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atm: remove deprecated use of pci api
[mirror_ubuntu-zesty-kernel.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
fa6dd8a2 29#include <net/ah.h>
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;
f293a5e3 827 if (x->replay_esn)
1d1e34dd
DM		 828 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
829 xfrm_replay_state_esn_len(x->replay_esn),
830 x->replay_esn);
f293a5e3 831 else
832 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
833 &x->replay);
834 if (ret)
835 goto out;
1d1e34dd
DM		 836 if (x->security)
837 ret = copy_sec_ctx(x->security, skb);
838out:
839 return ret;
68325d3b
HX		 840}
841
842static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
843{
844 struct xfrm_dump_info *sp = ptr;
845 struct sk_buff *in_skb = sp->in_skb;
846 struct sk_buff *skb = sp->out_skb;
847 struct xfrm_usersa_info *p;
848 struct nlmsghdr *nlh;
849 int err;
850
15e47304 851 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 852 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
853 if (nlh == NULL)
854 return -EMSGSIZE;
855
856 p = nlmsg_data(nlh);
857
858 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 859 if (err) {
860 nlmsg_cancel(skb, nlh);
861 return err;
862 }
9825069d 863 nlmsg_end(skb, nlh);
1da177e4 864 return 0;
1da177e4
LT		 865}
866
4c563f76
TT		 867static int xfrm_dump_sa_done(struct netlink_callback *cb)
868{
869 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 870 struct sock *sk = cb->skb->sk;
871 struct net *net = sock_net(sk);
872
873 xfrm_state_walk_done(walk, net);
4c563f76
TT		 874 return 0;
875}
876
d3623099 877static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
1da177e4
LT		 878static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
879{
fc34acd3 880 struct net *net = sock_net(skb->sk);
4c563f76 881 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 882 struct xfrm_dump_info info;
883
4c563f76
TT		 884 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
885 sizeof(cb->args) - sizeof(cb->args[0]));
886
1da177e4
LT		 887 info.in_skb = cb->skb;
888 info.out_skb = skb;
889 info.nlmsg_seq = cb->nlh->nlmsg_seq;
890 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 891
892 if (!cb->args[0]) {
d3623099 893 struct nlattr *attrs[XFRMA_MAX+1];
870a2df4 894 struct xfrm_address_filter *filter = NULL;
d3623099
ND		 895 u8 proto = 0;
896 int err;
897
4c563f76 898 cb->args[0] = 1;
d3623099
ND		 899
900 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX,
901 xfrma_policy);
902 if (err < 0)
903 return err;
904
870a2df4 905 if (attrs[XFRMA_ADDRESS_FILTER]) {
d3623099
ND		 906 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
907 if (filter == NULL)
908 return -ENOMEM;
909
870a2df4 910 memcpy(filter, nla_data(attrs[XFRMA_ADDRESS_FILTER]),
d3623099
ND		 911 sizeof(*filter));
912 }
913
914 if (attrs[XFRMA_PROTO])
915 proto = nla_get_u8(attrs[XFRMA_PROTO]);
916
917 xfrm_state_walk_init(walk, proto, filter);
4c563f76
TT		 918 }
919
fc34acd3 920 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 921
922 return skb->len;
923}
924
925static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
926 struct xfrm_state *x, u32 seq)
927{
928 struct xfrm_dump_info info;
929 struct sk_buff *skb;
864745d2 930 int err;
1da177e4 931
7deb2264 932 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 933 if (!skb)
934 return ERR_PTR(-ENOMEM);
935
1da177e4
LT		 936 info.in_skb = in_skb;
937 info.out_skb = skb;
938 info.nlmsg_seq = seq;
939 info.nlmsg_flags = 0;
1da177e4 940
864745d2
MK		 941 err = dump_one_state(x, 0, &info);
942 if (err) {
1da177e4 943 kfree_skb(skb);
864745d2 944 return ERR_PTR(err);
1da177e4
LT		 945 }
946
947 return skb;
948}
949
21ee543e
MK		 950/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
951 * Must be called with RCU read lock.
952 */
953static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
954 u32 pid, unsigned int group)
955{
956 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
957
958 if (nlsk)
959 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
960 else
961 return -1;
962}
963
7deb2264
TG		 964static inline size_t xfrm_spdinfo_msgsize(void)
965{
966 return NLMSG_ALIGN(4)
967 + nla_total_size(sizeof(struct xfrmu_spdinfo))
880a6fab
CG		 968 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
969 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
970 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
7deb2264
TG		 971}
972
e071041b 973static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 974 u32 portid, u32 seq, u32 flags)
ecfd6b18 975{
5a6d3416
JHS		 976 struct xfrmk_spdinfo si;
977 struct xfrmu_spdinfo spc;
978 struct xfrmu_spdhinfo sph;
880a6fab 979 struct xfrmu_spdhthresh spt4, spt6;
ecfd6b18 980 struct nlmsghdr *nlh;
1d1e34dd 981 int err;
ecfd6b18 982 u32 *f;
880a6fab 983 unsigned lseq;
ecfd6b18 984
15e47304 985 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 986 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 987 return -EMSGSIZE;
988
989 f = nlmsg_data(nlh);
990 *f = flags;
e071041b 991 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 992 spc.incnt = si.incnt;
993 spc.outcnt = si.outcnt;
994 spc.fwdcnt = si.fwdcnt;
995 spc.inscnt = si.inscnt;
996 spc.outscnt = si.outscnt;
997 spc.fwdscnt = si.fwdscnt;
998 sph.spdhcnt = si.spdhcnt;
999 sph.spdhmcnt = si.spdhmcnt;
1000
880a6fab
CG		 1001 do {
1002 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1003
1004 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1005 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1006 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1007 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1008 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1009
1d1e34dd
DM		 1010 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1011 if (!err)
1012 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
880a6fab
CG		 1013 if (!err)
1014 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1015 if (!err)
1016 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1d1e34dd
DM		 1017 if (err) {
1018 nlmsg_cancel(skb, nlh);
1019 return err;
1020 }
ecfd6b18
JHS		 1021
1022 return nlmsg_end(skb, nlh);
ecfd6b18
JHS		 1023}
1024
880a6fab
CG		 1025static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1026 struct nlattr **attrs)
1027{
1028 struct net *net = sock_net(skb->sk);
1029 struct xfrmu_spdhthresh *thresh4 = NULL;
1030 struct xfrmu_spdhthresh *thresh6 = NULL;
1031
1032 /* selector prefixlen thresholds to hash policies */
1033 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1034 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1035
1036 if (nla_len(rta) < sizeof(*thresh4))
1037 return -EINVAL;
1038 thresh4 = nla_data(rta);
1039 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1040 return -EINVAL;
1041 }
1042 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1043 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1044
1045 if (nla_len(rta) < sizeof(*thresh6))
1046 return -EINVAL;
1047 thresh6 = nla_data(rta);
1048 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1049 return -EINVAL;
1050 }
1051
1052 if (thresh4 || thresh6) {
1053 write_seqlock(&net->xfrm.policy_hthresh.lock);
1054 if (thresh4) {
1055 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1056 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1057 }
1058 if (thresh6) {
1059 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1060 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1061 }
1062 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1063
1064 xfrm_policy_hash_rebuild(net);
1065 }
1066
1067 return 0;
1068}
1069
ecfd6b18 1070static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1071 struct nlattr **attrs)
ecfd6b18 1072{
a6483b79 1073 struct net *net = sock_net(skb->sk);
ecfd6b18 1074 struct sk_buff *r_skb;
7b67c857 1075 u32 *flags = nlmsg_data(nlh);
15e47304 1076 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 1077 u32 seq = nlh->nlmsg_seq;
ecfd6b18 1078
7deb2264 1079 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 1080 if (r_skb == NULL)
1081 return -ENOMEM;
1082
15e47304 1083 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
ecfd6b18
JHS		 1084 BUG();
1085
15e47304 1086 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 1087}
1088
7deb2264
TG		 1089static inline size_t xfrm_sadinfo_msgsize(void)
1090{
1091 return NLMSG_ALIGN(4)
1092 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1093 + nla_total_size(4); /* XFRMA_SAD_CNT */
1094}
1095
e071041b 1096static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1097 u32 portid, u32 seq, u32 flags)
28d8909b 1098{
af11e316
JHS		 1099 struct xfrmk_sadinfo si;
1100 struct xfrmu_sadhinfo sh;
28d8909b 1101 struct nlmsghdr *nlh;
1d1e34dd 1102 int err;
28d8909b
JHS		 1103 u32 *f;
1104
15e47304 1105 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1106 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1107 return -EMSGSIZE;
1108
1109 f = nlmsg_data(nlh);
1110 *f = flags;
e071041b 1111 xfrm_sad_getinfo(net, &si);
28d8909b 1112
af11e316
JHS		 1113 sh.sadhmcnt = si.sadhmcnt;
1114 sh.sadhcnt = si.sadhcnt;
1115
1d1e34dd
DM		 1116 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1117 if (!err)
1118 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1119 if (err) {
1120 nlmsg_cancel(skb, nlh);
1121 return err;
1122 }
28d8909b
JHS		 1123
1124 return nlmsg_end(skb, nlh);
28d8909b
JHS		 1125}
1126
1127static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1128 struct nlattr **attrs)
28d8909b 1129{
a6483b79 1130 struct net *net = sock_net(skb->sk);
28d8909b 1131 struct sk_buff *r_skb;
7b67c857 1132 u32 *flags = nlmsg_data(nlh);
15e47304 1133 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1134 u32 seq = nlh->nlmsg_seq;
28d8909b 1135
7deb2264 1136 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1137 if (r_skb == NULL)
1138 return -ENOMEM;
1139
15e47304 1140 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
28d8909b
JHS		 1141 BUG();
1142
15e47304 1143 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1144}
1145
22e70050 1146static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1147 struct nlattr **attrs)
1da177e4 1148{
fc34acd3 1149 struct net *net = sock_net(skb->sk);
7b67c857 1150 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1151 struct xfrm_state *x;
1152 struct sk_buff *resp_skb;
eb2971b6 1153 int err = -ESRCH;
1da177e4 1154
fc34acd3 1155 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1156 if (x == NULL)
1157 goto out_noput;
1158
1159 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1160 if (IS_ERR(resp_skb)) {
1161 err = PTR_ERR(resp_skb);
1162 } else {
15e47304 1163 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1164 }
1165 xfrm_state_put(x);
1166out_noput:
1167 return err;
1168}
1169
22e70050 1170static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1171 struct nlattr **attrs)
1da177e4 1172{
fc34acd3 1173 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1174 struct xfrm_state *x;
1175 struct xfrm_userspi_info *p;
1176 struct sk_buff *resp_skb;
1177 xfrm_address_t *daddr;
1178 int family;
1179 int err;
6f26b61e
JHS		 1180 u32 mark;
1181 struct xfrm_mark m;
1da177e4 1182
7b67c857 1183 p = nlmsg_data(nlh);
776e9dd9 1184 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1185 if (err)
1186 goto out_noput;
1187
1188 family = p->info.family;
1189 daddr = &p->info.id.daddr;
1190
1191 x = NULL;
6f26b61e
JHS		 1192
1193 mark = xfrm_mark_get(attrs, &m);
1da177e4 1194 if (p->info.seq) {
6f26b61e 1195 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1196 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1197 xfrm_state_put(x);
1198 x = NULL;
1199 }
1200 }
1201
1202 if (!x)
6f26b61e 1203 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1204 p->info.id.proto, daddr,
1205 &p->info.saddr, 1,
1206 family);
1207 err = -ENOENT;
1208 if (x == NULL)
1209 goto out_noput;
1210
658b219e
HX		 1211 err = xfrm_alloc_spi(x, p->min, p->max);
1212 if (err)
1213 goto out;
1da177e4 1214
658b219e 1215 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1216 if (IS_ERR(resp_skb)) {
1217 err = PTR_ERR(resp_skb);
1218 goto out;
1219 }
1220
15e47304 1221 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1222
1223out:
1224 xfrm_state_put(x);
1225out_noput:
1226 return err;
1227}
1228
b798a9ed 1229static int verify_policy_dir(u8 dir)
1da177e4
LT		 1230{
1231 switch (dir) {
1232 case XFRM_POLICY_IN:
1233 case XFRM_POLICY_OUT:
1234 case XFRM_POLICY_FWD:
1235 break;
1236
1237 default:
1238 return -EINVAL;
3ff50b79 1239 }
1da177e4
LT		 1240
1241 return 0;
1242}
1243
b798a9ed 1244static int verify_policy_type(u8 type)
f7b6983f
MN		 1245{
1246 switch (type) {
1247 case XFRM_POLICY_TYPE_MAIN:
1248#ifdef CONFIG_XFRM_SUB_POLICY
1249 case XFRM_POLICY_TYPE_SUB:
1250#endif
1251 break;
1252
1253 default:
1254 return -EINVAL;
3ff50b79 1255 }
f7b6983f
MN		 1256
1257 return 0;
1258}
1259
1da177e4
LT		 1260static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1261{
e682adf0
FD		 1262 int ret;
1263
1da177e4
LT		 1264 switch (p->share) {
1265 case XFRM_SHARE_ANY:
1266 case XFRM_SHARE_SESSION:
1267 case XFRM_SHARE_USER:
1268 case XFRM_SHARE_UNIQUE:
1269 break;
1270
1271 default:
1272 return -EINVAL;
3ff50b79 1273 }
1da177e4
LT		 1274
1275 switch (p->action) {
1276 case XFRM_POLICY_ALLOW:
1277 case XFRM_POLICY_BLOCK:
1278 break;
1279
1280 default:
1281 return -EINVAL;
3ff50b79 1282 }
1da177e4
LT		 1283
1284 switch (p->sel.family) {
1285 case AF_INET:
1286 break;
1287
1288 case AF_INET6:
dfd56b8b 1289#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1290 break;
1291#else
1292 return -EAFNOSUPPORT;
1293#endif
1294
1295 default:
1296 return -EINVAL;
3ff50b79 1297 }
1da177e4 1298
e682adf0
FD		 1299 ret = verify_policy_dir(p->dir);
1300 if (ret)
1301 return ret;
1302 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1303 return -EINVAL;
1304
1305 return 0;
1da177e4
LT		 1306}
1307
5424f32e 1308static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1309{
5424f32e 1310 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1311 struct xfrm_user_sec_ctx *uctx;
1312
1313 if (!rt)
1314 return 0;
1315
5424f32e 1316 uctx = nla_data(rt);
52a4c640 1317 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1318}
1319
1da177e4
LT		 1320static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1321 int nr)
1322{
1323 int i;
1324
1325 xp->xfrm_nr = nr;
1326 for (i = 0; i < nr; i++, ut++) {
1327 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1328
1329 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1330 memcpy(&t->saddr, &ut->saddr,
1331 sizeof(xfrm_address_t));
1332 t->reqid = ut->reqid;
1333 t->mode = ut->mode;
1334 t->share = ut->share;
1335 t->optional = ut->optional;
1336 t->aalgos = ut->aalgos;
1337 t->ealgos = ut->ealgos;
1338 t->calgos = ut->calgos;
c5d18e98
HX		 1339 /* If all masks are ~0, then we allow all algorithms. */
1340 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1341 t->encap_family = ut->family;
1da177e4
LT		 1342 }
1343}
1344
b4ad86bf
DM		 1345static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1346{
1347 int i;
1348
1349 if (nr > XFRM_MAX_DEPTH)
1350 return -EINVAL;
1351
1352 for (i = 0; i < nr; i++) {
1353 /* We never validated the ut->family value, so many
1354 * applications simply leave it at zero. The check was
1355 * never made and ut->family was ignored because all
1356 * templates could be assumed to have the same family as
1357 * the policy itself. Now that we will have ipv4-in-ipv6
1358 * and ipv6-in-ipv4 tunnels, this is no longer true.
1359 */
1360 if (!ut[i].family)
1361 ut[i].family = family;
1362
1363 switch (ut[i].family) {
1364 case AF_INET:
1365 break;
dfd56b8b 1366#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1367 case AF_INET6:
1368 break;
1369#endif
1370 default:
1371 return -EINVAL;
3ff50b79 1372 }
b4ad86bf
DM		 1373 }
1374
1375 return 0;
1376}
1377
5424f32e 1378static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1379{
5424f32e 1380 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1381
1382 if (!rt) {
1383 pol->xfrm_nr = 0;
1384 } else {
5424f32e
TG		 1385 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1386 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1387 int err;
1da177e4 1388
b4ad86bf
DM		 1389 err = validate_tmpl(nr, utmpl, pol->family);
1390 if (err)
1391 return err;
1da177e4 1392
5424f32e 1393 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1394 }
1395 return 0;
1396}
1397
5424f32e 1398static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1399{
5424f32e 1400 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1401 struct xfrm_userpolicy_type *upt;
b798a9ed 1402 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1403 int err;
1404
1405 if (rt) {
5424f32e 1406 upt = nla_data(rt);
f7b6983f
MN		 1407 type = upt->type;
1408 }
1409
1410 err = verify_policy_type(type);
1411 if (err)
1412 return err;
1413
1414 *tp = type;
1415 return 0;
1416}
1417
1da177e4
LT		 1418static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1419{
1420 xp->priority = p->priority;
1421 xp->index = p->index;
1422 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1423 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1424 xp->action = p->action;
1425 xp->flags = p->flags;
1426 xp->family = p->sel.family;
1427 /* XXX xp->share = p->share; */
1428}
1429
1430static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1431{
7b789836 1432 memset(p, 0, sizeof(*p));
1da177e4
LT		 1433 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1434 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1435 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1436 p->priority = xp->priority;
1437 p->index = xp->index;
1438 p->sel.family = xp->family;
1439 p->dir = dir;
1440 p->action = xp->action;
1441 p->flags = xp->flags;
1442 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1443}
1444
fc34acd3 1445static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1446{
fc34acd3 1447 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1448 int err;
1449
1450 if (!xp) {
1451 *errp = -ENOMEM;
1452 return NULL;
1453 }
1454
1455 copy_from_user_policy(xp, p);
df71837d 1456
35a7aa08 1457 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1458 if (err)
1459 goto error;
1460
35a7aa08
TG		 1461 if (!(err = copy_from_user_tmpl(xp, attrs)))
1462 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1463 if (err)
1464 goto error;
1da177e4 1465
295fae56
JHS		 1466 xfrm_mark_get(attrs, &xp->mark);
1467
1da177e4 1468 return xp;
f7b6983f
MN		 1469 error:
1470 *errp = err;
12a169e7 1471 xp->walk.dead = 1;
64c31b3f 1472 xfrm_policy_destroy(xp);
f7b6983f 1473 return NULL;
1da177e4
LT		 1474}
1475
22e70050 1476static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1477 struct nlattr **attrs)
1da177e4 1478{
fc34acd3 1479 struct net *net = sock_net(skb->sk);
7b67c857 1480 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1481 struct xfrm_policy *xp;
26b15dad 1482 struct km_event c;
1da177e4
LT		 1483 int err;
1484 int excl;
1485
1486 err = verify_newpolicy_info(p);
df71837d
TJ		 1487 if (err)
1488 return err;
35a7aa08 1489 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1490 if (err)
1491 return err;
1492
fc34acd3 1493 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1494 if (!xp)
1495 return err;
1496
25985edc 1497 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1498 * Aha! this is anti-netlink really i.e more pfkey derived
1499 * in netlink excl is a flag and you wouldnt need
1500 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1501 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1502 err = xfrm_policy_insert(p->dir, xp, excl);
2e71029e 1503 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 1504
1da177e4 1505 if (err) {
03e1ad7b 1506 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1507 kfree(xp);
1508 return err;
1509 }
1510
f60f6b8f 1511 c.event = nlh->nlmsg_type;
26b15dad 1512 c.seq = nlh->nlmsg_seq;
15e47304 1513 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1514 km_policy_notify(xp, p->dir, &c);
1515
1da177e4
LT		 1516 xfrm_pol_put(xp);
1517
1518 return 0;
1519}
1520
1521static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1522{
1523 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1524 int i;
1525
1526 if (xp->xfrm_nr == 0)
1527 return 0;
1528
1529 for (i = 0; i < xp->xfrm_nr; i++) {
1530 struct xfrm_user_tmpl *up = &vec[i];
1531 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1532
1f86840f 1533 memset(up, 0, sizeof(*up));
1da177e4 1534 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1535 up->family = kp->encap_family;
1da177e4
LT		 1536 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1537 up->reqid = kp->reqid;
1538 up->mode = kp->mode;
1539 up->share = kp->share;
1540 up->optional = kp->optional;
1541 up->aalgos = kp->aalgos;
1542 up->ealgos = kp->ealgos;
1543 up->calgos = kp->calgos;
1544 }
df71837d 1545
c0144bea
TG		 1546 return nla_put(skb, XFRMA_TMPL,
1547 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1548}
1549
1550static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1551{
1552 if (x->security) {
1553 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1554 }
1555 return 0;
0d681623 1556}
df71837d 1557
0d681623
SH		 1558static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1559{
1d1e34dd 1560 if (xp->security)
0d681623 1561 return copy_sec_ctx(xp->security, skb);
0d681623 1562 return 0;
df71837d 1563}
cfbfd45a
TG		 1564static inline size_t userpolicy_type_attrsize(void)
1565{
1566#ifdef CONFIG_XFRM_SUB_POLICY
1567 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1568#else
1569 return 0;
1570#endif
1571}
df71837d 1572
f7b6983f 1573#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1574static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1575{
c0144bea
TG		 1576 struct xfrm_userpolicy_type upt = {
1577 .type = type,
1578 };
f7b6983f 1579
c0144bea 1580 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1581}
1582
1583#else
b798a9ed 1584static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1585{
1586 return 0;
1587}
1588#endif
1589
1da177e4
LT		 1590static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1591{
1592 struct xfrm_dump_info *sp = ptr;
1593 struct xfrm_userpolicy_info *p;
1594 struct sk_buff *in_skb = sp->in_skb;
1595 struct sk_buff *skb = sp->out_skb;
1596 struct nlmsghdr *nlh;
1d1e34dd 1597 int err;
1da177e4 1598
15e47304 1599 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1600 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1601 if (nlh == NULL)
1602 return -EMSGSIZE;
1da177e4 1603
7b67c857 1604 p = nlmsg_data(nlh);
1da177e4 1605 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1606 err = copy_to_user_tmpl(xp, skb);
1607 if (!err)
1608 err = copy_to_user_sec_ctx(xp, skb);
1609 if (!err)
1610 err = copy_to_user_policy_type(xp->type, skb);
1611 if (!err)
1612 err = xfrm_mark_put(skb, &xp->mark);
1613 if (err) {
1614 nlmsg_cancel(skb, nlh);
1615 return err;
1616 }
9825069d 1617 nlmsg_end(skb, nlh);
1da177e4 1618 return 0;
1da177e4
LT		 1619}
1620
4c563f76
TT		 1621static int xfrm_dump_policy_done(struct netlink_callback *cb)
1622{
1623 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
283bc9f3 1624 struct net *net = sock_net(cb->skb->sk);
4c563f76 1625
283bc9f3 1626 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1627 return 0;
1628}
1629
1da177e4
LT		 1630static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1631{
fc34acd3 1632 struct net *net = sock_net(skb->sk);
4c563f76 1633 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1634 struct xfrm_dump_info info;
1635
4c563f76
TT		 1636 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1637 sizeof(cb->args) - sizeof(cb->args[0]));
1638
1da177e4
LT		 1639 info.in_skb = cb->skb;
1640 info.out_skb = skb;
1641 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1642 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1643
1644 if (!cb->args[0]) {
1645 cb->args[0] = 1;
1646 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1647 }
1648
fc34acd3 1649 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1650
1651 return skb->len;
1652}
1653
1654static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1655 struct xfrm_policy *xp,
1656 int dir, u32 seq)
1657{
1658 struct xfrm_dump_info info;
1659 struct sk_buff *skb;
c2546372 1660 int err;
1da177e4 1661
7deb2264 1662 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1663 if (!skb)
1664 return ERR_PTR(-ENOMEM);
1665
1da177e4
LT		 1666 info.in_skb = in_skb;
1667 info.out_skb = skb;
1668 info.nlmsg_seq = seq;
1669 info.nlmsg_flags = 0;
1da177e4 1670
c2546372
MK		 1671 err = dump_one_policy(xp, dir, 0, &info);
1672 if (err) {
1da177e4 1673 kfree_skb(skb);
c2546372 1674 return ERR_PTR(err);
1da177e4
LT		 1675 }
1676
1677 return skb;
1678}
1679
22e70050 1680static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1681 struct nlattr **attrs)
1da177e4 1682{
fc34acd3 1683 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1684 struct xfrm_policy *xp;
1685 struct xfrm_userpolicy_id *p;
b798a9ed 1686 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1687 int err;
26b15dad 1688 struct km_event c;
1da177e4 1689 int delete;
295fae56
JHS		 1690 struct xfrm_mark m;
1691 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1692
7b67c857 1693 p = nlmsg_data(nlh);
1da177e4
LT		 1694 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1695
35a7aa08 1696 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1697 if (err)
1698 return err;
1699
1da177e4
LT		 1700 err = verify_policy_dir(p->dir);
1701 if (err)
1702 return err;
1703
1704 if (p->index)
295fae56 1705 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1706 else {
5424f32e 1707 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1708 struct xfrm_sec_ctx *ctx;
df71837d 1709
35a7aa08 1710 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1711 if (err)
1712 return err;
1713
2c8dd116 1714 ctx = NULL;
df71837d 1715 if (rt) {
5424f32e 1716 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1717
52a4c640 1718 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1719 if (err)
df71837d 1720 return err;
2c8dd116 1721 }
295fae56 1722 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1723 ctx, delete, &err);
03e1ad7b 1724 security_xfrm_policy_free(ctx);
df71837d 1725 }
1da177e4
LT		 1726 if (xp == NULL)
1727 return -ENOENT;
1728
1729 if (!delete) {
1730 struct sk_buff *resp_skb;
1731
1732 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1733 if (IS_ERR(resp_skb)) {
1734 err = PTR_ERR(resp_skb);
1735 } else {
a6483b79 1736 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1737 NETLINK_CB(skb).portid);
1da177e4 1738 }
26b15dad 1739 } else {
2e71029e 1740 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 1741
1742 if (err != 0)
c8c05a8e 1743 goto out;
13fcfbb0 1744
e7443892 1745 c.data.byid = p->index;
f60f6b8f 1746 c.event = nlh->nlmsg_type;
26b15dad 1747 c.seq = nlh->nlmsg_seq;
15e47304 1748 c.portid = nlh->nlmsg_pid;
26b15dad 1749 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1750 }
1751
c8c05a8e 1752out:
ef41aaa0 1753 xfrm_pol_put(xp);
e4c17216
PM		 1754 if (delete && err == 0)
1755 xfrm_garbage_collect(net);
1da177e4
LT		 1756 return err;
1757}
1758
22e70050 1759static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1760 struct nlattr **attrs)
1da177e4 1761{
fc34acd3 1762 struct net *net = sock_net(skb->sk);
26b15dad 1763 struct km_event c;
7b67c857 1764 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
4aa2e62c 1765 int err;
1da177e4 1766
2e71029e 1767 err = xfrm_state_flush(net, p->proto, true);
9e64cc95
JHS		 1768 if (err) {
1769 if (err == -ESRCH) /* empty table */
1770 return 0;
069c474e 1771 return err;
9e64cc95 1772 }
bf08867f 1773 c.data.proto = p->proto;
f60f6b8f 1774 c.event = nlh->nlmsg_type;
26b15dad 1775 c.seq = nlh->nlmsg_seq;
15e47304 1776 c.portid = nlh->nlmsg_pid;
7067802e 1777 c.net = net;
26b15dad
JHS		 1778 km_state_notify(NULL, &c);
1779
1da177e4
LT		 1780 return 0;
1781}
1782
d8647b79 1783static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1784{
d8647b79
SK		 1785 size_t replay_size = x->replay_esn ?
1786 xfrm_replay_state_esn_len(x->replay_esn) :
1787 sizeof(struct xfrm_replay_state);
1788
7deb2264 1789 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1790 + nla_total_size(replay_size)
7deb2264 1791 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1792 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1793 + nla_total_size(4) /* XFRM_AE_RTHR */
1794 + nla_total_size(4); /* XFRM_AE_ETHR */
1795}
d51d081d 1796
214e005b 1797static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1798{
1799 struct xfrm_aevent_id *id;
1800 struct nlmsghdr *nlh;
1d1e34dd 1801 int err;
d51d081d 1802
15e47304 1803 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1804 if (nlh == NULL)
1805 return -EMSGSIZE;
d51d081d 1806
7b67c857 1807 id = nlmsg_data(nlh);
9b7a787d 1808 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1809 id->sa_id.spi = x->id.spi;
1810 id->sa_id.family = x->props.family;
1811 id->sa_id.proto = x->id.proto;
9b7a787d 1812 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1813 id->reqid = x->props.reqid;
d51d081d
JHS		 1814 id->flags = c->data.aevent;
1815
d0fde795 1816 if (x->replay_esn) {
1d1e34dd
DM		 1817 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1818 xfrm_replay_state_esn_len(x->replay_esn),
1819 x->replay_esn);
d0fde795 1820 } else {
1d1e34dd
DM		 1821 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1822 &x->replay);
d0fde795 1823 }
1d1e34dd
DM		 1824 if (err)
1825 goto out_cancel;
1826 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1827 if (err)
1828 goto out_cancel;
d51d081d 1829
1d1e34dd
DM		 1830 if (id->flags & XFRM_AE_RTHR) {
1831 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1832 if (err)
1833 goto out_cancel;
1834 }
1835 if (id->flags & XFRM_AE_ETHR) {
1836 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1837 x->replay_maxage * 10 / HZ);
1838 if (err)
1839 goto out_cancel;
1840 }
1841 err = xfrm_mark_put(skb, &x->mark);
1842 if (err)
1843 goto out_cancel;
6f26b61e 1844
9825069d 1845 return nlmsg_end(skb, nlh);
d51d081d 1846
1d1e34dd 1847out_cancel:
9825069d 1848 nlmsg_cancel(skb, nlh);
1d1e34dd 1849 return err;
d51d081d
JHS		 1850}
1851
22e70050 1852static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1853 struct nlattr **attrs)
d51d081d 1854{
fc34acd3 1855 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1856 struct xfrm_state *x;
1857 struct sk_buff *r_skb;
1858 int err;
1859 struct km_event c;
6f26b61e
JHS		 1860 u32 mark;
1861 struct xfrm_mark m;
7b67c857 1862 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1863 struct xfrm_usersa_id *id = &p->sa_id;
1864
6f26b61e
JHS		 1865 mark = xfrm_mark_get(attrs, &m);
1866
1867 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1868 if (x == NULL)
d51d081d 1869 return -ESRCH;
d8647b79
SK		 1870
1871 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1872 if (r_skb == NULL) {
1873 xfrm_state_put(x);
1874 return -ENOMEM;
d51d081d
JHS		 1875 }
1876
1877 /*
1878 * XXX: is this lock really needed - none of the other
1879 * gets lock (the concern is things getting updated
1880 * while we are still reading) - jhs
1881 */
1882 spin_lock_bh(&x->lock);
1883 c.data.aevent = p->flags;
1884 c.seq = nlh->nlmsg_seq;
15e47304 1885 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1886
1887 if (build_aevent(r_skb, x, &c) < 0)
1888 BUG();
15e47304 1889 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1890 spin_unlock_bh(&x->lock);
1891 xfrm_state_put(x);
1892 return err;
1893}
1894
22e70050 1895static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1896 struct nlattr **attrs)
d51d081d 1897{
fc34acd3 1898 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1899 struct xfrm_state *x;
1900 struct km_event c;
02d0892f 1901 int err = -EINVAL;
6f26b61e
JHS		 1902 u32 mark = 0;
1903 struct xfrm_mark m;
7b67c857 1904 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1905 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1906 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1907 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d 1908
d8647b79 1909 if (!lt && !rp && !re)
d51d081d
JHS		 1910 return err;
1911
1912 /* pedantic mode - thou shalt sayeth replaceth */
1913 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1914 return err;
1915
6f26b61e
JHS		 1916 mark = xfrm_mark_get(attrs, &m);
1917
1918 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1919 if (x == NULL)
1920 return -ESRCH;
1921
1922 if (x->km.state != XFRM_STATE_VALID)
1923 goto out;
1924
4479ff76 1925 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 1926 if (err)
1927 goto out;
1928
d51d081d 1929 spin_lock_bh(&x->lock);
e3ac104d 1930 xfrm_update_ae_params(x, attrs, 1);
d51d081d 1931 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1932
1933 c.event = nlh->nlmsg_type;
1934 c.seq = nlh->nlmsg_seq;
15e47304 1935 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1936 c.data.aevent = XFRM_AE_CU;
1937 km_state_notify(x, &c);
1938 err = 0;
1939out:
1940 xfrm_state_put(x);
1941 return err;
1942}
1943
22e70050 1944static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1945 struct nlattr **attrs)
1da177e4 1946{
fc34acd3 1947 struct net *net = sock_net(skb->sk);
f7b6983f 1948 struct km_event c;
b798a9ed 1949 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1950 int err;
1951
35a7aa08 1952 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1953 if (err)
1954 return err;
26b15dad 1955
2e71029e 1956 err = xfrm_policy_flush(net, type, true);
2f1eb65f
JHS		 1957 if (err) {
1958 if (err == -ESRCH) /* empty table */
1959 return 0;
069c474e 1960 return err;
2f1eb65f
JHS		 1961 }
1962
f7b6983f 1963 c.data.type = type;
f60f6b8f 1964 c.event = nlh->nlmsg_type;
26b15dad 1965 c.seq = nlh->nlmsg_seq;
15e47304 1966 c.portid = nlh->nlmsg_pid;
7067802e 1967 c.net = net;
26b15dad 1968 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1969 return 0;
1970}
1971
22e70050 1972static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1973 struct nlattr **attrs)
6c5c8ca7 1974{
fc34acd3 1975 struct net *net = sock_net(skb->sk);
6c5c8ca7 1976 struct xfrm_policy *xp;
7b67c857 1977 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1978 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1979 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 1980 int err = -ENOENT;
295fae56
JHS		 1981 struct xfrm_mark m;
1982 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 1983
35a7aa08 1984 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1985 if (err)
1986 return err;
1987
c8bf4d04
TT		 1988 err = verify_policy_dir(p->dir);
1989 if (err)
1990 return err;
1991
6c5c8ca7 1992 if (p->index)
295fae56 1993 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 1994 else {
5424f32e 1995 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1996 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1997
35a7aa08 1998 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1999 if (err)
2000 return err;
2001
2c8dd116 2002 ctx = NULL;
6c5c8ca7 2003 if (rt) {
5424f32e 2004 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 2005
52a4c640 2006 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 2007 if (err)
6c5c8ca7 2008 return err;
2c8dd116 2009 }
295fae56 2010 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 2011 &p->sel, ctx, 0, &err);
03e1ad7b 2012 security_xfrm_policy_free(ctx);
6c5c8ca7 2013 }
6c5c8ca7 2014 if (xp == NULL)
ef41aaa0 2015 return -ENOENT;
03e1ad7b 2016
ea2dea9d 2017 if (unlikely(xp->walk.dead))
6c5c8ca7 2018 goto out;
6c5c8ca7 2019
6c5c8ca7
JHS		 2020 err = 0;
2021 if (up->hard) {
2022 xfrm_policy_delete(xp, p->dir);
2e71029e 2023 xfrm_audit_policy_delete(xp, 1, true);
6c5c8ca7
JHS		 2024 } else {
2025 // reset the timers here?
62db5cfd 2026 WARN(1, "Dont know what to do with soft policy expire\n");
6c5c8ca7 2027 }
c6bb8136 2028 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 2029
2030out:
2031 xfrm_pol_put(xp);
2032 return err;
2033}
2034
22e70050 2035static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2036 struct nlattr **attrs)
53bc6b4d 2037{
fc34acd3 2038 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 2039 struct xfrm_state *x;
2040 int err;
7b67c857 2041 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 2042 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 2043 struct xfrm_mark m;
928497f0 2044 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 2045
6f26b61e 2046 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 2047
3a765aa5 2048 err = -ENOENT;
53bc6b4d
JHS		 2049 if (x == NULL)
2050 return err;
2051
53bc6b4d 2052 spin_lock_bh(&x->lock);
3a765aa5 2053 err = -EINVAL;
53bc6b4d
JHS		 2054 if (x->km.state != XFRM_STATE_VALID)
2055 goto out;
c6bb8136 2056 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 2057
161a09e7 2058 if (ue->hard) {
53bc6b4d 2059 __xfrm_state_delete(x);
2e71029e 2060 xfrm_audit_state_delete(x, 1, true);
161a09e7 2061 }
3a765aa5 2062 err = 0;
53bc6b4d
JHS		 2063out:
2064 spin_unlock_bh(&x->lock);
2065 xfrm_state_put(x);
2066 return err;
2067}
2068
22e70050 2069static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2070 struct nlattr **attrs)
980ebd25 2071{
fc34acd3 2072 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2073 struct xfrm_policy *xp;
2074 struct xfrm_user_tmpl *ut;
2075 int i;
5424f32e 2076 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2077 struct xfrm_mark mark;
980ebd25 2078
7b67c857 2079 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2080 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2081 int err = -ENOMEM;
2082
2083 if (!x)
d8eb9307 2084 goto nomem;
980ebd25 2085
6f26b61e
JHS		 2086 xfrm_mark_get(attrs, &mark);
2087
980ebd25 2088 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 2089 if (err)
2090 goto bad_policy;
980ebd25
JHS		 2091
2092 /* build an XP */
fc34acd3 2093 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2094 if (!xp)
2095 goto free_state;
980ebd25
JHS		 2096
2097 memcpy(&x->id, &ua->id, sizeof(ua->id));
2098 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2099 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2100 xp->mark.m = x->mark.m = mark.m;
2101 xp->mark.v = x->mark.v = mark.v;
5424f32e 2102 ut = nla_data(rt);
980ebd25
JHS		 2103 /* extract the templates and for each call km_key */
2104 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2105 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2106 memcpy(&x->id, &t->id, sizeof(x->id));
2107 x->props.mode = t->mode;
2108 x->props.reqid = t->reqid;
2109 x->props.family = ut->family;
2110 t->aalgos = ua->aalgos;
2111 t->ealgos = ua->ealgos;
2112 t->calgos = ua->calgos;
2113 err = km_query(x, t, xp);
2114
2115 }
2116
2117 kfree(x);
2118 kfree(xp);
2119
2120 return 0;
d8eb9307
IJ		 2121
2122bad_policy:
62db5cfd 2123 WARN(1, "BAD policy passed\n");
d8eb9307
IJ		 2124free_state:
2125 kfree(x);
2126nomem:
2127 return err;
980ebd25
JHS		 2128}
2129
5c79de6e 2130#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2131static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2132 struct xfrm_kmaddress *k,
5424f32e 2133 struct nlattr **attrs, int *num)
5c79de6e 2134{
5424f32e 2135 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2136 struct xfrm_user_migrate *um;
2137 int i, num_migrate;
2138
13c1d189
AE		 2139 if (k != NULL) {
2140 struct xfrm_user_kmaddress *uk;
2141
2142 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2143 memcpy(&k->local, &uk->local, sizeof(k->local));
2144 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2145 k->family = uk->family;
2146 k->reserved = uk->reserved;
2147 }
2148
5424f32e
TG		 2149 um = nla_data(rt);
2150 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2151
2152 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2153 return -EINVAL;
2154
2155 for (i = 0; i < num_migrate; i++, um++, ma++) {
2156 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2157 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2158 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2159 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2160
2161 ma->proto = um->proto;
2162 ma->mode = um->mode;
2163 ma->reqid = um->reqid;
2164
2165 ma->old_family = um->old_family;
2166 ma->new_family = um->new_family;
2167 }
2168
2169 *num = i;
2170 return 0;
2171}
2172
2173static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2174 struct nlattr **attrs)
5c79de6e 2175{
7b67c857 2176 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2177 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2178 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2179 u8 type;
2180 int err;
2181 int n = 0;
8d549c4f 2182 struct net *net = sock_net(skb->sk);
5c79de6e 2183
35a7aa08 2184 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2185 return -EINVAL;
5c79de6e 2186
13c1d189
AE		 2187 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2188
5424f32e 2189 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2190 if (err)
2191 return err;
2192
13c1d189 2193 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2194 if (err)
2195 return err;
2196
2197 if (!n)
2198 return 0;
2199
8d549c4f 2200 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
5c79de6e
SS		 2201
2202 return 0;
2203}
2204#else
2205static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2206 struct nlattr **attrs)
5c79de6e
SS		 2207{
2208 return -ENOPROTOOPT;
2209}
2210#endif
2211
2212#ifdef CONFIG_XFRM_MIGRATE
183cad12 2213static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2214{
2215 struct xfrm_user_migrate um;
2216
2217 memset(&um, 0, sizeof(um));
2218 um.proto = m->proto;
2219 um.mode = m->mode;
2220 um.reqid = m->reqid;
2221 um.old_family = m->old_family;
2222 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2223 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2224 um.new_family = m->new_family;
2225 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2226 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2227
c0144bea 2228 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2229}
2230
183cad12 2231static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2232{
2233 struct xfrm_user_kmaddress uk;
2234
2235 memset(&uk, 0, sizeof(uk));
2236 uk.family = k->family;
2237 uk.reserved = k->reserved;
2238 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2239 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2240
2241 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2242}
2243
2244static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 2245{
2246 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 2247 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2248 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2249 + userpolicy_type_attrsize();
7deb2264
TG		 2250}
2251
183cad12
DM		 2252static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2253 int num_migrate, const struct xfrm_kmaddress *k,
2254 const struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e 2255{
183cad12 2256 const struct xfrm_migrate *mp;
5c79de6e
SS		 2257 struct xfrm_userpolicy_id *pol_id;
2258 struct nlmsghdr *nlh;
1d1e34dd 2259 int i, err;
5c79de6e 2260
79b8b7f4
TG		 2261 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2262 if (nlh == NULL)
2263 return -EMSGSIZE;
5c79de6e 2264
7b67c857 2265 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2266 /* copy data from selector, dir, and type to the pol_id */
2267 memset(pol_id, 0, sizeof(*pol_id));
2268 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2269 pol_id->dir = dir;
2270
1d1e34dd
DM		 2271 if (k != NULL) {
2272 err = copy_to_user_kmaddress(k, skb);
2273 if (err)
2274 goto out_cancel;
2275 }
2276 err = copy_to_user_policy_type(type, skb);
2277 if (err)
2278 goto out_cancel;
5c79de6e 2279 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2280 err = copy_to_user_migrate(mp, skb);
2281 if (err)
2282 goto out_cancel;
5c79de6e
SS		 2283 }
2284
9825069d 2285 return nlmsg_end(skb, nlh);
1d1e34dd
DM		 2286
2287out_cancel:
9825069d 2288 nlmsg_cancel(skb, nlh);
1d1e34dd 2289 return err;
5c79de6e
SS		 2290}
2291
183cad12
DM		 2292static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2293 const struct xfrm_migrate *m, int num_migrate,
2294 const struct xfrm_kmaddress *k)
5c79de6e 2295{
a6483b79 2296 struct net *net = &init_net;
5c79de6e 2297 struct sk_buff *skb;
5c79de6e 2298
13c1d189 2299 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2300 if (skb == NULL)
2301 return -ENOMEM;
2302
2303 /* build migrate */
13c1d189 2304 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2305 BUG();
2306
21ee543e 2307 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
5c79de6e
SS		 2308}
2309#else
183cad12
DM		 2310static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2311 const struct xfrm_migrate *m, int num_migrate,
2312 const struct xfrm_kmaddress *k)
5c79de6e
SS		 2313{
2314 return -ENOPROTOOPT;
2315}
2316#endif
d51d081d 2317
a7bd9a45 2318#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2319
2320static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2321 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2322 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2323 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2324 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2325 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2326 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2327 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2328 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2329 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2330 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2331 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2332 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2333 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2334 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2335 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2336 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2337 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2338 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45 2339 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
880a6fab 2340 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
a7bd9a45 2341 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2342};
2343
492b558b
TG		 2344#undef XMSGSIZE
2345
cf5cb79f 2346static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2347 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2348 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2349 [XFRMA_LASTUSED] = { .type = NLA_U64},
2350 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2351 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2352 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2353 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2354 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2355 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2356 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2357 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2358 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2359 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2360 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2361 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2362 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2363 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2364 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2365 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2366 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2367 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2368 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2369 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2370 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
d3623099 2371 [XFRMA_PROTO] = { .type = NLA_U8 },
870a2df4 2372 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
cf5cb79f
TG		 2373};
2374
880a6fab
CG		 2375static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2376 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2377 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2378};
2379
05600a79 2380static const struct xfrm_link {
5424f32e 2381 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2382 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2383 int (*done)(struct netlink_callback *);
880a6fab
CG		 2384 const struct nla_policy *nla_pol;
2385 int nla_max;
492b558b
TG		 2386} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2387 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2388 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2389 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2390 .dump = xfrm_dump_sa,
2391 .done = xfrm_dump_sa_done },
492b558b
TG		 2392 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2393 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2394 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2395 .dump = xfrm_dump_policy,
2396 .done = xfrm_dump_policy_done },
492b558b 2397 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2398 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2399 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2400 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2401 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2402 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2403 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2404 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2405 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2406 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2407 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2408 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
880a6fab
CG		 2409 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2410 .nla_pol = xfrma_spd_policy,
2411 .nla_max = XFRMA_SPD_MAX },
ecfd6b18 2412 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2413};
2414
1d00a4eb 2415static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2416{
a6483b79 2417 struct net *net = sock_net(skb->sk);
35a7aa08 2418 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2419 const struct xfrm_link *link;
a7bd9a45 2420 int type, err;
1da177e4 2421
1da177e4 2422 type = nlh->nlmsg_type;
1da177e4 2423 if (type > XFRM_MSG_MAX)
1d00a4eb 2424 return -EINVAL;
1da177e4
LT		 2425
2426 type -= XFRM_MSG_BASE;
2427 link = &xfrm_dispatch[type];
2428
2429 /* All operations require privileges, even GET */
90f62cf3 2430 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 2431 return -EPERM;
1da177e4 2432
492b558b
TG		 2433 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2434 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2435 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2436 if (link->dump == NULL)
1d00a4eb 2437 return -EINVAL;
88fc2c84 2438
80d326fa
PNA		 2439 {
2440 struct netlink_dump_control c = {
2441 .dump = link->dump,
2442 .done = link->done,
2443 };
2444 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2445 }
1da177e4
LT		 2446 }
2447
880a6fab
CG		 2448 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2449 link->nla_max ? : XFRMA_MAX,
2450 link->nla_pol ? : xfrma_policy);
a7bd9a45
TG		 2451 if (err < 0)
2452 return err;
1da177e4
LT		 2453
2454 if (link->doit == NULL)
1d00a4eb 2455 return -EINVAL;
1da177e4 2456
5424f32e 2457 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2458}
2459
cd40b7d3 2460static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2461{
283bc9f3
FD		 2462 struct net *net = sock_net(skb->sk);
2463
2464 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2465 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2466 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2467}
2468
7deb2264
TG		 2469static inline size_t xfrm_expire_msgsize(void)
2470{
6f26b61e
JHS		 2471 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2472 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2473}
2474
214e005b 2475static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2476{
2477 struct xfrm_user_expire *ue;
2478 struct nlmsghdr *nlh;
1d1e34dd 2479 int err;
1da177e4 2480
15e47304 2481 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2482 if (nlh == NULL)
2483 return -EMSGSIZE;
1da177e4 2484
7b67c857 2485 ue = nlmsg_data(nlh);
1da177e4 2486 copy_to_user_state(x, &ue->state);
d51d081d 2487 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2488
1d1e34dd
DM		 2489 err = xfrm_mark_put(skb, &x->mark);
2490 if (err)
2491 return err;
6f26b61e 2492
9825069d 2493 return nlmsg_end(skb, nlh);
1da177e4
LT		 2494}
2495
214e005b 2496static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2497{
fc34acd3 2498 struct net *net = xs_net(x);
1da177e4
LT		 2499 struct sk_buff *skb;
2500
7deb2264 2501 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2502 if (skb == NULL)
2503 return -ENOMEM;
2504
6f26b61e
JHS		 2505 if (build_expire(skb, x, c) < 0) {
2506 kfree_skb(skb);
2507 return -EMSGSIZE;
2508 }
1da177e4 2509
21ee543e 2510 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2511}
2512
214e005b 2513static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2514{
fc34acd3 2515 struct net *net = xs_net(x);
d51d081d 2516 struct sk_buff *skb;
d51d081d 2517
d8647b79 2518 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2519 if (skb == NULL)
2520 return -ENOMEM;
2521
2522 if (build_aevent(skb, x, c) < 0)
2523 BUG();
2524
21ee543e 2525 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
d51d081d
JHS		 2526}
2527
214e005b 2528static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2529{
7067802e 2530 struct net *net = c->net;
26b15dad
JHS		 2531 struct xfrm_usersa_flush *p;
2532 struct nlmsghdr *nlh;
2533 struct sk_buff *skb;
7deb2264 2534 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2535
7deb2264 2536 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2537 if (skb == NULL)
2538 return -ENOMEM;
26b15dad 2539
15e47304 2540 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2541 if (nlh == NULL) {
2542 kfree_skb(skb);
2543 return -EMSGSIZE;
2544 }
26b15dad 2545
7b67c857 2546 p = nlmsg_data(nlh);
bf08867f 2547 p->proto = c->data.proto;
26b15dad 2548
9825069d 2549 nlmsg_end(skb, nlh);
26b15dad 2550
21ee543e 2551 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad
JHS		 2552}
2553
7deb2264 2554static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2555{
7deb2264 2556 size_t l = 0;
1a6509d9
HX		 2557 if (x->aead)
2558 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2559 if (x->aalg) {
2560 l += nla_total_size(sizeof(struct xfrm_algo) +
2561 (x->aalg->alg_key_len + 7) / 8);
2562 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2563 }
26b15dad 2564 if (x->ealg)
0f99be0d 2565 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2566 if (x->calg)
7deb2264 2567 l += nla_total_size(sizeof(*x->calg));
26b15dad 2568 if (x->encap)
7deb2264 2569 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2570 if (x->tfcpad)
2571 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2572 if (x->replay_esn)
2573 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
f293a5e3 2574 else
2575 l += nla_total_size(sizeof(struct xfrm_replay_state));
68325d3b
HX		 2576 if (x->security)
2577 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2578 x->security->ctx_len);
2579 if (x->coaddr)
2580 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2581 if (x->props.extra_flags)
2582 l += nla_total_size(sizeof(x->props.extra_flags));
68325d3b 2583
d26f3984
HX		 2584 /* Must count x->lastused as it may become non-zero behind our back. */
2585 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2586
2587 return l;
2588}
2589
214e005b 2590static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2591{
fc34acd3 2592 struct net *net = xs_net(x);
26b15dad 2593 struct xfrm_usersa_info *p;
0603eac0 2594 struct xfrm_usersa_id *id;
26b15dad
JHS		 2595 struct nlmsghdr *nlh;
2596 struct sk_buff *skb;
26b15dad 2597 int len = xfrm_sa_len(x);
1d1e34dd 2598 int headlen, err;
0603eac0
HX		 2599
2600 headlen = sizeof(*p);
2601 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2602 len += nla_total_size(headlen);
0603eac0 2603 headlen = sizeof(*id);
6f26b61e 2604 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2605 }
7deb2264 2606 len += NLMSG_ALIGN(headlen);
26b15dad 2607
7deb2264 2608 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2609 if (skb == NULL)
2610 return -ENOMEM;
26b15dad 2611
15e47304 2612 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2613 err = -EMSGSIZE;
79b8b7f4 2614 if (nlh == NULL)
1d1e34dd 2615 goto out_free_skb;
26b15dad 2616
7b67c857 2617 p = nlmsg_data(nlh);
0603eac0 2618 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2619 struct nlattr *attr;
2620
7b67c857 2621 id = nlmsg_data(nlh);
0603eac0
HX		 2622 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2623 id->spi = x->id.spi;
2624 id->family = x->props.family;
2625 id->proto = x->id.proto;
2626
c0144bea 2627 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2628 err = -EMSGSIZE;
c0144bea 2629 if (attr == NULL)
1d1e34dd 2630 goto out_free_skb;
c0144bea
TG		 2631
2632 p = nla_data(attr);
0603eac0 2633 }
1d1e34dd
DM		 2634 err = copy_to_user_state_extra(x, p, skb);
2635 if (err)
2636 goto out_free_skb;
26b15dad 2637
9825069d 2638 nlmsg_end(skb, nlh);
26b15dad 2639
21ee543e 2640 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad 2641
1d1e34dd 2642out_free_skb:
26b15dad 2643 kfree_skb(skb);
1d1e34dd 2644 return err;
26b15dad
JHS		 2645}
2646
214e005b 2647static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2648{
2649
2650 switch (c->event) {
f60f6b8f 2651 case XFRM_MSG_EXPIRE:
26b15dad 2652 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2653 case XFRM_MSG_NEWAE:
2654 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2655 case XFRM_MSG_DELSA:
2656 case XFRM_MSG_UPDSA:
2657 case XFRM_MSG_NEWSA:
26b15dad 2658 return xfrm_notify_sa(x, c);
f60f6b8f 2659 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2660 return xfrm_notify_sa_flush(c);
2661 default:
62db5cfd 2662 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2663 c->event);
2664 break;
26b15dad
JHS		 2665 }
2666
2667 return 0;
2668
2669}
2670
7deb2264
TG		 2671static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2672 struct xfrm_policy *xp)
2673{
2674 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2675 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2676 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2677 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2678 + userpolicy_type_attrsize();
2679}
2680
1da177e4 2681static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2682 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2683{
1d1e34dd 2684 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2685 struct xfrm_user_acquire *ua;
2686 struct nlmsghdr *nlh;
1d1e34dd 2687 int err;
1da177e4 2688
79b8b7f4
TG		 2689 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2690 if (nlh == NULL)
2691 return -EMSGSIZE;
1da177e4 2692
7b67c857 2693 ua = nlmsg_data(nlh);
1da177e4
LT		 2694 memcpy(&ua->id, &x->id, sizeof(ua->id));
2695 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2696 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2697 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2698 ua->aalgos = xt->aalgos;
2699 ua->ealgos = xt->ealgos;
2700 ua->calgos = xt->calgos;
2701 ua->seq = x->km.seq = seq;
2702
1d1e34dd
DM		 2703 err = copy_to_user_tmpl(xp, skb);
2704 if (!err)
2705 err = copy_to_user_state_sec_ctx(x, skb);
2706 if (!err)
2707 err = copy_to_user_policy_type(xp->type, skb);
2708 if (!err)
2709 err = xfrm_mark_put(skb, &xp->mark);
2710 if (err) {
2711 nlmsg_cancel(skb, nlh);
2712 return err;
2713 }
1da177e4 2714
9825069d 2715 return nlmsg_end(skb, nlh);
1da177e4
LT		 2716}
2717
2718static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2719 struct xfrm_policy *xp)
1da177e4 2720{
a6483b79 2721 struct net *net = xs_net(x);
1da177e4 2722 struct sk_buff *skb;
1da177e4 2723
7deb2264 2724 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2725 if (skb == NULL)
2726 return -ENOMEM;
2727
65e0736b 2728 if (build_acquire(skb, x, xt, xp) < 0)
1da177e4
LT		 2729 BUG();
2730
21ee543e 2731 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
1da177e4
LT		 2732}
2733
2734/* User gives us xfrm_user_policy_info followed by an array of 0
2735 * or more templates.
2736 */
cb969f07 2737static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2738 u8 *data, int len, int *dir)
2739{
fc34acd3 2740 struct net *net = sock_net(sk);
1da177e4
LT		 2741 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2742 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2743 struct xfrm_policy *xp;
2744 int nr;
2745
cb969f07 2746 switch (sk->sk_family) {
1da177e4
LT		 2747 case AF_INET:
2748 if (opt != IP_XFRM_POLICY) {
2749 *dir = -EOPNOTSUPP;
2750 return NULL;
2751 }
2752 break;
dfd56b8b 2753#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2754 case AF_INET6:
2755 if (opt != IPV6_XFRM_POLICY) {
2756 *dir = -EOPNOTSUPP;
2757 return NULL;
2758 }
2759 break;
2760#endif
2761 default:
2762 *dir = -EINVAL;
2763 return NULL;
2764 }
2765
2766 *dir = -EINVAL;
2767
2768 if (len < sizeof(*p) ||
2769 verify_newpolicy_info(p))
2770 return NULL;
2771
2772 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2773 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2774 return NULL;
2775
a4f1bac6
HX		 2776 if (p->dir > XFRM_POLICY_OUT)
2777 return NULL;
2778
2f09a4d5 2779 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2780 if (xp == NULL) {
2781 *dir = -ENOBUFS;
2782 return NULL;
2783 }
2784
2785 copy_from_user_policy(xp, p);
f7b6983f 2786 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2787 copy_templates(xp, ut, nr);
2788
2789 *dir = p->dir;
2790
2791 return xp;
2792}
2793
7deb2264
TG		 2794static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2795{
2796 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2797 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2798 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2799 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2800 + userpolicy_type_attrsize();
2801}
2802
1da177e4 2803static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2804 int dir, const struct km_event *c)
1da177e4
LT		 2805{
2806 struct xfrm_user_polexpire *upe;
d51d081d 2807 int hard = c->data.hard;
1d1e34dd
DM		 2808 struct nlmsghdr *nlh;
2809 int err;
1da177e4 2810
15e47304 2811 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2812 if (nlh == NULL)
2813 return -EMSGSIZE;
1da177e4 2814
7b67c857 2815 upe = nlmsg_data(nlh);
1da177e4 2816 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2817 err = copy_to_user_tmpl(xp, skb);
2818 if (!err)
2819 err = copy_to_user_sec_ctx(xp, skb);
2820 if (!err)
2821 err = copy_to_user_policy_type(xp->type, skb);
2822 if (!err)
2823 err = xfrm_mark_put(skb, &xp->mark);
2824 if (err) {
2825 nlmsg_cancel(skb, nlh);
2826 return err;
2827 }
1da177e4
LT		 2828 upe->hard = !!hard;
2829
9825069d 2830 return nlmsg_end(skb, nlh);
1da177e4
LT		 2831}
2832
214e005b 2833static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2834{
fc34acd3 2835 struct net *net = xp_net(xp);
1da177e4 2836 struct sk_buff *skb;
1da177e4 2837
7deb2264 2838 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2839 if (skb == NULL)
2840 return -ENOMEM;
2841
d51d081d 2842 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2843 BUG();
2844
21ee543e 2845 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2846}
2847
214e005b 2848static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2849{
1d1e34dd 2850 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 2851 struct net *net = xp_net(xp);
26b15dad 2852 struct xfrm_userpolicy_info *p;
0603eac0 2853 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2854 struct nlmsghdr *nlh;
2855 struct sk_buff *skb;
1d1e34dd 2856 int headlen, err;
0603eac0
HX		 2857
2858 headlen = sizeof(*p);
2859 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2860 len += nla_total_size(headlen);
0603eac0
HX		 2861 headlen = sizeof(*id);
2862 }
cfbfd45a 2863 len += userpolicy_type_attrsize();
295fae56 2864 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2865 len += NLMSG_ALIGN(headlen);
26b15dad 2866
7deb2264 2867 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2868 if (skb == NULL)
2869 return -ENOMEM;
26b15dad 2870
15e47304 2871 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2872 err = -EMSGSIZE;
79b8b7f4 2873 if (nlh == NULL)
1d1e34dd 2874 goto out_free_skb;
26b15dad 2875
7b67c857 2876 p = nlmsg_data(nlh);
0603eac0 2877 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2878 struct nlattr *attr;
2879
7b67c857 2880 id = nlmsg_data(nlh);
0603eac0
HX		 2881 memset(id, 0, sizeof(*id));
2882 id->dir = dir;
2883 if (c->data.byid)
2884 id->index = xp->index;
2885 else
2886 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2887
c0144bea 2888 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 2889 err = -EMSGSIZE;
c0144bea 2890 if (attr == NULL)
1d1e34dd 2891 goto out_free_skb;
c0144bea
TG		 2892
2893 p = nla_data(attr);
0603eac0 2894 }
26b15dad 2895
26b15dad 2896 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 2897 err = copy_to_user_tmpl(xp, skb);
2898 if (!err)
2899 err = copy_to_user_policy_type(xp->type, skb);
2900 if (!err)
2901 err = xfrm_mark_put(skb, &xp->mark);
2902 if (err)
2903 goto out_free_skb;
295fae56 2904
9825069d 2905 nlmsg_end(skb, nlh);
26b15dad 2906
21ee543e 2907 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 2908
1d1e34dd 2909out_free_skb:
26b15dad 2910 kfree_skb(skb);
1d1e34dd 2911 return err;
26b15dad
JHS		 2912}
2913
214e005b 2914static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 2915{
7067802e 2916 struct net *net = c->net;
26b15dad
JHS		 2917 struct nlmsghdr *nlh;
2918 struct sk_buff *skb;
1d1e34dd 2919 int err;
26b15dad 2920
7deb2264 2921 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2922 if (skb == NULL)
2923 return -ENOMEM;
26b15dad 2924
15e47304 2925 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 2926 err = -EMSGSIZE;
79b8b7f4 2927 if (nlh == NULL)
1d1e34dd
DM		 2928 goto out_free_skb;
2929 err = copy_to_user_policy_type(c->data.type, skb);
2930 if (err)
2931 goto out_free_skb;
26b15dad 2932
9825069d 2933 nlmsg_end(skb, nlh);
26b15dad 2934
21ee543e 2935 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 2936
1d1e34dd 2937out_free_skb:
26b15dad 2938 kfree_skb(skb);
1d1e34dd 2939 return err;
26b15dad
JHS		 2940}
2941
214e005b 2942static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2943{
2944
2945 switch (c->event) {
f60f6b8f
HX		 2946 case XFRM_MSG_NEWPOLICY:
2947 case XFRM_MSG_UPDPOLICY:
2948 case XFRM_MSG_DELPOLICY:
26b15dad 2949 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2950 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2951 return xfrm_notify_policy_flush(c);
f60f6b8f 2952 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2953 return xfrm_exp_policy_notify(xp, dir, c);
2954 default:
62db5cfd 2955 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2956 c->event);
26b15dad
JHS		 2957 }
2958
2959 return 0;
2960
2961}
2962
7deb2264
TG		 2963static inline size_t xfrm_report_msgsize(void)
2964{
2965 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2966}
2967
97a64b45
MN		 2968static int build_report(struct sk_buff *skb, u8 proto,
2969 struct xfrm_selector *sel, xfrm_address_t *addr)
2970{
2971 struct xfrm_user_report *ur;
2972 struct nlmsghdr *nlh;
97a64b45 2973
79b8b7f4
TG		 2974 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2975 if (nlh == NULL)
2976 return -EMSGSIZE;
97a64b45 2977
7b67c857 2978 ur = nlmsg_data(nlh);
97a64b45
MN		 2979 ur->proto = proto;
2980 memcpy(&ur->sel, sel, sizeof(ur->sel));
2981
1d1e34dd
DM		 2982 if (addr) {
2983 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2984 if (err) {
2985 nlmsg_cancel(skb, nlh);
2986 return err;
2987 }
2988 }
9825069d 2989 return nlmsg_end(skb, nlh);
97a64b45
MN		 2990}
2991
db983c11
AD		 2992static int xfrm_send_report(struct net *net, u8 proto,
2993 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2994{
2995 struct sk_buff *skb;
97a64b45 2996
7deb2264 2997 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2998 if (skb == NULL)
2999 return -ENOMEM;
3000
3001 if (build_report(skb, proto, sel, addr) < 0)
3002 BUG();
3003
21ee543e 3004 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
97a64b45
MN		 3005}
3006
3a2dfbe8
MW		 3007static inline size_t xfrm_mapping_msgsize(void)
3008{
3009 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3010}
3011
3012static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3013 xfrm_address_t *new_saddr, __be16 new_sport)
3014{
3015 struct xfrm_user_mapping *um;
3016 struct nlmsghdr *nlh;
3017
3018 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3019 if (nlh == NULL)
3020 return -EMSGSIZE;
3021
3022 um = nlmsg_data(nlh);
3023
3024 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3025 um->id.spi = x->id.spi;
3026 um->id.family = x->props.family;
3027 um->id.proto = x->id.proto;
3028 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3029 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3030 um->new_sport = new_sport;
3031 um->old_sport = x->encap->encap_sport;
3032 um->reqid = x->props.reqid;
3033
3034 return nlmsg_end(skb, nlh);
3035}
3036
3037static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3038 __be16 sport)
3039{
a6483b79 3040 struct net *net = xs_net(x);
3a2dfbe8
MW		 3041 struct sk_buff *skb;
3042
3043 if (x->id.proto != IPPROTO_ESP)
3044 return -EINVAL;
3045
3046 if (!x->encap)
3047 return -EINVAL;
3048
3049 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3050 if (skb == NULL)
3051 return -ENOMEM;
3052
3053 if (build_mapping(skb, x, ipaddr, sport) < 0)
3054 BUG();
3055
21ee543e 3056 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3a2dfbe8
MW		 3057}
3058
0f24558e
HG		 3059static bool xfrm_is_alive(const struct km_event *c)
3060{
3061 return (bool)xfrm_acquire_is_on(c->net);
3062}
3063
1da177e4
LT		 3064static struct xfrm_mgr netlink_mgr = {
3065 .id = "netlink",
3066 .notify = xfrm_send_state_notify,
3067 .acquire = xfrm_send_acquire,
3068 .compile_policy = xfrm_compile_policy,
3069 .notify_policy = xfrm_send_policy_notify,
97a64b45 3070 .report = xfrm_send_report,
5c79de6e 3071 .migrate = xfrm_send_migrate,
3a2dfbe8 3072 .new_mapping = xfrm_send_mapping,
0f24558e 3073 .is_alive = xfrm_is_alive,
1da177e4
LT		 3074};
3075
a6483b79 3076static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 3077{
be33690d 3078 struct sock *nlsk;
a31f2d17
PNA		 3079 struct netlink_kernel_cfg cfg = {
3080 .groups = XFRMNLGRP_MAX,
3081 .input = xfrm_netlink_rcv,
3082 };
be33690d 3083
9f00d977 3084 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3085 if (nlsk == NULL)
1da177e4 3086 return -ENOMEM;
d79d792e 3087 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3088 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3089 return 0;
3090}
3091
d79d792e 3092static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3093{
d79d792e
EB		 3094 struct net *net;
3095 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3096 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3097 synchronize_net();
3098 list_for_each_entry(net, net_exit_list, exit_list)
3099 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3100}
3101
a6483b79 3102static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3103 .init = xfrm_user_net_init,
3104 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3105};
3106
3107static int __init xfrm_user_init(void)
3108{
3109 int rv;
3110
3111 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3112
3113 rv = register_pernet_subsys(&xfrm_user_net_ops);
3114 if (rv < 0)
3115 return rv;
3116 rv = xfrm_register_km(&netlink_mgr);
3117 if (rv < 0)
3118 unregister_pernet_subsys(&xfrm_user_net_ops);
3119 return rv;
3120}
3121
3122static void __exit xfrm_user_exit(void)
3123{
3124 xfrm_unregister_km(&netlink_mgr);
3125 unregister_pernet_subsys(&xfrm_user_net_ops);
3126}
3127
1da177e4
LT		 3128module_init(xfrm_user_init);
3129module_exit(xfrm_user_exit);
3130MODULE_LICENSE("GPL");
4fdb3bb7 3131MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3132
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