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Merge tag 'renesas-defconfig-fixes-for-v3.19' of git://git.kernel.org/pub/scm/linux...
[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
4447bb33
MW		 292static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
293 struct nlattr *rta)
294{
295 struct xfrm_algo *ualg;
296 struct xfrm_algo_auth *p;
297 struct xfrm_algo_desc *algo;
298
299 if (!rta)
300 return 0;
301
302 ualg = nla_data(rta);
303
304 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
305 if (!algo)
306 return -ENOSYS;
307 *props = algo->desc.sadb_alg_id;
308
309 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
310 if (!p)
311 return -ENOMEM;
312
313 strcpy(p->alg_name, algo->name);
314 p->alg_key_len = ualg->alg_key_len;
315 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
316 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
317
318 *algpp = p;
319 return 0;
320}
321
322static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
323 struct nlattr *rta)
324{
325 struct xfrm_algo_auth *p, *ualg;
326 struct xfrm_algo_desc *algo;
327
328 if (!rta)
329 return 0;
330
331 ualg = nla_data(rta);
332
333 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
334 if (!algo)
335 return -ENOSYS;
689f1c9d 336 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 337 return -EINVAL;
338 *props = algo->desc.sadb_alg_id;
339
340 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
341 if (!p)
342 return -ENOMEM;
343
344 strcpy(p->alg_name, algo->name);
345 if (!p->alg_trunc_len)
346 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
347
348 *algpp = p;
349 return 0;
350}
351
1a6509d9
HX		 352static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
353 struct nlattr *rta)
354{
355 struct xfrm_algo_aead *p, *ualg;
356 struct xfrm_algo_desc *algo;
357
358 if (!rta)
359 return 0;
360
361 ualg = nla_data(rta);
362
363 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
364 if (!algo)
365 return -ENOSYS;
366 *props = algo->desc.sadb_alg_id;
367
368 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
369 if (!p)
370 return -ENOMEM;
371
372 strcpy(p->alg_name, algo->name);
373 *algpp = p;
374 return 0;
375}
376
e2b19125
SK		 377static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
378 struct nlattr *rp)
379{
380 struct xfrm_replay_state_esn *up;
ecd79187 381 int ulen;
e2b19125
SK		 382
383 if (!replay_esn || !rp)
384 return 0;
385
386 up = nla_data(rp);
ecd79187 387 ulen = xfrm_replay_state_esn_len(up);
e2b19125 388
ecd79187 389 if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
e2b19125
SK		 390 return -EINVAL;
391
392 return 0;
393}
394
d8647b79
SK		 395static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
396 struct xfrm_replay_state_esn **preplay_esn,
397 struct nlattr *rta)
398{
399 struct xfrm_replay_state_esn *p, *pp, *up;
ecd79187 400 int klen, ulen;
d8647b79
SK		 401
402 if (!rta)
403 return 0;
404
405 up = nla_data(rta);
ecd79187
MK		 406 klen = xfrm_replay_state_esn_len(up);
407 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
d8647b79 408
ecd79187 409 p = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 410 if (!p)
411 return -ENOMEM;
412
ecd79187 413 pp = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 414 if (!pp) {
415 kfree(p);
416 return -ENOMEM;
417 }
418
ecd79187
MK		 419 memcpy(p, up, ulen);
420 memcpy(pp, up, ulen);
421
d8647b79
SK		 422 *replay_esn = p;
423 *preplay_esn = pp;
424
425 return 0;
426}
427
661697f7 428static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 429{
df71837d
TJ		 430 int len = 0;
431
432 if (xfrm_ctx) {
433 len += sizeof(struct xfrm_user_sec_ctx);
434 len += xfrm_ctx->ctx_len;
435 }
436 return len;
437}
438
1da177e4
LT		 439static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
440{
441 memcpy(&x->id, &p->id, sizeof(x->id));
442 memcpy(&x->sel, &p->sel, sizeof(x->sel));
443 memcpy(&x->lft, &p->lft, sizeof(x->lft));
444 x->props.mode = p->mode;
33fce60d
FD		 445 x->props.replay_window = min_t(unsigned int, p->replay_window,
446 sizeof(x->replay.bitmap) * 8);
1da177e4
LT		 447 x->props.reqid = p->reqid;
448 x->props.family = p->family;
54489c14 449 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 450 x->props.flags = p->flags;
196b0036 451
ccf9b3b8 452 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 453 x->sel.family = p->family;
1da177e4
LT		 454}
455
d51d081d
JHS		 456/*
457 * someday when pfkey also has support, we could have the code
458 * somehow made shareable and move it to xfrm_state.c - JHS
459 *
460*/
e3ac104d
MK		 461static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
462 int update_esn)
d51d081d 463{
5424f32e 464 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
e3ac104d 465 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
5424f32e
TG		 466 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
467 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
468 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 469
d8647b79
SK		 470 if (re) {
471 struct xfrm_replay_state_esn *replay_esn;
472 replay_esn = nla_data(re);
473 memcpy(x->replay_esn, replay_esn,
474 xfrm_replay_state_esn_len(replay_esn));
475 memcpy(x->preplay_esn, replay_esn,
476 xfrm_replay_state_esn_len(replay_esn));
477 }
478
d51d081d
JHS		 479 if (rp) {
480 struct xfrm_replay_state *replay;
5424f32e 481 replay = nla_data(rp);
d51d081d
JHS		 482 memcpy(&x->replay, replay, sizeof(*replay));
483 memcpy(&x->preplay, replay, sizeof(*replay));
484 }
485
486 if (lt) {
487 struct xfrm_lifetime_cur *ltime;
5424f32e 488 ltime = nla_data(lt);
d51d081d
JHS		 489 x->curlft.bytes = ltime->bytes;
490 x->curlft.packets = ltime->packets;
491 x->curlft.add_time = ltime->add_time;
492 x->curlft.use_time = ltime->use_time;
493 }
494
cf5cb79f 495 if (et)
5424f32e 496 x->replay_maxage = nla_get_u32(et);
d51d081d 497
cf5cb79f 498 if (rt)
5424f32e 499 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 500}
501
fc34acd3
AD		 502static struct xfrm_state *xfrm_state_construct(struct net *net,
503 struct xfrm_usersa_info *p,
5424f32e 504 struct nlattr **attrs,
1da177e4
LT		 505 int *errp)
506{
fc34acd3 507 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 508 int err = -ENOMEM;
509
510 if (!x)
511 goto error_no_put;
512
513 copy_from_user_state(x, p);
514
a947b0a9
ND		 515 if (attrs[XFRMA_SA_EXTRA_FLAGS])
516 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
517
1a6509d9
HX		 518 if ((err = attach_aead(&x->aead, &x->props.ealgo,
519 attrs[XFRMA_ALG_AEAD])))
520 goto error;
4447bb33
MW		 521 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
522 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 523 goto error;
4447bb33
MW		 524 if (!x->props.aalgo) {
525 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
526 attrs[XFRMA_ALG_AUTH])))
527 goto error;
528 }
1da177e4
LT		 529 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
530 xfrm_ealg_get_byname,
35a7aa08 531 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 532 goto error;
533 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
534 xfrm_calg_get_byname,
35a7aa08 535 attrs[XFRMA_ALG_COMP])))
1da177e4 536 goto error;
fd21150a
TG		 537
538 if (attrs[XFRMA_ENCAP]) {
539 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
540 sizeof(*x->encap), GFP_KERNEL);
541 if (x->encap == NULL)
542 goto error;
543 }
544
35d2856b
MW		 545 if (attrs[XFRMA_TFCPAD])
546 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
547
fd21150a
TG		 548 if (attrs[XFRMA_COADDR]) {
549 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
550 sizeof(*x->coaddr), GFP_KERNEL);
551 if (x->coaddr == NULL)
552 goto error;
553 }
554
6f26b61e
JHS		 555 xfrm_mark_get(attrs, &x->mark);
556
a454f0cc 557 err = __xfrm_init_state(x, false);
1da177e4
LT		 558 if (err)
559 goto error;
560
fd21150a
TG		 561 if (attrs[XFRMA_SEC_CTX] &&
562 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 563 goto error;
564
d8647b79
SK		 565 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
566 attrs[XFRMA_REPLAY_ESN_VAL])))
567 goto error;
568
1da177e4 569 x->km.seq = p->seq;
b27aeadb 570 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 571 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 572 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 573
9fdc4883
SK		 574 if ((err = xfrm_init_replay(x)))
575 goto error;
d51d081d 576
9fdc4883 577 /* override default values from above */
e3ac104d 578 xfrm_update_ae_params(x, attrs, 0);
1da177e4
LT		 579
580 return x;
581
582error:
583 x->km.state = XFRM_STATE_DEAD;
584 xfrm_state_put(x);
585error_no_put:
586 *errp = err;
587 return NULL;
588}
589
22e70050 590static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 591 struct nlattr **attrs)
1da177e4 592{
fc34acd3 593 struct net *net = sock_net(skb->sk);
7b67c857 594 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 595 struct xfrm_state *x;
596 int err;
26b15dad 597 struct km_event c;
1da177e4 598
35a7aa08 599 err = verify_newsa_info(p, attrs);
1da177e4
LT		 600 if (err)
601 return err;
602
fc34acd3 603 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 604 if (!x)
605 return err;
606
26b15dad 607 xfrm_state_hold(x);
1da177e4
LT		 608 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
609 err = xfrm_state_add(x);
610 else
611 err = xfrm_state_update(x);
612
2e71029e 613 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 614
1da177e4
LT		 615 if (err < 0) {
616 x->km.state = XFRM_STATE_DEAD;
21380b81 617 __xfrm_state_put(x);
7d6dfe1f 618 goto out;
1da177e4
LT		 619 }
620
26b15dad 621 c.seq = nlh->nlmsg_seq;
15e47304 622 c.portid = nlh->nlmsg_pid;
f60f6b8f 623 c.event = nlh->nlmsg_type;
26b15dad
JHS		 624
625 km_state_notify(x, &c);
7d6dfe1f 626out:
26b15dad 627 xfrm_state_put(x);
1da177e4
LT		 628 return err;
629}
630
fc34acd3
AD		 631static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
632 struct xfrm_usersa_id *p,
5424f32e 633 struct nlattr **attrs,
eb2971b6
MN		 634 int *errp)
635{
636 struct xfrm_state *x = NULL;
6f26b61e 637 struct xfrm_mark m;
eb2971b6 638 int err;
6f26b61e 639 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 640
641 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
642 err = -ESRCH;
6f26b61e 643 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 644 } else {
645 xfrm_address_t *saddr = NULL;
646
35a7aa08 647 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 648 if (!saddr) {
649 err = -EINVAL;
650 goto out;
651 }
652
9abbffee 653 err = -ESRCH;
6f26b61e
JHS		 654 x = xfrm_state_lookup_byaddr(net, mark,
655 &p->daddr, saddr,
221df1ed 656 p->proto, p->family);
eb2971b6
MN		 657 }
658
659 out:
660 if (!x && errp)
661 *errp = err;
662 return x;
663}
664
22e70050 665static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 666 struct nlattr **attrs)
1da177e4 667{
fc34acd3 668 struct net *net = sock_net(skb->sk);
1da177e4 669 struct xfrm_state *x;
eb2971b6 670 int err = -ESRCH;
26b15dad 671 struct km_event c;
7b67c857 672 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4 673
fc34acd3 674 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 675 if (x == NULL)
eb2971b6 676 return err;
1da177e4 677
6f68dc37 678 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 679 goto out;
680
1da177e4 681 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 682 err = -EPERM;
683 goto out;
1da177e4
LT		 684 }
685
26b15dad 686 err = xfrm_state_delete(x);
161a09e7 687
c8c05a8e
CZ		 688 if (err < 0)
689 goto out;
26b15dad
JHS		 690
691 c.seq = nlh->nlmsg_seq;
15e47304 692 c.portid = nlh->nlmsg_pid;
f60f6b8f 693 c.event = nlh->nlmsg_type;
26b15dad 694 km_state_notify(x, &c);
1da177e4 695
c8c05a8e 696out:
2e71029e 697 xfrm_audit_state_delete(x, err ? 0 : 1, true);
c8c05a8e 698 xfrm_state_put(x);
26b15dad 699 return err;
1da177e4
LT		 700}
701
702static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
703{
f778a636 704 memset(p, 0, sizeof(*p));
1da177e4
LT		 705 memcpy(&p->id, &x->id, sizeof(p->id));
706 memcpy(&p->sel, &x->sel, sizeof(p->sel));
707 memcpy(&p->lft, &x->lft, sizeof(p->lft));
708 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
709 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 710 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 711 p->mode = x->props.mode;
712 p->replay_window = x->props.replay_window;
713 p->reqid = x->props.reqid;
714 p->family = x->props.family;
715 p->flags = x->props.flags;
716 p->seq = x->km.seq;
717}
718
719struct xfrm_dump_info {
720 struct sk_buff *in_skb;
721 struct sk_buff *out_skb;
722 u32 nlmsg_seq;
723 u16 nlmsg_flags;
1da177e4
LT		 724};
725
c0144bea
TG		 726static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
727{
c0144bea
TG		 728 struct xfrm_user_sec_ctx *uctx;
729 struct nlattr *attr;
68325d3b 730 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 731
732 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
733 if (attr == NULL)
734 return -EMSGSIZE;
735
736 uctx = nla_data(attr);
737 uctx->exttype = XFRMA_SEC_CTX;
738 uctx->len = ctx_size;
739 uctx->ctx_doi = s->ctx_doi;
740 uctx->ctx_alg = s->ctx_alg;
741 uctx->ctx_len = s->ctx_len;
742 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
743
744 return 0;
745}
746
4447bb33
MW		 747static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
748{
749 struct xfrm_algo *algo;
750 struct nlattr *nla;
751
752 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
753 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
754 if (!nla)
755 return -EMSGSIZE;
756
757 algo = nla_data(nla);
4c87308b 758 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
4447bb33
MW		 759 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
760 algo->alg_key_len = auth->alg_key_len;
761
762 return 0;
763}
764
68325d3b
HX		 765/* Don't change this without updating xfrm_sa_len! */
766static int copy_to_user_state_extra(struct xfrm_state *x,
767 struct xfrm_usersa_info *p,
768 struct sk_buff *skb)
1da177e4 769{
1d1e34dd 770 int ret = 0;
d0fde795 771
1d1e34dd 772 copy_to_user_state(x, p);
68325d3b 773
a947b0a9
ND		 774 if (x->props.extra_flags) {
775 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
776 x->props.extra_flags);
777 if (ret)
778 goto out;
779 }
780
1d1e34dd
DM		 781 if (x->coaddr) {
782 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
783 if (ret)
784 goto out;
785 }
786 if (x->lastused) {
787 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
788 if (ret)
789 goto out;
790 }
791 if (x->aead) {
792 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
793 if (ret)
794 goto out;
795 }
796 if (x->aalg) {
797 ret = copy_to_user_auth(x->aalg, skb);
798 if (!ret)
799 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
800 xfrm_alg_auth_len(x->aalg), x->aalg);
801 if (ret)
802 goto out;
803 }
804 if (x->ealg) {
805 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
806 if (ret)
807 goto out;
808 }
809 if (x->calg) {
810 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
811 if (ret)
812 goto out;
813 }
814 if (x->encap) {
815 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
816 if (ret)
817 goto out;
818 }
819 if (x->tfcpad) {
820 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
821 if (ret)
822 goto out;
823 }
824 ret = xfrm_mark_put(skb, &x->mark);
825 if (ret)
826 goto out;
827 if (x->replay_esn) {
828 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
829 xfrm_replay_state_esn_len(x->replay_esn),
830 x->replay_esn);
831 if (ret)
832 goto out;
833 }
834 if (x->security)
835 ret = copy_sec_ctx(x->security, skb);
836out:
837 return ret;
68325d3b
HX		 838}
839
840static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
841{
842 struct xfrm_dump_info *sp = ptr;
843 struct sk_buff *in_skb = sp->in_skb;
844 struct sk_buff *skb = sp->out_skb;
845 struct xfrm_usersa_info *p;
846 struct nlmsghdr *nlh;
847 int err;
848
15e47304 849 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 850 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
851 if (nlh == NULL)
852 return -EMSGSIZE;
853
854 p = nlmsg_data(nlh);
855
856 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 857 if (err) {
858 nlmsg_cancel(skb, nlh);
859 return err;
860 }
9825069d 861 nlmsg_end(skb, nlh);
1da177e4 862 return 0;
1da177e4
LT		 863}
864
4c563f76
TT		 865static int xfrm_dump_sa_done(struct netlink_callback *cb)
866{
867 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 868 struct sock *sk = cb->skb->sk;
869 struct net *net = sock_net(sk);
870
871 xfrm_state_walk_done(walk, net);
4c563f76
TT		 872 return 0;
873}
874
d3623099 875static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
1da177e4
LT		 876static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
877{
fc34acd3 878 struct net *net = sock_net(skb->sk);
4c563f76 879 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 880 struct xfrm_dump_info info;
881
4c563f76
TT		 882 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
883 sizeof(cb->args) - sizeof(cb->args[0]));
884
1da177e4
LT		 885 info.in_skb = cb->skb;
886 info.out_skb = skb;
887 info.nlmsg_seq = cb->nlh->nlmsg_seq;
888 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 889
890 if (!cb->args[0]) {
d3623099 891 struct nlattr *attrs[XFRMA_MAX+1];
870a2df4 892 struct xfrm_address_filter *filter = NULL;
d3623099
ND		 893 u8 proto = 0;
894 int err;
895
4c563f76 896 cb->args[0] = 1;
d3623099
ND		 897
898 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX,
899 xfrma_policy);
900 if (err < 0)
901 return err;
902
870a2df4 903 if (attrs[XFRMA_ADDRESS_FILTER]) {
d3623099
ND		 904 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
905 if (filter == NULL)
906 return -ENOMEM;
907
870a2df4 908 memcpy(filter, nla_data(attrs[XFRMA_ADDRESS_FILTER]),
d3623099
ND		 909 sizeof(*filter));
910 }
911
912 if (attrs[XFRMA_PROTO])
913 proto = nla_get_u8(attrs[XFRMA_PROTO]);
914
915 xfrm_state_walk_init(walk, proto, filter);
4c563f76
TT		 916 }
917
fc34acd3 918 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 919
920 return skb->len;
921}
922
923static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
924 struct xfrm_state *x, u32 seq)
925{
926 struct xfrm_dump_info info;
927 struct sk_buff *skb;
864745d2 928 int err;
1da177e4 929
7deb2264 930 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 931 if (!skb)
932 return ERR_PTR(-ENOMEM);
933
1da177e4
LT		 934 info.in_skb = in_skb;
935 info.out_skb = skb;
936 info.nlmsg_seq = seq;
937 info.nlmsg_flags = 0;
1da177e4 938
864745d2
MK		 939 err = dump_one_state(x, 0, &info);
940 if (err) {
1da177e4 941 kfree_skb(skb);
864745d2 942 return ERR_PTR(err);
1da177e4
LT		 943 }
944
945 return skb;
946}
947
21ee543e
MK		 948/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
949 * Must be called with RCU read lock.
950 */
951static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
952 u32 pid, unsigned int group)
953{
954 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
955
956 if (nlsk)
957 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
958 else
959 return -1;
960}
961
7deb2264
TG		 962static inline size_t xfrm_spdinfo_msgsize(void)
963{
964 return NLMSG_ALIGN(4)
965 + nla_total_size(sizeof(struct xfrmu_spdinfo))
880a6fab
CG		 966 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
967 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
968 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
7deb2264
TG		 969}
970
e071041b 971static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 972 u32 portid, u32 seq, u32 flags)
ecfd6b18 973{
5a6d3416
JHS		 974 struct xfrmk_spdinfo si;
975 struct xfrmu_spdinfo spc;
976 struct xfrmu_spdhinfo sph;
880a6fab 977 struct xfrmu_spdhthresh spt4, spt6;
ecfd6b18 978 struct nlmsghdr *nlh;
1d1e34dd 979 int err;
ecfd6b18 980 u32 *f;
880a6fab 981 unsigned lseq;
ecfd6b18 982
15e47304 983 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 984 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 985 return -EMSGSIZE;
986
987 f = nlmsg_data(nlh);
988 *f = flags;
e071041b 989 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 990 spc.incnt = si.incnt;
991 spc.outcnt = si.outcnt;
992 spc.fwdcnt = si.fwdcnt;
993 spc.inscnt = si.inscnt;
994 spc.outscnt = si.outscnt;
995 spc.fwdscnt = si.fwdscnt;
996 sph.spdhcnt = si.spdhcnt;
997 sph.spdhmcnt = si.spdhmcnt;
998
880a6fab
CG		 999 do {
1000 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1001
1002 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1003 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1004 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1005 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1006 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1007
1d1e34dd
DM		 1008 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1009 if (!err)
1010 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
880a6fab
CG		 1011 if (!err)
1012 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1013 if (!err)
1014 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1d1e34dd
DM		 1015 if (err) {
1016 nlmsg_cancel(skb, nlh);
1017 return err;
1018 }
ecfd6b18
JHS		 1019
1020 return nlmsg_end(skb, nlh);
ecfd6b18
JHS		 1021}
1022
880a6fab
CG		 1023static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1024 struct nlattr **attrs)
1025{
1026 struct net *net = sock_net(skb->sk);
1027 struct xfrmu_spdhthresh *thresh4 = NULL;
1028 struct xfrmu_spdhthresh *thresh6 = NULL;
1029
1030 /* selector prefixlen thresholds to hash policies */
1031 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1032 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1033
1034 if (nla_len(rta) < sizeof(*thresh4))
1035 return -EINVAL;
1036 thresh4 = nla_data(rta);
1037 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1038 return -EINVAL;
1039 }
1040 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1041 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1042
1043 if (nla_len(rta) < sizeof(*thresh6))
1044 return -EINVAL;
1045 thresh6 = nla_data(rta);
1046 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1047 return -EINVAL;
1048 }
1049
1050 if (thresh4 || thresh6) {
1051 write_seqlock(&net->xfrm.policy_hthresh.lock);
1052 if (thresh4) {
1053 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1054 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1055 }
1056 if (thresh6) {
1057 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1058 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1059 }
1060 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1061
1062 xfrm_policy_hash_rebuild(net);
1063 }
1064
1065 return 0;
1066}
1067
ecfd6b18 1068static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1069 struct nlattr **attrs)
ecfd6b18 1070{
a6483b79 1071 struct net *net = sock_net(skb->sk);
ecfd6b18 1072 struct sk_buff *r_skb;
7b67c857 1073 u32 *flags = nlmsg_data(nlh);
15e47304 1074 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 1075 u32 seq = nlh->nlmsg_seq;
ecfd6b18 1076
7deb2264 1077 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 1078 if (r_skb == NULL)
1079 return -ENOMEM;
1080
15e47304 1081 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
ecfd6b18
JHS		 1082 BUG();
1083
15e47304 1084 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 1085}
1086
7deb2264
TG		 1087static inline size_t xfrm_sadinfo_msgsize(void)
1088{
1089 return NLMSG_ALIGN(4)
1090 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1091 + nla_total_size(4); /* XFRMA_SAD_CNT */
1092}
1093
e071041b 1094static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1095 u32 portid, u32 seq, u32 flags)
28d8909b 1096{
af11e316
JHS		 1097 struct xfrmk_sadinfo si;
1098 struct xfrmu_sadhinfo sh;
28d8909b 1099 struct nlmsghdr *nlh;
1d1e34dd 1100 int err;
28d8909b
JHS		 1101 u32 *f;
1102
15e47304 1103 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1104 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1105 return -EMSGSIZE;
1106
1107 f = nlmsg_data(nlh);
1108 *f = flags;
e071041b 1109 xfrm_sad_getinfo(net, &si);
28d8909b 1110
af11e316
JHS		 1111 sh.sadhmcnt = si.sadhmcnt;
1112 sh.sadhcnt = si.sadhcnt;
1113
1d1e34dd
DM		 1114 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1115 if (!err)
1116 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1117 if (err) {
1118 nlmsg_cancel(skb, nlh);
1119 return err;
1120 }
28d8909b
JHS		 1121
1122 return nlmsg_end(skb, nlh);
28d8909b
JHS		 1123}
1124
1125static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1126 struct nlattr **attrs)
28d8909b 1127{
a6483b79 1128 struct net *net = sock_net(skb->sk);
28d8909b 1129 struct sk_buff *r_skb;
7b67c857 1130 u32 *flags = nlmsg_data(nlh);
15e47304 1131 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1132 u32 seq = nlh->nlmsg_seq;
28d8909b 1133
7deb2264 1134 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1135 if (r_skb == NULL)
1136 return -ENOMEM;
1137
15e47304 1138 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
28d8909b
JHS		 1139 BUG();
1140
15e47304 1141 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1142}
1143
22e70050 1144static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1145 struct nlattr **attrs)
1da177e4 1146{
fc34acd3 1147 struct net *net = sock_net(skb->sk);
7b67c857 1148 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1149 struct xfrm_state *x;
1150 struct sk_buff *resp_skb;
eb2971b6 1151 int err = -ESRCH;
1da177e4 1152
fc34acd3 1153 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1154 if (x == NULL)
1155 goto out_noput;
1156
1157 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1158 if (IS_ERR(resp_skb)) {
1159 err = PTR_ERR(resp_skb);
1160 } else {
15e47304 1161 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1162 }
1163 xfrm_state_put(x);
1164out_noput:
1165 return err;
1166}
1167
22e70050 1168static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1169 struct nlattr **attrs)
1da177e4 1170{
fc34acd3 1171 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1172 struct xfrm_state *x;
1173 struct xfrm_userspi_info *p;
1174 struct sk_buff *resp_skb;
1175 xfrm_address_t *daddr;
1176 int family;
1177 int err;
6f26b61e
JHS		 1178 u32 mark;
1179 struct xfrm_mark m;
1da177e4 1180
7b67c857 1181 p = nlmsg_data(nlh);
776e9dd9 1182 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1183 if (err)
1184 goto out_noput;
1185
1186 family = p->info.family;
1187 daddr = &p->info.id.daddr;
1188
1189 x = NULL;
6f26b61e
JHS		 1190
1191 mark = xfrm_mark_get(attrs, &m);
1da177e4 1192 if (p->info.seq) {
6f26b61e 1193 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1194 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1195 xfrm_state_put(x);
1196 x = NULL;
1197 }
1198 }
1199
1200 if (!x)
6f26b61e 1201 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1202 p->info.id.proto, daddr,
1203 &p->info.saddr, 1,
1204 family);
1205 err = -ENOENT;
1206 if (x == NULL)
1207 goto out_noput;
1208
658b219e
HX		 1209 err = xfrm_alloc_spi(x, p->min, p->max);
1210 if (err)
1211 goto out;
1da177e4 1212
658b219e 1213 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1214 if (IS_ERR(resp_skb)) {
1215 err = PTR_ERR(resp_skb);
1216 goto out;
1217 }
1218
15e47304 1219 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1220
1221out:
1222 xfrm_state_put(x);
1223out_noput:
1224 return err;
1225}
1226
b798a9ed 1227static int verify_policy_dir(u8 dir)
1da177e4
LT		 1228{
1229 switch (dir) {
1230 case XFRM_POLICY_IN:
1231 case XFRM_POLICY_OUT:
1232 case XFRM_POLICY_FWD:
1233 break;
1234
1235 default:
1236 return -EINVAL;
3ff50b79 1237 }
1da177e4
LT		 1238
1239 return 0;
1240}
1241
b798a9ed 1242static int verify_policy_type(u8 type)
f7b6983f
MN		 1243{
1244 switch (type) {
1245 case XFRM_POLICY_TYPE_MAIN:
1246#ifdef CONFIG_XFRM_SUB_POLICY
1247 case XFRM_POLICY_TYPE_SUB:
1248#endif
1249 break;
1250
1251 default:
1252 return -EINVAL;
3ff50b79 1253 }
f7b6983f
MN		 1254
1255 return 0;
1256}
1257
1da177e4
LT		 1258static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1259{
e682adf0
FD		 1260 int ret;
1261
1da177e4
LT		 1262 switch (p->share) {
1263 case XFRM_SHARE_ANY:
1264 case XFRM_SHARE_SESSION:
1265 case XFRM_SHARE_USER:
1266 case XFRM_SHARE_UNIQUE:
1267 break;
1268
1269 default:
1270 return -EINVAL;
3ff50b79 1271 }
1da177e4
LT		 1272
1273 switch (p->action) {
1274 case XFRM_POLICY_ALLOW:
1275 case XFRM_POLICY_BLOCK:
1276 break;
1277
1278 default:
1279 return -EINVAL;
3ff50b79 1280 }
1da177e4
LT		 1281
1282 switch (p->sel.family) {
1283 case AF_INET:
1284 break;
1285
1286 case AF_INET6:
dfd56b8b 1287#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1288 break;
1289#else
1290 return -EAFNOSUPPORT;
1291#endif
1292
1293 default:
1294 return -EINVAL;
3ff50b79 1295 }
1da177e4 1296
e682adf0
FD		 1297 ret = verify_policy_dir(p->dir);
1298 if (ret)
1299 return ret;
1300 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1301 return -EINVAL;
1302
1303 return 0;
1da177e4
LT		 1304}
1305
5424f32e 1306static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1307{
5424f32e 1308 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1309 struct xfrm_user_sec_ctx *uctx;
1310
1311 if (!rt)
1312 return 0;
1313
5424f32e 1314 uctx = nla_data(rt);
52a4c640 1315 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1316}
1317
1da177e4
LT		 1318static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1319 int nr)
1320{
1321 int i;
1322
1323 xp->xfrm_nr = nr;
1324 for (i = 0; i < nr; i++, ut++) {
1325 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1326
1327 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1328 memcpy(&t->saddr, &ut->saddr,
1329 sizeof(xfrm_address_t));
1330 t->reqid = ut->reqid;
1331 t->mode = ut->mode;
1332 t->share = ut->share;
1333 t->optional = ut->optional;
1334 t->aalgos = ut->aalgos;
1335 t->ealgos = ut->ealgos;
1336 t->calgos = ut->calgos;
c5d18e98
HX		 1337 /* If all masks are ~0, then we allow all algorithms. */
1338 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1339 t->encap_family = ut->family;
1da177e4
LT		 1340 }
1341}
1342
b4ad86bf
DM		 1343static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1344{
1345 int i;
1346
1347 if (nr > XFRM_MAX_DEPTH)
1348 return -EINVAL;
1349
1350 for (i = 0; i < nr; i++) {
1351 /* We never validated the ut->family value, so many
1352 * applications simply leave it at zero. The check was
1353 * never made and ut->family was ignored because all
1354 * templates could be assumed to have the same family as
1355 * the policy itself. Now that we will have ipv4-in-ipv6
1356 * and ipv6-in-ipv4 tunnels, this is no longer true.
1357 */
1358 if (!ut[i].family)
1359 ut[i].family = family;
1360
1361 switch (ut[i].family) {
1362 case AF_INET:
1363 break;
dfd56b8b 1364#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1365 case AF_INET6:
1366 break;
1367#endif
1368 default:
1369 return -EINVAL;
3ff50b79 1370 }
b4ad86bf
DM		 1371 }
1372
1373 return 0;
1374}
1375
5424f32e 1376static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1377{
5424f32e 1378 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1379
1380 if (!rt) {
1381 pol->xfrm_nr = 0;
1382 } else {
5424f32e
TG		 1383 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1384 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1385 int err;
1da177e4 1386
b4ad86bf
DM		 1387 err = validate_tmpl(nr, utmpl, pol->family);
1388 if (err)
1389 return err;
1da177e4 1390
5424f32e 1391 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1392 }
1393 return 0;
1394}
1395
5424f32e 1396static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1397{
5424f32e 1398 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1399 struct xfrm_userpolicy_type *upt;
b798a9ed 1400 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1401 int err;
1402
1403 if (rt) {
5424f32e 1404 upt = nla_data(rt);
f7b6983f
MN		 1405 type = upt->type;
1406 }
1407
1408 err = verify_policy_type(type);
1409 if (err)
1410 return err;
1411
1412 *tp = type;
1413 return 0;
1414}
1415
1da177e4
LT		 1416static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1417{
1418 xp->priority = p->priority;
1419 xp->index = p->index;
1420 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1421 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1422 xp->action = p->action;
1423 xp->flags = p->flags;
1424 xp->family = p->sel.family;
1425 /* XXX xp->share = p->share; */
1426}
1427
1428static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1429{
7b789836 1430 memset(p, 0, sizeof(*p));
1da177e4
LT		 1431 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1432 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1433 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1434 p->priority = xp->priority;
1435 p->index = xp->index;
1436 p->sel.family = xp->family;
1437 p->dir = dir;
1438 p->action = xp->action;
1439 p->flags = xp->flags;
1440 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1441}
1442
fc34acd3 1443static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1444{
fc34acd3 1445 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1446 int err;
1447
1448 if (!xp) {
1449 *errp = -ENOMEM;
1450 return NULL;
1451 }
1452
1453 copy_from_user_policy(xp, p);
df71837d 1454
35a7aa08 1455 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1456 if (err)
1457 goto error;
1458
35a7aa08
TG		 1459 if (!(err = copy_from_user_tmpl(xp, attrs)))
1460 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1461 if (err)
1462 goto error;
1da177e4 1463
295fae56
JHS		 1464 xfrm_mark_get(attrs, &xp->mark);
1465
1da177e4 1466 return xp;
f7b6983f
MN		 1467 error:
1468 *errp = err;
12a169e7 1469 xp->walk.dead = 1;
64c31b3f 1470 xfrm_policy_destroy(xp);
f7b6983f 1471 return NULL;
1da177e4
LT		 1472}
1473
22e70050 1474static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1475 struct nlattr **attrs)
1da177e4 1476{
fc34acd3 1477 struct net *net = sock_net(skb->sk);
7b67c857 1478 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1479 struct xfrm_policy *xp;
26b15dad 1480 struct km_event c;
1da177e4
LT		 1481 int err;
1482 int excl;
1483
1484 err = verify_newpolicy_info(p);
df71837d
TJ		 1485 if (err)
1486 return err;
35a7aa08 1487 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1488 if (err)
1489 return err;
1490
fc34acd3 1491 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1492 if (!xp)
1493 return err;
1494
25985edc 1495 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1496 * Aha! this is anti-netlink really i.e more pfkey derived
1497 * in netlink excl is a flag and you wouldnt need
1498 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1499 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1500 err = xfrm_policy_insert(p->dir, xp, excl);
2e71029e 1501 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 1502
1da177e4 1503 if (err) {
03e1ad7b 1504 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1505 kfree(xp);
1506 return err;
1507 }
1508
f60f6b8f 1509 c.event = nlh->nlmsg_type;
26b15dad 1510 c.seq = nlh->nlmsg_seq;
15e47304 1511 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1512 km_policy_notify(xp, p->dir, &c);
1513
1da177e4
LT		 1514 xfrm_pol_put(xp);
1515
1516 return 0;
1517}
1518
1519static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1520{
1521 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1522 int i;
1523
1524 if (xp->xfrm_nr == 0)
1525 return 0;
1526
1527 for (i = 0; i < xp->xfrm_nr; i++) {
1528 struct xfrm_user_tmpl *up = &vec[i];
1529 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1530
1f86840f 1531 memset(up, 0, sizeof(*up));
1da177e4 1532 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1533 up->family = kp->encap_family;
1da177e4
LT		 1534 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1535 up->reqid = kp->reqid;
1536 up->mode = kp->mode;
1537 up->share = kp->share;
1538 up->optional = kp->optional;
1539 up->aalgos = kp->aalgos;
1540 up->ealgos = kp->ealgos;
1541 up->calgos = kp->calgos;
1542 }
df71837d 1543
c0144bea
TG		 1544 return nla_put(skb, XFRMA_TMPL,
1545 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1546}
1547
1548static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1549{
1550 if (x->security) {
1551 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1552 }
1553 return 0;
0d681623 1554}
df71837d 1555
0d681623
SH		 1556static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1557{
1d1e34dd 1558 if (xp->security)
0d681623 1559 return copy_sec_ctx(xp->security, skb);
0d681623 1560 return 0;
df71837d 1561}
cfbfd45a
TG		 1562static inline size_t userpolicy_type_attrsize(void)
1563{
1564#ifdef CONFIG_XFRM_SUB_POLICY
1565 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1566#else
1567 return 0;
1568#endif
1569}
df71837d 1570
f7b6983f 1571#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1572static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1573{
c0144bea
TG		 1574 struct xfrm_userpolicy_type upt = {
1575 .type = type,
1576 };
f7b6983f 1577
c0144bea 1578 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1579}
1580
1581#else
b798a9ed 1582static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1583{
1584 return 0;
1585}
1586#endif
1587
1da177e4
LT		 1588static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1589{
1590 struct xfrm_dump_info *sp = ptr;
1591 struct xfrm_userpolicy_info *p;
1592 struct sk_buff *in_skb = sp->in_skb;
1593 struct sk_buff *skb = sp->out_skb;
1594 struct nlmsghdr *nlh;
1d1e34dd 1595 int err;
1da177e4 1596
15e47304 1597 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1598 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1599 if (nlh == NULL)
1600 return -EMSGSIZE;
1da177e4 1601
7b67c857 1602 p = nlmsg_data(nlh);
1da177e4 1603 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1604 err = copy_to_user_tmpl(xp, skb);
1605 if (!err)
1606 err = copy_to_user_sec_ctx(xp, skb);
1607 if (!err)
1608 err = copy_to_user_policy_type(xp->type, skb);
1609 if (!err)
1610 err = xfrm_mark_put(skb, &xp->mark);
1611 if (err) {
1612 nlmsg_cancel(skb, nlh);
1613 return err;
1614 }
9825069d 1615 nlmsg_end(skb, nlh);
1da177e4 1616 return 0;
1da177e4
LT		 1617}
1618
4c563f76
TT		 1619static int xfrm_dump_policy_done(struct netlink_callback *cb)
1620{
1621 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
283bc9f3 1622 struct net *net = sock_net(cb->skb->sk);
4c563f76 1623
283bc9f3 1624 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1625 return 0;
1626}
1627
1da177e4
LT		 1628static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1629{
fc34acd3 1630 struct net *net = sock_net(skb->sk);
4c563f76 1631 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1632 struct xfrm_dump_info info;
1633
4c563f76
TT		 1634 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1635 sizeof(cb->args) - sizeof(cb->args[0]));
1636
1da177e4
LT		 1637 info.in_skb = cb->skb;
1638 info.out_skb = skb;
1639 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1640 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1641
1642 if (!cb->args[0]) {
1643 cb->args[0] = 1;
1644 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1645 }
1646
fc34acd3 1647 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1648
1649 return skb->len;
1650}
1651
1652static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1653 struct xfrm_policy *xp,
1654 int dir, u32 seq)
1655{
1656 struct xfrm_dump_info info;
1657 struct sk_buff *skb;
c2546372 1658 int err;
1da177e4 1659
7deb2264 1660 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1661 if (!skb)
1662 return ERR_PTR(-ENOMEM);
1663
1da177e4
LT		 1664 info.in_skb = in_skb;
1665 info.out_skb = skb;
1666 info.nlmsg_seq = seq;
1667 info.nlmsg_flags = 0;
1da177e4 1668
c2546372
MK		 1669 err = dump_one_policy(xp, dir, 0, &info);
1670 if (err) {
1da177e4 1671 kfree_skb(skb);
c2546372 1672 return ERR_PTR(err);
1da177e4
LT		 1673 }
1674
1675 return skb;
1676}
1677
22e70050 1678static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1679 struct nlattr **attrs)
1da177e4 1680{
fc34acd3 1681 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1682 struct xfrm_policy *xp;
1683 struct xfrm_userpolicy_id *p;
b798a9ed 1684 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1685 int err;
26b15dad 1686 struct km_event c;
1da177e4 1687 int delete;
295fae56
JHS		 1688 struct xfrm_mark m;
1689 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1690
7b67c857 1691 p = nlmsg_data(nlh);
1da177e4
LT		 1692 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1693
35a7aa08 1694 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1695 if (err)
1696 return err;
1697
1da177e4
LT		 1698 err = verify_policy_dir(p->dir);
1699 if (err)
1700 return err;
1701
1702 if (p->index)
295fae56 1703 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1704 else {
5424f32e 1705 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1706 struct xfrm_sec_ctx *ctx;
df71837d 1707
35a7aa08 1708 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1709 if (err)
1710 return err;
1711
2c8dd116 1712 ctx = NULL;
df71837d 1713 if (rt) {
5424f32e 1714 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1715
52a4c640 1716 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1717 if (err)
df71837d 1718 return err;
2c8dd116 1719 }
295fae56 1720 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1721 ctx, delete, &err);
03e1ad7b 1722 security_xfrm_policy_free(ctx);
df71837d 1723 }
1da177e4
LT		 1724 if (xp == NULL)
1725 return -ENOENT;
1726
1727 if (!delete) {
1728 struct sk_buff *resp_skb;
1729
1730 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1731 if (IS_ERR(resp_skb)) {
1732 err = PTR_ERR(resp_skb);
1733 } else {
a6483b79 1734 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1735 NETLINK_CB(skb).portid);
1da177e4 1736 }
26b15dad 1737 } else {
2e71029e 1738 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 1739
1740 if (err != 0)
c8c05a8e 1741 goto out;
13fcfbb0 1742
e7443892 1743 c.data.byid = p->index;
f60f6b8f 1744 c.event = nlh->nlmsg_type;
26b15dad 1745 c.seq = nlh->nlmsg_seq;
15e47304 1746 c.portid = nlh->nlmsg_pid;
26b15dad 1747 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1748 }
1749
c8c05a8e 1750out:
ef41aaa0 1751 xfrm_pol_put(xp);
e4c17216
PM		 1752 if (delete && err == 0)
1753 xfrm_garbage_collect(net);
1da177e4
LT		 1754 return err;
1755}
1756
22e70050 1757static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1758 struct nlattr **attrs)
1da177e4 1759{
fc34acd3 1760 struct net *net = sock_net(skb->sk);
26b15dad 1761 struct km_event c;
7b67c857 1762 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
4aa2e62c 1763 int err;
1da177e4 1764
2e71029e 1765 err = xfrm_state_flush(net, p->proto, true);
9e64cc95
JHS		 1766 if (err) {
1767 if (err == -ESRCH) /* empty table */
1768 return 0;
069c474e 1769 return err;
9e64cc95 1770 }
bf08867f 1771 c.data.proto = p->proto;
f60f6b8f 1772 c.event = nlh->nlmsg_type;
26b15dad 1773 c.seq = nlh->nlmsg_seq;
15e47304 1774 c.portid = nlh->nlmsg_pid;
7067802e 1775 c.net = net;
26b15dad
JHS		 1776 km_state_notify(NULL, &c);
1777
1da177e4
LT		 1778 return 0;
1779}
1780
d8647b79 1781static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1782{
d8647b79
SK		 1783 size_t replay_size = x->replay_esn ?
1784 xfrm_replay_state_esn_len(x->replay_esn) :
1785 sizeof(struct xfrm_replay_state);
1786
7deb2264 1787 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1788 + nla_total_size(replay_size)
7deb2264 1789 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1790 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1791 + nla_total_size(4) /* XFRM_AE_RTHR */
1792 + nla_total_size(4); /* XFRM_AE_ETHR */
1793}
d51d081d 1794
214e005b 1795static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1796{
1797 struct xfrm_aevent_id *id;
1798 struct nlmsghdr *nlh;
1d1e34dd 1799 int err;
d51d081d 1800
15e47304 1801 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1802 if (nlh == NULL)
1803 return -EMSGSIZE;
d51d081d 1804
7b67c857 1805 id = nlmsg_data(nlh);
9b7a787d 1806 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1807 id->sa_id.spi = x->id.spi;
1808 id->sa_id.family = x->props.family;
1809 id->sa_id.proto = x->id.proto;
9b7a787d 1810 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1811 id->reqid = x->props.reqid;
d51d081d
JHS		 1812 id->flags = c->data.aevent;
1813
d0fde795 1814 if (x->replay_esn) {
1d1e34dd
DM		 1815 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1816 xfrm_replay_state_esn_len(x->replay_esn),
1817 x->replay_esn);
d0fde795 1818 } else {
1d1e34dd
DM		 1819 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1820 &x->replay);
d0fde795 1821 }
1d1e34dd
DM		 1822 if (err)
1823 goto out_cancel;
1824 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1825 if (err)
1826 goto out_cancel;
d51d081d 1827
1d1e34dd
DM		 1828 if (id->flags & XFRM_AE_RTHR) {
1829 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1830 if (err)
1831 goto out_cancel;
1832 }
1833 if (id->flags & XFRM_AE_ETHR) {
1834 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1835 x->replay_maxage * 10 / HZ);
1836 if (err)
1837 goto out_cancel;
1838 }
1839 err = xfrm_mark_put(skb, &x->mark);
1840 if (err)
1841 goto out_cancel;
6f26b61e 1842
9825069d 1843 return nlmsg_end(skb, nlh);
d51d081d 1844
1d1e34dd 1845out_cancel:
9825069d 1846 nlmsg_cancel(skb, nlh);
1d1e34dd 1847 return err;
d51d081d
JHS		 1848}
1849
22e70050 1850static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1851 struct nlattr **attrs)
d51d081d 1852{
fc34acd3 1853 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1854 struct xfrm_state *x;
1855 struct sk_buff *r_skb;
1856 int err;
1857 struct km_event c;
6f26b61e
JHS		 1858 u32 mark;
1859 struct xfrm_mark m;
7b67c857 1860 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1861 struct xfrm_usersa_id *id = &p->sa_id;
1862
6f26b61e
JHS		 1863 mark = xfrm_mark_get(attrs, &m);
1864
1865 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1866 if (x == NULL)
d51d081d 1867 return -ESRCH;
d8647b79
SK		 1868
1869 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1870 if (r_skb == NULL) {
1871 xfrm_state_put(x);
1872 return -ENOMEM;
d51d081d
JHS		 1873 }
1874
1875 /*
1876 * XXX: is this lock really needed - none of the other
1877 * gets lock (the concern is things getting updated
1878 * while we are still reading) - jhs
1879 */
1880 spin_lock_bh(&x->lock);
1881 c.data.aevent = p->flags;
1882 c.seq = nlh->nlmsg_seq;
15e47304 1883 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1884
1885 if (build_aevent(r_skb, x, &c) < 0)
1886 BUG();
15e47304 1887 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1888 spin_unlock_bh(&x->lock);
1889 xfrm_state_put(x);
1890 return err;
1891}
1892
22e70050 1893static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1894 struct nlattr **attrs)
d51d081d 1895{
fc34acd3 1896 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1897 struct xfrm_state *x;
1898 struct km_event c;
02d0892f 1899 int err = -EINVAL;
6f26b61e
JHS		 1900 u32 mark = 0;
1901 struct xfrm_mark m;
7b67c857 1902 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1903 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1904 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1905 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d 1906
d8647b79 1907 if (!lt && !rp && !re)
d51d081d
JHS		 1908 return err;
1909
1910 /* pedantic mode - thou shalt sayeth replaceth */
1911 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1912 return err;
1913
6f26b61e
JHS		 1914 mark = xfrm_mark_get(attrs, &m);
1915
1916 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1917 if (x == NULL)
1918 return -ESRCH;
1919
1920 if (x->km.state != XFRM_STATE_VALID)
1921 goto out;
1922
4479ff76 1923 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 1924 if (err)
1925 goto out;
1926
d51d081d 1927 spin_lock_bh(&x->lock);
e3ac104d 1928 xfrm_update_ae_params(x, attrs, 1);
d51d081d 1929 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1930
1931 c.event = nlh->nlmsg_type;
1932 c.seq = nlh->nlmsg_seq;
15e47304 1933 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1934 c.data.aevent = XFRM_AE_CU;
1935 km_state_notify(x, &c);
1936 err = 0;
1937out:
1938 xfrm_state_put(x);
1939 return err;
1940}
1941
22e70050 1942static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1943 struct nlattr **attrs)
1da177e4 1944{
fc34acd3 1945 struct net *net = sock_net(skb->sk);
f7b6983f 1946 struct km_event c;
b798a9ed 1947 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1948 int err;
1949
35a7aa08 1950 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1951 if (err)
1952 return err;
26b15dad 1953
2e71029e 1954 err = xfrm_policy_flush(net, type, true);
2f1eb65f
JHS		 1955 if (err) {
1956 if (err == -ESRCH) /* empty table */
1957 return 0;
069c474e 1958 return err;
2f1eb65f
JHS		 1959 }
1960
f7b6983f 1961 c.data.type = type;
f60f6b8f 1962 c.event = nlh->nlmsg_type;
26b15dad 1963 c.seq = nlh->nlmsg_seq;
15e47304 1964 c.portid = nlh->nlmsg_pid;
7067802e 1965 c.net = net;
26b15dad 1966 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1967 return 0;
1968}
1969
22e70050 1970static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1971 struct nlattr **attrs)
6c5c8ca7 1972{
fc34acd3 1973 struct net *net = sock_net(skb->sk);
6c5c8ca7 1974 struct xfrm_policy *xp;
7b67c857 1975 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1976 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1977 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 1978 int err = -ENOENT;
295fae56
JHS		 1979 struct xfrm_mark m;
1980 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 1981
35a7aa08 1982 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1983 if (err)
1984 return err;
1985
c8bf4d04
TT		 1986 err = verify_policy_dir(p->dir);
1987 if (err)
1988 return err;
1989
6c5c8ca7 1990 if (p->index)
295fae56 1991 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 1992 else {
5424f32e 1993 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1994 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1995
35a7aa08 1996 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1997 if (err)
1998 return err;
1999
2c8dd116 2000 ctx = NULL;
6c5c8ca7 2001 if (rt) {
5424f32e 2002 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 2003
52a4c640 2004 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 2005 if (err)
6c5c8ca7 2006 return err;
2c8dd116 2007 }
295fae56 2008 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 2009 &p->sel, ctx, 0, &err);
03e1ad7b 2010 security_xfrm_policy_free(ctx);
6c5c8ca7 2011 }
6c5c8ca7 2012 if (xp == NULL)
ef41aaa0 2013 return -ENOENT;
03e1ad7b 2014
ea2dea9d 2015 if (unlikely(xp->walk.dead))
6c5c8ca7 2016 goto out;
6c5c8ca7 2017
6c5c8ca7
JHS		 2018 err = 0;
2019 if (up->hard) {
2020 xfrm_policy_delete(xp, p->dir);
2e71029e 2021 xfrm_audit_policy_delete(xp, 1, true);
6c5c8ca7
JHS		 2022 } else {
2023 // reset the timers here?
62db5cfd 2024 WARN(1, "Dont know what to do with soft policy expire\n");
6c5c8ca7 2025 }
c6bb8136 2026 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 2027
2028out:
2029 xfrm_pol_put(xp);
2030 return err;
2031}
2032
22e70050 2033static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2034 struct nlattr **attrs)
53bc6b4d 2035{
fc34acd3 2036 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 2037 struct xfrm_state *x;
2038 int err;
7b67c857 2039 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 2040 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 2041 struct xfrm_mark m;
928497f0 2042 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 2043
6f26b61e 2044 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 2045
3a765aa5 2046 err = -ENOENT;
53bc6b4d
JHS		 2047 if (x == NULL)
2048 return err;
2049
53bc6b4d 2050 spin_lock_bh(&x->lock);
3a765aa5 2051 err = -EINVAL;
53bc6b4d
JHS		 2052 if (x->km.state != XFRM_STATE_VALID)
2053 goto out;
c6bb8136 2054 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 2055
161a09e7 2056 if (ue->hard) {
53bc6b4d 2057 __xfrm_state_delete(x);
2e71029e 2058 xfrm_audit_state_delete(x, 1, true);
161a09e7 2059 }
3a765aa5 2060 err = 0;
53bc6b4d
JHS		 2061out:
2062 spin_unlock_bh(&x->lock);
2063 xfrm_state_put(x);
2064 return err;
2065}
2066
22e70050 2067static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2068 struct nlattr **attrs)
980ebd25 2069{
fc34acd3 2070 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2071 struct xfrm_policy *xp;
2072 struct xfrm_user_tmpl *ut;
2073 int i;
5424f32e 2074 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2075 struct xfrm_mark mark;
980ebd25 2076
7b67c857 2077 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2078 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2079 int err = -ENOMEM;
2080
2081 if (!x)
d8eb9307 2082 goto nomem;
980ebd25 2083
6f26b61e
JHS		 2084 xfrm_mark_get(attrs, &mark);
2085
980ebd25 2086 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 2087 if (err)
2088 goto bad_policy;
980ebd25
JHS		 2089
2090 /* build an XP */
fc34acd3 2091 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2092 if (!xp)
2093 goto free_state;
980ebd25
JHS		 2094
2095 memcpy(&x->id, &ua->id, sizeof(ua->id));
2096 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2097 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2098 xp->mark.m = x->mark.m = mark.m;
2099 xp->mark.v = x->mark.v = mark.v;
5424f32e 2100 ut = nla_data(rt);
980ebd25
JHS		 2101 /* extract the templates and for each call km_key */
2102 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2103 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2104 memcpy(&x->id, &t->id, sizeof(x->id));
2105 x->props.mode = t->mode;
2106 x->props.reqid = t->reqid;
2107 x->props.family = ut->family;
2108 t->aalgos = ua->aalgos;
2109 t->ealgos = ua->ealgos;
2110 t->calgos = ua->calgos;
2111 err = km_query(x, t, xp);
2112
2113 }
2114
2115 kfree(x);
2116 kfree(xp);
2117
2118 return 0;
d8eb9307
IJ		 2119
2120bad_policy:
62db5cfd 2121 WARN(1, "BAD policy passed\n");
d8eb9307
IJ		 2122free_state:
2123 kfree(x);
2124nomem:
2125 return err;
980ebd25
JHS		 2126}
2127
5c79de6e 2128#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2129static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2130 struct xfrm_kmaddress *k,
5424f32e 2131 struct nlattr **attrs, int *num)
5c79de6e 2132{
5424f32e 2133 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2134 struct xfrm_user_migrate *um;
2135 int i, num_migrate;
2136
13c1d189
AE		 2137 if (k != NULL) {
2138 struct xfrm_user_kmaddress *uk;
2139
2140 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2141 memcpy(&k->local, &uk->local, sizeof(k->local));
2142 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2143 k->family = uk->family;
2144 k->reserved = uk->reserved;
2145 }
2146
5424f32e
TG		 2147 um = nla_data(rt);
2148 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2149
2150 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2151 return -EINVAL;
2152
2153 for (i = 0; i < num_migrate; i++, um++, ma++) {
2154 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2155 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2156 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2157 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2158
2159 ma->proto = um->proto;
2160 ma->mode = um->mode;
2161 ma->reqid = um->reqid;
2162
2163 ma->old_family = um->old_family;
2164 ma->new_family = um->new_family;
2165 }
2166
2167 *num = i;
2168 return 0;
2169}
2170
2171static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2172 struct nlattr **attrs)
5c79de6e 2173{
7b67c857 2174 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2175 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2176 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2177 u8 type;
2178 int err;
2179 int n = 0;
8d549c4f 2180 struct net *net = sock_net(skb->sk);
5c79de6e 2181
35a7aa08 2182 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2183 return -EINVAL;
5c79de6e 2184
13c1d189
AE		 2185 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2186
5424f32e 2187 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2188 if (err)
2189 return err;
2190
13c1d189 2191 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2192 if (err)
2193 return err;
2194
2195 if (!n)
2196 return 0;
2197
8d549c4f 2198 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
5c79de6e
SS		 2199
2200 return 0;
2201}
2202#else
2203static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2204 struct nlattr **attrs)
5c79de6e
SS		 2205{
2206 return -ENOPROTOOPT;
2207}
2208#endif
2209
2210#ifdef CONFIG_XFRM_MIGRATE
183cad12 2211static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2212{
2213 struct xfrm_user_migrate um;
2214
2215 memset(&um, 0, sizeof(um));
2216 um.proto = m->proto;
2217 um.mode = m->mode;
2218 um.reqid = m->reqid;
2219 um.old_family = m->old_family;
2220 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2221 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2222 um.new_family = m->new_family;
2223 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2224 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2225
c0144bea 2226 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2227}
2228
183cad12 2229static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2230{
2231 struct xfrm_user_kmaddress uk;
2232
2233 memset(&uk, 0, sizeof(uk));
2234 uk.family = k->family;
2235 uk.reserved = k->reserved;
2236 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2237 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2238
2239 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2240}
2241
2242static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 2243{
2244 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 2245 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2246 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2247 + userpolicy_type_attrsize();
7deb2264
TG		 2248}
2249
183cad12
DM		 2250static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2251 int num_migrate, const struct xfrm_kmaddress *k,
2252 const struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e 2253{
183cad12 2254 const struct xfrm_migrate *mp;
5c79de6e
SS		 2255 struct xfrm_userpolicy_id *pol_id;
2256 struct nlmsghdr *nlh;
1d1e34dd 2257 int i, err;
5c79de6e 2258
79b8b7f4
TG		 2259 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2260 if (nlh == NULL)
2261 return -EMSGSIZE;
5c79de6e 2262
7b67c857 2263 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2264 /* copy data from selector, dir, and type to the pol_id */
2265 memset(pol_id, 0, sizeof(*pol_id));
2266 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2267 pol_id->dir = dir;
2268
1d1e34dd
DM		 2269 if (k != NULL) {
2270 err = copy_to_user_kmaddress(k, skb);
2271 if (err)
2272 goto out_cancel;
2273 }
2274 err = copy_to_user_policy_type(type, skb);
2275 if (err)
2276 goto out_cancel;
5c79de6e 2277 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2278 err = copy_to_user_migrate(mp, skb);
2279 if (err)
2280 goto out_cancel;
5c79de6e
SS		 2281 }
2282
9825069d 2283 return nlmsg_end(skb, nlh);
1d1e34dd
DM		 2284
2285out_cancel:
9825069d 2286 nlmsg_cancel(skb, nlh);
1d1e34dd 2287 return err;
5c79de6e
SS		 2288}
2289
183cad12
DM		 2290static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2291 const struct xfrm_migrate *m, int num_migrate,
2292 const struct xfrm_kmaddress *k)
5c79de6e 2293{
a6483b79 2294 struct net *net = &init_net;
5c79de6e 2295 struct sk_buff *skb;
5c79de6e 2296
13c1d189 2297 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2298 if (skb == NULL)
2299 return -ENOMEM;
2300
2301 /* build migrate */
13c1d189 2302 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2303 BUG();
2304
21ee543e 2305 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
5c79de6e
SS		 2306}
2307#else
183cad12
DM		 2308static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2309 const struct xfrm_migrate *m, int num_migrate,
2310 const struct xfrm_kmaddress *k)
5c79de6e
SS		 2311{
2312 return -ENOPROTOOPT;
2313}
2314#endif
d51d081d 2315
a7bd9a45 2316#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2317
2318static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2319 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2320 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2321 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2322 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2323 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2324 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2325 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2326 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2327 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2328 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2329 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2330 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2331 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2332 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2333 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2334 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2335 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2336 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45 2337 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
880a6fab 2338 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
a7bd9a45 2339 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2340};
2341
492b558b
TG		 2342#undef XMSGSIZE
2343
cf5cb79f 2344static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2345 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2346 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2347 [XFRMA_LASTUSED] = { .type = NLA_U64},
2348 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2349 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2350 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2351 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2352 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2353 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2354 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2355 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2356 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2357 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2358 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2359 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2360 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2361 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2362 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2363 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2364 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2365 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2366 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2367 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2368 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
d3623099 2369 [XFRMA_PROTO] = { .type = NLA_U8 },
870a2df4 2370 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
cf5cb79f
TG		 2371};
2372
880a6fab
CG		 2373static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2374 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2375 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2376};
2377
05600a79 2378static const struct xfrm_link {
5424f32e 2379 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2380 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2381 int (*done)(struct netlink_callback *);
880a6fab
CG		 2382 const struct nla_policy *nla_pol;
2383 int nla_max;
492b558b
TG		 2384} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2385 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2386 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2387 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2388 .dump = xfrm_dump_sa,
2389 .done = xfrm_dump_sa_done },
492b558b
TG		 2390 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2391 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2392 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2393 .dump = xfrm_dump_policy,
2394 .done = xfrm_dump_policy_done },
492b558b 2395 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2396 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2397 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2398 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2399 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2400 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2401 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2402 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2403 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2404 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2405 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2406 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
880a6fab
CG		 2407 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2408 .nla_pol = xfrma_spd_policy,
2409 .nla_max = XFRMA_SPD_MAX },
ecfd6b18 2410 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2411};
2412
1d00a4eb 2413static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2414{
a6483b79 2415 struct net *net = sock_net(skb->sk);
35a7aa08 2416 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2417 const struct xfrm_link *link;
a7bd9a45 2418 int type, err;
1da177e4 2419
1da177e4 2420 type = nlh->nlmsg_type;
1da177e4 2421 if (type > XFRM_MSG_MAX)
1d00a4eb 2422 return -EINVAL;
1da177e4
LT		 2423
2424 type -= XFRM_MSG_BASE;
2425 link = &xfrm_dispatch[type];
2426
2427 /* All operations require privileges, even GET */
90f62cf3 2428 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 2429 return -EPERM;
1da177e4 2430
492b558b
TG		 2431 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2432 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2433 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2434 if (link->dump == NULL)
1d00a4eb 2435 return -EINVAL;
88fc2c84 2436
80d326fa
PNA		 2437 {
2438 struct netlink_dump_control c = {
2439 .dump = link->dump,
2440 .done = link->done,
2441 };
2442 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2443 }
1da177e4
LT		 2444 }
2445
880a6fab
CG		 2446 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2447 link->nla_max ? : XFRMA_MAX,
2448 link->nla_pol ? : xfrma_policy);
a7bd9a45
TG		 2449 if (err < 0)
2450 return err;
1da177e4
LT		 2451
2452 if (link->doit == NULL)
1d00a4eb 2453 return -EINVAL;
1da177e4 2454
5424f32e 2455 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2456}
2457
cd40b7d3 2458static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2459{
283bc9f3
FD		 2460 struct net *net = sock_net(skb->sk);
2461
2462 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2463 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2464 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2465}
2466
7deb2264
TG		 2467static inline size_t xfrm_expire_msgsize(void)
2468{
6f26b61e
JHS		 2469 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2470 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2471}
2472
214e005b 2473static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2474{
2475 struct xfrm_user_expire *ue;
2476 struct nlmsghdr *nlh;
1d1e34dd 2477 int err;
1da177e4 2478
15e47304 2479 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2480 if (nlh == NULL)
2481 return -EMSGSIZE;
1da177e4 2482
7b67c857 2483 ue = nlmsg_data(nlh);
1da177e4 2484 copy_to_user_state(x, &ue->state);
d51d081d 2485 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2486
1d1e34dd
DM		 2487 err = xfrm_mark_put(skb, &x->mark);
2488 if (err)
2489 return err;
6f26b61e 2490
9825069d 2491 return nlmsg_end(skb, nlh);
1da177e4
LT		 2492}
2493
214e005b 2494static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2495{
fc34acd3 2496 struct net *net = xs_net(x);
1da177e4
LT		 2497 struct sk_buff *skb;
2498
7deb2264 2499 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2500 if (skb == NULL)
2501 return -ENOMEM;
2502
6f26b61e
JHS		 2503 if (build_expire(skb, x, c) < 0) {
2504 kfree_skb(skb);
2505 return -EMSGSIZE;
2506 }
1da177e4 2507
21ee543e 2508 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2509}
2510
214e005b 2511static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2512{
fc34acd3 2513 struct net *net = xs_net(x);
d51d081d 2514 struct sk_buff *skb;
d51d081d 2515
d8647b79 2516 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2517 if (skb == NULL)
2518 return -ENOMEM;
2519
2520 if (build_aevent(skb, x, c) < 0)
2521 BUG();
2522
21ee543e 2523 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
d51d081d
JHS		 2524}
2525
214e005b 2526static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2527{
7067802e 2528 struct net *net = c->net;
26b15dad
JHS		 2529 struct xfrm_usersa_flush *p;
2530 struct nlmsghdr *nlh;
2531 struct sk_buff *skb;
7deb2264 2532 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2533
7deb2264 2534 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2535 if (skb == NULL)
2536 return -ENOMEM;
26b15dad 2537
15e47304 2538 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2539 if (nlh == NULL) {
2540 kfree_skb(skb);
2541 return -EMSGSIZE;
2542 }
26b15dad 2543
7b67c857 2544 p = nlmsg_data(nlh);
bf08867f 2545 p->proto = c->data.proto;
26b15dad 2546
9825069d 2547 nlmsg_end(skb, nlh);
26b15dad 2548
21ee543e 2549 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad
JHS		 2550}
2551
7deb2264 2552static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2553{
7deb2264 2554 size_t l = 0;
1a6509d9
HX		 2555 if (x->aead)
2556 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2557 if (x->aalg) {
2558 l += nla_total_size(sizeof(struct xfrm_algo) +
2559 (x->aalg->alg_key_len + 7) / 8);
2560 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2561 }
26b15dad 2562 if (x->ealg)
0f99be0d 2563 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2564 if (x->calg)
7deb2264 2565 l += nla_total_size(sizeof(*x->calg));
26b15dad 2566 if (x->encap)
7deb2264 2567 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2568 if (x->tfcpad)
2569 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2570 if (x->replay_esn)
2571 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
68325d3b
HX		 2572 if (x->security)
2573 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2574 x->security->ctx_len);
2575 if (x->coaddr)
2576 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2577 if (x->props.extra_flags)
2578 l += nla_total_size(sizeof(x->props.extra_flags));
68325d3b 2579
d26f3984
HX		 2580 /* Must count x->lastused as it may become non-zero behind our back. */
2581 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2582
2583 return l;
2584}
2585
214e005b 2586static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2587{
fc34acd3 2588 struct net *net = xs_net(x);
26b15dad 2589 struct xfrm_usersa_info *p;
0603eac0 2590 struct xfrm_usersa_id *id;
26b15dad
JHS		 2591 struct nlmsghdr *nlh;
2592 struct sk_buff *skb;
26b15dad 2593 int len = xfrm_sa_len(x);
1d1e34dd 2594 int headlen, err;
0603eac0
HX		 2595
2596 headlen = sizeof(*p);
2597 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2598 len += nla_total_size(headlen);
0603eac0 2599 headlen = sizeof(*id);
6f26b61e 2600 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2601 }
7deb2264 2602 len += NLMSG_ALIGN(headlen);
26b15dad 2603
7deb2264 2604 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2605 if (skb == NULL)
2606 return -ENOMEM;
26b15dad 2607
15e47304 2608 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2609 err = -EMSGSIZE;
79b8b7f4 2610 if (nlh == NULL)
1d1e34dd 2611 goto out_free_skb;
26b15dad 2612
7b67c857 2613 p = nlmsg_data(nlh);
0603eac0 2614 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2615 struct nlattr *attr;
2616
7b67c857 2617 id = nlmsg_data(nlh);
0603eac0
HX		 2618 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2619 id->spi = x->id.spi;
2620 id->family = x->props.family;
2621 id->proto = x->id.proto;
2622
c0144bea 2623 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2624 err = -EMSGSIZE;
c0144bea 2625 if (attr == NULL)
1d1e34dd 2626 goto out_free_skb;
c0144bea
TG		 2627
2628 p = nla_data(attr);
0603eac0 2629 }
1d1e34dd
DM		 2630 err = copy_to_user_state_extra(x, p, skb);
2631 if (err)
2632 goto out_free_skb;
26b15dad 2633
9825069d 2634 nlmsg_end(skb, nlh);
26b15dad 2635
21ee543e 2636 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad 2637
1d1e34dd 2638out_free_skb:
26b15dad 2639 kfree_skb(skb);
1d1e34dd 2640 return err;
26b15dad
JHS		 2641}
2642
214e005b 2643static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2644{
2645
2646 switch (c->event) {
f60f6b8f 2647 case XFRM_MSG_EXPIRE:
26b15dad 2648 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2649 case XFRM_MSG_NEWAE:
2650 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2651 case XFRM_MSG_DELSA:
2652 case XFRM_MSG_UPDSA:
2653 case XFRM_MSG_NEWSA:
26b15dad 2654 return xfrm_notify_sa(x, c);
f60f6b8f 2655 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2656 return xfrm_notify_sa_flush(c);
2657 default:
62db5cfd 2658 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2659 c->event);
2660 break;
26b15dad
JHS		 2661 }
2662
2663 return 0;
2664
2665}
2666
7deb2264
TG		 2667static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2668 struct xfrm_policy *xp)
2669{
2670 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2671 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2672 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2673 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2674 + userpolicy_type_attrsize();
2675}
2676
1da177e4 2677static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2678 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2679{
1d1e34dd 2680 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2681 struct xfrm_user_acquire *ua;
2682 struct nlmsghdr *nlh;
1d1e34dd 2683 int err;
1da177e4 2684
79b8b7f4
TG		 2685 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2686 if (nlh == NULL)
2687 return -EMSGSIZE;
1da177e4 2688
7b67c857 2689 ua = nlmsg_data(nlh);
1da177e4
LT		 2690 memcpy(&ua->id, &x->id, sizeof(ua->id));
2691 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2692 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2693 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2694 ua->aalgos = xt->aalgos;
2695 ua->ealgos = xt->ealgos;
2696 ua->calgos = xt->calgos;
2697 ua->seq = x->km.seq = seq;
2698
1d1e34dd
DM		 2699 err = copy_to_user_tmpl(xp, skb);
2700 if (!err)
2701 err = copy_to_user_state_sec_ctx(x, skb);
2702 if (!err)
2703 err = copy_to_user_policy_type(xp->type, skb);
2704 if (!err)
2705 err = xfrm_mark_put(skb, &xp->mark);
2706 if (err) {
2707 nlmsg_cancel(skb, nlh);
2708 return err;
2709 }
1da177e4 2710
9825069d 2711 return nlmsg_end(skb, nlh);
1da177e4
LT		 2712}
2713
2714static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2715 struct xfrm_policy *xp)
1da177e4 2716{
a6483b79 2717 struct net *net = xs_net(x);
1da177e4 2718 struct sk_buff *skb;
1da177e4 2719
7deb2264 2720 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2721 if (skb == NULL)
2722 return -ENOMEM;
2723
65e0736b 2724 if (build_acquire(skb, x, xt, xp) < 0)
1da177e4
LT		 2725 BUG();
2726
21ee543e 2727 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
1da177e4
LT		 2728}
2729
2730/* User gives us xfrm_user_policy_info followed by an array of 0
2731 * or more templates.
2732 */
cb969f07 2733static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2734 u8 *data, int len, int *dir)
2735{
fc34acd3 2736 struct net *net = sock_net(sk);
1da177e4
LT		 2737 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2738 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2739 struct xfrm_policy *xp;
2740 int nr;
2741
cb969f07 2742 switch (sk->sk_family) {
1da177e4
LT		 2743 case AF_INET:
2744 if (opt != IP_XFRM_POLICY) {
2745 *dir = -EOPNOTSUPP;
2746 return NULL;
2747 }
2748 break;
dfd56b8b 2749#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2750 case AF_INET6:
2751 if (opt != IPV6_XFRM_POLICY) {
2752 *dir = -EOPNOTSUPP;
2753 return NULL;
2754 }
2755 break;
2756#endif
2757 default:
2758 *dir = -EINVAL;
2759 return NULL;
2760 }
2761
2762 *dir = -EINVAL;
2763
2764 if (len < sizeof(*p) ||
2765 verify_newpolicy_info(p))
2766 return NULL;
2767
2768 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2769 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2770 return NULL;
2771
a4f1bac6
HX		 2772 if (p->dir > XFRM_POLICY_OUT)
2773 return NULL;
2774
2f09a4d5 2775 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2776 if (xp == NULL) {
2777 *dir = -ENOBUFS;
2778 return NULL;
2779 }
2780
2781 copy_from_user_policy(xp, p);
f7b6983f 2782 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2783 copy_templates(xp, ut, nr);
2784
2785 *dir = p->dir;
2786
2787 return xp;
2788}
2789
7deb2264
TG		 2790static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2791{
2792 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2793 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2794 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2795 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2796 + userpolicy_type_attrsize();
2797}
2798
1da177e4 2799static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2800 int dir, const struct km_event *c)
1da177e4
LT		 2801{
2802 struct xfrm_user_polexpire *upe;
d51d081d 2803 int hard = c->data.hard;
1d1e34dd
DM		 2804 struct nlmsghdr *nlh;
2805 int err;
1da177e4 2806
15e47304 2807 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2808 if (nlh == NULL)
2809 return -EMSGSIZE;
1da177e4 2810
7b67c857 2811 upe = nlmsg_data(nlh);
1da177e4 2812 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2813 err = copy_to_user_tmpl(xp, skb);
2814 if (!err)
2815 err = copy_to_user_sec_ctx(xp, skb);
2816 if (!err)
2817 err = copy_to_user_policy_type(xp->type, skb);
2818 if (!err)
2819 err = xfrm_mark_put(skb, &xp->mark);
2820 if (err) {
2821 nlmsg_cancel(skb, nlh);
2822 return err;
2823 }
1da177e4
LT		 2824 upe->hard = !!hard;
2825
9825069d 2826 return nlmsg_end(skb, nlh);
1da177e4
LT		 2827}
2828
214e005b 2829static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2830{
fc34acd3 2831 struct net *net = xp_net(xp);
1da177e4 2832 struct sk_buff *skb;
1da177e4 2833
7deb2264 2834 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2835 if (skb == NULL)
2836 return -ENOMEM;
2837
d51d081d 2838 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2839 BUG();
2840
21ee543e 2841 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2842}
2843
214e005b 2844static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2845{
1d1e34dd 2846 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 2847 struct net *net = xp_net(xp);
26b15dad 2848 struct xfrm_userpolicy_info *p;
0603eac0 2849 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2850 struct nlmsghdr *nlh;
2851 struct sk_buff *skb;
1d1e34dd 2852 int headlen, err;
0603eac0
HX		 2853
2854 headlen = sizeof(*p);
2855 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2856 len += nla_total_size(headlen);
0603eac0
HX		 2857 headlen = sizeof(*id);
2858 }
cfbfd45a 2859 len += userpolicy_type_attrsize();
295fae56 2860 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2861 len += NLMSG_ALIGN(headlen);
26b15dad 2862
7deb2264 2863 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2864 if (skb == NULL)
2865 return -ENOMEM;
26b15dad 2866
15e47304 2867 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2868 err = -EMSGSIZE;
79b8b7f4 2869 if (nlh == NULL)
1d1e34dd 2870 goto out_free_skb;
26b15dad 2871
7b67c857 2872 p = nlmsg_data(nlh);
0603eac0 2873 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2874 struct nlattr *attr;
2875
7b67c857 2876 id = nlmsg_data(nlh);
0603eac0
HX		 2877 memset(id, 0, sizeof(*id));
2878 id->dir = dir;
2879 if (c->data.byid)
2880 id->index = xp->index;
2881 else
2882 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2883
c0144bea 2884 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 2885 err = -EMSGSIZE;
c0144bea 2886 if (attr == NULL)
1d1e34dd 2887 goto out_free_skb;
c0144bea
TG		 2888
2889 p = nla_data(attr);
0603eac0 2890 }
26b15dad 2891
26b15dad 2892 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 2893 err = copy_to_user_tmpl(xp, skb);
2894 if (!err)
2895 err = copy_to_user_policy_type(xp->type, skb);
2896 if (!err)
2897 err = xfrm_mark_put(skb, &xp->mark);
2898 if (err)
2899 goto out_free_skb;
295fae56 2900
9825069d 2901 nlmsg_end(skb, nlh);
26b15dad 2902
21ee543e 2903 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 2904
1d1e34dd 2905out_free_skb:
26b15dad 2906 kfree_skb(skb);
1d1e34dd 2907 return err;
26b15dad
JHS		 2908}
2909
214e005b 2910static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 2911{
7067802e 2912 struct net *net = c->net;
26b15dad
JHS		 2913 struct nlmsghdr *nlh;
2914 struct sk_buff *skb;
1d1e34dd 2915 int err;
26b15dad 2916
7deb2264 2917 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2918 if (skb == NULL)
2919 return -ENOMEM;
26b15dad 2920
15e47304 2921 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 2922 err = -EMSGSIZE;
79b8b7f4 2923 if (nlh == NULL)
1d1e34dd
DM		 2924 goto out_free_skb;
2925 err = copy_to_user_policy_type(c->data.type, skb);
2926 if (err)
2927 goto out_free_skb;
26b15dad 2928
9825069d 2929 nlmsg_end(skb, nlh);
26b15dad 2930
21ee543e 2931 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 2932
1d1e34dd 2933out_free_skb:
26b15dad 2934 kfree_skb(skb);
1d1e34dd 2935 return err;
26b15dad
JHS		 2936}
2937
214e005b 2938static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2939{
2940
2941 switch (c->event) {
f60f6b8f
HX		 2942 case XFRM_MSG_NEWPOLICY:
2943 case XFRM_MSG_UPDPOLICY:
2944 case XFRM_MSG_DELPOLICY:
26b15dad 2945 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2946 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2947 return xfrm_notify_policy_flush(c);
f60f6b8f 2948 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2949 return xfrm_exp_policy_notify(xp, dir, c);
2950 default:
62db5cfd 2951 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2952 c->event);
26b15dad
JHS		 2953 }
2954
2955 return 0;
2956
2957}
2958
7deb2264
TG		 2959static inline size_t xfrm_report_msgsize(void)
2960{
2961 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2962}
2963
97a64b45
MN		 2964static int build_report(struct sk_buff *skb, u8 proto,
2965 struct xfrm_selector *sel, xfrm_address_t *addr)
2966{
2967 struct xfrm_user_report *ur;
2968 struct nlmsghdr *nlh;
97a64b45 2969
79b8b7f4
TG		 2970 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2971 if (nlh == NULL)
2972 return -EMSGSIZE;
97a64b45 2973
7b67c857 2974 ur = nlmsg_data(nlh);
97a64b45
MN		 2975 ur->proto = proto;
2976 memcpy(&ur->sel, sel, sizeof(ur->sel));
2977
1d1e34dd
DM		 2978 if (addr) {
2979 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2980 if (err) {
2981 nlmsg_cancel(skb, nlh);
2982 return err;
2983 }
2984 }
9825069d 2985 return nlmsg_end(skb, nlh);
97a64b45
MN		 2986}
2987
db983c11
AD		 2988static int xfrm_send_report(struct net *net, u8 proto,
2989 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2990{
2991 struct sk_buff *skb;
97a64b45 2992
7deb2264 2993 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2994 if (skb == NULL)
2995 return -ENOMEM;
2996
2997 if (build_report(skb, proto, sel, addr) < 0)
2998 BUG();
2999
21ee543e 3000 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
97a64b45
MN		 3001}
3002
3a2dfbe8
MW		 3003static inline size_t xfrm_mapping_msgsize(void)
3004{
3005 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3006}
3007
3008static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3009 xfrm_address_t *new_saddr, __be16 new_sport)
3010{
3011 struct xfrm_user_mapping *um;
3012 struct nlmsghdr *nlh;
3013
3014 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3015 if (nlh == NULL)
3016 return -EMSGSIZE;
3017
3018 um = nlmsg_data(nlh);
3019
3020 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3021 um->id.spi = x->id.spi;
3022 um->id.family = x->props.family;
3023 um->id.proto = x->id.proto;
3024 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3025 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3026 um->new_sport = new_sport;
3027 um->old_sport = x->encap->encap_sport;
3028 um->reqid = x->props.reqid;
3029
3030 return nlmsg_end(skb, nlh);
3031}
3032
3033static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3034 __be16 sport)
3035{
a6483b79 3036 struct net *net = xs_net(x);
3a2dfbe8
MW		 3037 struct sk_buff *skb;
3038
3039 if (x->id.proto != IPPROTO_ESP)
3040 return -EINVAL;
3041
3042 if (!x->encap)
3043 return -EINVAL;
3044
3045 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3046 if (skb == NULL)
3047 return -ENOMEM;
3048
3049 if (build_mapping(skb, x, ipaddr, sport) < 0)
3050 BUG();
3051
21ee543e 3052 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3a2dfbe8
MW		 3053}
3054
0f24558e
HG		 3055static bool xfrm_is_alive(const struct km_event *c)
3056{
3057 return (bool)xfrm_acquire_is_on(c->net);
3058}
3059
1da177e4
LT		 3060static struct xfrm_mgr netlink_mgr = {
3061 .id = "netlink",
3062 .notify = xfrm_send_state_notify,
3063 .acquire = xfrm_send_acquire,
3064 .compile_policy = xfrm_compile_policy,
3065 .notify_policy = xfrm_send_policy_notify,
97a64b45 3066 .report = xfrm_send_report,
5c79de6e 3067 .migrate = xfrm_send_migrate,
3a2dfbe8 3068 .new_mapping = xfrm_send_mapping,
0f24558e 3069 .is_alive = xfrm_is_alive,
1da177e4
LT		 3070};
3071
a6483b79 3072static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 3073{
be33690d 3074 struct sock *nlsk;
a31f2d17
PNA		 3075 struct netlink_kernel_cfg cfg = {
3076 .groups = XFRMNLGRP_MAX,
3077 .input = xfrm_netlink_rcv,
3078 };
be33690d 3079
9f00d977 3080 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3081 if (nlsk == NULL)
1da177e4 3082 return -ENOMEM;
d79d792e 3083 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3084 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3085 return 0;
3086}
3087
d79d792e 3088static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3089{
d79d792e
EB		 3090 struct net *net;
3091 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3092 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3093 synchronize_net();
3094 list_for_each_entry(net, net_exit_list, exit_list)
3095 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3096}
3097
a6483b79 3098static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3099 .init = xfrm_user_net_init,
3100 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3101};
3102
3103static int __init xfrm_user_init(void)
3104{
3105 int rv;
3106
3107 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3108
3109 rv = register_pernet_subsys(&xfrm_user_net_ops);
3110 if (rv < 0)
3111 return rv;
3112 rv = xfrm_register_km(&netlink_mgr);
3113 if (rv < 0)
3114 unregister_pernet_subsys(&xfrm_user_net_ops);
3115 return rv;
3116}
3117
3118static void __exit xfrm_user_exit(void)
3119{
3120 xfrm_unregister_km(&netlink_mgr);
3121 unregister_pernet_subsys(&xfrm_user_net_ops);
3122}
3123
1da177e4
LT		 3124module_init(xfrm_user_init);
3125module_exit(xfrm_user_exit);
3126MODULE_LICENSE("GPL");
4fdb3bb7 3127MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3128
Linux kernel - Deliverables
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