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i2c: img-scb: use line_status instead of i2c->line_status
[deliverable/linux.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
fa6dd8a2 29#include <net/ah.h>
1da177e4 30#include <asm/uaccess.h>
dfd56b8b 31#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 32#include <linux/in6.h>
33#endif
1da177e4 34
5424f32e 35static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 36{
5424f32e 37 struct nlattr *rt = attrs[type];
1da177e4
LT		 38 struct xfrm_algo *algp;
39
40 if (!rt)
41 return 0;
42
5424f32e 43 algp = nla_data(rt);
0f99be0d 44 if (nla_len(rt) < xfrm_alg_len(algp))
31c26852
HX		 45 return -EINVAL;
46
1da177e4
LT		 47 switch (type) {
48 case XFRMA_ALG_AUTH:
1da177e4 49 case XFRMA_ALG_CRYPT:
1da177e4 50 case XFRMA_ALG_COMP:
1da177e4
LT		 51 break;
52
53 default:
54 return -EINVAL;
3ff50b79 55 }
1da177e4
LT		 56
57 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
58 return 0;
59}
60
4447bb33
MW		 61static int verify_auth_trunc(struct nlattr **attrs)
62{
63 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
64 struct xfrm_algo_auth *algp;
65
66 if (!rt)
67 return 0;
68
69 algp = nla_data(rt);
70 if (nla_len(rt) < xfrm_alg_auth_len(algp))
71 return -EINVAL;
72
73 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
74 return 0;
75}
76
1a6509d9
HX		 77static int verify_aead(struct nlattr **attrs)
78{
79 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
80 struct xfrm_algo_aead *algp;
81
82 if (!rt)
83 return 0;
84
85 algp = nla_data(rt);
86 if (nla_len(rt) < aead_len(algp))
87 return -EINVAL;
88
89 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
90 return 0;
91}
92
5424f32e 93static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 94 xfrm_address_t **addrp)
95{
5424f32e 96 struct nlattr *rt = attrs[type];
eb2971b6 97
cf5cb79f 98 if (rt && addrp)
5424f32e 99 *addrp = nla_data(rt);
eb2971b6 100}
df71837d 101
5424f32e 102static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 103{
5424f32e 104 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 105 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 106
107 if (!rt)
108 return 0;
109
5424f32e 110 uctx = nla_data(rt);
cf5cb79f 111 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 112 return -EINVAL;
113
114 return 0;
115}
116
d8647b79
SK		 117static inline int verify_replay(struct xfrm_usersa_info *p,
118 struct nlattr **attrs)
119{
120 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
ecd79187 121 struct xfrm_replay_state_esn *rs;
d8647b79 122
ecd79187
MK		 123 if (p->flags & XFRM_STATE_ESN) {
124 if (!rt)
125 return -EINVAL;
126
127 rs = nla_data(rt);
128
129 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
130 return -EINVAL;
131
132 if (nla_len(rt) < xfrm_replay_state_esn_len(rs) &&
133 nla_len(rt) != sizeof(*rs))
134 return -EINVAL;
135 }
7833aa05 136
d8647b79
SK		 137 if (!rt)
138 return 0;
139
01714109
FD		 140 /* As only ESP and AH support ESN feature. */
141 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
02aadf72
SK		 142 return -EINVAL;
143
d8647b79
SK		 144 if (p->replay_window != 0)
145 return -EINVAL;
146
147 return 0;
148}
df71837d 149
1da177e4 150static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 151 struct nlattr **attrs)
1da177e4
LT		 152{
153 int err;
154
155 err = -EINVAL;
156 switch (p->family) {
157 case AF_INET:
158 break;
159
160 case AF_INET6:
dfd56b8b 161#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 162 break;
163#else
164 err = -EAFNOSUPPORT;
165 goto out;
166#endif
167
168 default:
169 goto out;
3ff50b79 170 }
1da177e4
LT		 171
172 err = -EINVAL;
173 switch (p->id.proto) {
174 case IPPROTO_AH:
4447bb33
MW		 175 if ((!attrs[XFRMA_ALG_AUTH] &&
176 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 177 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 178 attrs[XFRMA_ALG_CRYPT] ||
35d2856b 179 attrs[XFRMA_ALG_COMP] ||
a0e5ef53 180 attrs[XFRMA_TFCPAD])
1da177e4
LT		 181 goto out;
182 break;
183
184 case IPPROTO_ESP:
1a6509d9
HX		 185 if (attrs[XFRMA_ALG_COMP])
186 goto out;
187 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 188 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 189 !attrs[XFRMA_ALG_CRYPT] &&
190 !attrs[XFRMA_ALG_AEAD])
191 goto out;
192 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 193 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 194 attrs[XFRMA_ALG_CRYPT]) &&
195 attrs[XFRMA_ALG_AEAD])
1da177e4 196 goto out;
35d2856b
MW		 197 if (attrs[XFRMA_TFCPAD] &&
198 p->mode != XFRM_MODE_TUNNEL)
199 goto out;
1da177e4
LT		 200 break;
201
202 case IPPROTO_COMP:
35a7aa08 203 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 204 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 205 attrs[XFRMA_ALG_AUTH] ||
4447bb33 206 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b 207 attrs[XFRMA_ALG_CRYPT] ||
a0e5ef53
TB		 208 attrs[XFRMA_TFCPAD] ||
209 (ntohl(p->id.spi) >= 0x10000))
1da177e4
LT		 210 goto out;
211 break;
212
dfd56b8b 213#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 214 case IPPROTO_DSTOPTS:
215 case IPPROTO_ROUTING:
35a7aa08
TG		 216 if (attrs[XFRMA_ALG_COMP] ||
217 attrs[XFRMA_ALG_AUTH] ||
4447bb33 218 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 219 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 220 attrs[XFRMA_ALG_CRYPT] ||
221 attrs[XFRMA_ENCAP] ||
222 attrs[XFRMA_SEC_CTX] ||
35d2856b 223 attrs[XFRMA_TFCPAD] ||
35a7aa08 224 !attrs[XFRMA_COADDR])
e23c7194
MN		 225 goto out;
226 break;
227#endif
228
1da177e4
LT		 229 default:
230 goto out;
3ff50b79 231 }
1da177e4 232
1a6509d9
HX		 233 if ((err = verify_aead(attrs)))
234 goto out;
4447bb33
MW		 235 if ((err = verify_auth_trunc(attrs)))
236 goto out;
35a7aa08 237 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 238 goto out;
35a7aa08 239 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 240 goto out;
35a7aa08 241 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 242 goto out;
35a7aa08 243 if ((err = verify_sec_ctx_len(attrs)))
df71837d 244 goto out;
d8647b79
SK		 245 if ((err = verify_replay(p, attrs)))
246 goto out;
1da177e4
LT		 247
248 err = -EINVAL;
249 switch (p->mode) {
7e49e6de
MN		 250 case XFRM_MODE_TRANSPORT:
251 case XFRM_MODE_TUNNEL:
060f02a3 252 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 253 case XFRM_MODE_BEET:
1da177e4
LT		 254 break;
255
256 default:
257 goto out;
3ff50b79 258 }
1da177e4
LT		 259
260 err = 0;
261
262out:
263 return err;
264}
265
266static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 267 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 268 struct nlattr *rta)
1da177e4 269{
1da177e4
LT		 270 struct xfrm_algo *p, *ualg;
271 struct xfrm_algo_desc *algo;
272
273 if (!rta)
274 return 0;
275
5424f32e 276 ualg = nla_data(rta);
1da177e4
LT		 277
278 algo = get_byname(ualg->alg_name, 1);
279 if (!algo)
280 return -ENOSYS;
281 *props = algo->desc.sadb_alg_id;
282
0f99be0d 283 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 284 if (!p)
285 return -ENOMEM;
286
04ff1260 287 strcpy(p->alg_name, algo->name);
1da177e4
LT		 288 *algpp = p;
289 return 0;
290}
291
69b0137f
HX		 292static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
293{
294 struct xfrm_algo *p, *ualg;
295 struct xfrm_algo_desc *algo;
296
297 if (!rta)
298 return 0;
299
300 ualg = nla_data(rta);
301
302 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
303 if (!algo)
304 return -ENOSYS;
305 x->props.ealgo = algo->desc.sadb_alg_id;
306
307 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
308 if (!p)
309 return -ENOMEM;
310
311 strcpy(p->alg_name, algo->name);
312 x->ealg = p;
313 x->geniv = algo->uinfo.encr.geniv;
314 return 0;
315}
316
4447bb33
MW		 317static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
318 struct nlattr *rta)
319{
320 struct xfrm_algo *ualg;
321 struct xfrm_algo_auth *p;
322 struct xfrm_algo_desc *algo;
323
324 if (!rta)
325 return 0;
326
327 ualg = nla_data(rta);
328
329 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
330 if (!algo)
331 return -ENOSYS;
332 *props = algo->desc.sadb_alg_id;
333
334 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
335 if (!p)
336 return -ENOMEM;
337
338 strcpy(p->alg_name, algo->name);
339 p->alg_key_len = ualg->alg_key_len;
340 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
341 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
342
343 *algpp = p;
344 return 0;
345}
346
347static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
348 struct nlattr *rta)
349{
350 struct xfrm_algo_auth *p, *ualg;
351 struct xfrm_algo_desc *algo;
352
353 if (!rta)
354 return 0;
355
356 ualg = nla_data(rta);
357
358 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
359 if (!algo)
360 return -ENOSYS;
689f1c9d 361 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 362 return -EINVAL;
363 *props = algo->desc.sadb_alg_id;
364
365 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
366 if (!p)
367 return -ENOMEM;
368
369 strcpy(p->alg_name, algo->name);
370 if (!p->alg_trunc_len)
371 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
372
373 *algpp = p;
374 return 0;
375}
376
69b0137f 377static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
1a6509d9
HX		 378{
379 struct xfrm_algo_aead *p, *ualg;
380 struct xfrm_algo_desc *algo;
381
382 if (!rta)
383 return 0;
384
385 ualg = nla_data(rta);
386
387 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
388 if (!algo)
389 return -ENOSYS;
69b0137f 390 x->props.ealgo = algo->desc.sadb_alg_id;
1a6509d9
HX		 391
392 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
393 if (!p)
394 return -ENOMEM;
395
396 strcpy(p->alg_name, algo->name);
69b0137f
HX		 397 x->aead = p;
398 x->geniv = algo->uinfo.aead.geniv;
1a6509d9
HX		 399 return 0;
400}
401
e2b19125
SK		 402static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
403 struct nlattr *rp)
404{
405 struct xfrm_replay_state_esn *up;
ecd79187 406 int ulen;
e2b19125
SK		 407
408 if (!replay_esn || !rp)
409 return 0;
410
411 up = nla_data(rp);
ecd79187 412 ulen = xfrm_replay_state_esn_len(up);
e2b19125 413
ecd79187 414 if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
e2b19125
SK		 415 return -EINVAL;
416
417 return 0;
418}
419
d8647b79
SK		 420static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
421 struct xfrm_replay_state_esn **preplay_esn,
422 struct nlattr *rta)
423{
424 struct xfrm_replay_state_esn *p, *pp, *up;
ecd79187 425 int klen, ulen;
d8647b79
SK		 426
427 if (!rta)
428 return 0;
429
430 up = nla_data(rta);
ecd79187
MK		 431 klen = xfrm_replay_state_esn_len(up);
432 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
d8647b79 433
ecd79187 434 p = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 435 if (!p)
436 return -ENOMEM;
437
ecd79187 438 pp = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 439 if (!pp) {
440 kfree(p);
441 return -ENOMEM;
442 }
443
ecd79187
MK		 444 memcpy(p, up, ulen);
445 memcpy(pp, up, ulen);
446
d8647b79
SK		 447 *replay_esn = p;
448 *preplay_esn = pp;
449
450 return 0;
451}
452
661697f7 453static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 454{
df71837d
TJ		 455 int len = 0;
456
457 if (xfrm_ctx) {
458 len += sizeof(struct xfrm_user_sec_ctx);
459 len += xfrm_ctx->ctx_len;
460 }
461 return len;
462}
463
1da177e4
LT		 464static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
465{
466 memcpy(&x->id, &p->id, sizeof(x->id));
467 memcpy(&x->sel, &p->sel, sizeof(x->sel));
468 memcpy(&x->lft, &p->lft, sizeof(x->lft));
469 x->props.mode = p->mode;
33fce60d
FD		 470 x->props.replay_window = min_t(unsigned int, p->replay_window,
471 sizeof(x->replay.bitmap) * 8);
1da177e4
LT		 472 x->props.reqid = p->reqid;
473 x->props.family = p->family;
54489c14 474 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 475 x->props.flags = p->flags;
196b0036 476
ccf9b3b8 477 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 478 x->sel.family = p->family;
1da177e4
LT		 479}
480
d51d081d
JHS		 481/*
482 * someday when pfkey also has support, we could have the code
483 * somehow made shareable and move it to xfrm_state.c - JHS
484 *
485*/
e3ac104d
MK		 486static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
487 int update_esn)
d51d081d 488{
5424f32e 489 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
e3ac104d 490 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
5424f32e
TG		 491 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
492 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
493 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 494
d8647b79
SK		 495 if (re) {
496 struct xfrm_replay_state_esn *replay_esn;
497 replay_esn = nla_data(re);
498 memcpy(x->replay_esn, replay_esn,
499 xfrm_replay_state_esn_len(replay_esn));
500 memcpy(x->preplay_esn, replay_esn,
501 xfrm_replay_state_esn_len(replay_esn));
502 }
503
d51d081d
JHS		 504 if (rp) {
505 struct xfrm_replay_state *replay;
5424f32e 506 replay = nla_data(rp);
d51d081d
JHS		 507 memcpy(&x->replay, replay, sizeof(*replay));
508 memcpy(&x->preplay, replay, sizeof(*replay));
509 }
510
511 if (lt) {
512 struct xfrm_lifetime_cur *ltime;
5424f32e 513 ltime = nla_data(lt);
d51d081d
JHS		 514 x->curlft.bytes = ltime->bytes;
515 x->curlft.packets = ltime->packets;
516 x->curlft.add_time = ltime->add_time;
517 x->curlft.use_time = ltime->use_time;
518 }
519
cf5cb79f 520 if (et)
5424f32e 521 x->replay_maxage = nla_get_u32(et);
d51d081d 522
cf5cb79f 523 if (rt)
5424f32e 524 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 525}
526
fc34acd3
AD		 527static struct xfrm_state *xfrm_state_construct(struct net *net,
528 struct xfrm_usersa_info *p,
5424f32e 529 struct nlattr **attrs,
1da177e4
LT		 530 int *errp)
531{
fc34acd3 532 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 533 int err = -ENOMEM;
534
535 if (!x)
536 goto error_no_put;
537
538 copy_from_user_state(x, p);
539
a947b0a9
ND		 540 if (attrs[XFRMA_SA_EXTRA_FLAGS])
541 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
542
69b0137f 543 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
1a6509d9 544 goto error;
4447bb33
MW		 545 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
546 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 547 goto error;
4447bb33
MW		 548 if (!x->props.aalgo) {
549 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
550 attrs[XFRMA_ALG_AUTH])))
551 goto error;
552 }
69b0137f 553 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 554 goto error;
555 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
556 xfrm_calg_get_byname,
35a7aa08 557 attrs[XFRMA_ALG_COMP])))
1da177e4 558 goto error;
fd21150a
TG		 559
560 if (attrs[XFRMA_ENCAP]) {
561 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
562 sizeof(*x->encap), GFP_KERNEL);
563 if (x->encap == NULL)
564 goto error;
565 }
566
35d2856b
MW		 567 if (attrs[XFRMA_TFCPAD])
568 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
569
fd21150a
TG		 570 if (attrs[XFRMA_COADDR]) {
571 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
572 sizeof(*x->coaddr), GFP_KERNEL);
573 if (x->coaddr == NULL)
574 goto error;
575 }
576
6f26b61e
JHS		 577 xfrm_mark_get(attrs, &x->mark);
578
a454f0cc 579 err = __xfrm_init_state(x, false);
1da177e4
LT		 580 if (err)
581 goto error;
582
fd21150a
TG		 583 if (attrs[XFRMA_SEC_CTX] &&
584 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 585 goto error;
586
d8647b79
SK		 587 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
588 attrs[XFRMA_REPLAY_ESN_VAL])))
589 goto error;
590
1da177e4 591 x->km.seq = p->seq;
b27aeadb 592 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 593 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 594 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 595
9fdc4883
SK		 596 if ((err = xfrm_init_replay(x)))
597 goto error;
d51d081d 598
9fdc4883 599 /* override default values from above */
e3ac104d 600 xfrm_update_ae_params(x, attrs, 0);
1da177e4
LT		 601
602 return x;
603
604error:
605 x->km.state = XFRM_STATE_DEAD;
606 xfrm_state_put(x);
607error_no_put:
608 *errp = err;
609 return NULL;
610}
611
22e70050 612static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 613 struct nlattr **attrs)
1da177e4 614{
fc34acd3 615 struct net *net = sock_net(skb->sk);
7b67c857 616 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 617 struct xfrm_state *x;
618 int err;
26b15dad 619 struct km_event c;
1da177e4 620
35a7aa08 621 err = verify_newsa_info(p, attrs);
1da177e4
LT		 622 if (err)
623 return err;
624
fc34acd3 625 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 626 if (!x)
627 return err;
628
26b15dad 629 xfrm_state_hold(x);
1da177e4
LT		 630 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
631 err = xfrm_state_add(x);
632 else
633 err = xfrm_state_update(x);
634
2e71029e 635 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 636
1da177e4
LT		 637 if (err < 0) {
638 x->km.state = XFRM_STATE_DEAD;
21380b81 639 __xfrm_state_put(x);
7d6dfe1f 640 goto out;
1da177e4
LT		 641 }
642
26b15dad 643 c.seq = nlh->nlmsg_seq;
15e47304 644 c.portid = nlh->nlmsg_pid;
f60f6b8f 645 c.event = nlh->nlmsg_type;
26b15dad
JHS		 646
647 km_state_notify(x, &c);
7d6dfe1f 648out:
26b15dad 649 xfrm_state_put(x);
1da177e4
LT		 650 return err;
651}
652
fc34acd3
AD		 653static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
654 struct xfrm_usersa_id *p,
5424f32e 655 struct nlattr **attrs,
eb2971b6
MN		 656 int *errp)
657{
658 struct xfrm_state *x = NULL;
6f26b61e 659 struct xfrm_mark m;
eb2971b6 660 int err;
6f26b61e 661 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 662
663 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
664 err = -ESRCH;
6f26b61e 665 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 666 } else {
667 xfrm_address_t *saddr = NULL;
668
35a7aa08 669 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 670 if (!saddr) {
671 err = -EINVAL;
672 goto out;
673 }
674
9abbffee 675 err = -ESRCH;
6f26b61e
JHS		 676 x = xfrm_state_lookup_byaddr(net, mark,
677 &p->daddr, saddr,
221df1ed 678 p->proto, p->family);
eb2971b6
MN		 679 }
680
681 out:
682 if (!x && errp)
683 *errp = err;
684 return x;
685}
686
22e70050 687static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 688 struct nlattr **attrs)
1da177e4 689{
fc34acd3 690 struct net *net = sock_net(skb->sk);
1da177e4 691 struct xfrm_state *x;
eb2971b6 692 int err = -ESRCH;
26b15dad 693 struct km_event c;
7b67c857 694 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4 695
fc34acd3 696 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 697 if (x == NULL)
eb2971b6 698 return err;
1da177e4 699
6f68dc37 700 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 701 goto out;
702
1da177e4 703 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 704 err = -EPERM;
705 goto out;
1da177e4
LT		 706 }
707
26b15dad 708 err = xfrm_state_delete(x);
161a09e7 709
c8c05a8e
CZ		 710 if (err < 0)
711 goto out;
26b15dad
JHS		 712
713 c.seq = nlh->nlmsg_seq;
15e47304 714 c.portid = nlh->nlmsg_pid;
f60f6b8f 715 c.event = nlh->nlmsg_type;
26b15dad 716 km_state_notify(x, &c);
1da177e4 717
c8c05a8e 718out:
2e71029e 719 xfrm_audit_state_delete(x, err ? 0 : 1, true);
c8c05a8e 720 xfrm_state_put(x);
26b15dad 721 return err;
1da177e4
LT		 722}
723
724static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
725{
f778a636 726 memset(p, 0, sizeof(*p));
1da177e4
LT		 727 memcpy(&p->id, &x->id, sizeof(p->id));
728 memcpy(&p->sel, &x->sel, sizeof(p->sel));
729 memcpy(&p->lft, &x->lft, sizeof(p->lft));
730 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
731 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 732 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 733 p->mode = x->props.mode;
734 p->replay_window = x->props.replay_window;
735 p->reqid = x->props.reqid;
736 p->family = x->props.family;
737 p->flags = x->props.flags;
738 p->seq = x->km.seq;
739}
740
741struct xfrm_dump_info {
742 struct sk_buff *in_skb;
743 struct sk_buff *out_skb;
744 u32 nlmsg_seq;
745 u16 nlmsg_flags;
1da177e4
LT		 746};
747
c0144bea
TG		 748static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
749{
c0144bea
TG		 750 struct xfrm_user_sec_ctx *uctx;
751 struct nlattr *attr;
68325d3b 752 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 753
754 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
755 if (attr == NULL)
756 return -EMSGSIZE;
757
758 uctx = nla_data(attr);
759 uctx->exttype = XFRMA_SEC_CTX;
760 uctx->len = ctx_size;
761 uctx->ctx_doi = s->ctx_doi;
762 uctx->ctx_alg = s->ctx_alg;
763 uctx->ctx_len = s->ctx_len;
764 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
765
766 return 0;
767}
768
4447bb33
MW		 769static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
770{
771 struct xfrm_algo *algo;
772 struct nlattr *nla;
773
774 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
775 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
776 if (!nla)
777 return -EMSGSIZE;
778
779 algo = nla_data(nla);
4c87308b 780 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
4447bb33
MW		 781 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
782 algo->alg_key_len = auth->alg_key_len;
783
784 return 0;
785}
786
68325d3b
HX		 787/* Don't change this without updating xfrm_sa_len! */
788static int copy_to_user_state_extra(struct xfrm_state *x,
789 struct xfrm_usersa_info *p,
790 struct sk_buff *skb)
1da177e4 791{
1d1e34dd 792 int ret = 0;
d0fde795 793
1d1e34dd 794 copy_to_user_state(x, p);
68325d3b 795
a947b0a9
ND		 796 if (x->props.extra_flags) {
797 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
798 x->props.extra_flags);
799 if (ret)
800 goto out;
801 }
802
1d1e34dd
DM		 803 if (x->coaddr) {
804 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
805 if (ret)
806 goto out;
807 }
808 if (x->lastused) {
809 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
810 if (ret)
811 goto out;
812 }
813 if (x->aead) {
814 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
815 if (ret)
816 goto out;
817 }
818 if (x->aalg) {
819 ret = copy_to_user_auth(x->aalg, skb);
820 if (!ret)
821 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
822 xfrm_alg_auth_len(x->aalg), x->aalg);
823 if (ret)
824 goto out;
825 }
826 if (x->ealg) {
827 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
828 if (ret)
829 goto out;
830 }
831 if (x->calg) {
832 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
833 if (ret)
834 goto out;
835 }
836 if (x->encap) {
837 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
838 if (ret)
839 goto out;
840 }
841 if (x->tfcpad) {
842 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
843 if (ret)
844 goto out;
845 }
846 ret = xfrm_mark_put(skb, &x->mark);
847 if (ret)
848 goto out;
f293a5e3 849 if (x->replay_esn)
1d1e34dd
DM		 850 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
851 xfrm_replay_state_esn_len(x->replay_esn),
852 x->replay_esn);
f293a5e3 853 else
854 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
855 &x->replay);
856 if (ret)
857 goto out;
1d1e34dd
DM		 858 if (x->security)
859 ret = copy_sec_ctx(x->security, skb);
860out:
861 return ret;
68325d3b
HX		 862}
863
864static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
865{
866 struct xfrm_dump_info *sp = ptr;
867 struct sk_buff *in_skb = sp->in_skb;
868 struct sk_buff *skb = sp->out_skb;
869 struct xfrm_usersa_info *p;
870 struct nlmsghdr *nlh;
871 int err;
872
15e47304 873 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 874 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
875 if (nlh == NULL)
876 return -EMSGSIZE;
877
878 p = nlmsg_data(nlh);
879
880 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 881 if (err) {
882 nlmsg_cancel(skb, nlh);
883 return err;
884 }
9825069d 885 nlmsg_end(skb, nlh);
1da177e4 886 return 0;
1da177e4
LT		 887}
888
4c563f76
TT		 889static int xfrm_dump_sa_done(struct netlink_callback *cb)
890{
891 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 892 struct sock *sk = cb->skb->sk;
893 struct net *net = sock_net(sk);
894
895 xfrm_state_walk_done(walk, net);
4c563f76
TT		 896 return 0;
897}
898
d3623099 899static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
1da177e4
LT		 900static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
901{
fc34acd3 902 struct net *net = sock_net(skb->sk);
4c563f76 903 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 904 struct xfrm_dump_info info;
905
4c563f76
TT		 906 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
907 sizeof(cb->args) - sizeof(cb->args[0]));
908
1da177e4
LT		 909 info.in_skb = cb->skb;
910 info.out_skb = skb;
911 info.nlmsg_seq = cb->nlh->nlmsg_seq;
912 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 913
914 if (!cb->args[0]) {
d3623099 915 struct nlattr *attrs[XFRMA_MAX+1];
870a2df4 916 struct xfrm_address_filter *filter = NULL;
d3623099
ND		 917 u8 proto = 0;
918 int err;
919
4c563f76 920 cb->args[0] = 1;
d3623099
ND		 921
922 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX,
923 xfrma_policy);
924 if (err < 0)
925 return err;
926
870a2df4 927 if (attrs[XFRMA_ADDRESS_FILTER]) {
df367561
AH		 928 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
929 sizeof(*filter), GFP_KERNEL);
d3623099
ND		 930 if (filter == NULL)
931 return -ENOMEM;
d3623099
ND		 932 }
933
934 if (attrs[XFRMA_PROTO])
935 proto = nla_get_u8(attrs[XFRMA_PROTO]);
936
937 xfrm_state_walk_init(walk, proto, filter);
4c563f76
TT		 938 }
939
fc34acd3 940 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 941
942 return skb->len;
943}
944
945static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
946 struct xfrm_state *x, u32 seq)
947{
948 struct xfrm_dump_info info;
949 struct sk_buff *skb;
864745d2 950 int err;
1da177e4 951
7deb2264 952 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 953 if (!skb)
954 return ERR_PTR(-ENOMEM);
955
1da177e4
LT		 956 info.in_skb = in_skb;
957 info.out_skb = skb;
958 info.nlmsg_seq = seq;
959 info.nlmsg_flags = 0;
1da177e4 960
864745d2
MK		 961 err = dump_one_state(x, 0, &info);
962 if (err) {
1da177e4 963 kfree_skb(skb);
864745d2 964 return ERR_PTR(err);
1da177e4
LT		 965 }
966
967 return skb;
968}
969
21ee543e
MK		 970/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
971 * Must be called with RCU read lock.
972 */
973static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
974 u32 pid, unsigned int group)
975{
976 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
977
978 if (nlsk)
979 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
980 else
981 return -1;
982}
983
7deb2264
TG		 984static inline size_t xfrm_spdinfo_msgsize(void)
985{
986 return NLMSG_ALIGN(4)
987 + nla_total_size(sizeof(struct xfrmu_spdinfo))
880a6fab
CG		 988 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
989 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
990 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
7deb2264
TG		 991}
992
e071041b 993static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 994 u32 portid, u32 seq, u32 flags)
ecfd6b18 995{
5a6d3416
JHS		 996 struct xfrmk_spdinfo si;
997 struct xfrmu_spdinfo spc;
998 struct xfrmu_spdhinfo sph;
880a6fab 999 struct xfrmu_spdhthresh spt4, spt6;
ecfd6b18 1000 struct nlmsghdr *nlh;
1d1e34dd 1001 int err;
ecfd6b18 1002 u32 *f;
880a6fab 1003 unsigned lseq;
ecfd6b18 1004
15e47304 1005 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 1006 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 1007 return -EMSGSIZE;
1008
1009 f = nlmsg_data(nlh);
1010 *f = flags;
e071041b 1011 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 1012 spc.incnt = si.incnt;
1013 spc.outcnt = si.outcnt;
1014 spc.fwdcnt = si.fwdcnt;
1015 spc.inscnt = si.inscnt;
1016 spc.outscnt = si.outscnt;
1017 spc.fwdscnt = si.fwdscnt;
1018 sph.spdhcnt = si.spdhcnt;
1019 sph.spdhmcnt = si.spdhmcnt;
1020
880a6fab
CG		 1021 do {
1022 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1023
1024 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1025 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1026 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1027 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1028 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1029
1d1e34dd
DM		 1030 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1031 if (!err)
1032 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
880a6fab
CG		 1033 if (!err)
1034 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1035 if (!err)
1036 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1d1e34dd
DM		 1037 if (err) {
1038 nlmsg_cancel(skb, nlh);
1039 return err;
1040 }
ecfd6b18 1041
053c095a
JB		 1042 nlmsg_end(skb, nlh);
1043 return 0;
ecfd6b18
JHS		 1044}
1045
880a6fab
CG		 1046static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1047 struct nlattr **attrs)
1048{
1049 struct net *net = sock_net(skb->sk);
1050 struct xfrmu_spdhthresh *thresh4 = NULL;
1051 struct xfrmu_spdhthresh *thresh6 = NULL;
1052
1053 /* selector prefixlen thresholds to hash policies */
1054 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1055 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1056
1057 if (nla_len(rta) < sizeof(*thresh4))
1058 return -EINVAL;
1059 thresh4 = nla_data(rta);
1060 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1061 return -EINVAL;
1062 }
1063 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1064 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1065
1066 if (nla_len(rta) < sizeof(*thresh6))
1067 return -EINVAL;
1068 thresh6 = nla_data(rta);
1069 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1070 return -EINVAL;
1071 }
1072
1073 if (thresh4 || thresh6) {
1074 write_seqlock(&net->xfrm.policy_hthresh.lock);
1075 if (thresh4) {
1076 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1077 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1078 }
1079 if (thresh6) {
1080 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1081 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1082 }
1083 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1084
1085 xfrm_policy_hash_rebuild(net);
1086 }
1087
1088 return 0;
1089}
1090
ecfd6b18 1091static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1092 struct nlattr **attrs)
ecfd6b18 1093{
a6483b79 1094 struct net *net = sock_net(skb->sk);
ecfd6b18 1095 struct sk_buff *r_skb;
7b67c857 1096 u32 *flags = nlmsg_data(nlh);
15e47304 1097 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 1098 u32 seq = nlh->nlmsg_seq;
ecfd6b18 1099
7deb2264 1100 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 1101 if (r_skb == NULL)
1102 return -ENOMEM;
1103
15e47304 1104 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
ecfd6b18
JHS		 1105 BUG();
1106
15e47304 1107 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 1108}
1109
7deb2264
TG		 1110static inline size_t xfrm_sadinfo_msgsize(void)
1111{
1112 return NLMSG_ALIGN(4)
1113 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1114 + nla_total_size(4); /* XFRMA_SAD_CNT */
1115}
1116
e071041b 1117static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1118 u32 portid, u32 seq, u32 flags)
28d8909b 1119{
af11e316
JHS		 1120 struct xfrmk_sadinfo si;
1121 struct xfrmu_sadhinfo sh;
28d8909b 1122 struct nlmsghdr *nlh;
1d1e34dd 1123 int err;
28d8909b
JHS		 1124 u32 *f;
1125
15e47304 1126 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1127 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1128 return -EMSGSIZE;
1129
1130 f = nlmsg_data(nlh);
1131 *f = flags;
e071041b 1132 xfrm_sad_getinfo(net, &si);
28d8909b 1133
af11e316
JHS		 1134 sh.sadhmcnt = si.sadhmcnt;
1135 sh.sadhcnt = si.sadhcnt;
1136
1d1e34dd
DM		 1137 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1138 if (!err)
1139 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1140 if (err) {
1141 nlmsg_cancel(skb, nlh);
1142 return err;
1143 }
28d8909b 1144
053c095a
JB		 1145 nlmsg_end(skb, nlh);
1146 return 0;
28d8909b
JHS		 1147}
1148
1149static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1150 struct nlattr **attrs)
28d8909b 1151{
a6483b79 1152 struct net *net = sock_net(skb->sk);
28d8909b 1153 struct sk_buff *r_skb;
7b67c857 1154 u32 *flags = nlmsg_data(nlh);
15e47304 1155 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1156 u32 seq = nlh->nlmsg_seq;
28d8909b 1157
7deb2264 1158 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1159 if (r_skb == NULL)
1160 return -ENOMEM;
1161
15e47304 1162 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
28d8909b
JHS		 1163 BUG();
1164
15e47304 1165 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1166}
1167
22e70050 1168static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1169 struct nlattr **attrs)
1da177e4 1170{
fc34acd3 1171 struct net *net = sock_net(skb->sk);
7b67c857 1172 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1173 struct xfrm_state *x;
1174 struct sk_buff *resp_skb;
eb2971b6 1175 int err = -ESRCH;
1da177e4 1176
fc34acd3 1177 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1178 if (x == NULL)
1179 goto out_noput;
1180
1181 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1182 if (IS_ERR(resp_skb)) {
1183 err = PTR_ERR(resp_skb);
1184 } else {
15e47304 1185 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1186 }
1187 xfrm_state_put(x);
1188out_noput:
1189 return err;
1190}
1191
22e70050 1192static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1193 struct nlattr **attrs)
1da177e4 1194{
fc34acd3 1195 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1196 struct xfrm_state *x;
1197 struct xfrm_userspi_info *p;
1198 struct sk_buff *resp_skb;
1199 xfrm_address_t *daddr;
1200 int family;
1201 int err;
6f26b61e
JHS		 1202 u32 mark;
1203 struct xfrm_mark m;
1da177e4 1204
7b67c857 1205 p = nlmsg_data(nlh);
776e9dd9 1206 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1207 if (err)
1208 goto out_noput;
1209
1210 family = p->info.family;
1211 daddr = &p->info.id.daddr;
1212
1213 x = NULL;
6f26b61e
JHS		 1214
1215 mark = xfrm_mark_get(attrs, &m);
1da177e4 1216 if (p->info.seq) {
6f26b61e 1217 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1218 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1219 xfrm_state_put(x);
1220 x = NULL;
1221 }
1222 }
1223
1224 if (!x)
6f26b61e 1225 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1226 p->info.id.proto, daddr,
1227 &p->info.saddr, 1,
1228 family);
1229 err = -ENOENT;
1230 if (x == NULL)
1231 goto out_noput;
1232
658b219e
HX		 1233 err = xfrm_alloc_spi(x, p->min, p->max);
1234 if (err)
1235 goto out;
1da177e4 1236
658b219e 1237 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1238 if (IS_ERR(resp_skb)) {
1239 err = PTR_ERR(resp_skb);
1240 goto out;
1241 }
1242
15e47304 1243 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1244
1245out:
1246 xfrm_state_put(x);
1247out_noput:
1248 return err;
1249}
1250
b798a9ed 1251static int verify_policy_dir(u8 dir)
1da177e4
LT		 1252{
1253 switch (dir) {
1254 case XFRM_POLICY_IN:
1255 case XFRM_POLICY_OUT:
1256 case XFRM_POLICY_FWD:
1257 break;
1258
1259 default:
1260 return -EINVAL;
3ff50b79 1261 }
1da177e4
LT		 1262
1263 return 0;
1264}
1265
b798a9ed 1266static int verify_policy_type(u8 type)
f7b6983f
MN		 1267{
1268 switch (type) {
1269 case XFRM_POLICY_TYPE_MAIN:
1270#ifdef CONFIG_XFRM_SUB_POLICY
1271 case XFRM_POLICY_TYPE_SUB:
1272#endif
1273 break;
1274
1275 default:
1276 return -EINVAL;
3ff50b79 1277 }
f7b6983f
MN		 1278
1279 return 0;
1280}
1281
1da177e4
LT		 1282static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1283{
e682adf0
FD		 1284 int ret;
1285
1da177e4
LT		 1286 switch (p->share) {
1287 case XFRM_SHARE_ANY:
1288 case XFRM_SHARE_SESSION:
1289 case XFRM_SHARE_USER:
1290 case XFRM_SHARE_UNIQUE:
1291 break;
1292
1293 default:
1294 return -EINVAL;
3ff50b79 1295 }
1da177e4
LT		 1296
1297 switch (p->action) {
1298 case XFRM_POLICY_ALLOW:
1299 case XFRM_POLICY_BLOCK:
1300 break;
1301
1302 default:
1303 return -EINVAL;
3ff50b79 1304 }
1da177e4
LT		 1305
1306 switch (p->sel.family) {
1307 case AF_INET:
1308 break;
1309
1310 case AF_INET6:
dfd56b8b 1311#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1312 break;
1313#else
1314 return -EAFNOSUPPORT;
1315#endif
1316
1317 default:
1318 return -EINVAL;
3ff50b79 1319 }
1da177e4 1320
e682adf0
FD		 1321 ret = verify_policy_dir(p->dir);
1322 if (ret)
1323 return ret;
1324 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1325 return -EINVAL;
1326
1327 return 0;
1da177e4
LT		 1328}
1329
5424f32e 1330static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1331{
5424f32e 1332 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1333 struct xfrm_user_sec_ctx *uctx;
1334
1335 if (!rt)
1336 return 0;
1337
5424f32e 1338 uctx = nla_data(rt);
52a4c640 1339 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1340}
1341
1da177e4
LT		 1342static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1343 int nr)
1344{
1345 int i;
1346
1347 xp->xfrm_nr = nr;
1348 for (i = 0; i < nr; i++, ut++) {
1349 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1350
1351 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1352 memcpy(&t->saddr, &ut->saddr,
1353 sizeof(xfrm_address_t));
1354 t->reqid = ut->reqid;
1355 t->mode = ut->mode;
1356 t->share = ut->share;
1357 t->optional = ut->optional;
1358 t->aalgos = ut->aalgos;
1359 t->ealgos = ut->ealgos;
1360 t->calgos = ut->calgos;
c5d18e98
HX		 1361 /* If all masks are ~0, then we allow all algorithms. */
1362 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1363 t->encap_family = ut->family;
1da177e4
LT		 1364 }
1365}
1366
b4ad86bf
DM		 1367static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1368{
1369 int i;
1370
1371 if (nr > XFRM_MAX_DEPTH)
1372 return -EINVAL;
1373
1374 for (i = 0; i < nr; i++) {
1375 /* We never validated the ut->family value, so many
1376 * applications simply leave it at zero. The check was
1377 * never made and ut->family was ignored because all
1378 * templates could be assumed to have the same family as
1379 * the policy itself. Now that we will have ipv4-in-ipv6
1380 * and ipv6-in-ipv4 tunnels, this is no longer true.
1381 */
1382 if (!ut[i].family)
1383 ut[i].family = family;
1384
1385 switch (ut[i].family) {
1386 case AF_INET:
1387 break;
dfd56b8b 1388#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1389 case AF_INET6:
1390 break;
1391#endif
1392 default:
1393 return -EINVAL;
3ff50b79 1394 }
b4ad86bf
DM		 1395 }
1396
1397 return 0;
1398}
1399
5424f32e 1400static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1401{
5424f32e 1402 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1403
1404 if (!rt) {
1405 pol->xfrm_nr = 0;
1406 } else {
5424f32e
TG		 1407 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1408 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1409 int err;
1da177e4 1410
b4ad86bf
DM		 1411 err = validate_tmpl(nr, utmpl, pol->family);
1412 if (err)
1413 return err;
1da177e4 1414
5424f32e 1415 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1416 }
1417 return 0;
1418}
1419
5424f32e 1420static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1421{
5424f32e 1422 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1423 struct xfrm_userpolicy_type *upt;
b798a9ed 1424 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1425 int err;
1426
1427 if (rt) {
5424f32e 1428 upt = nla_data(rt);
f7b6983f
MN		 1429 type = upt->type;
1430 }
1431
1432 err = verify_policy_type(type);
1433 if (err)
1434 return err;
1435
1436 *tp = type;
1437 return 0;
1438}
1439
1da177e4
LT		 1440static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1441{
1442 xp->priority = p->priority;
1443 xp->index = p->index;
1444 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1445 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1446 xp->action = p->action;
1447 xp->flags = p->flags;
1448 xp->family = p->sel.family;
1449 /* XXX xp->share = p->share; */
1450}
1451
1452static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1453{
7b789836 1454 memset(p, 0, sizeof(*p));
1da177e4
LT		 1455 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1456 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1457 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1458 p->priority = xp->priority;
1459 p->index = xp->index;
1460 p->sel.family = xp->family;
1461 p->dir = dir;
1462 p->action = xp->action;
1463 p->flags = xp->flags;
1464 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1465}
1466
fc34acd3 1467static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1468{
fc34acd3 1469 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1470 int err;
1471
1472 if (!xp) {
1473 *errp = -ENOMEM;
1474 return NULL;
1475 }
1476
1477 copy_from_user_policy(xp, p);
df71837d 1478
35a7aa08 1479 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1480 if (err)
1481 goto error;
1482
35a7aa08
TG		 1483 if (!(err = copy_from_user_tmpl(xp, attrs)))
1484 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1485 if (err)
1486 goto error;
1da177e4 1487
295fae56
JHS		 1488 xfrm_mark_get(attrs, &xp->mark);
1489
1da177e4 1490 return xp;
f7b6983f
MN		 1491 error:
1492 *errp = err;
12a169e7 1493 xp->walk.dead = 1;
64c31b3f 1494 xfrm_policy_destroy(xp);
f7b6983f 1495 return NULL;
1da177e4
LT		 1496}
1497
22e70050 1498static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1499 struct nlattr **attrs)
1da177e4 1500{
fc34acd3 1501 struct net *net = sock_net(skb->sk);
7b67c857 1502 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1503 struct xfrm_policy *xp;
26b15dad 1504 struct km_event c;
1da177e4
LT		 1505 int err;
1506 int excl;
1507
1508 err = verify_newpolicy_info(p);
df71837d
TJ		 1509 if (err)
1510 return err;
35a7aa08 1511 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1512 if (err)
1513 return err;
1514
fc34acd3 1515 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1516 if (!xp)
1517 return err;
1518
25985edc 1519 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1520 * Aha! this is anti-netlink really i.e more pfkey derived
1521 * in netlink excl is a flag and you wouldnt need
1522 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1523 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1524 err = xfrm_policy_insert(p->dir, xp, excl);
2e71029e 1525 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 1526
1da177e4 1527 if (err) {
03e1ad7b 1528 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1529 kfree(xp);
1530 return err;
1531 }
1532
f60f6b8f 1533 c.event = nlh->nlmsg_type;
26b15dad 1534 c.seq = nlh->nlmsg_seq;
15e47304 1535 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1536 km_policy_notify(xp, p->dir, &c);
1537
1da177e4
LT		 1538 xfrm_pol_put(xp);
1539
1540 return 0;
1541}
1542
1543static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1544{
1545 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1546 int i;
1547
1548 if (xp->xfrm_nr == 0)
1549 return 0;
1550
1551 for (i = 0; i < xp->xfrm_nr; i++) {
1552 struct xfrm_user_tmpl *up = &vec[i];
1553 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1554
1f86840f 1555 memset(up, 0, sizeof(*up));
1da177e4 1556 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1557 up->family = kp->encap_family;
1da177e4
LT		 1558 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1559 up->reqid = kp->reqid;
1560 up->mode = kp->mode;
1561 up->share = kp->share;
1562 up->optional = kp->optional;
1563 up->aalgos = kp->aalgos;
1564 up->ealgos = kp->ealgos;
1565 up->calgos = kp->calgos;
1566 }
df71837d 1567
c0144bea
TG		 1568 return nla_put(skb, XFRMA_TMPL,
1569 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1570}
1571
1572static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1573{
1574 if (x->security) {
1575 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1576 }
1577 return 0;
0d681623 1578}
df71837d 1579
0d681623
SH		 1580static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1581{
1d1e34dd 1582 if (xp->security)
0d681623 1583 return copy_sec_ctx(xp->security, skb);
0d681623 1584 return 0;
df71837d 1585}
cfbfd45a
TG		 1586static inline size_t userpolicy_type_attrsize(void)
1587{
1588#ifdef CONFIG_XFRM_SUB_POLICY
1589 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1590#else
1591 return 0;
1592#endif
1593}
df71837d 1594
f7b6983f 1595#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1596static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1597{
c0144bea
TG		 1598 struct xfrm_userpolicy_type upt = {
1599 .type = type,
1600 };
f7b6983f 1601
c0144bea 1602 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1603}
1604
1605#else
b798a9ed 1606static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1607{
1608 return 0;
1609}
1610#endif
1611
1da177e4
LT		 1612static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1613{
1614 struct xfrm_dump_info *sp = ptr;
1615 struct xfrm_userpolicy_info *p;
1616 struct sk_buff *in_skb = sp->in_skb;
1617 struct sk_buff *skb = sp->out_skb;
1618 struct nlmsghdr *nlh;
1d1e34dd 1619 int err;
1da177e4 1620
15e47304 1621 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1622 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1623 if (nlh == NULL)
1624 return -EMSGSIZE;
1da177e4 1625
7b67c857 1626 p = nlmsg_data(nlh);
1da177e4 1627 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1628 err = copy_to_user_tmpl(xp, skb);
1629 if (!err)
1630 err = copy_to_user_sec_ctx(xp, skb);
1631 if (!err)
1632 err = copy_to_user_policy_type(xp->type, skb);
1633 if (!err)
1634 err = xfrm_mark_put(skb, &xp->mark);
1635 if (err) {
1636 nlmsg_cancel(skb, nlh);
1637 return err;
1638 }
9825069d 1639 nlmsg_end(skb, nlh);
1da177e4 1640 return 0;
1da177e4
LT		 1641}
1642
4c563f76
TT		 1643static int xfrm_dump_policy_done(struct netlink_callback *cb)
1644{
1645 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
283bc9f3 1646 struct net *net = sock_net(cb->skb->sk);
4c563f76 1647
283bc9f3 1648 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1649 return 0;
1650}
1651
1da177e4
LT		 1652static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1653{
fc34acd3 1654 struct net *net = sock_net(skb->sk);
4c563f76 1655 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1656 struct xfrm_dump_info info;
1657
4c563f76
TT		 1658 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1659 sizeof(cb->args) - sizeof(cb->args[0]));
1660
1da177e4
LT		 1661 info.in_skb = cb->skb;
1662 info.out_skb = skb;
1663 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1664 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1665
1666 if (!cb->args[0]) {
1667 cb->args[0] = 1;
1668 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1669 }
1670
fc34acd3 1671 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1672
1673 return skb->len;
1674}
1675
1676static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1677 struct xfrm_policy *xp,
1678 int dir, u32 seq)
1679{
1680 struct xfrm_dump_info info;
1681 struct sk_buff *skb;
c2546372 1682 int err;
1da177e4 1683
7deb2264 1684 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1685 if (!skb)
1686 return ERR_PTR(-ENOMEM);
1687
1da177e4
LT		 1688 info.in_skb = in_skb;
1689 info.out_skb = skb;
1690 info.nlmsg_seq = seq;
1691 info.nlmsg_flags = 0;
1da177e4 1692
c2546372
MK		 1693 err = dump_one_policy(xp, dir, 0, &info);
1694 if (err) {
1da177e4 1695 kfree_skb(skb);
c2546372 1696 return ERR_PTR(err);
1da177e4
LT		 1697 }
1698
1699 return skb;
1700}
1701
22e70050 1702static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1703 struct nlattr **attrs)
1da177e4 1704{
fc34acd3 1705 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1706 struct xfrm_policy *xp;
1707 struct xfrm_userpolicy_id *p;
b798a9ed 1708 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1709 int err;
26b15dad 1710 struct km_event c;
1da177e4 1711 int delete;
295fae56
JHS		 1712 struct xfrm_mark m;
1713 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1714
7b67c857 1715 p = nlmsg_data(nlh);
1da177e4
LT		 1716 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1717
35a7aa08 1718 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1719 if (err)
1720 return err;
1721
1da177e4
LT		 1722 err = verify_policy_dir(p->dir);
1723 if (err)
1724 return err;
1725
1726 if (p->index)
295fae56 1727 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1728 else {
5424f32e 1729 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1730 struct xfrm_sec_ctx *ctx;
df71837d 1731
35a7aa08 1732 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1733 if (err)
1734 return err;
1735
2c8dd116 1736 ctx = NULL;
df71837d 1737 if (rt) {
5424f32e 1738 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1739
52a4c640 1740 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1741 if (err)
df71837d 1742 return err;
2c8dd116 1743 }
295fae56 1744 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1745 ctx, delete, &err);
03e1ad7b 1746 security_xfrm_policy_free(ctx);
df71837d 1747 }
1da177e4
LT		 1748 if (xp == NULL)
1749 return -ENOENT;
1750
1751 if (!delete) {
1752 struct sk_buff *resp_skb;
1753
1754 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1755 if (IS_ERR(resp_skb)) {
1756 err = PTR_ERR(resp_skb);
1757 } else {
a6483b79 1758 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1759 NETLINK_CB(skb).portid);
1da177e4 1760 }
26b15dad 1761 } else {
2e71029e 1762 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 1763
1764 if (err != 0)
c8c05a8e 1765 goto out;
13fcfbb0 1766
e7443892 1767 c.data.byid = p->index;
f60f6b8f 1768 c.event = nlh->nlmsg_type;
26b15dad 1769 c.seq = nlh->nlmsg_seq;
15e47304 1770 c.portid = nlh->nlmsg_pid;
26b15dad 1771 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1772 }
1773
c8c05a8e 1774out:
ef41aaa0 1775 xfrm_pol_put(xp);
e4c17216
PM		 1776 if (delete && err == 0)
1777 xfrm_garbage_collect(net);
1da177e4
LT		 1778 return err;
1779}
1780
22e70050 1781static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1782 struct nlattr **attrs)
1da177e4 1783{
fc34acd3 1784 struct net *net = sock_net(skb->sk);
26b15dad 1785 struct km_event c;
7b67c857 1786 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
4aa2e62c 1787 int err;
1da177e4 1788
2e71029e 1789 err = xfrm_state_flush(net, p->proto, true);
9e64cc95
JHS		 1790 if (err) {
1791 if (err == -ESRCH) /* empty table */
1792 return 0;
069c474e 1793 return err;
9e64cc95 1794 }
bf08867f 1795 c.data.proto = p->proto;
f60f6b8f 1796 c.event = nlh->nlmsg_type;
26b15dad 1797 c.seq = nlh->nlmsg_seq;
15e47304 1798 c.portid = nlh->nlmsg_pid;
7067802e 1799 c.net = net;
26b15dad
JHS		 1800 km_state_notify(NULL, &c);
1801
1da177e4
LT		 1802 return 0;
1803}
1804
d8647b79 1805static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1806{
d8647b79
SK		 1807 size_t replay_size = x->replay_esn ?
1808 xfrm_replay_state_esn_len(x->replay_esn) :
1809 sizeof(struct xfrm_replay_state);
1810
7deb2264 1811 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1812 + nla_total_size(replay_size)
7deb2264 1813 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1814 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1815 + nla_total_size(4) /* XFRM_AE_RTHR */
1816 + nla_total_size(4); /* XFRM_AE_ETHR */
1817}
d51d081d 1818
214e005b 1819static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1820{
1821 struct xfrm_aevent_id *id;
1822 struct nlmsghdr *nlh;
1d1e34dd 1823 int err;
d51d081d 1824
15e47304 1825 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1826 if (nlh == NULL)
1827 return -EMSGSIZE;
d51d081d 1828
7b67c857 1829 id = nlmsg_data(nlh);
9b7a787d 1830 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1831 id->sa_id.spi = x->id.spi;
1832 id->sa_id.family = x->props.family;
1833 id->sa_id.proto = x->id.proto;
9b7a787d 1834 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1835 id->reqid = x->props.reqid;
d51d081d
JHS		 1836 id->flags = c->data.aevent;
1837
d0fde795 1838 if (x->replay_esn) {
1d1e34dd
DM		 1839 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1840 xfrm_replay_state_esn_len(x->replay_esn),
1841 x->replay_esn);
d0fde795 1842 } else {
1d1e34dd
DM		 1843 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1844 &x->replay);
d0fde795 1845 }
1d1e34dd
DM		 1846 if (err)
1847 goto out_cancel;
1848 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1849 if (err)
1850 goto out_cancel;
d51d081d 1851
1d1e34dd
DM		 1852 if (id->flags & XFRM_AE_RTHR) {
1853 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1854 if (err)
1855 goto out_cancel;
1856 }
1857 if (id->flags & XFRM_AE_ETHR) {
1858 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1859 x->replay_maxage * 10 / HZ);
1860 if (err)
1861 goto out_cancel;
1862 }
1863 err = xfrm_mark_put(skb, &x->mark);
1864 if (err)
1865 goto out_cancel;
6f26b61e 1866
053c095a
JB		 1867 nlmsg_end(skb, nlh);
1868 return 0;
d51d081d 1869
1d1e34dd 1870out_cancel:
9825069d 1871 nlmsg_cancel(skb, nlh);
1d1e34dd 1872 return err;
d51d081d
JHS		 1873}
1874
22e70050 1875static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1876 struct nlattr **attrs)
d51d081d 1877{
fc34acd3 1878 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1879 struct xfrm_state *x;
1880 struct sk_buff *r_skb;
1881 int err;
1882 struct km_event c;
6f26b61e
JHS		 1883 u32 mark;
1884 struct xfrm_mark m;
7b67c857 1885 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1886 struct xfrm_usersa_id *id = &p->sa_id;
1887
6f26b61e
JHS		 1888 mark = xfrm_mark_get(attrs, &m);
1889
1890 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1891 if (x == NULL)
d51d081d 1892 return -ESRCH;
d8647b79
SK		 1893
1894 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1895 if (r_skb == NULL) {
1896 xfrm_state_put(x);
1897 return -ENOMEM;
d51d081d
JHS		 1898 }
1899
1900 /*
1901 * XXX: is this lock really needed - none of the other
1902 * gets lock (the concern is things getting updated
1903 * while we are still reading) - jhs
1904 */
1905 spin_lock_bh(&x->lock);
1906 c.data.aevent = p->flags;
1907 c.seq = nlh->nlmsg_seq;
15e47304 1908 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1909
1910 if (build_aevent(r_skb, x, &c) < 0)
1911 BUG();
15e47304 1912 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1913 spin_unlock_bh(&x->lock);
1914 xfrm_state_put(x);
1915 return err;
1916}
1917
22e70050 1918static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1919 struct nlattr **attrs)
d51d081d 1920{
fc34acd3 1921 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1922 struct xfrm_state *x;
1923 struct km_event c;
02d0892f 1924 int err = -EINVAL;
6f26b61e
JHS		 1925 u32 mark = 0;
1926 struct xfrm_mark m;
7b67c857 1927 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1928 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1929 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1930 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d 1931
d8647b79 1932 if (!lt && !rp && !re)
d51d081d
JHS		 1933 return err;
1934
1935 /* pedantic mode - thou shalt sayeth replaceth */
1936 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1937 return err;
1938
6f26b61e
JHS		 1939 mark = xfrm_mark_get(attrs, &m);
1940
1941 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1942 if (x == NULL)
1943 return -ESRCH;
1944
1945 if (x->km.state != XFRM_STATE_VALID)
1946 goto out;
1947
4479ff76 1948 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 1949 if (err)
1950 goto out;
1951
d51d081d 1952 spin_lock_bh(&x->lock);
e3ac104d 1953 xfrm_update_ae_params(x, attrs, 1);
d51d081d 1954 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1955
1956 c.event = nlh->nlmsg_type;
1957 c.seq = nlh->nlmsg_seq;
15e47304 1958 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1959 c.data.aevent = XFRM_AE_CU;
1960 km_state_notify(x, &c);
1961 err = 0;
1962out:
1963 xfrm_state_put(x);
1964 return err;
1965}
1966
22e70050 1967static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1968 struct nlattr **attrs)
1da177e4 1969{
fc34acd3 1970 struct net *net = sock_net(skb->sk);
f7b6983f 1971 struct km_event c;
b798a9ed 1972 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1973 int err;
1974
35a7aa08 1975 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1976 if (err)
1977 return err;
26b15dad 1978
2e71029e 1979 err = xfrm_policy_flush(net, type, true);
2f1eb65f
JHS		 1980 if (err) {
1981 if (err == -ESRCH) /* empty table */
1982 return 0;
069c474e 1983 return err;
2f1eb65f
JHS		 1984 }
1985
f7b6983f 1986 c.data.type = type;
f60f6b8f 1987 c.event = nlh->nlmsg_type;
26b15dad 1988 c.seq = nlh->nlmsg_seq;
15e47304 1989 c.portid = nlh->nlmsg_pid;
7067802e 1990 c.net = net;
26b15dad 1991 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1992 return 0;
1993}
1994
22e70050 1995static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1996 struct nlattr **attrs)
6c5c8ca7 1997{
fc34acd3 1998 struct net *net = sock_net(skb->sk);
6c5c8ca7 1999 struct xfrm_policy *xp;
7b67c857 2000 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 2001 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 2002 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 2003 int err = -ENOENT;
295fae56
JHS		 2004 struct xfrm_mark m;
2005 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 2006
35a7aa08 2007 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2008 if (err)
2009 return err;
2010
c8bf4d04
TT		 2011 err = verify_policy_dir(p->dir);
2012 if (err)
2013 return err;
2014
6c5c8ca7 2015 if (p->index)
295fae56 2016 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 2017 else {
5424f32e 2018 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 2019 struct xfrm_sec_ctx *ctx;
6c5c8ca7 2020
35a7aa08 2021 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 2022 if (err)
2023 return err;
2024
2c8dd116 2025 ctx = NULL;
6c5c8ca7 2026 if (rt) {
5424f32e 2027 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 2028
52a4c640 2029 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 2030 if (err)
6c5c8ca7 2031 return err;
2c8dd116 2032 }
295fae56 2033 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 2034 &p->sel, ctx, 0, &err);
03e1ad7b 2035 security_xfrm_policy_free(ctx);
6c5c8ca7 2036 }
6c5c8ca7 2037 if (xp == NULL)
ef41aaa0 2038 return -ENOENT;
03e1ad7b 2039
ea2dea9d 2040 if (unlikely(xp->walk.dead))
6c5c8ca7 2041 goto out;
6c5c8ca7 2042
6c5c8ca7
JHS		 2043 err = 0;
2044 if (up->hard) {
2045 xfrm_policy_delete(xp, p->dir);
2e71029e 2046 xfrm_audit_policy_delete(xp, 1, true);
6c5c8ca7
JHS		 2047 } else {
2048 // reset the timers here?
0c199a90 2049 WARN(1, "Don't know what to do with soft policy expire\n");
6c5c8ca7 2050 }
c6bb8136 2051 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 2052
2053out:
2054 xfrm_pol_put(xp);
2055 return err;
2056}
2057
22e70050 2058static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2059 struct nlattr **attrs)
53bc6b4d 2060{
fc34acd3 2061 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 2062 struct xfrm_state *x;
2063 int err;
7b67c857 2064 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 2065 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 2066 struct xfrm_mark m;
928497f0 2067 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 2068
6f26b61e 2069 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 2070
3a765aa5 2071 err = -ENOENT;
53bc6b4d
JHS		 2072 if (x == NULL)
2073 return err;
2074
53bc6b4d 2075 spin_lock_bh(&x->lock);
3a765aa5 2076 err = -EINVAL;
53bc6b4d
JHS		 2077 if (x->km.state != XFRM_STATE_VALID)
2078 goto out;
c6bb8136 2079 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 2080
161a09e7 2081 if (ue->hard) {
53bc6b4d 2082 __xfrm_state_delete(x);
2e71029e 2083 xfrm_audit_state_delete(x, 1, true);
161a09e7 2084 }
3a765aa5 2085 err = 0;
53bc6b4d
JHS		 2086out:
2087 spin_unlock_bh(&x->lock);
2088 xfrm_state_put(x);
2089 return err;
2090}
2091
22e70050 2092static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2093 struct nlattr **attrs)
980ebd25 2094{
fc34acd3 2095 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2096 struct xfrm_policy *xp;
2097 struct xfrm_user_tmpl *ut;
2098 int i;
5424f32e 2099 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2100 struct xfrm_mark mark;
980ebd25 2101
7b67c857 2102 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2103 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2104 int err = -ENOMEM;
2105
2106 if (!x)
d8eb9307 2107 goto nomem;
980ebd25 2108
6f26b61e
JHS		 2109 xfrm_mark_get(attrs, &mark);
2110
980ebd25 2111 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 2112 if (err)
2113 goto bad_policy;
980ebd25
JHS		 2114
2115 /* build an XP */
fc34acd3 2116 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2117 if (!xp)
2118 goto free_state;
980ebd25
JHS		 2119
2120 memcpy(&x->id, &ua->id, sizeof(ua->id));
2121 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2122 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2123 xp->mark.m = x->mark.m = mark.m;
2124 xp->mark.v = x->mark.v = mark.v;
5424f32e 2125 ut = nla_data(rt);
980ebd25
JHS		 2126 /* extract the templates and for each call km_key */
2127 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2128 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2129 memcpy(&x->id, &t->id, sizeof(x->id));
2130 x->props.mode = t->mode;
2131 x->props.reqid = t->reqid;
2132 x->props.family = ut->family;
2133 t->aalgos = ua->aalgos;
2134 t->ealgos = ua->ealgos;
2135 t->calgos = ua->calgos;
2136 err = km_query(x, t, xp);
2137
2138 }
2139
2140 kfree(x);
2141 kfree(xp);
2142
2143 return 0;
d8eb9307
IJ		 2144
2145bad_policy:
62db5cfd 2146 WARN(1, "BAD policy passed\n");
d8eb9307
IJ		 2147free_state:
2148 kfree(x);
2149nomem:
2150 return err;
980ebd25
JHS		 2151}
2152
5c79de6e 2153#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2154static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2155 struct xfrm_kmaddress *k,
5424f32e 2156 struct nlattr **attrs, int *num)
5c79de6e 2157{
5424f32e 2158 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2159 struct xfrm_user_migrate *um;
2160 int i, num_migrate;
2161
13c1d189
AE		 2162 if (k != NULL) {
2163 struct xfrm_user_kmaddress *uk;
2164
2165 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2166 memcpy(&k->local, &uk->local, sizeof(k->local));
2167 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2168 k->family = uk->family;
2169 k->reserved = uk->reserved;
2170 }
2171
5424f32e
TG		 2172 um = nla_data(rt);
2173 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2174
2175 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2176 return -EINVAL;
2177
2178 for (i = 0; i < num_migrate; i++, um++, ma++) {
2179 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2180 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2181 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2182 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2183
2184 ma->proto = um->proto;
2185 ma->mode = um->mode;
2186 ma->reqid = um->reqid;
2187
2188 ma->old_family = um->old_family;
2189 ma->new_family = um->new_family;
2190 }
2191
2192 *num = i;
2193 return 0;
2194}
2195
2196static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2197 struct nlattr **attrs)
5c79de6e 2198{
7b67c857 2199 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2200 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2201 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2202 u8 type;
2203 int err;
2204 int n = 0;
8d549c4f 2205 struct net *net = sock_net(skb->sk);
5c79de6e 2206
35a7aa08 2207 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2208 return -EINVAL;
5c79de6e 2209
13c1d189
AE		 2210 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2211
5424f32e 2212 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2213 if (err)
2214 return err;
2215
13c1d189 2216 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2217 if (err)
2218 return err;
2219
2220 if (!n)
2221 return 0;
2222
8d549c4f 2223 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
5c79de6e
SS		 2224
2225 return 0;
2226}
2227#else
2228static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2229 struct nlattr **attrs)
5c79de6e
SS		 2230{
2231 return -ENOPROTOOPT;
2232}
2233#endif
2234
2235#ifdef CONFIG_XFRM_MIGRATE
183cad12 2236static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2237{
2238 struct xfrm_user_migrate um;
2239
2240 memset(&um, 0, sizeof(um));
2241 um.proto = m->proto;
2242 um.mode = m->mode;
2243 um.reqid = m->reqid;
2244 um.old_family = m->old_family;
2245 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2246 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2247 um.new_family = m->new_family;
2248 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2249 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2250
c0144bea 2251 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2252}
2253
183cad12 2254static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2255{
2256 struct xfrm_user_kmaddress uk;
2257
2258 memset(&uk, 0, sizeof(uk));
2259 uk.family = k->family;
2260 uk.reserved = k->reserved;
2261 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2262 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2263
2264 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2265}
2266
2267static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 2268{
2269 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 2270 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2271 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2272 + userpolicy_type_attrsize();
7deb2264
TG		 2273}
2274
183cad12
DM		 2275static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2276 int num_migrate, const struct xfrm_kmaddress *k,
2277 const struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e 2278{
183cad12 2279 const struct xfrm_migrate *mp;
5c79de6e
SS		 2280 struct xfrm_userpolicy_id *pol_id;
2281 struct nlmsghdr *nlh;
1d1e34dd 2282 int i, err;
5c79de6e 2283
79b8b7f4
TG		 2284 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2285 if (nlh == NULL)
2286 return -EMSGSIZE;
5c79de6e 2287
7b67c857 2288 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2289 /* copy data from selector, dir, and type to the pol_id */
2290 memset(pol_id, 0, sizeof(*pol_id));
2291 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2292 pol_id->dir = dir;
2293
1d1e34dd
DM		 2294 if (k != NULL) {
2295 err = copy_to_user_kmaddress(k, skb);
2296 if (err)
2297 goto out_cancel;
2298 }
2299 err = copy_to_user_policy_type(type, skb);
2300 if (err)
2301 goto out_cancel;
5c79de6e 2302 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2303 err = copy_to_user_migrate(mp, skb);
2304 if (err)
2305 goto out_cancel;
5c79de6e
SS		 2306 }
2307
053c095a
JB		 2308 nlmsg_end(skb, nlh);
2309 return 0;
1d1e34dd
DM		 2310
2311out_cancel:
9825069d 2312 nlmsg_cancel(skb, nlh);
1d1e34dd 2313 return err;
5c79de6e
SS		 2314}
2315
183cad12
DM		 2316static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2317 const struct xfrm_migrate *m, int num_migrate,
2318 const struct xfrm_kmaddress *k)
5c79de6e 2319{
a6483b79 2320 struct net *net = &init_net;
5c79de6e 2321 struct sk_buff *skb;
5c79de6e 2322
13c1d189 2323 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2324 if (skb == NULL)
2325 return -ENOMEM;
2326
2327 /* build migrate */
13c1d189 2328 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2329 BUG();
2330
21ee543e 2331 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
5c79de6e
SS		 2332}
2333#else
183cad12
DM		 2334static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2335 const struct xfrm_migrate *m, int num_migrate,
2336 const struct xfrm_kmaddress *k)
5c79de6e
SS		 2337{
2338 return -ENOPROTOOPT;
2339}
2340#endif
d51d081d 2341
a7bd9a45 2342#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2343
2344static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2345 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2346 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2347 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2348 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2349 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2350 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2351 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2352 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2353 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2354 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2355 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2356 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2357 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2358 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2359 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2360 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2361 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2362 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45 2363 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
880a6fab 2364 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
a7bd9a45 2365 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2366};
2367
492b558b
TG		 2368#undef XMSGSIZE
2369
cf5cb79f 2370static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2371 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2372 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2373 [XFRMA_LASTUSED] = { .type = NLA_U64},
2374 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2375 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2376 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2377 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2378 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2379 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2380 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2381 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2382 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2383 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2384 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2385 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2386 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2387 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2388 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2389 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2390 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2391 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2392 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2393 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2394 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
d3623099 2395 [XFRMA_PROTO] = { .type = NLA_U8 },
870a2df4 2396 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
cf5cb79f
TG		 2397};
2398
880a6fab
CG		 2399static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2400 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2401 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2402};
2403
05600a79 2404static const struct xfrm_link {
5424f32e 2405 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2406 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2407 int (*done)(struct netlink_callback *);
880a6fab
CG		 2408 const struct nla_policy *nla_pol;
2409 int nla_max;
492b558b
TG		 2410} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2411 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2412 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2413 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2414 .dump = xfrm_dump_sa,
2415 .done = xfrm_dump_sa_done },
492b558b
TG		 2416 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2417 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2418 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2419 .dump = xfrm_dump_policy,
2420 .done = xfrm_dump_policy_done },
492b558b 2421 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2422 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2423 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2424 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2425 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2426 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2427 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2428 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2429 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2430 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2431 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2432 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
880a6fab
CG		 2433 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2434 .nla_pol = xfrma_spd_policy,
2435 .nla_max = XFRMA_SPD_MAX },
ecfd6b18 2436 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2437};
2438
1d00a4eb 2439static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2440{
a6483b79 2441 struct net *net = sock_net(skb->sk);
35a7aa08 2442 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2443 const struct xfrm_link *link;
a7bd9a45 2444 int type, err;
1da177e4 2445
74005991
FD		 2446#ifdef CONFIG_COMPAT
2447 if (is_compat_task())
2448 return -ENOTSUPP;
2449#endif
2450
1da177e4 2451 type = nlh->nlmsg_type;
1da177e4 2452 if (type > XFRM_MSG_MAX)
1d00a4eb 2453 return -EINVAL;
1da177e4
LT		 2454
2455 type -= XFRM_MSG_BASE;
2456 link = &xfrm_dispatch[type];
2457
2458 /* All operations require privileges, even GET */
90f62cf3 2459 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 2460 return -EPERM;
1da177e4 2461
492b558b
TG		 2462 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2463 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2464 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2465 if (link->dump == NULL)
1d00a4eb 2466 return -EINVAL;
88fc2c84 2467
80d326fa
PNA		 2468 {
2469 struct netlink_dump_control c = {
2470 .dump = link->dump,
2471 .done = link->done,
2472 };
2473 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2474 }
1da177e4
LT		 2475 }
2476
880a6fab
CG		 2477 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2478 link->nla_max ? : XFRMA_MAX,
2479 link->nla_pol ? : xfrma_policy);
a7bd9a45
TG		 2480 if (err < 0)
2481 return err;
1da177e4
LT		 2482
2483 if (link->doit == NULL)
1d00a4eb 2484 return -EINVAL;
1da177e4 2485
5424f32e 2486 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2487}
2488
cd40b7d3 2489static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2490{
283bc9f3
FD		 2491 struct net *net = sock_net(skb->sk);
2492
2493 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2494 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2495 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2496}
2497
7deb2264
TG		 2498static inline size_t xfrm_expire_msgsize(void)
2499{
6f26b61e
JHS		 2500 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2501 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2502}
2503
214e005b 2504static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2505{
2506 struct xfrm_user_expire *ue;
2507 struct nlmsghdr *nlh;
1d1e34dd 2508 int err;
1da177e4 2509
15e47304 2510 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2511 if (nlh == NULL)
2512 return -EMSGSIZE;
1da177e4 2513
7b67c857 2514 ue = nlmsg_data(nlh);
1da177e4 2515 copy_to_user_state(x, &ue->state);
d51d081d 2516 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2517
1d1e34dd
DM		 2518 err = xfrm_mark_put(skb, &x->mark);
2519 if (err)
2520 return err;
6f26b61e 2521
053c095a
JB		 2522 nlmsg_end(skb, nlh);
2523 return 0;
1da177e4
LT		 2524}
2525
214e005b 2526static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2527{
fc34acd3 2528 struct net *net = xs_net(x);
1da177e4
LT		 2529 struct sk_buff *skb;
2530
7deb2264 2531 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2532 if (skb == NULL)
2533 return -ENOMEM;
2534
6f26b61e
JHS		 2535 if (build_expire(skb, x, c) < 0) {
2536 kfree_skb(skb);
2537 return -EMSGSIZE;
2538 }
1da177e4 2539
21ee543e 2540 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2541}
2542
214e005b 2543static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2544{
fc34acd3 2545 struct net *net = xs_net(x);
d51d081d 2546 struct sk_buff *skb;
d51d081d 2547
d8647b79 2548 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2549 if (skb == NULL)
2550 return -ENOMEM;
2551
2552 if (build_aevent(skb, x, c) < 0)
2553 BUG();
2554
21ee543e 2555 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
d51d081d
JHS		 2556}
2557
214e005b 2558static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2559{
7067802e 2560 struct net *net = c->net;
26b15dad
JHS		 2561 struct xfrm_usersa_flush *p;
2562 struct nlmsghdr *nlh;
2563 struct sk_buff *skb;
7deb2264 2564 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2565
7deb2264 2566 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2567 if (skb == NULL)
2568 return -ENOMEM;
26b15dad 2569
15e47304 2570 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2571 if (nlh == NULL) {
2572 kfree_skb(skb);
2573 return -EMSGSIZE;
2574 }
26b15dad 2575
7b67c857 2576 p = nlmsg_data(nlh);
bf08867f 2577 p->proto = c->data.proto;
26b15dad 2578
9825069d 2579 nlmsg_end(skb, nlh);
26b15dad 2580
21ee543e 2581 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad
JHS		 2582}
2583
7deb2264 2584static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2585{
7deb2264 2586 size_t l = 0;
1a6509d9
HX		 2587 if (x->aead)
2588 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2589 if (x->aalg) {
2590 l += nla_total_size(sizeof(struct xfrm_algo) +
2591 (x->aalg->alg_key_len + 7) / 8);
2592 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2593 }
26b15dad 2594 if (x->ealg)
0f99be0d 2595 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2596 if (x->calg)
7deb2264 2597 l += nla_total_size(sizeof(*x->calg));
26b15dad 2598 if (x->encap)
7deb2264 2599 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2600 if (x->tfcpad)
2601 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2602 if (x->replay_esn)
2603 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
f293a5e3 2604 else
2605 l += nla_total_size(sizeof(struct xfrm_replay_state));
68325d3b
HX		 2606 if (x->security)
2607 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2608 x->security->ctx_len);
2609 if (x->coaddr)
2610 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2611 if (x->props.extra_flags)
2612 l += nla_total_size(sizeof(x->props.extra_flags));
68325d3b 2613
d26f3984
HX		 2614 /* Must count x->lastused as it may become non-zero behind our back. */
2615 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2616
2617 return l;
2618}
2619
214e005b 2620static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2621{
fc34acd3 2622 struct net *net = xs_net(x);
26b15dad 2623 struct xfrm_usersa_info *p;
0603eac0 2624 struct xfrm_usersa_id *id;
26b15dad
JHS		 2625 struct nlmsghdr *nlh;
2626 struct sk_buff *skb;
26b15dad 2627 int len = xfrm_sa_len(x);
1d1e34dd 2628 int headlen, err;
0603eac0
HX		 2629
2630 headlen = sizeof(*p);
2631 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2632 len += nla_total_size(headlen);
0603eac0 2633 headlen = sizeof(*id);
6f26b61e 2634 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2635 }
7deb2264 2636 len += NLMSG_ALIGN(headlen);
26b15dad 2637
7deb2264 2638 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2639 if (skb == NULL)
2640 return -ENOMEM;
26b15dad 2641
15e47304 2642 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2643 err = -EMSGSIZE;
79b8b7f4 2644 if (nlh == NULL)
1d1e34dd 2645 goto out_free_skb;
26b15dad 2646
7b67c857 2647 p = nlmsg_data(nlh);
0603eac0 2648 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2649 struct nlattr *attr;
2650
7b67c857 2651 id = nlmsg_data(nlh);
0603eac0
HX		 2652 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2653 id->spi = x->id.spi;
2654 id->family = x->props.family;
2655 id->proto = x->id.proto;
2656
c0144bea 2657 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2658 err = -EMSGSIZE;
c0144bea 2659 if (attr == NULL)
1d1e34dd 2660 goto out_free_skb;
c0144bea
TG		 2661
2662 p = nla_data(attr);
0603eac0 2663 }
1d1e34dd
DM		 2664 err = copy_to_user_state_extra(x, p, skb);
2665 if (err)
2666 goto out_free_skb;
26b15dad 2667
9825069d 2668 nlmsg_end(skb, nlh);
26b15dad 2669
21ee543e 2670 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad 2671
1d1e34dd 2672out_free_skb:
26b15dad 2673 kfree_skb(skb);
1d1e34dd 2674 return err;
26b15dad
JHS		 2675}
2676
214e005b 2677static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2678{
2679
2680 switch (c->event) {
f60f6b8f 2681 case XFRM_MSG_EXPIRE:
26b15dad 2682 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2683 case XFRM_MSG_NEWAE:
2684 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2685 case XFRM_MSG_DELSA:
2686 case XFRM_MSG_UPDSA:
2687 case XFRM_MSG_NEWSA:
26b15dad 2688 return xfrm_notify_sa(x, c);
f60f6b8f 2689 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2690 return xfrm_notify_sa_flush(c);
2691 default:
62db5cfd 2692 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2693 c->event);
2694 break;
26b15dad
JHS		 2695 }
2696
2697 return 0;
2698
2699}
2700
7deb2264
TG		 2701static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2702 struct xfrm_policy *xp)
2703{
2704 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2705 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2706 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2707 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2708 + userpolicy_type_attrsize();
2709}
2710
1da177e4 2711static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2712 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2713{
1d1e34dd 2714 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2715 struct xfrm_user_acquire *ua;
2716 struct nlmsghdr *nlh;
1d1e34dd 2717 int err;
1da177e4 2718
79b8b7f4
TG		 2719 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2720 if (nlh == NULL)
2721 return -EMSGSIZE;
1da177e4 2722
7b67c857 2723 ua = nlmsg_data(nlh);
1da177e4
LT		 2724 memcpy(&ua->id, &x->id, sizeof(ua->id));
2725 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2726 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2727 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2728 ua->aalgos = xt->aalgos;
2729 ua->ealgos = xt->ealgos;
2730 ua->calgos = xt->calgos;
2731 ua->seq = x->km.seq = seq;
2732
1d1e34dd
DM		 2733 err = copy_to_user_tmpl(xp, skb);
2734 if (!err)
2735 err = copy_to_user_state_sec_ctx(x, skb);
2736 if (!err)
2737 err = copy_to_user_policy_type(xp->type, skb);
2738 if (!err)
2739 err = xfrm_mark_put(skb, &xp->mark);
2740 if (err) {
2741 nlmsg_cancel(skb, nlh);
2742 return err;
2743 }
1da177e4 2744
053c095a
JB		 2745 nlmsg_end(skb, nlh);
2746 return 0;
1da177e4
LT		 2747}
2748
2749static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2750 struct xfrm_policy *xp)
1da177e4 2751{
a6483b79 2752 struct net *net = xs_net(x);
1da177e4 2753 struct sk_buff *skb;
1da177e4 2754
7deb2264 2755 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2756 if (skb == NULL)
2757 return -ENOMEM;
2758
65e0736b 2759 if (build_acquire(skb, x, xt, xp) < 0)
1da177e4
LT		 2760 BUG();
2761
21ee543e 2762 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
1da177e4
LT		 2763}
2764
2765/* User gives us xfrm_user_policy_info followed by an array of 0
2766 * or more templates.
2767 */
cb969f07 2768static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2769 u8 *data, int len, int *dir)
2770{
fc34acd3 2771 struct net *net = sock_net(sk);
1da177e4
LT		 2772 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2773 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2774 struct xfrm_policy *xp;
2775 int nr;
2776
cb969f07 2777 switch (sk->sk_family) {
1da177e4
LT		 2778 case AF_INET:
2779 if (opt != IP_XFRM_POLICY) {
2780 *dir = -EOPNOTSUPP;
2781 return NULL;
2782 }
2783 break;
dfd56b8b 2784#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2785 case AF_INET6:
2786 if (opt != IPV6_XFRM_POLICY) {
2787 *dir = -EOPNOTSUPP;
2788 return NULL;
2789 }
2790 break;
2791#endif
2792 default:
2793 *dir = -EINVAL;
2794 return NULL;
2795 }
2796
2797 *dir = -EINVAL;
2798
2799 if (len < sizeof(*p) ||
2800 verify_newpolicy_info(p))
2801 return NULL;
2802
2803 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2804 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2805 return NULL;
2806
a4f1bac6
HX		 2807 if (p->dir > XFRM_POLICY_OUT)
2808 return NULL;
2809
2f09a4d5 2810 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2811 if (xp == NULL) {
2812 *dir = -ENOBUFS;
2813 return NULL;
2814 }
2815
2816 copy_from_user_policy(xp, p);
f7b6983f 2817 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2818 copy_templates(xp, ut, nr);
2819
2820 *dir = p->dir;
2821
2822 return xp;
2823}
2824
7deb2264
TG		 2825static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2826{
2827 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2828 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2829 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2830 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2831 + userpolicy_type_attrsize();
2832}
2833
1da177e4 2834static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2835 int dir, const struct km_event *c)
1da177e4
LT		 2836{
2837 struct xfrm_user_polexpire *upe;
d51d081d 2838 int hard = c->data.hard;
1d1e34dd
DM		 2839 struct nlmsghdr *nlh;
2840 int err;
1da177e4 2841
15e47304 2842 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2843 if (nlh == NULL)
2844 return -EMSGSIZE;
1da177e4 2845
7b67c857 2846 upe = nlmsg_data(nlh);
1da177e4 2847 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2848 err = copy_to_user_tmpl(xp, skb);
2849 if (!err)
2850 err = copy_to_user_sec_ctx(xp, 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
LT		 2859 upe->hard = !!hard;
2860
053c095a
JB		 2861 nlmsg_end(skb, nlh);
2862 return 0;
1da177e4
LT		 2863}
2864
214e005b 2865static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2866{
fc34acd3 2867 struct net *net = xp_net(xp);
1da177e4 2868 struct sk_buff *skb;
1da177e4 2869
7deb2264 2870 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2871 if (skb == NULL)
2872 return -ENOMEM;
2873
d51d081d 2874 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2875 BUG();
2876
21ee543e 2877 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2878}
2879
214e005b 2880static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2881{
1d1e34dd 2882 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 2883 struct net *net = xp_net(xp);
26b15dad 2884 struct xfrm_userpolicy_info *p;
0603eac0 2885 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2886 struct nlmsghdr *nlh;
2887 struct sk_buff *skb;
1d1e34dd 2888 int headlen, err;
0603eac0
HX		 2889
2890 headlen = sizeof(*p);
2891 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2892 len += nla_total_size(headlen);
0603eac0
HX		 2893 headlen = sizeof(*id);
2894 }
cfbfd45a 2895 len += userpolicy_type_attrsize();
295fae56 2896 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2897 len += NLMSG_ALIGN(headlen);
26b15dad 2898
7deb2264 2899 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2900 if (skb == NULL)
2901 return -ENOMEM;
26b15dad 2902
15e47304 2903 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2904 err = -EMSGSIZE;
79b8b7f4 2905 if (nlh == NULL)
1d1e34dd 2906 goto out_free_skb;
26b15dad 2907
7b67c857 2908 p = nlmsg_data(nlh);
0603eac0 2909 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2910 struct nlattr *attr;
2911
7b67c857 2912 id = nlmsg_data(nlh);
0603eac0
HX		 2913 memset(id, 0, sizeof(*id));
2914 id->dir = dir;
2915 if (c->data.byid)
2916 id->index = xp->index;
2917 else
2918 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2919
c0144bea 2920 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 2921 err = -EMSGSIZE;
c0144bea 2922 if (attr == NULL)
1d1e34dd 2923 goto out_free_skb;
c0144bea
TG		 2924
2925 p = nla_data(attr);
0603eac0 2926 }
26b15dad 2927
26b15dad 2928 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 2929 err = copy_to_user_tmpl(xp, skb);
2930 if (!err)
2931 err = copy_to_user_policy_type(xp->type, skb);
2932 if (!err)
2933 err = xfrm_mark_put(skb, &xp->mark);
2934 if (err)
2935 goto out_free_skb;
295fae56 2936
9825069d 2937 nlmsg_end(skb, nlh);
26b15dad 2938
21ee543e 2939 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 2940
1d1e34dd 2941out_free_skb:
26b15dad 2942 kfree_skb(skb);
1d1e34dd 2943 return err;
26b15dad
JHS		 2944}
2945
214e005b 2946static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 2947{
7067802e 2948 struct net *net = c->net;
26b15dad
JHS		 2949 struct nlmsghdr *nlh;
2950 struct sk_buff *skb;
1d1e34dd 2951 int err;
26b15dad 2952
7deb2264 2953 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2954 if (skb == NULL)
2955 return -ENOMEM;
26b15dad 2956
15e47304 2957 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 2958 err = -EMSGSIZE;
79b8b7f4 2959 if (nlh == NULL)
1d1e34dd
DM		 2960 goto out_free_skb;
2961 err = copy_to_user_policy_type(c->data.type, skb);
2962 if (err)
2963 goto out_free_skb;
26b15dad 2964
9825069d 2965 nlmsg_end(skb, nlh);
26b15dad 2966
21ee543e 2967 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 2968
1d1e34dd 2969out_free_skb:
26b15dad 2970 kfree_skb(skb);
1d1e34dd 2971 return err;
26b15dad
JHS		 2972}
2973
214e005b 2974static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2975{
2976
2977 switch (c->event) {
f60f6b8f
HX		 2978 case XFRM_MSG_NEWPOLICY:
2979 case XFRM_MSG_UPDPOLICY:
2980 case XFRM_MSG_DELPOLICY:
26b15dad 2981 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2982 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2983 return xfrm_notify_policy_flush(c);
f60f6b8f 2984 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2985 return xfrm_exp_policy_notify(xp, dir, c);
2986 default:
62db5cfd 2987 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2988 c->event);
26b15dad
JHS		 2989 }
2990
2991 return 0;
2992
2993}
2994
7deb2264
TG		 2995static inline size_t xfrm_report_msgsize(void)
2996{
2997 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2998}
2999
97a64b45
MN		 3000static int build_report(struct sk_buff *skb, u8 proto,
3001 struct xfrm_selector *sel, xfrm_address_t *addr)
3002{
3003 struct xfrm_user_report *ur;
3004 struct nlmsghdr *nlh;
97a64b45 3005
79b8b7f4
TG		 3006 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3007 if (nlh == NULL)
3008 return -EMSGSIZE;
97a64b45 3009
7b67c857 3010 ur = nlmsg_data(nlh);
97a64b45
MN		 3011 ur->proto = proto;
3012 memcpy(&ur->sel, sel, sizeof(ur->sel));
3013
1d1e34dd
DM		 3014 if (addr) {
3015 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3016 if (err) {
3017 nlmsg_cancel(skb, nlh);
3018 return err;
3019 }
3020 }
053c095a
JB		 3021 nlmsg_end(skb, nlh);
3022 return 0;
97a64b45
MN		 3023}
3024
db983c11
AD		 3025static int xfrm_send_report(struct net *net, u8 proto,
3026 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 3027{
3028 struct sk_buff *skb;
97a64b45 3029
7deb2264 3030 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 3031 if (skb == NULL)
3032 return -ENOMEM;
3033
3034 if (build_report(skb, proto, sel, addr) < 0)
3035 BUG();
3036
21ee543e 3037 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
97a64b45
MN		 3038}
3039
3a2dfbe8
MW		 3040static inline size_t xfrm_mapping_msgsize(void)
3041{
3042 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3043}
3044
3045static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3046 xfrm_address_t *new_saddr, __be16 new_sport)
3047{
3048 struct xfrm_user_mapping *um;
3049 struct nlmsghdr *nlh;
3050
3051 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3052 if (nlh == NULL)
3053 return -EMSGSIZE;
3054
3055 um = nlmsg_data(nlh);
3056
3057 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3058 um->id.spi = x->id.spi;
3059 um->id.family = x->props.family;
3060 um->id.proto = x->id.proto;
3061 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3062 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3063 um->new_sport = new_sport;
3064 um->old_sport = x->encap->encap_sport;
3065 um->reqid = x->props.reqid;
3066
053c095a
JB		 3067 nlmsg_end(skb, nlh);
3068 return 0;
3a2dfbe8
MW		 3069}
3070
3071static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3072 __be16 sport)
3073{
a6483b79 3074 struct net *net = xs_net(x);
3a2dfbe8
MW		 3075 struct sk_buff *skb;
3076
3077 if (x->id.proto != IPPROTO_ESP)
3078 return -EINVAL;
3079
3080 if (!x->encap)
3081 return -EINVAL;
3082
3083 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3084 if (skb == NULL)
3085 return -ENOMEM;
3086
3087 if (build_mapping(skb, x, ipaddr, sport) < 0)
3088 BUG();
3089
21ee543e 3090 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3a2dfbe8
MW		 3091}
3092
0f24558e
HG		 3093static bool xfrm_is_alive(const struct km_event *c)
3094{
3095 return (bool)xfrm_acquire_is_on(c->net);
3096}
3097
1da177e4
LT		 3098static struct xfrm_mgr netlink_mgr = {
3099 .id = "netlink",
3100 .notify = xfrm_send_state_notify,
3101 .acquire = xfrm_send_acquire,
3102 .compile_policy = xfrm_compile_policy,
3103 .notify_policy = xfrm_send_policy_notify,
97a64b45 3104 .report = xfrm_send_report,
5c79de6e 3105 .migrate = xfrm_send_migrate,
3a2dfbe8 3106 .new_mapping = xfrm_send_mapping,
0f24558e 3107 .is_alive = xfrm_is_alive,
1da177e4
LT		 3108};
3109
a6483b79 3110static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 3111{
be33690d 3112 struct sock *nlsk;
a31f2d17
PNA		 3113 struct netlink_kernel_cfg cfg = {
3114 .groups = XFRMNLGRP_MAX,
3115 .input = xfrm_netlink_rcv,
3116 };
be33690d 3117
9f00d977 3118 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3119 if (nlsk == NULL)
1da177e4 3120 return -ENOMEM;
d79d792e 3121 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3122 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3123 return 0;
3124}
3125
d79d792e 3126static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3127{
d79d792e
EB		 3128 struct net *net;
3129 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3130 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3131 synchronize_net();
3132 list_for_each_entry(net, net_exit_list, exit_list)
3133 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3134}
3135
a6483b79 3136static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3137 .init = xfrm_user_net_init,
3138 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3139};
3140
3141static int __init xfrm_user_init(void)
3142{
3143 int rv;
3144
3145 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3146
3147 rv = register_pernet_subsys(&xfrm_user_net_ops);
3148 if (rv < 0)
3149 return rv;
3150 rv = xfrm_register_km(&netlink_mgr);
3151 if (rv < 0)
3152 unregister_pernet_subsys(&xfrm_user_net_ops);
3153 return rv;
3154}
3155
3156static void __exit xfrm_user_exit(void)
3157{
3158 xfrm_unregister_km(&netlink_mgr);
3159 unregister_pernet_subsys(&xfrm_user_net_ops);
3160}
3161
1da177e4
LT		 3162module_init(xfrm_user_init);
3163module_exit(xfrm_user_exit);
3164MODULE_LICENSE("GPL");
4fdb3bb7 3165MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3166
Linux kernel - Deliverables
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