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2934 copy_templates(xp, ut, nr);
2935
2936 *dir = p->dir;
2937
2938 return xp;
2939}
2940
a1b831f2 2941static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
7deb2264
TG		 2942{
2943 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2944 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2945 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2946 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2947 + userpolicy_type_attrsize();
2948}
2949
1da177e4 2950static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2951 int dir, const struct km_event *c)
1da177e4
LT		 2952{
2953 struct xfrm_user_polexpire *upe;
d51d081d 2954 int hard = c->data.hard;
1d1e34dd
DM		 2955 struct nlmsghdr *nlh;
2956 int err;
1da177e4 2957
15e47304 2958 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2959 if (nlh == NULL)
2960 return -EMSGSIZE;
1da177e4 2961
7b67c857 2962 upe = nlmsg_data(nlh);
1da177e4 2963 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2964 err = copy_to_user_tmpl(xp, skb);
2965 if (!err)
2966 err = copy_to_user_sec_ctx(xp, skb);
2967 if (!err)
2968 err = copy_to_user_policy_type(xp->type, skb);
2969 if (!err)
2970 err = xfrm_mark_put(skb, &xp->mark);
2971 if (err) {
2972 nlmsg_cancel(skb, nlh);
2973 return err;
2974 }
1da177e4
LT		 2975 upe->hard = !!hard;
2976
053c095a
JB		 2977 nlmsg_end(skb, nlh);
2978 return 0;
1da177e4
LT		 2979}
2980
214e005b 2981static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2982{
fc34acd3 2983 struct net *net = xp_net(xp);
1da177e4 2984 struct sk_buff *skb;
2fc5f83b 2985 int err;
1da177e4 2986
7deb2264 2987 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2988 if (skb == NULL)
2989 return -ENOMEM;
2990
2fc5f83b
GS		 2991 err = build_polexpire(skb, xp, dir, c);
2992 BUG_ON(err < 0);
1da177e4 2993
21ee543e 2994 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2995}
2996
214e005b 2997static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2998{
a1b831f2 2999 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 3000 struct net *net = xp_net(xp);
26b15dad 3001 struct xfrm_userpolicy_info *p;
0603eac0 3002 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 3003 struct nlmsghdr *nlh;
3004 struct sk_buff *skb;
a1b831f2
AD		 3005 unsigned int headlen;
3006 int err;
0603eac0
HX		 3007
3008 headlen = sizeof(*p);
3009 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 3010 len += nla_total_size(headlen);
0603eac0
HX		 3011 headlen = sizeof(*id);
3012 }
cfbfd45a 3013 len += userpolicy_type_attrsize();
295fae56 3014 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 3015 len += NLMSG_ALIGN(headlen);
26b15dad 3016
7deb2264 3017 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 3018 if (skb == NULL)
3019 return -ENOMEM;
26b15dad 3020
15e47304 3021 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 3022 err = -EMSGSIZE;
79b8b7f4 3023 if (nlh == NULL)
1d1e34dd 3024 goto out_free_skb;
26b15dad 3025
7b67c857 3026 p = nlmsg_data(nlh);
0603eac0 3027 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 3028 struct nlattr *attr;
3029
7b67c857 3030 id = nlmsg_data(nlh);
0603eac0
HX		 3031 memset(id, 0, sizeof(*id));
3032 id->dir = dir;
3033 if (c->data.byid)
3034 id->index = xp->index;
3035 else
3036 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3037
c0144bea 3038 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 3039 err = -EMSGSIZE;
c0144bea 3040 if (attr == NULL)
1d1e34dd 3041 goto out_free_skb;
c0144bea
TG		 3042
3043 p = nla_data(attr);
0603eac0 3044 }
26b15dad 3045
26b15dad 3046 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 3047 err = copy_to_user_tmpl(xp, skb);
3048 if (!err)
3049 err = copy_to_user_policy_type(xp->type, skb);
3050 if (!err)
3051 err = xfrm_mark_put(skb, &xp->mark);
3052 if (err)
3053 goto out_free_skb;
295fae56 3054
9825069d 3055 nlmsg_end(skb, nlh);
26b15dad 3056
21ee543e 3057 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3058
1d1e34dd 3059out_free_skb:
26b15dad 3060 kfree_skb(skb);
1d1e34dd 3061 return err;
26b15dad
JHS		 3062}
3063
214e005b 3064static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 3065{
7067802e 3066 struct net *net = c->net;
26b15dad
JHS		 3067 struct nlmsghdr *nlh;
3068 struct sk_buff *skb;
1d1e34dd 3069 int err;
26b15dad 3070
7deb2264 3071 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 3072 if (skb == NULL)
3073 return -ENOMEM;
26b15dad 3074
15e47304 3075 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 3076 err = -EMSGSIZE;
79b8b7f4 3077 if (nlh == NULL)
1d1e34dd
DM		 3078 goto out_free_skb;
3079 err = copy_to_user_policy_type(c->data.type, skb);
3080 if (err)
3081 goto out_free_skb;
26b15dad 3082
9825069d 3083 nlmsg_end(skb, nlh);
26b15dad 3084
21ee543e 3085 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3086
1d1e34dd 3087out_free_skb:
26b15dad 3088 kfree_skb(skb);
1d1e34dd 3089 return err;
26b15dad
JHS		 3090}
3091
214e005b 3092static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 3093{
3094
3095 switch (c->event) {
f60f6b8f
HX		 3096 case XFRM_MSG_NEWPOLICY:
3097 case XFRM_MSG_UPDPOLICY:
3098 case XFRM_MSG_DELPOLICY:
26b15dad 3099 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 3100 case XFRM_MSG_FLUSHPOLICY:
26b15dad 3101 return xfrm_notify_policy_flush(c);
f60f6b8f 3102 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 3103 return xfrm_exp_policy_notify(xp, dir, c);
3104 default:
62db5cfd 3105 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3106 c->event);
26b15dad
JHS		 3107 }
3108
3109 return 0;
3110
3111}
3112
a1b831f2 3113static inline unsigned int xfrm_report_msgsize(void)
7deb2264
TG		 3114{
3115 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3116}
3117
97a64b45
MN		 3118static int build_report(struct sk_buff *skb, u8 proto,
3119 struct xfrm_selector *sel, xfrm_address_t *addr)
3120{
3121 struct xfrm_user_report *ur;
3122 struct nlmsghdr *nlh;
97a64b45 3123
79b8b7f4
TG		 3124 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3125 if (nlh == NULL)
3126 return -EMSGSIZE;
97a64b45 3127
7b67c857 3128 ur = nlmsg_data(nlh);
97a64b45
MN		 3129 ur->proto = proto;
3130 memcpy(&ur->sel, sel, sizeof(ur->sel));
3131
1d1e34dd
DM		 3132 if (addr) {
3133 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3134 if (err) {
3135 nlmsg_cancel(skb, nlh);
3136 return err;
3137 }
3138 }
053c095a
JB		 3139 nlmsg_end(skb, nlh);
3140 return 0;
97a64b45
MN		 3141}
3142
db983c11
AD		 3143static int xfrm_send_report(struct net *net, u8 proto,
3144 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 3145{
3146 struct sk_buff *skb;
2fc5f83b 3147 int err;
97a64b45 3148
7deb2264 3149 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 3150 if (skb == NULL)
3151 return -ENOMEM;
3152
2fc5f83b
GS		 3153 err = build_report(skb, proto, sel, addr);
3154 BUG_ON(err < 0);
97a64b45 3155
21ee543e 3156 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
97a64b45
MN		 3157}
3158
a1b831f2 3159static inline unsigned int xfrm_mapping_msgsize(void)
3a2dfbe8
MW		 3160{
3161 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3162}
3163
3164static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3165 xfrm_address_t *new_saddr, __be16 new_sport)
3166{
3167 struct xfrm_user_mapping *um;
3168 struct nlmsghdr *nlh;
3169
3170 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3171 if (nlh == NULL)
3172 return -EMSGSIZE;
3173
3174 um = nlmsg_data(nlh);
3175
3176 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3177 um->id.spi = x->id.spi;
3178 um->id.family = x->props.family;
3179 um->id.proto = x->id.proto;
3180 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3181 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3182 um->new_sport = new_sport;
3183 um->old_sport = x->encap->encap_sport;
3184 um->reqid = x->props.reqid;
3185
053c095a
JB		 3186 nlmsg_end(skb, nlh);
3187 return 0;
3a2dfbe8
MW		 3188}
3189
3190static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3191 __be16 sport)
3192{
a6483b79 3193 struct net *net = xs_net(x);
3a2dfbe8 3194 struct sk_buff *skb;
2fc5f83b 3195 int err;
3a2dfbe8
MW		 3196
3197 if (x->id.proto != IPPROTO_ESP)
3198 return -EINVAL;
3199
3200 if (!x->encap)
3201 return -EINVAL;
3202
3203 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3204 if (skb == NULL)
3205 return -ENOMEM;
3206
2fc5f83b
GS		 3207 err = build_mapping(skb, x, ipaddr, sport);
3208 BUG_ON(err < 0);
3a2dfbe8 3209
21ee543e 3210 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3a2dfbe8
MW		 3211}
3212
0f24558e
HG		 3213static bool xfrm_is_alive(const struct km_event *c)
3214{
3215 return (bool)xfrm_acquire_is_on(c->net);
3216}
3217
1da177e4 3218static struct xfrm_mgr netlink_mgr = {
1da177e4
LT		 3219 .notify = xfrm_send_state_notify,
3220 .acquire = xfrm_send_acquire,
3221 .compile_policy = xfrm_compile_policy,
3222 .notify_policy = xfrm_send_policy_notify,
97a64b45 3223 .report = xfrm_send_report,
5c79de6e 3224 .migrate = xfrm_send_migrate,
3a2dfbe8 3225 .new_mapping = xfrm_send_mapping,
0f24558e 3226 .is_alive = xfrm_is_alive,
1da177e4
LT		 3227};
3228
a6483b79 3229static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 3230{
be33690d 3231 struct sock *nlsk;
a31f2d17
PNA		 3232 struct netlink_kernel_cfg cfg = {
3233 .groups = XFRMNLGRP_MAX,
3234 .input = xfrm_netlink_rcv,
3235 };
be33690d 3236
9f00d977 3237 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3238 if (nlsk == NULL)
1da177e4 3239 return -ENOMEM;
d79d792e 3240 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3241 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3242 return 0;
3243}
3244
d79d792e 3245static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3246{
d79d792e
EB		 3247 struct net *net;
3248 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3249 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3250 synchronize_net();
3251 list_for_each_entry(net, net_exit_list, exit_list)
3252 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3253}
3254
a6483b79 3255static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3256 .init = xfrm_user_net_init,
3257 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3258};
3259
3260static int __init xfrm_user_init(void)
3261{
3262 int rv;
3263
3264 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3265
3266 rv = register_pernet_subsys(&xfrm_user_net_ops);
3267 if (rv < 0)
3268 return rv;
3269 rv = xfrm_register_km(&netlink_mgr);
3270 if (rv < 0)
3271 unregister_pernet_subsys(&xfrm_user_net_ops);
3272 return rv;
3273}
3274
3275static void __exit xfrm_user_exit(void)
3276{
3277 xfrm_unregister_km(&netlink_mgr);
3278 unregister_pernet_subsys(&xfrm_user_net_ops);
3279}
3280
1da177e4
LT		 3281module_init(xfrm_user_init);
3282module_exit(xfrm_user_exit);
3283MODULE_LICENSE("GPL");
4fdb3bb7 3284MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3285
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