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xfrm: Remove useless secid field from xfrm_audit.
[mirror_ubuntu-hirsute-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] ||
ea9884b3
FD		 180 attrs[XFRMA_TFCPAD] ||
181 (ntohl(p->id.spi) >= 0x10000))
182
1da177e4
LT		 183 goto out;
184 break;
185
186 case IPPROTO_ESP:
1a6509d9
HX		 187 if (attrs[XFRMA_ALG_COMP])
188 goto out;
189 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 190 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 191 !attrs[XFRMA_ALG_CRYPT] &&
192 !attrs[XFRMA_ALG_AEAD])
193 goto out;
194 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 195 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 196 attrs[XFRMA_ALG_CRYPT]) &&
197 attrs[XFRMA_ALG_AEAD])
1da177e4 198 goto out;
35d2856b
MW		 199 if (attrs[XFRMA_TFCPAD] &&
200 p->mode != XFRM_MODE_TUNNEL)
201 goto out;
1da177e4
LT		 202 break;
203
204 case IPPROTO_COMP:
35a7aa08 205 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 206 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 207 attrs[XFRMA_ALG_AUTH] ||
4447bb33 208 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b
MW		 209 attrs[XFRMA_ALG_CRYPT] ||
210 attrs[XFRMA_TFCPAD])
1da177e4
LT		 211 goto out;
212 break;
213
dfd56b8b 214#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 215 case IPPROTO_DSTOPTS:
216 case IPPROTO_ROUTING:
35a7aa08
TG		 217 if (attrs[XFRMA_ALG_COMP] ||
218 attrs[XFRMA_ALG_AUTH] ||
4447bb33 219 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 220 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 221 attrs[XFRMA_ALG_CRYPT] ||
222 attrs[XFRMA_ENCAP] ||
223 attrs[XFRMA_SEC_CTX] ||
35d2856b 224 attrs[XFRMA_TFCPAD] ||
35a7aa08 225 !attrs[XFRMA_COADDR])
e23c7194
MN		 226 goto out;
227 break;
228#endif
229
1da177e4
LT		 230 default:
231 goto out;
3ff50b79 232 }
1da177e4 233
1a6509d9
HX		 234 if ((err = verify_aead(attrs)))
235 goto out;
4447bb33
MW		 236 if ((err = verify_auth_trunc(attrs)))
237 goto out;
35a7aa08 238 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 239 goto out;
35a7aa08 240 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 241 goto out;
35a7aa08 242 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 243 goto out;
35a7aa08 244 if ((err = verify_sec_ctx_len(attrs)))
df71837d 245 goto out;
d8647b79
SK		 246 if ((err = verify_replay(p, attrs)))
247 goto out;
1da177e4
LT		 248
249 err = -EINVAL;
250 switch (p->mode) {
7e49e6de
MN		 251 case XFRM_MODE_TRANSPORT:
252 case XFRM_MODE_TUNNEL:
060f02a3 253 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 254 case XFRM_MODE_BEET:
1da177e4
LT		 255 break;
256
257 default:
258 goto out;
3ff50b79 259 }
1da177e4
LT		 260
261 err = 0;
262
263out:
264 return err;
265}
266
267static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 268 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 269 struct nlattr *rta)
1da177e4 270{
1da177e4
LT		 271 struct xfrm_algo *p, *ualg;
272 struct xfrm_algo_desc *algo;
273
274 if (!rta)
275 return 0;
276
5424f32e 277 ualg = nla_data(rta);
1da177e4
LT		 278
279 algo = get_byname(ualg->alg_name, 1);
280 if (!algo)
281 return -ENOSYS;
282 *props = algo->desc.sadb_alg_id;
283
0f99be0d 284 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 285 if (!p)
286 return -ENOMEM;
287
04ff1260 288 strcpy(p->alg_name, algo->name);
1da177e4
LT		 289 *algpp = p;
290 return 0;
291}
292
4447bb33
MW		 293static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
294 struct nlattr *rta)
295{
296 struct xfrm_algo *ualg;
297 struct xfrm_algo_auth *p;
298 struct xfrm_algo_desc *algo;
299
300 if (!rta)
301 return 0;
302
303 ualg = nla_data(rta);
304
305 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
306 if (!algo)
307 return -ENOSYS;
308 *props = algo->desc.sadb_alg_id;
309
310 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
311 if (!p)
312 return -ENOMEM;
313
314 strcpy(p->alg_name, algo->name);
315 p->alg_key_len = ualg->alg_key_len;
316 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
317 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
318
319 *algpp = p;
320 return 0;
321}
322
323static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
324 struct nlattr *rta)
325{
326 struct xfrm_algo_auth *p, *ualg;
327 struct xfrm_algo_desc *algo;
328
329 if (!rta)
330 return 0;
331
332 ualg = nla_data(rta);
333
334 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
335 if (!algo)
336 return -ENOSYS;
fa6dd8a2
ND		 337 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
338 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 339 return -EINVAL;
340 *props = algo->desc.sadb_alg_id;
341
342 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
343 if (!p)
344 return -ENOMEM;
345
346 strcpy(p->alg_name, algo->name);
347 if (!p->alg_trunc_len)
348 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
349
350 *algpp = p;
351 return 0;
352}
353
1a6509d9
HX		 354static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
355 struct nlattr *rta)
356{
357 struct xfrm_algo_aead *p, *ualg;
358 struct xfrm_algo_desc *algo;
359
360 if (!rta)
361 return 0;
362
363 ualg = nla_data(rta);
364
365 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
366 if (!algo)
367 return -ENOSYS;
368 *props = algo->desc.sadb_alg_id;
369
370 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
371 if (!p)
372 return -ENOMEM;
373
374 strcpy(p->alg_name, algo->name);
375 *algpp = p;
376 return 0;
377}
378
e2b19125
SK		 379static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
380 struct nlattr *rp)
381{
382 struct xfrm_replay_state_esn *up;
ecd79187 383 int ulen;
e2b19125
SK		 384
385 if (!replay_esn || !rp)
386 return 0;
387
388 up = nla_data(rp);
ecd79187 389 ulen = xfrm_replay_state_esn_len(up);
e2b19125 390
ecd79187 391 if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
e2b19125
SK		 392 return -EINVAL;
393
394 return 0;
395}
396
d8647b79
SK		 397static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
398 struct xfrm_replay_state_esn **preplay_esn,
399 struct nlattr *rta)
400{
401 struct xfrm_replay_state_esn *p, *pp, *up;
ecd79187 402 int klen, ulen;
d8647b79
SK		 403
404 if (!rta)
405 return 0;
406
407 up = nla_data(rta);
ecd79187
MK		 408 klen = xfrm_replay_state_esn_len(up);
409 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
d8647b79 410
ecd79187 411 p = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 412 if (!p)
413 return -ENOMEM;
414
ecd79187 415 pp = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 416 if (!pp) {
417 kfree(p);
418 return -ENOMEM;
419 }
420
ecd79187
MK		 421 memcpy(p, up, ulen);
422 memcpy(pp, up, ulen);
423
d8647b79
SK		 424 *replay_esn = p;
425 *preplay_esn = pp;
426
427 return 0;
428}
429
661697f7 430static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 431{
df71837d
TJ		 432 int len = 0;
433
434 if (xfrm_ctx) {
435 len += sizeof(struct xfrm_user_sec_ctx);
436 len += xfrm_ctx->ctx_len;
437 }
438 return len;
439}
440
1da177e4
LT		 441static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
442{
443 memcpy(&x->id, &p->id, sizeof(x->id));
444 memcpy(&x->sel, &p->sel, sizeof(x->sel));
445 memcpy(&x->lft, &p->lft, sizeof(x->lft));
446 x->props.mode = p->mode;
33fce60d
FD		 447 x->props.replay_window = min_t(unsigned int, p->replay_window,
448 sizeof(x->replay.bitmap) * 8);
1da177e4
LT		 449 x->props.reqid = p->reqid;
450 x->props.family = p->family;
54489c14 451 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 452 x->props.flags = p->flags;
196b0036 453
ccf9b3b8 454 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 455 x->sel.family = p->family;
1da177e4
LT		 456}
457
d51d081d
JHS		 458/*
459 * someday when pfkey also has support, we could have the code
460 * somehow made shareable and move it to xfrm_state.c - JHS
461 *
462*/
e3ac104d
MK		 463static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
464 int update_esn)
d51d081d 465{
5424f32e 466 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
e3ac104d 467 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
5424f32e
TG		 468 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
469 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
470 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 471
d8647b79
SK		 472 if (re) {
473 struct xfrm_replay_state_esn *replay_esn;
474 replay_esn = nla_data(re);
475 memcpy(x->replay_esn, replay_esn,
476 xfrm_replay_state_esn_len(replay_esn));
477 memcpy(x->preplay_esn, replay_esn,
478 xfrm_replay_state_esn_len(replay_esn));
479 }
480
d51d081d
JHS		 481 if (rp) {
482 struct xfrm_replay_state *replay;
5424f32e 483 replay = nla_data(rp);
d51d081d
JHS		 484 memcpy(&x->replay, replay, sizeof(*replay));
485 memcpy(&x->preplay, replay, sizeof(*replay));
486 }
487
488 if (lt) {
489 struct xfrm_lifetime_cur *ltime;
5424f32e 490 ltime = nla_data(lt);
d51d081d
JHS		 491 x->curlft.bytes = ltime->bytes;
492 x->curlft.packets = ltime->packets;
493 x->curlft.add_time = ltime->add_time;
494 x->curlft.use_time = ltime->use_time;
495 }
496
cf5cb79f 497 if (et)
5424f32e 498 x->replay_maxage = nla_get_u32(et);
d51d081d 499
cf5cb79f 500 if (rt)
5424f32e 501 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 502}
503
fc34acd3
AD		 504static struct xfrm_state *xfrm_state_construct(struct net *net,
505 struct xfrm_usersa_info *p,
5424f32e 506 struct nlattr **attrs,
1da177e4
LT		 507 int *errp)
508{
fc34acd3 509 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 510 int err = -ENOMEM;
511
512 if (!x)
513 goto error_no_put;
514
515 copy_from_user_state(x, p);
516
a947b0a9
ND		 517 if (attrs[XFRMA_SA_EXTRA_FLAGS])
518 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
519
1a6509d9
HX		 520 if ((err = attach_aead(&x->aead, &x->props.ealgo,
521 attrs[XFRMA_ALG_AEAD])))
522 goto error;
4447bb33
MW		 523 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
524 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 525 goto error;
4447bb33
MW		 526 if (!x->props.aalgo) {
527 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
528 attrs[XFRMA_ALG_AUTH])))
529 goto error;
530 }
1da177e4
LT		 531 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
532 xfrm_ealg_get_byname,
35a7aa08 533 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 534 goto error;
535 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
536 xfrm_calg_get_byname,
35a7aa08 537 attrs[XFRMA_ALG_COMP])))
1da177e4 538 goto error;
fd21150a
TG		 539
540 if (attrs[XFRMA_ENCAP]) {
541 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
542 sizeof(*x->encap), GFP_KERNEL);
543 if (x->encap == NULL)
544 goto error;
545 }
546
35d2856b
MW		 547 if (attrs[XFRMA_TFCPAD])
548 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
549
fd21150a
TG		 550 if (attrs[XFRMA_COADDR]) {
551 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
552 sizeof(*x->coaddr), GFP_KERNEL);
553 if (x->coaddr == NULL)
554 goto error;
555 }
556
6f26b61e
JHS		 557 xfrm_mark_get(attrs, &x->mark);
558
a454f0cc 559 err = __xfrm_init_state(x, false);
1da177e4
LT		 560 if (err)
561 goto error;
562
fd21150a
TG		 563 if (attrs[XFRMA_SEC_CTX] &&
564 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 565 goto error;
566
d8647b79
SK		 567 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
568 attrs[XFRMA_REPLAY_ESN_VAL])))
569 goto error;
570
1da177e4 571 x->km.seq = p->seq;
b27aeadb 572 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 573 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 574 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 575
9fdc4883
SK		 576 if ((err = xfrm_init_replay(x)))
577 goto error;
d51d081d 578
9fdc4883 579 /* override default values from above */
e3ac104d 580 xfrm_update_ae_params(x, attrs, 0);
1da177e4
LT		 581
582 return x;
583
584error:
585 x->km.state = XFRM_STATE_DEAD;
586 xfrm_state_put(x);
587error_no_put:
588 *errp = err;
589 return NULL;
590}
591
22e70050 592static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 593 struct nlattr **attrs)
1da177e4 594{
fc34acd3 595 struct net *net = sock_net(skb->sk);
7b67c857 596 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 597 struct xfrm_state *x;
598 int err;
26b15dad 599 struct km_event c;
e1760bd5 600 kuid_t loginuid = audit_get_loginuid(current);
4440e854 601 unsigned int sessionid = audit_get_sessionid(current);
1da177e4 602
35a7aa08 603 err = verify_newsa_info(p, attrs);
1da177e4
LT		 604 if (err)
605 return err;
606
fc34acd3 607 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 608 if (!x)
609 return err;
610
26b15dad 611 xfrm_state_hold(x);
1da177e4
LT		 612 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
613 err = xfrm_state_add(x);
614 else
615 err = xfrm_state_update(x);
616
f1370cc4 617 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid);
161a09e7 618
1da177e4
LT		 619 if (err < 0) {
620 x->km.state = XFRM_STATE_DEAD;
21380b81 621 __xfrm_state_put(x);
7d6dfe1f 622 goto out;
1da177e4
LT		 623 }
624
26b15dad 625 c.seq = nlh->nlmsg_seq;
15e47304 626 c.portid = nlh->nlmsg_pid;
f60f6b8f 627 c.event = nlh->nlmsg_type;
26b15dad
JHS		 628
629 km_state_notify(x, &c);
7d6dfe1f 630out:
26b15dad 631 xfrm_state_put(x);
1da177e4
LT		 632 return err;
633}
634
fc34acd3
AD		 635static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
636 struct xfrm_usersa_id *p,
5424f32e 637 struct nlattr **attrs,
eb2971b6
MN		 638 int *errp)
639{
640 struct xfrm_state *x = NULL;
6f26b61e 641 struct xfrm_mark m;
eb2971b6 642 int err;
6f26b61e 643 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 644
645 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
646 err = -ESRCH;
6f26b61e 647 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 648 } else {
649 xfrm_address_t *saddr = NULL;
650
35a7aa08 651 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 652 if (!saddr) {
653 err = -EINVAL;
654 goto out;
655 }
656
9abbffee 657 err = -ESRCH;
6f26b61e
JHS		 658 x = xfrm_state_lookup_byaddr(net, mark,
659 &p->daddr, saddr,
221df1ed 660 p->proto, p->family);
eb2971b6
MN		 661 }
662
663 out:
664 if (!x && errp)
665 *errp = err;
666 return x;
667}
668
22e70050 669static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 670 struct nlattr **attrs)
1da177e4 671{
fc34acd3 672 struct net *net = sock_net(skb->sk);
1da177e4 673 struct xfrm_state *x;
eb2971b6 674 int err = -ESRCH;
26b15dad 675 struct km_event c;
7b67c857 676 struct xfrm_usersa_id *p = nlmsg_data(nlh);
e1760bd5 677 kuid_t loginuid = audit_get_loginuid(current);
4440e854 678 unsigned int sessionid = audit_get_sessionid(current);
1da177e4 679
fc34acd3 680 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 681 if (x == NULL)
eb2971b6 682 return err;
1da177e4 683
6f68dc37 684 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 685 goto out;
686
1da177e4 687 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 688 err = -EPERM;
689 goto out;
1da177e4
LT		 690 }
691
26b15dad 692 err = xfrm_state_delete(x);
161a09e7 693
c8c05a8e
CZ		 694 if (err < 0)
695 goto out;
26b15dad
JHS		 696
697 c.seq = nlh->nlmsg_seq;
15e47304 698 c.portid = nlh->nlmsg_pid;
f60f6b8f 699 c.event = nlh->nlmsg_type;
26b15dad 700 km_state_notify(x, &c);
1da177e4 701
c8c05a8e 702out:
f1370cc4 703 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid);
c8c05a8e 704 xfrm_state_put(x);
26b15dad 705 return err;
1da177e4
LT		 706}
707
708static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
709{
f778a636 710 memset(p, 0, sizeof(*p));
1da177e4
LT		 711 memcpy(&p->id, &x->id, sizeof(p->id));
712 memcpy(&p->sel, &x->sel, sizeof(p->sel));
713 memcpy(&p->lft, &x->lft, sizeof(p->lft));
714 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
715 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 716 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 717 p->mode = x->props.mode;
718 p->replay_window = x->props.replay_window;
719 p->reqid = x->props.reqid;
720 p->family = x->props.family;
721 p->flags = x->props.flags;
722 p->seq = x->km.seq;
723}
724
725struct xfrm_dump_info {
726 struct sk_buff *in_skb;
727 struct sk_buff *out_skb;
728 u32 nlmsg_seq;
729 u16 nlmsg_flags;
1da177e4
LT		 730};
731
c0144bea
TG		 732static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
733{
c0144bea
TG		 734 struct xfrm_user_sec_ctx *uctx;
735 struct nlattr *attr;
68325d3b 736 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 737
738 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
739 if (attr == NULL)
740 return -EMSGSIZE;
741
742 uctx = nla_data(attr);
743 uctx->exttype = XFRMA_SEC_CTX;
744 uctx->len = ctx_size;
745 uctx->ctx_doi = s->ctx_doi;
746 uctx->ctx_alg = s->ctx_alg;
747 uctx->ctx_len = s->ctx_len;
748 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
749
750 return 0;
751}
752
4447bb33
MW		 753static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
754{
755 struct xfrm_algo *algo;
756 struct nlattr *nla;
757
758 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
759 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
760 if (!nla)
761 return -EMSGSIZE;
762
763 algo = nla_data(nla);
4c87308b 764 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
4447bb33
MW		 765 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
766 algo->alg_key_len = auth->alg_key_len;
767
768 return 0;
769}
770
68325d3b
HX		 771/* Don't change this without updating xfrm_sa_len! */
772static int copy_to_user_state_extra(struct xfrm_state *x,
773 struct xfrm_usersa_info *p,
774 struct sk_buff *skb)
1da177e4 775{
1d1e34dd 776 int ret = 0;
d0fde795 777
1d1e34dd 778 copy_to_user_state(x, p);
68325d3b 779
a947b0a9
ND		 780 if (x->props.extra_flags) {
781 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
782 x->props.extra_flags);
783 if (ret)
784 goto out;
785 }
786
1d1e34dd
DM		 787 if (x->coaddr) {
788 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
789 if (ret)
790 goto out;
791 }
792 if (x->lastused) {
793 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
794 if (ret)
795 goto out;
796 }
797 if (x->aead) {
798 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
799 if (ret)
800 goto out;
801 }
802 if (x->aalg) {
803 ret = copy_to_user_auth(x->aalg, skb);
804 if (!ret)
805 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
806 xfrm_alg_auth_len(x->aalg), x->aalg);
807 if (ret)
808 goto out;
809 }
810 if (x->ealg) {
811 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
812 if (ret)
813 goto out;
814 }
815 if (x->calg) {
816 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
817 if (ret)
818 goto out;
819 }
820 if (x->encap) {
821 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
822 if (ret)
823 goto out;
824 }
825 if (x->tfcpad) {
826 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
827 if (ret)
828 goto out;
829 }
830 ret = xfrm_mark_put(skb, &x->mark);
831 if (ret)
832 goto out;
833 if (x->replay_esn) {
834 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
835 xfrm_replay_state_esn_len(x->replay_esn),
836 x->replay_esn);
837 if (ret)
838 goto out;
839 }
840 if (x->security)
841 ret = copy_sec_ctx(x->security, skb);
842out:
843 return ret;
68325d3b
HX		 844}
845
846static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
847{
848 struct xfrm_dump_info *sp = ptr;
849 struct sk_buff *in_skb = sp->in_skb;
850 struct sk_buff *skb = sp->out_skb;
851 struct xfrm_usersa_info *p;
852 struct nlmsghdr *nlh;
853 int err;
854
15e47304 855 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 856 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
857 if (nlh == NULL)
858 return -EMSGSIZE;
859
860 p = nlmsg_data(nlh);
861
862 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 863 if (err) {
864 nlmsg_cancel(skb, nlh);
865 return err;
866 }
9825069d 867 nlmsg_end(skb, nlh);
1da177e4 868 return 0;
1da177e4
LT		 869}
870
4c563f76
TT		 871static int xfrm_dump_sa_done(struct netlink_callback *cb)
872{
873 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 874 struct sock *sk = cb->skb->sk;
875 struct net *net = sock_net(sk);
876
877 xfrm_state_walk_done(walk, net);
4c563f76
TT		 878 return 0;
879}
880
d3623099 881static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
1da177e4
LT		 882static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
883{
fc34acd3 884 struct net *net = sock_net(skb->sk);
4c563f76 885 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 886 struct xfrm_dump_info info;
887
4c563f76
TT		 888 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
889 sizeof(cb->args) - sizeof(cb->args[0]));
890
1da177e4
LT		 891 info.in_skb = cb->skb;
892 info.out_skb = skb;
893 info.nlmsg_seq = cb->nlh->nlmsg_seq;
894 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 895
896 if (!cb->args[0]) {
d3623099 897 struct nlattr *attrs[XFRMA_MAX+1];
870a2df4 898 struct xfrm_address_filter *filter = NULL;
d3623099
ND		 899 u8 proto = 0;
900 int err;
901
4c563f76 902 cb->args[0] = 1;
d3623099
ND		 903
904 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX,
905 xfrma_policy);
906 if (err < 0)
907 return err;
908
870a2df4 909 if (attrs[XFRMA_ADDRESS_FILTER]) {
d3623099
ND		 910 filter = kmalloc(sizeof(*filter), GFP_KERNEL);
911 if (filter == NULL)
912 return -ENOMEM;
913
870a2df4 914 memcpy(filter, nla_data(attrs[XFRMA_ADDRESS_FILTER]),
d3623099
ND		 915 sizeof(*filter));
916 }
917
918 if (attrs[XFRMA_PROTO])
919 proto = nla_get_u8(attrs[XFRMA_PROTO]);
920
921 xfrm_state_walk_init(walk, proto, filter);
4c563f76
TT		 922 }
923
fc34acd3 924 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 925
926 return skb->len;
927}
928
929static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
930 struct xfrm_state *x, u32 seq)
931{
932 struct xfrm_dump_info info;
933 struct sk_buff *skb;
864745d2 934 int err;
1da177e4 935
7deb2264 936 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 937 if (!skb)
938 return ERR_PTR(-ENOMEM);
939
1da177e4
LT		 940 info.in_skb = in_skb;
941 info.out_skb = skb;
942 info.nlmsg_seq = seq;
943 info.nlmsg_flags = 0;
1da177e4 944
864745d2
MK		 945 err = dump_one_state(x, 0, &info);
946 if (err) {
1da177e4 947 kfree_skb(skb);
864745d2 948 return ERR_PTR(err);
1da177e4
LT		 949 }
950
951 return skb;
952}
953
7deb2264
TG		 954static inline size_t xfrm_spdinfo_msgsize(void)
955{
956 return NLMSG_ALIGN(4)
957 + nla_total_size(sizeof(struct xfrmu_spdinfo))
958 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
959}
960
e071041b 961static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 962 u32 portid, u32 seq, u32 flags)
ecfd6b18 963{
5a6d3416
JHS		 964 struct xfrmk_spdinfo si;
965 struct xfrmu_spdinfo spc;
966 struct xfrmu_spdhinfo sph;
ecfd6b18 967 struct nlmsghdr *nlh;
1d1e34dd 968 int err;
ecfd6b18
JHS		 969 u32 *f;
970
15e47304 971 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 972 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 973 return -EMSGSIZE;
974
975 f = nlmsg_data(nlh);
976 *f = flags;
e071041b 977 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 978 spc.incnt = si.incnt;
979 spc.outcnt = si.outcnt;
980 spc.fwdcnt = si.fwdcnt;
981 spc.inscnt = si.inscnt;
982 spc.outscnt = si.outscnt;
983 spc.fwdscnt = si.fwdscnt;
984 sph.spdhcnt = si.spdhcnt;
985 sph.spdhmcnt = si.spdhmcnt;
986
1d1e34dd
DM		 987 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
988 if (!err)
989 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
990 if (err) {
991 nlmsg_cancel(skb, nlh);
992 return err;
993 }
ecfd6b18
JHS		 994
995 return nlmsg_end(skb, nlh);
ecfd6b18
JHS		 996}
997
998static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 999 struct nlattr **attrs)
ecfd6b18 1000{
a6483b79 1001 struct net *net = sock_net(skb->sk);
ecfd6b18 1002 struct sk_buff *r_skb;
7b67c857 1003 u32 *flags = nlmsg_data(nlh);
15e47304 1004 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 1005 u32 seq = nlh->nlmsg_seq;
ecfd6b18 1006
7deb2264 1007 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 1008 if (r_skb == NULL)
1009 return -ENOMEM;
1010
15e47304 1011 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
ecfd6b18
JHS		 1012 BUG();
1013
15e47304 1014 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 1015}
1016
7deb2264
TG		 1017static inline size_t xfrm_sadinfo_msgsize(void)
1018{
1019 return NLMSG_ALIGN(4)
1020 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1021 + nla_total_size(4); /* XFRMA_SAD_CNT */
1022}
1023
e071041b 1024static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1025 u32 portid, u32 seq, u32 flags)
28d8909b 1026{
af11e316
JHS		 1027 struct xfrmk_sadinfo si;
1028 struct xfrmu_sadhinfo sh;
28d8909b 1029 struct nlmsghdr *nlh;
1d1e34dd 1030 int err;
28d8909b
JHS		 1031 u32 *f;
1032
15e47304 1033 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1034 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1035 return -EMSGSIZE;
1036
1037 f = nlmsg_data(nlh);
1038 *f = flags;
e071041b 1039 xfrm_sad_getinfo(net, &si);
28d8909b 1040
af11e316
JHS		 1041 sh.sadhmcnt = si.sadhmcnt;
1042 sh.sadhcnt = si.sadhcnt;
1043
1d1e34dd
DM		 1044 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1045 if (!err)
1046 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1047 if (err) {
1048 nlmsg_cancel(skb, nlh);
1049 return err;
1050 }
28d8909b
JHS		 1051
1052 return nlmsg_end(skb, nlh);
28d8909b
JHS		 1053}
1054
1055static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1056 struct nlattr **attrs)
28d8909b 1057{
a6483b79 1058 struct net *net = sock_net(skb->sk);
28d8909b 1059 struct sk_buff *r_skb;
7b67c857 1060 u32 *flags = nlmsg_data(nlh);
15e47304 1061 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1062 u32 seq = nlh->nlmsg_seq;
28d8909b 1063
7deb2264 1064 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1065 if (r_skb == NULL)
1066 return -ENOMEM;
1067
15e47304 1068 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
28d8909b
JHS		 1069 BUG();
1070
15e47304 1071 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1072}
1073
22e70050 1074static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1075 struct nlattr **attrs)
1da177e4 1076{
fc34acd3 1077 struct net *net = sock_net(skb->sk);
7b67c857 1078 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1079 struct xfrm_state *x;
1080 struct sk_buff *resp_skb;
eb2971b6 1081 int err = -ESRCH;
1da177e4 1082
fc34acd3 1083 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1084 if (x == NULL)
1085 goto out_noput;
1086
1087 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1088 if (IS_ERR(resp_skb)) {
1089 err = PTR_ERR(resp_skb);
1090 } else {
15e47304 1091 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1092 }
1093 xfrm_state_put(x);
1094out_noput:
1095 return err;
1096}
1097
22e70050 1098static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1099 struct nlattr **attrs)
1da177e4 1100{
fc34acd3 1101 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1102 struct xfrm_state *x;
1103 struct xfrm_userspi_info *p;
1104 struct sk_buff *resp_skb;
1105 xfrm_address_t *daddr;
1106 int family;
1107 int err;
6f26b61e
JHS		 1108 u32 mark;
1109 struct xfrm_mark m;
1da177e4 1110
7b67c857 1111 p = nlmsg_data(nlh);
776e9dd9 1112 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1113 if (err)
1114 goto out_noput;
1115
1116 family = p->info.family;
1117 daddr = &p->info.id.daddr;
1118
1119 x = NULL;
6f26b61e
JHS		 1120
1121 mark = xfrm_mark_get(attrs, &m);
1da177e4 1122 if (p->info.seq) {
6f26b61e 1123 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1124 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1125 xfrm_state_put(x);
1126 x = NULL;
1127 }
1128 }
1129
1130 if (!x)
6f26b61e 1131 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1132 p->info.id.proto, daddr,
1133 &p->info.saddr, 1,
1134 family);
1135 err = -ENOENT;
1136 if (x == NULL)
1137 goto out_noput;
1138
658b219e
HX		 1139 err = xfrm_alloc_spi(x, p->min, p->max);
1140 if (err)
1141 goto out;
1da177e4 1142
658b219e 1143 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1144 if (IS_ERR(resp_skb)) {
1145 err = PTR_ERR(resp_skb);
1146 goto out;
1147 }
1148
15e47304 1149 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1150
1151out:
1152 xfrm_state_put(x);
1153out_noput:
1154 return err;
1155}
1156
b798a9ed 1157static int verify_policy_dir(u8 dir)
1da177e4
LT		 1158{
1159 switch (dir) {
1160 case XFRM_POLICY_IN:
1161 case XFRM_POLICY_OUT:
1162 case XFRM_POLICY_FWD:
1163 break;
1164
1165 default:
1166 return -EINVAL;
3ff50b79 1167 }
1da177e4
LT		 1168
1169 return 0;
1170}
1171
b798a9ed 1172static int verify_policy_type(u8 type)
f7b6983f
MN		 1173{
1174 switch (type) {
1175 case XFRM_POLICY_TYPE_MAIN:
1176#ifdef CONFIG_XFRM_SUB_POLICY
1177 case XFRM_POLICY_TYPE_SUB:
1178#endif
1179 break;
1180
1181 default:
1182 return -EINVAL;
3ff50b79 1183 }
f7b6983f
MN		 1184
1185 return 0;
1186}
1187
1da177e4
LT		 1188static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1189{
e682adf0
FD		 1190 int ret;
1191
1da177e4
LT		 1192 switch (p->share) {
1193 case XFRM_SHARE_ANY:
1194 case XFRM_SHARE_SESSION:
1195 case XFRM_SHARE_USER:
1196 case XFRM_SHARE_UNIQUE:
1197 break;
1198
1199 default:
1200 return -EINVAL;
3ff50b79 1201 }
1da177e4
LT		 1202
1203 switch (p->action) {
1204 case XFRM_POLICY_ALLOW:
1205 case XFRM_POLICY_BLOCK:
1206 break;
1207
1208 default:
1209 return -EINVAL;
3ff50b79 1210 }
1da177e4
LT		 1211
1212 switch (p->sel.family) {
1213 case AF_INET:
1214 break;
1215
1216 case AF_INET6:
dfd56b8b 1217#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1218 break;
1219#else
1220 return -EAFNOSUPPORT;
1221#endif
1222
1223 default:
1224 return -EINVAL;
3ff50b79 1225 }
1da177e4 1226
e682adf0
FD		 1227 ret = verify_policy_dir(p->dir);
1228 if (ret)
1229 return ret;
1230 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1231 return -EINVAL;
1232
1233 return 0;
1da177e4
LT		 1234}
1235
5424f32e 1236static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1237{
5424f32e 1238 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1239 struct xfrm_user_sec_ctx *uctx;
1240
1241 if (!rt)
1242 return 0;
1243
5424f32e 1244 uctx = nla_data(rt);
52a4c640 1245 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1246}
1247
1da177e4
LT		 1248static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1249 int nr)
1250{
1251 int i;
1252
1253 xp->xfrm_nr = nr;
1254 for (i = 0; i < nr; i++, ut++) {
1255 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1256
1257 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1258 memcpy(&t->saddr, &ut->saddr,
1259 sizeof(xfrm_address_t));
1260 t->reqid = ut->reqid;
1261 t->mode = ut->mode;
1262 t->share = ut->share;
1263 t->optional = ut->optional;
1264 t->aalgos = ut->aalgos;
1265 t->ealgos = ut->ealgos;
1266 t->calgos = ut->calgos;
c5d18e98
HX		 1267 /* If all masks are ~0, then we allow all algorithms. */
1268 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1269 t->encap_family = ut->family;
1da177e4
LT		 1270 }
1271}
1272
b4ad86bf
DM		 1273static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1274{
1275 int i;
1276
1277 if (nr > XFRM_MAX_DEPTH)
1278 return -EINVAL;
1279
1280 for (i = 0; i < nr; i++) {
1281 /* We never validated the ut->family value, so many
1282 * applications simply leave it at zero. The check was
1283 * never made and ut->family was ignored because all
1284 * templates could be assumed to have the same family as
1285 * the policy itself. Now that we will have ipv4-in-ipv6
1286 * and ipv6-in-ipv4 tunnels, this is no longer true.
1287 */
1288 if (!ut[i].family)
1289 ut[i].family = family;
1290
1291 switch (ut[i].family) {
1292 case AF_INET:
1293 break;
dfd56b8b 1294#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1295 case AF_INET6:
1296 break;
1297#endif
1298 default:
1299 return -EINVAL;
3ff50b79 1300 }
b4ad86bf
DM		 1301 }
1302
1303 return 0;
1304}
1305
5424f32e 1306static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1307{
5424f32e 1308 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1309
1310 if (!rt) {
1311 pol->xfrm_nr = 0;
1312 } else {
5424f32e
TG		 1313 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1314 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1315 int err;
1da177e4 1316
b4ad86bf
DM		 1317 err = validate_tmpl(nr, utmpl, pol->family);
1318 if (err)
1319 return err;
1da177e4 1320
5424f32e 1321 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1322 }
1323 return 0;
1324}
1325
5424f32e 1326static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1327{
5424f32e 1328 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1329 struct xfrm_userpolicy_type *upt;
b798a9ed 1330 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1331 int err;
1332
1333 if (rt) {
5424f32e 1334 upt = nla_data(rt);
f7b6983f
MN		 1335 type = upt->type;
1336 }
1337
1338 err = verify_policy_type(type);
1339 if (err)
1340 return err;
1341
1342 *tp = type;
1343 return 0;
1344}
1345
1da177e4
LT		 1346static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1347{
1348 xp->priority = p->priority;
1349 xp->index = p->index;
1350 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1351 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1352 xp->action = p->action;
1353 xp->flags = p->flags;
1354 xp->family = p->sel.family;
1355 /* XXX xp->share = p->share; */
1356}
1357
1358static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1359{
7b789836 1360 memset(p, 0, sizeof(*p));
1da177e4
LT		 1361 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1362 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1363 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1364 p->priority = xp->priority;
1365 p->index = xp->index;
1366 p->sel.family = xp->family;
1367 p->dir = dir;
1368 p->action = xp->action;
1369 p->flags = xp->flags;
1370 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1371}
1372
fc34acd3 1373static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1374{
fc34acd3 1375 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1376 int err;
1377
1378 if (!xp) {
1379 *errp = -ENOMEM;
1380 return NULL;
1381 }
1382
1383 copy_from_user_policy(xp, p);
df71837d 1384
35a7aa08 1385 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1386 if (err)
1387 goto error;
1388
35a7aa08
TG		 1389 if (!(err = copy_from_user_tmpl(xp, attrs)))
1390 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1391 if (err)
1392 goto error;
1da177e4 1393
295fae56
JHS		 1394 xfrm_mark_get(attrs, &xp->mark);
1395
1da177e4 1396 return xp;
f7b6983f
MN		 1397 error:
1398 *errp = err;
12a169e7 1399 xp->walk.dead = 1;
64c31b3f 1400 xfrm_policy_destroy(xp);
f7b6983f 1401 return NULL;
1da177e4
LT		 1402}
1403
22e70050 1404static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1405 struct nlattr **attrs)
1da177e4 1406{
fc34acd3 1407 struct net *net = sock_net(skb->sk);
7b67c857 1408 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1409 struct xfrm_policy *xp;
26b15dad 1410 struct km_event c;
1da177e4
LT		 1411 int err;
1412 int excl;
e1760bd5 1413 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1414 unsigned int sessionid = audit_get_sessionid(current);
1da177e4
LT		 1415
1416 err = verify_newpolicy_info(p);
df71837d
TJ		 1417 if (err)
1418 return err;
35a7aa08 1419 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1420 if (err)
1421 return err;
1422
fc34acd3 1423 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1424 if (!xp)
1425 return err;
1426
25985edc 1427 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1428 * Aha! this is anti-netlink really i.e more pfkey derived
1429 * in netlink excl is a flag and you wouldnt need
1430 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1431 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1432 err = xfrm_policy_insert(p->dir, xp, excl);
f1370cc4 1433 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid);
161a09e7 1434
1da177e4 1435 if (err) {
03e1ad7b 1436 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1437 kfree(xp);
1438 return err;
1439 }
1440
f60f6b8f 1441 c.event = nlh->nlmsg_type;
26b15dad 1442 c.seq = nlh->nlmsg_seq;
15e47304 1443 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1444 km_policy_notify(xp, p->dir, &c);
1445
1da177e4
LT		 1446 xfrm_pol_put(xp);
1447
1448 return 0;
1449}
1450
1451static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1452{
1453 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1454 int i;
1455
1456 if (xp->xfrm_nr == 0)
1457 return 0;
1458
1459 for (i = 0; i < xp->xfrm_nr; i++) {
1460 struct xfrm_user_tmpl *up = &vec[i];
1461 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1462
1f86840f 1463 memset(up, 0, sizeof(*up));
1da177e4 1464 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1465 up->family = kp->encap_family;
1da177e4
LT		 1466 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1467 up->reqid = kp->reqid;
1468 up->mode = kp->mode;
1469 up->share = kp->share;
1470 up->optional = kp->optional;
1471 up->aalgos = kp->aalgos;
1472 up->ealgos = kp->ealgos;
1473 up->calgos = kp->calgos;
1474 }
df71837d 1475
c0144bea
TG		 1476 return nla_put(skb, XFRMA_TMPL,
1477 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1478}
1479
1480static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1481{
1482 if (x->security) {
1483 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1484 }
1485 return 0;
0d681623 1486}
df71837d 1487
0d681623
SH		 1488static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1489{
1d1e34dd 1490 if (xp->security)
0d681623 1491 return copy_sec_ctx(xp->security, skb);
0d681623 1492 return 0;
df71837d 1493}
cfbfd45a
TG		 1494static inline size_t userpolicy_type_attrsize(void)
1495{
1496#ifdef CONFIG_XFRM_SUB_POLICY
1497 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1498#else
1499 return 0;
1500#endif
1501}
df71837d 1502
f7b6983f 1503#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1504static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1505{
c0144bea
TG		 1506 struct xfrm_userpolicy_type upt = {
1507 .type = type,
1508 };
f7b6983f 1509
c0144bea 1510 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1511}
1512
1513#else
b798a9ed 1514static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1515{
1516 return 0;
1517}
1518#endif
1519
1da177e4
LT		 1520static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1521{
1522 struct xfrm_dump_info *sp = ptr;
1523 struct xfrm_userpolicy_info *p;
1524 struct sk_buff *in_skb = sp->in_skb;
1525 struct sk_buff *skb = sp->out_skb;
1526 struct nlmsghdr *nlh;
1d1e34dd 1527 int err;
1da177e4 1528
15e47304 1529 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1530 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1531 if (nlh == NULL)
1532 return -EMSGSIZE;
1da177e4 1533
7b67c857 1534 p = nlmsg_data(nlh);
1da177e4 1535 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1536 err = copy_to_user_tmpl(xp, skb);
1537 if (!err)
1538 err = copy_to_user_sec_ctx(xp, skb);
1539 if (!err)
1540 err = copy_to_user_policy_type(xp->type, skb);
1541 if (!err)
1542 err = xfrm_mark_put(skb, &xp->mark);
1543 if (err) {
1544 nlmsg_cancel(skb, nlh);
1545 return err;
1546 }
9825069d 1547 nlmsg_end(skb, nlh);
1da177e4 1548 return 0;
1da177e4
LT		 1549}
1550
4c563f76
TT		 1551static int xfrm_dump_policy_done(struct netlink_callback *cb)
1552{
1553 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
283bc9f3 1554 struct net *net = sock_net(cb->skb->sk);
4c563f76 1555
283bc9f3 1556 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1557 return 0;
1558}
1559
1da177e4
LT		 1560static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1561{
fc34acd3 1562 struct net *net = sock_net(skb->sk);
4c563f76 1563 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1564 struct xfrm_dump_info info;
1565
4c563f76
TT		 1566 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1567 sizeof(cb->args) - sizeof(cb->args[0]));
1568
1da177e4
LT		 1569 info.in_skb = cb->skb;
1570 info.out_skb = skb;
1571 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1572 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1573
1574 if (!cb->args[0]) {
1575 cb->args[0] = 1;
1576 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1577 }
1578
fc34acd3 1579 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1580
1581 return skb->len;
1582}
1583
1584static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1585 struct xfrm_policy *xp,
1586 int dir, u32 seq)
1587{
1588 struct xfrm_dump_info info;
1589 struct sk_buff *skb;
c2546372 1590 int err;
1da177e4 1591
7deb2264 1592 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1593 if (!skb)
1594 return ERR_PTR(-ENOMEM);
1595
1da177e4
LT		 1596 info.in_skb = in_skb;
1597 info.out_skb = skb;
1598 info.nlmsg_seq = seq;
1599 info.nlmsg_flags = 0;
1da177e4 1600
c2546372
MK		 1601 err = dump_one_policy(xp, dir, 0, &info);
1602 if (err) {
1da177e4 1603 kfree_skb(skb);
c2546372 1604 return ERR_PTR(err);
1da177e4
LT		 1605 }
1606
1607 return skb;
1608}
1609
22e70050 1610static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1611 struct nlattr **attrs)
1da177e4 1612{
fc34acd3 1613 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1614 struct xfrm_policy *xp;
1615 struct xfrm_userpolicy_id *p;
b798a9ed 1616 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1617 int err;
26b15dad 1618 struct km_event c;
1da177e4 1619 int delete;
295fae56
JHS		 1620 struct xfrm_mark m;
1621 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1622
7b67c857 1623 p = nlmsg_data(nlh);
1da177e4
LT		 1624 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1625
35a7aa08 1626 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1627 if (err)
1628 return err;
1629
1da177e4
LT		 1630 err = verify_policy_dir(p->dir);
1631 if (err)
1632 return err;
1633
1634 if (p->index)
295fae56 1635 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1636 else {
5424f32e 1637 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1638 struct xfrm_sec_ctx *ctx;
df71837d 1639
35a7aa08 1640 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1641 if (err)
1642 return err;
1643
2c8dd116 1644 ctx = NULL;
df71837d 1645 if (rt) {
5424f32e 1646 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1647
52a4c640 1648 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1649 if (err)
df71837d 1650 return err;
2c8dd116 1651 }
295fae56 1652 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1653 ctx, delete, &err);
03e1ad7b 1654 security_xfrm_policy_free(ctx);
df71837d 1655 }
1da177e4
LT		 1656 if (xp == NULL)
1657 return -ENOENT;
1658
1659 if (!delete) {
1660 struct sk_buff *resp_skb;
1661
1662 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1663 if (IS_ERR(resp_skb)) {
1664 err = PTR_ERR(resp_skb);
1665 } else {
a6483b79 1666 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1667 NETLINK_CB(skb).portid);
1da177e4 1668 }
26b15dad 1669 } else {
e1760bd5 1670 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1671 unsigned int sessionid = audit_get_sessionid(current);
2532386f 1672
f1370cc4 1673 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid);
13fcfbb0
DM		 1674
1675 if (err != 0)
c8c05a8e 1676 goto out;
13fcfbb0 1677
e7443892 1678 c.data.byid = p->index;
f60f6b8f 1679 c.event = nlh->nlmsg_type;
26b15dad 1680 c.seq = nlh->nlmsg_seq;
15e47304 1681 c.portid = nlh->nlmsg_pid;
26b15dad 1682 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1683 }
1684
c8c05a8e 1685out:
ef41aaa0 1686 xfrm_pol_put(xp);
e4c17216
PM		 1687 if (delete && err == 0)
1688 xfrm_garbage_collect(net);
1da177e4
LT		 1689 return err;
1690}
1691
22e70050 1692static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1693 struct nlattr **attrs)
1da177e4 1694{
fc34acd3 1695 struct net *net = sock_net(skb->sk);
26b15dad 1696 struct km_event c;
7b67c857 1697 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1698 struct xfrm_audit audit_info;
4aa2e62c 1699 int err;
1da177e4 1700
c53fa1ed
PM		 1701 audit_info.loginuid = audit_get_loginuid(current);
1702 audit_info.sessionid = audit_get_sessionid(current);
fc34acd3 1703 err = xfrm_state_flush(net, p->proto, &audit_info);
9e64cc95
JHS		 1704 if (err) {
1705 if (err == -ESRCH) /* empty table */
1706 return 0;
069c474e 1707 return err;
9e64cc95 1708 }
bf08867f 1709 c.data.proto = p->proto;
f60f6b8f 1710 c.event = nlh->nlmsg_type;
26b15dad 1711 c.seq = nlh->nlmsg_seq;
15e47304 1712 c.portid = nlh->nlmsg_pid;
7067802e 1713 c.net = net;
26b15dad
JHS		 1714 km_state_notify(NULL, &c);
1715
1da177e4
LT		 1716 return 0;
1717}
1718
d8647b79 1719static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1720{
d8647b79
SK		 1721 size_t replay_size = x->replay_esn ?
1722 xfrm_replay_state_esn_len(x->replay_esn) :
1723 sizeof(struct xfrm_replay_state);
1724
7deb2264 1725 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1726 + nla_total_size(replay_size)
7deb2264 1727 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1728 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1729 + nla_total_size(4) /* XFRM_AE_RTHR */
1730 + nla_total_size(4); /* XFRM_AE_ETHR */
1731}
d51d081d 1732
214e005b 1733static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1734{
1735 struct xfrm_aevent_id *id;
1736 struct nlmsghdr *nlh;
1d1e34dd 1737 int err;
d51d081d 1738
15e47304 1739 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1740 if (nlh == NULL)
1741 return -EMSGSIZE;
d51d081d 1742
7b67c857 1743 id = nlmsg_data(nlh);
9b7a787d 1744 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1745 id->sa_id.spi = x->id.spi;
1746 id->sa_id.family = x->props.family;
1747 id->sa_id.proto = x->id.proto;
9b7a787d 1748 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1749 id->reqid = x->props.reqid;
d51d081d
JHS		 1750 id->flags = c->data.aevent;
1751
d0fde795 1752 if (x->replay_esn) {
1d1e34dd
DM		 1753 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1754 xfrm_replay_state_esn_len(x->replay_esn),
1755 x->replay_esn);
d0fde795 1756 } else {
1d1e34dd
DM		 1757 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1758 &x->replay);
d0fde795 1759 }
1d1e34dd
DM		 1760 if (err)
1761 goto out_cancel;
1762 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1763 if (err)
1764 goto out_cancel;
d51d081d 1765
1d1e34dd
DM		 1766 if (id->flags & XFRM_AE_RTHR) {
1767 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1768 if (err)
1769 goto out_cancel;
1770 }
1771 if (id->flags & XFRM_AE_ETHR) {
1772 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1773 x->replay_maxage * 10 / HZ);
1774 if (err)
1775 goto out_cancel;
1776 }
1777 err = xfrm_mark_put(skb, &x->mark);
1778 if (err)
1779 goto out_cancel;
6f26b61e 1780
9825069d 1781 return nlmsg_end(skb, nlh);
d51d081d 1782
1d1e34dd 1783out_cancel:
9825069d 1784 nlmsg_cancel(skb, nlh);
1d1e34dd 1785 return err;
d51d081d
JHS		 1786}
1787
22e70050 1788static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1789 struct nlattr **attrs)
d51d081d 1790{
fc34acd3 1791 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1792 struct xfrm_state *x;
1793 struct sk_buff *r_skb;
1794 int err;
1795 struct km_event c;
6f26b61e
JHS		 1796 u32 mark;
1797 struct xfrm_mark m;
7b67c857 1798 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1799 struct xfrm_usersa_id *id = &p->sa_id;
1800
6f26b61e
JHS		 1801 mark = xfrm_mark_get(attrs, &m);
1802
1803 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1804 if (x == NULL)
d51d081d 1805 return -ESRCH;
d8647b79
SK		 1806
1807 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1808 if (r_skb == NULL) {
1809 xfrm_state_put(x);
1810 return -ENOMEM;
d51d081d
JHS		 1811 }
1812
1813 /*
1814 * XXX: is this lock really needed - none of the other
1815 * gets lock (the concern is things getting updated
1816 * while we are still reading) - jhs
1817 */
1818 spin_lock_bh(&x->lock);
1819 c.data.aevent = p->flags;
1820 c.seq = nlh->nlmsg_seq;
15e47304 1821 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1822
1823 if (build_aevent(r_skb, x, &c) < 0)
1824 BUG();
15e47304 1825 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1826 spin_unlock_bh(&x->lock);
1827 xfrm_state_put(x);
1828 return err;
1829}
1830
22e70050 1831static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1832 struct nlattr **attrs)
d51d081d 1833{
fc34acd3 1834 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1835 struct xfrm_state *x;
1836 struct km_event c;
02d0892f 1837 int err = -EINVAL;
6f26b61e
JHS		 1838 u32 mark = 0;
1839 struct xfrm_mark m;
7b67c857 1840 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1841 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1842 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1843 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d 1844
d8647b79 1845 if (!lt && !rp && !re)
d51d081d
JHS		 1846 return err;
1847
1848 /* pedantic mode - thou shalt sayeth replaceth */
1849 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1850 return err;
1851
6f26b61e
JHS		 1852 mark = xfrm_mark_get(attrs, &m);
1853
1854 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1855 if (x == NULL)
1856 return -ESRCH;
1857
1858 if (x->km.state != XFRM_STATE_VALID)
1859 goto out;
1860
4479ff76 1861 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 1862 if (err)
1863 goto out;
1864
d51d081d 1865 spin_lock_bh(&x->lock);
e3ac104d 1866 xfrm_update_ae_params(x, attrs, 1);
d51d081d 1867 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1868
1869 c.event = nlh->nlmsg_type;
1870 c.seq = nlh->nlmsg_seq;
15e47304 1871 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1872 c.data.aevent = XFRM_AE_CU;
1873 km_state_notify(x, &c);
1874 err = 0;
1875out:
1876 xfrm_state_put(x);
1877 return err;
1878}
1879
22e70050 1880static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1881 struct nlattr **attrs)
1da177e4 1882{
fc34acd3 1883 struct net *net = sock_net(skb->sk);
f7b6983f 1884 struct km_event c;
b798a9ed 1885 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1886 int err;
161a09e7 1887 struct xfrm_audit audit_info;
f7b6983f 1888
35a7aa08 1889 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1890 if (err)
1891 return err;
26b15dad 1892
c53fa1ed
PM		 1893 audit_info.loginuid = audit_get_loginuid(current);
1894 audit_info.sessionid = audit_get_sessionid(current);
fc34acd3 1895 err = xfrm_policy_flush(net, type, &audit_info);
2f1eb65f
JHS		 1896 if (err) {
1897 if (err == -ESRCH) /* empty table */
1898 return 0;
069c474e 1899 return err;
2f1eb65f
JHS		 1900 }
1901
f7b6983f 1902 c.data.type = type;
f60f6b8f 1903 c.event = nlh->nlmsg_type;
26b15dad 1904 c.seq = nlh->nlmsg_seq;
15e47304 1905 c.portid = nlh->nlmsg_pid;
7067802e 1906 c.net = net;
26b15dad 1907 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1908 return 0;
1909}
1910
22e70050 1911static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1912 struct nlattr **attrs)
6c5c8ca7 1913{
fc34acd3 1914 struct net *net = sock_net(skb->sk);
6c5c8ca7 1915 struct xfrm_policy *xp;
7b67c857 1916 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1917 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1918 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 1919 int err = -ENOENT;
295fae56
JHS		 1920 struct xfrm_mark m;
1921 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 1922
35a7aa08 1923 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1924 if (err)
1925 return err;
1926
c8bf4d04
TT		 1927 err = verify_policy_dir(p->dir);
1928 if (err)
1929 return err;
1930
6c5c8ca7 1931 if (p->index)
295fae56 1932 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 1933 else {
5424f32e 1934 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1935 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1936
35a7aa08 1937 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1938 if (err)
1939 return err;
1940
2c8dd116 1941 ctx = NULL;
6c5c8ca7 1942 if (rt) {
5424f32e 1943 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1944
52a4c640 1945 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1946 if (err)
6c5c8ca7 1947 return err;
2c8dd116 1948 }
295fae56 1949 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 1950 &p->sel, ctx, 0, &err);
03e1ad7b 1951 security_xfrm_policy_free(ctx);
6c5c8ca7 1952 }
6c5c8ca7 1953 if (xp == NULL)
ef41aaa0 1954 return -ENOENT;
03e1ad7b 1955
ea2dea9d 1956 if (unlikely(xp->walk.dead))
6c5c8ca7 1957 goto out;
6c5c8ca7 1958
6c5c8ca7
JHS		 1959 err = 0;
1960 if (up->hard) {
e1760bd5 1961 kuid_t loginuid = audit_get_loginuid(current);
4440e854 1962 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed 1963
6c5c8ca7 1964 xfrm_policy_delete(xp, p->dir);
f1370cc4 1965 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid);
161a09e7 1966
6c5c8ca7
JHS		 1967 } else {
1968 // reset the timers here?
62db5cfd 1969 WARN(1, "Dont know what to do with soft policy expire\n");
6c5c8ca7 1970 }
c6bb8136 1971 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 1972
1973out:
1974 xfrm_pol_put(xp);
1975 return err;
1976}
1977
22e70050 1978static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1979 struct nlattr **attrs)
53bc6b4d 1980{
fc34acd3 1981 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 1982 struct xfrm_state *x;
1983 int err;
7b67c857 1984 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 1985 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 1986 struct xfrm_mark m;
928497f0 1987 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 1988
6f26b61e 1989 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1990
3a765aa5 1991 err = -ENOENT;
53bc6b4d
JHS		 1992 if (x == NULL)
1993 return err;
1994
53bc6b4d 1995 spin_lock_bh(&x->lock);
3a765aa5 1996 err = -EINVAL;
53bc6b4d
JHS		 1997 if (x->km.state != XFRM_STATE_VALID)
1998 goto out;
c6bb8136 1999 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 2000
161a09e7 2001 if (ue->hard) {
e1760bd5 2002 kuid_t loginuid = audit_get_loginuid(current);
4440e854 2003 unsigned int sessionid = audit_get_sessionid(current);
c53fa1ed 2004
53bc6b4d 2005 __xfrm_state_delete(x);
f1370cc4 2006 xfrm_audit_state_delete(x, 1, loginuid, sessionid);
161a09e7 2007 }
3a765aa5 2008 err = 0;
53bc6b4d
JHS		 2009out:
2010 spin_unlock_bh(&x->lock);
2011 xfrm_state_put(x);
2012 return err;
2013}
2014
22e70050 2015static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2016 struct nlattr **attrs)
980ebd25 2017{
fc34acd3 2018 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2019 struct xfrm_policy *xp;
2020 struct xfrm_user_tmpl *ut;
2021 int i;
5424f32e 2022 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2023 struct xfrm_mark mark;
980ebd25 2024
7b67c857 2025 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2026 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2027 int err = -ENOMEM;
2028
2029 if (!x)
d8eb9307 2030 goto nomem;
980ebd25 2031
6f26b61e
JHS		 2032 xfrm_mark_get(attrs, &mark);
2033
980ebd25 2034 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 2035 if (err)
2036 goto bad_policy;
980ebd25
JHS		 2037
2038 /* build an XP */
fc34acd3 2039 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2040 if (!xp)
2041 goto free_state;
980ebd25
JHS		 2042
2043 memcpy(&x->id, &ua->id, sizeof(ua->id));
2044 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2045 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2046 xp->mark.m = x->mark.m = mark.m;
2047 xp->mark.v = x->mark.v = mark.v;
5424f32e 2048 ut = nla_data(rt);
980ebd25
JHS		 2049 /* extract the templates and for each call km_key */
2050 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2051 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2052 memcpy(&x->id, &t->id, sizeof(x->id));
2053 x->props.mode = t->mode;
2054 x->props.reqid = t->reqid;
2055 x->props.family = ut->family;
2056 t->aalgos = ua->aalgos;
2057 t->ealgos = ua->ealgos;
2058 t->calgos = ua->calgos;
2059 err = km_query(x, t, xp);
2060
2061 }
2062
2063 kfree(x);
2064 kfree(xp);
2065
2066 return 0;
d8eb9307
IJ		 2067
2068bad_policy:
62db5cfd 2069 WARN(1, "BAD policy passed\n");
d8eb9307
IJ		 2070free_state:
2071 kfree(x);
2072nomem:
2073 return err;
980ebd25
JHS		 2074}
2075
5c79de6e 2076#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2077static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2078 struct xfrm_kmaddress *k,
5424f32e 2079 struct nlattr **attrs, int *num)
5c79de6e 2080{
5424f32e 2081 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2082 struct xfrm_user_migrate *um;
2083 int i, num_migrate;
2084
13c1d189
AE		 2085 if (k != NULL) {
2086 struct xfrm_user_kmaddress *uk;
2087
2088 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2089 memcpy(&k->local, &uk->local, sizeof(k->local));
2090 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2091 k->family = uk->family;
2092 k->reserved = uk->reserved;
2093 }
2094
5424f32e
TG		 2095 um = nla_data(rt);
2096 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2097
2098 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2099 return -EINVAL;
2100
2101 for (i = 0; i < num_migrate; i++, um++, ma++) {
2102 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2103 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2104 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2105 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2106
2107 ma->proto = um->proto;
2108 ma->mode = um->mode;
2109 ma->reqid = um->reqid;
2110
2111 ma->old_family = um->old_family;
2112 ma->new_family = um->new_family;
2113 }
2114
2115 *num = i;
2116 return 0;
2117}
2118
2119static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2120 struct nlattr **attrs)
5c79de6e 2121{
7b67c857 2122 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2123 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2124 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2125 u8 type;
2126 int err;
2127 int n = 0;
8d549c4f 2128 struct net *net = sock_net(skb->sk);
5c79de6e 2129
35a7aa08 2130 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2131 return -EINVAL;
5c79de6e 2132
13c1d189
AE		 2133 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2134
5424f32e 2135 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2136 if (err)
2137 return err;
2138
13c1d189 2139 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2140 if (err)
2141 return err;
2142
2143 if (!n)
2144 return 0;
2145
8d549c4f 2146 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
5c79de6e
SS		 2147
2148 return 0;
2149}
2150#else
2151static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2152 struct nlattr **attrs)
5c79de6e
SS		 2153{
2154 return -ENOPROTOOPT;
2155}
2156#endif
2157
2158#ifdef CONFIG_XFRM_MIGRATE
183cad12 2159static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2160{
2161 struct xfrm_user_migrate um;
2162
2163 memset(&um, 0, sizeof(um));
2164 um.proto = m->proto;
2165 um.mode = m->mode;
2166 um.reqid = m->reqid;
2167 um.old_family = m->old_family;
2168 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2169 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2170 um.new_family = m->new_family;
2171 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2172 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2173
c0144bea 2174 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2175}
2176
183cad12 2177static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2178{
2179 struct xfrm_user_kmaddress uk;
2180
2181 memset(&uk, 0, sizeof(uk));
2182 uk.family = k->family;
2183 uk.reserved = k->reserved;
2184 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2185 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2186
2187 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2188}
2189
2190static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 2191{
2192 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 2193 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2194 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2195 + userpolicy_type_attrsize();
7deb2264
TG		 2196}
2197
183cad12
DM		 2198static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2199 int num_migrate, const struct xfrm_kmaddress *k,
2200 const struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e 2201{
183cad12 2202 const struct xfrm_migrate *mp;
5c79de6e
SS		 2203 struct xfrm_userpolicy_id *pol_id;
2204 struct nlmsghdr *nlh;
1d1e34dd 2205 int i, err;
5c79de6e 2206
79b8b7f4
TG		 2207 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2208 if (nlh == NULL)
2209 return -EMSGSIZE;
5c79de6e 2210
7b67c857 2211 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2212 /* copy data from selector, dir, and type to the pol_id */
2213 memset(pol_id, 0, sizeof(*pol_id));
2214 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2215 pol_id->dir = dir;
2216
1d1e34dd
DM		 2217 if (k != NULL) {
2218 err = copy_to_user_kmaddress(k, skb);
2219 if (err)
2220 goto out_cancel;
2221 }
2222 err = copy_to_user_policy_type(type, skb);
2223 if (err)
2224 goto out_cancel;
5c79de6e 2225 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2226 err = copy_to_user_migrate(mp, skb);
2227 if (err)
2228 goto out_cancel;
5c79de6e
SS		 2229 }
2230
9825069d 2231 return nlmsg_end(skb, nlh);
1d1e34dd
DM		 2232
2233out_cancel:
9825069d 2234 nlmsg_cancel(skb, nlh);
1d1e34dd 2235 return err;
5c79de6e
SS		 2236}
2237
183cad12
DM		 2238static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2239 const struct xfrm_migrate *m, int num_migrate,
2240 const struct xfrm_kmaddress *k)
5c79de6e 2241{
a6483b79 2242 struct net *net = &init_net;
5c79de6e 2243 struct sk_buff *skb;
5c79de6e 2244
13c1d189 2245 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2246 if (skb == NULL)
2247 return -ENOMEM;
2248
2249 /* build migrate */
13c1d189 2250 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2251 BUG();
2252
a6483b79 2253 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 2254}
2255#else
183cad12
DM		 2256static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2257 const struct xfrm_migrate *m, int num_migrate,
2258 const struct xfrm_kmaddress *k)
5c79de6e
SS		 2259{
2260 return -ENOPROTOOPT;
2261}
2262#endif
d51d081d 2263
a7bd9a45 2264#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2265
2266static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2267 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2268 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2269 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2270 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2271 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2272 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2273 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2274 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2275 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2276 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2277 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2278 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2279 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2280 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2281 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2282 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2283 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2284 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 2285 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2286 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2287};
2288
492b558b
TG		 2289#undef XMSGSIZE
2290
cf5cb79f 2291static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2292 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2293 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2294 [XFRMA_LASTUSED] = { .type = NLA_U64},
2295 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2296 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2297 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2298 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2299 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2300 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2301 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2302 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2303 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2304 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2305 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2306 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2307 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2308 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2309 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2310 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2311 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2312 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2313 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2314 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2315 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
d3623099 2316 [XFRMA_PROTO] = { .type = NLA_U8 },
870a2df4 2317 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
cf5cb79f
TG		 2318};
2319
05600a79 2320static const struct xfrm_link {
5424f32e 2321 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2322 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2323 int (*done)(struct netlink_callback *);
492b558b
TG		 2324} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2325 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2326 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2327 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2328 .dump = xfrm_dump_sa,
2329 .done = xfrm_dump_sa_done },
492b558b
TG		 2330 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2331 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2332 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2333 .dump = xfrm_dump_policy,
2334 .done = xfrm_dump_policy_done },
492b558b 2335 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2336 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2337 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2338 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2339 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2340 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2341 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2342 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2343 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2344 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2345 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2346 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 2347 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2348};
2349
1d00a4eb 2350static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2351{
a6483b79 2352 struct net *net = sock_net(skb->sk);
35a7aa08 2353 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2354 const struct xfrm_link *link;
a7bd9a45 2355 int type, err;
1da177e4 2356
1da177e4 2357 type = nlh->nlmsg_type;
1da177e4 2358 if (type > XFRM_MSG_MAX)
1d00a4eb 2359 return -EINVAL;
1da177e4
LT		 2360
2361 type -= XFRM_MSG_BASE;
2362 link = &xfrm_dispatch[type];
2363
2364 /* All operations require privileges, even GET */
df008c91 2365 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1d00a4eb 2366 return -EPERM;
1da177e4 2367
492b558b
TG		 2368 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2369 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2370 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2371 if (link->dump == NULL)
1d00a4eb 2372 return -EINVAL;
88fc2c84 2373
80d326fa
PNA		 2374 {
2375 struct netlink_dump_control c = {
2376 .dump = link->dump,
2377 .done = link->done,
2378 };
2379 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2380 }
1da177e4
LT		 2381 }
2382
35a7aa08 2383 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2384 xfrma_policy);
a7bd9a45
TG		 2385 if (err < 0)
2386 return err;
1da177e4
LT		 2387
2388 if (link->doit == NULL)
1d00a4eb 2389 return -EINVAL;
1da177e4 2390
5424f32e 2391 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2392}
2393
cd40b7d3 2394static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2395{
283bc9f3
FD		 2396 struct net *net = sock_net(skb->sk);
2397
2398 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2399 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2400 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2401}
2402
7deb2264
TG		 2403static inline size_t xfrm_expire_msgsize(void)
2404{
6f26b61e
JHS		 2405 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2406 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2407}
2408
214e005b 2409static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2410{
2411 struct xfrm_user_expire *ue;
2412 struct nlmsghdr *nlh;
1d1e34dd 2413 int err;
1da177e4 2414
15e47304 2415 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2416 if (nlh == NULL)
2417 return -EMSGSIZE;
1da177e4 2418
7b67c857 2419 ue = nlmsg_data(nlh);
1da177e4 2420 copy_to_user_state(x, &ue->state);
d51d081d 2421 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2422
1d1e34dd
DM		 2423 err = xfrm_mark_put(skb, &x->mark);
2424 if (err)
2425 return err;
6f26b61e 2426
9825069d 2427 return nlmsg_end(skb, nlh);
1da177e4
LT		 2428}
2429
214e005b 2430static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2431{
fc34acd3 2432 struct net *net = xs_net(x);
1da177e4
LT		 2433 struct sk_buff *skb;
2434
7deb2264 2435 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2436 if (skb == NULL)
2437 return -ENOMEM;
2438
6f26b61e
JHS		 2439 if (build_expire(skb, x, c) < 0) {
2440 kfree_skb(skb);
2441 return -EMSGSIZE;
2442 }
1da177e4 2443
a6483b79 2444 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2445}
2446
214e005b 2447static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2448{
fc34acd3 2449 struct net *net = xs_net(x);
d51d081d 2450 struct sk_buff *skb;
d51d081d 2451
d8647b79 2452 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2453 if (skb == NULL)
2454 return -ENOMEM;
2455
2456 if (build_aevent(skb, x, c) < 0)
2457 BUG();
2458
a6483b79 2459 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2460}
2461
214e005b 2462static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2463{
7067802e 2464 struct net *net = c->net;
26b15dad
JHS		 2465 struct xfrm_usersa_flush *p;
2466 struct nlmsghdr *nlh;
2467 struct sk_buff *skb;
7deb2264 2468 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2469
7deb2264 2470 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2471 if (skb == NULL)
2472 return -ENOMEM;
26b15dad 2473
15e47304 2474 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2475 if (nlh == NULL) {
2476 kfree_skb(skb);
2477 return -EMSGSIZE;
2478 }
26b15dad 2479
7b67c857 2480 p = nlmsg_data(nlh);
bf08867f 2481 p->proto = c->data.proto;
26b15dad 2482
9825069d 2483 nlmsg_end(skb, nlh);
26b15dad 2484
a6483b79 2485 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2486}
2487
7deb2264 2488static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2489{
7deb2264 2490 size_t l = 0;
1a6509d9
HX		 2491 if (x->aead)
2492 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2493 if (x->aalg) {
2494 l += nla_total_size(sizeof(struct xfrm_algo) +
2495 (x->aalg->alg_key_len + 7) / 8);
2496 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2497 }
26b15dad 2498 if (x->ealg)
0f99be0d 2499 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2500 if (x->calg)
7deb2264 2501 l += nla_total_size(sizeof(*x->calg));
26b15dad 2502 if (x->encap)
7deb2264 2503 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2504 if (x->tfcpad)
2505 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2506 if (x->replay_esn)
2507 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
68325d3b
HX		 2508 if (x->security)
2509 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2510 x->security->ctx_len);
2511 if (x->coaddr)
2512 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2513 if (x->props.extra_flags)
2514 l += nla_total_size(sizeof(x->props.extra_flags));
68325d3b 2515
d26f3984
HX		 2516 /* Must count x->lastused as it may become non-zero behind our back. */
2517 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2518
2519 return l;
2520}
2521
214e005b 2522static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2523{
fc34acd3 2524 struct net *net = xs_net(x);
26b15dad 2525 struct xfrm_usersa_info *p;
0603eac0 2526 struct xfrm_usersa_id *id;
26b15dad
JHS		 2527 struct nlmsghdr *nlh;
2528 struct sk_buff *skb;
26b15dad 2529 int len = xfrm_sa_len(x);
1d1e34dd 2530 int headlen, err;
0603eac0
HX		 2531
2532 headlen = sizeof(*p);
2533 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2534 len += nla_total_size(headlen);
0603eac0 2535 headlen = sizeof(*id);
6f26b61e 2536 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2537 }
7deb2264 2538 len += NLMSG_ALIGN(headlen);
26b15dad 2539
7deb2264 2540 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2541 if (skb == NULL)
2542 return -ENOMEM;
26b15dad 2543
15e47304 2544 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2545 err = -EMSGSIZE;
79b8b7f4 2546 if (nlh == NULL)
1d1e34dd 2547 goto out_free_skb;
26b15dad 2548
7b67c857 2549 p = nlmsg_data(nlh);
0603eac0 2550 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2551 struct nlattr *attr;
2552
7b67c857 2553 id = nlmsg_data(nlh);
0603eac0
HX		 2554 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2555 id->spi = x->id.spi;
2556 id->family = x->props.family;
2557 id->proto = x->id.proto;
2558
c0144bea 2559 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2560 err = -EMSGSIZE;
c0144bea 2561 if (attr == NULL)
1d1e34dd 2562 goto out_free_skb;
c0144bea
TG		 2563
2564 p = nla_data(attr);
0603eac0 2565 }
1d1e34dd
DM		 2566 err = copy_to_user_state_extra(x, p, skb);
2567 if (err)
2568 goto out_free_skb;
26b15dad 2569
9825069d 2570 nlmsg_end(skb, nlh);
26b15dad 2571
a6483b79 2572 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2573
1d1e34dd 2574out_free_skb:
26b15dad 2575 kfree_skb(skb);
1d1e34dd 2576 return err;
26b15dad
JHS		 2577}
2578
214e005b 2579static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2580{
2581
2582 switch (c->event) {
f60f6b8f 2583 case XFRM_MSG_EXPIRE:
26b15dad 2584 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2585 case XFRM_MSG_NEWAE:
2586 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2587 case XFRM_MSG_DELSA:
2588 case XFRM_MSG_UPDSA:
2589 case XFRM_MSG_NEWSA:
26b15dad 2590 return xfrm_notify_sa(x, c);
f60f6b8f 2591 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2592 return xfrm_notify_sa_flush(c);
2593 default:
62db5cfd 2594 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2595 c->event);
2596 break;
26b15dad
JHS		 2597 }
2598
2599 return 0;
2600
2601}
2602
7deb2264
TG		 2603static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2604 struct xfrm_policy *xp)
2605{
2606 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2607 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2608 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2609 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2610 + userpolicy_type_attrsize();
2611}
2612
1da177e4 2613static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2614 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2615{
1d1e34dd 2616 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2617 struct xfrm_user_acquire *ua;
2618 struct nlmsghdr *nlh;
1d1e34dd 2619 int err;
1da177e4 2620
79b8b7f4
TG		 2621 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2622 if (nlh == NULL)
2623 return -EMSGSIZE;
1da177e4 2624
7b67c857 2625 ua = nlmsg_data(nlh);
1da177e4
LT		 2626 memcpy(&ua->id, &x->id, sizeof(ua->id));
2627 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2628 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2629 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2630 ua->aalgos = xt->aalgos;
2631 ua->ealgos = xt->ealgos;
2632 ua->calgos = xt->calgos;
2633 ua->seq = x->km.seq = seq;
2634
1d1e34dd
DM		 2635 err = copy_to_user_tmpl(xp, skb);
2636 if (!err)
2637 err = copy_to_user_state_sec_ctx(x, skb);
2638 if (!err)
2639 err = copy_to_user_policy_type(xp->type, skb);
2640 if (!err)
2641 err = xfrm_mark_put(skb, &xp->mark);
2642 if (err) {
2643 nlmsg_cancel(skb, nlh);
2644 return err;
2645 }
1da177e4 2646
9825069d 2647 return nlmsg_end(skb, nlh);
1da177e4
LT		 2648}
2649
2650static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2651 struct xfrm_policy *xp)
1da177e4 2652{
a6483b79 2653 struct net *net = xs_net(x);
1da177e4 2654 struct sk_buff *skb;
1da177e4 2655
7deb2264 2656 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2657 if (skb == NULL)
2658 return -ENOMEM;
2659
65e0736b 2660 if (build_acquire(skb, x, xt, xp) < 0)
1da177e4
LT		 2661 BUG();
2662
a6483b79 2663 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2664}
2665
2666/* User gives us xfrm_user_policy_info followed by an array of 0
2667 * or more templates.
2668 */
cb969f07 2669static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2670 u8 *data, int len, int *dir)
2671{
fc34acd3 2672 struct net *net = sock_net(sk);
1da177e4
LT		 2673 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2674 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2675 struct xfrm_policy *xp;
2676 int nr;
2677
cb969f07 2678 switch (sk->sk_family) {
1da177e4
LT		 2679 case AF_INET:
2680 if (opt != IP_XFRM_POLICY) {
2681 *dir = -EOPNOTSUPP;
2682 return NULL;
2683 }
2684 break;
dfd56b8b 2685#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2686 case AF_INET6:
2687 if (opt != IPV6_XFRM_POLICY) {
2688 *dir = -EOPNOTSUPP;
2689 return NULL;
2690 }
2691 break;
2692#endif
2693 default:
2694 *dir = -EINVAL;
2695 return NULL;
2696 }
2697
2698 *dir = -EINVAL;
2699
2700 if (len < sizeof(*p) ||
2701 verify_newpolicy_info(p))
2702 return NULL;
2703
2704 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2705 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2706 return NULL;
2707
a4f1bac6
HX		 2708 if (p->dir > XFRM_POLICY_OUT)
2709 return NULL;
2710
2f09a4d5 2711 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2712 if (xp == NULL) {
2713 *dir = -ENOBUFS;
2714 return NULL;
2715 }
2716
2717 copy_from_user_policy(xp, p);
f7b6983f 2718 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2719 copy_templates(xp, ut, nr);
2720
2721 *dir = p->dir;
2722
2723 return xp;
2724}
2725
7deb2264
TG		 2726static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2727{
2728 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2729 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2730 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2731 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2732 + userpolicy_type_attrsize();
2733}
2734
1da177e4 2735static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2736 int dir, const struct km_event *c)
1da177e4
LT		 2737{
2738 struct xfrm_user_polexpire *upe;
d51d081d 2739 int hard = c->data.hard;
1d1e34dd
DM		 2740 struct nlmsghdr *nlh;
2741 int err;
1da177e4 2742
15e47304 2743 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2744 if (nlh == NULL)
2745 return -EMSGSIZE;
1da177e4 2746
7b67c857 2747 upe = nlmsg_data(nlh);
1da177e4 2748 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2749 err = copy_to_user_tmpl(xp, skb);
2750 if (!err)
2751 err = copy_to_user_sec_ctx(xp, skb);
2752 if (!err)
2753 err = copy_to_user_policy_type(xp->type, skb);
2754 if (!err)
2755 err = xfrm_mark_put(skb, &xp->mark);
2756 if (err) {
2757 nlmsg_cancel(skb, nlh);
2758 return err;
2759 }
1da177e4
LT		 2760 upe->hard = !!hard;
2761
9825069d 2762 return nlmsg_end(skb, nlh);
1da177e4
LT		 2763}
2764
214e005b 2765static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2766{
fc34acd3 2767 struct net *net = xp_net(xp);
1da177e4 2768 struct sk_buff *skb;
1da177e4 2769
7deb2264 2770 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2771 if (skb == NULL)
2772 return -ENOMEM;
2773
d51d081d 2774 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2775 BUG();
2776
a6483b79 2777 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2778}
2779
214e005b 2780static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2781{
1d1e34dd 2782 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 2783 struct net *net = xp_net(xp);
26b15dad 2784 struct xfrm_userpolicy_info *p;
0603eac0 2785 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2786 struct nlmsghdr *nlh;
2787 struct sk_buff *skb;
1d1e34dd 2788 int headlen, err;
0603eac0
HX		 2789
2790 headlen = sizeof(*p);
2791 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2792 len += nla_total_size(headlen);
0603eac0
HX		 2793 headlen = sizeof(*id);
2794 }
cfbfd45a 2795 len += userpolicy_type_attrsize();
295fae56 2796 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2797 len += NLMSG_ALIGN(headlen);
26b15dad 2798
7deb2264 2799 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2800 if (skb == NULL)
2801 return -ENOMEM;
26b15dad 2802
15e47304 2803 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2804 err = -EMSGSIZE;
79b8b7f4 2805 if (nlh == NULL)
1d1e34dd 2806 goto out_free_skb;
26b15dad 2807
7b67c857 2808 p = nlmsg_data(nlh);
0603eac0 2809 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2810 struct nlattr *attr;
2811
7b67c857 2812 id = nlmsg_data(nlh);
0603eac0
HX		 2813 memset(id, 0, sizeof(*id));
2814 id->dir = dir;
2815 if (c->data.byid)
2816 id->index = xp->index;
2817 else
2818 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2819
c0144bea 2820 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 2821 err = -EMSGSIZE;
c0144bea 2822 if (attr == NULL)
1d1e34dd 2823 goto out_free_skb;
c0144bea
TG		 2824
2825 p = nla_data(attr);
0603eac0 2826 }
26b15dad 2827
26b15dad 2828 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 2829 err = copy_to_user_tmpl(xp, skb);
2830 if (!err)
2831 err = copy_to_user_policy_type(xp->type, skb);
2832 if (!err)
2833 err = xfrm_mark_put(skb, &xp->mark);
2834 if (err)
2835 goto out_free_skb;
295fae56 2836
9825069d 2837 nlmsg_end(skb, nlh);
26b15dad 2838
a6483b79 2839 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2840
1d1e34dd 2841out_free_skb:
26b15dad 2842 kfree_skb(skb);
1d1e34dd 2843 return err;
26b15dad
JHS		 2844}
2845
214e005b 2846static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 2847{
7067802e 2848 struct net *net = c->net;
26b15dad
JHS		 2849 struct nlmsghdr *nlh;
2850 struct sk_buff *skb;
1d1e34dd 2851 int err;
26b15dad 2852
7deb2264 2853 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2854 if (skb == NULL)
2855 return -ENOMEM;
26b15dad 2856
15e47304 2857 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 2858 err = -EMSGSIZE;
79b8b7f4 2859 if (nlh == NULL)
1d1e34dd
DM		 2860 goto out_free_skb;
2861 err = copy_to_user_policy_type(c->data.type, skb);
2862 if (err)
2863 goto out_free_skb;
26b15dad 2864
9825069d 2865 nlmsg_end(skb, nlh);
26b15dad 2866
a6483b79 2867 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2868
1d1e34dd 2869out_free_skb:
26b15dad 2870 kfree_skb(skb);
1d1e34dd 2871 return err;
26b15dad
JHS		 2872}
2873
214e005b 2874static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2875{
2876
2877 switch (c->event) {
f60f6b8f
HX		 2878 case XFRM_MSG_NEWPOLICY:
2879 case XFRM_MSG_UPDPOLICY:
2880 case XFRM_MSG_DELPOLICY:
26b15dad 2881 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2882 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2883 return xfrm_notify_policy_flush(c);
f60f6b8f 2884 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2885 return xfrm_exp_policy_notify(xp, dir, c);
2886 default:
62db5cfd 2887 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2888 c->event);
26b15dad
JHS		 2889 }
2890
2891 return 0;
2892
2893}
2894
7deb2264
TG		 2895static inline size_t xfrm_report_msgsize(void)
2896{
2897 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2898}
2899
97a64b45
MN		 2900static int build_report(struct sk_buff *skb, u8 proto,
2901 struct xfrm_selector *sel, xfrm_address_t *addr)
2902{
2903 struct xfrm_user_report *ur;
2904 struct nlmsghdr *nlh;
97a64b45 2905
79b8b7f4
TG		 2906 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2907 if (nlh == NULL)
2908 return -EMSGSIZE;
97a64b45 2909
7b67c857 2910 ur = nlmsg_data(nlh);
97a64b45
MN		 2911 ur->proto = proto;
2912 memcpy(&ur->sel, sel, sizeof(ur->sel));
2913
1d1e34dd
DM		 2914 if (addr) {
2915 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2916 if (err) {
2917 nlmsg_cancel(skb, nlh);
2918 return err;
2919 }
2920 }
9825069d 2921 return nlmsg_end(skb, nlh);
97a64b45
MN		 2922}
2923
db983c11
AD		 2924static int xfrm_send_report(struct net *net, u8 proto,
2925 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2926{
2927 struct sk_buff *skb;
97a64b45 2928
7deb2264 2929 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2930 if (skb == NULL)
2931 return -ENOMEM;
2932
2933 if (build_report(skb, proto, sel, addr) < 0)
2934 BUG();
2935
a6483b79 2936 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2937}
2938
3a2dfbe8
MW		 2939static inline size_t xfrm_mapping_msgsize(void)
2940{
2941 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2942}
2943
2944static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2945 xfrm_address_t *new_saddr, __be16 new_sport)
2946{
2947 struct xfrm_user_mapping *um;
2948 struct nlmsghdr *nlh;
2949
2950 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2951 if (nlh == NULL)
2952 return -EMSGSIZE;
2953
2954 um = nlmsg_data(nlh);
2955
2956 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2957 um->id.spi = x->id.spi;
2958 um->id.family = x->props.family;
2959 um->id.proto = x->id.proto;
2960 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2961 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2962 um->new_sport = new_sport;
2963 um->old_sport = x->encap->encap_sport;
2964 um->reqid = x->props.reqid;
2965
2966 return nlmsg_end(skb, nlh);
2967}
2968
2969static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2970 __be16 sport)
2971{
a6483b79 2972 struct net *net = xs_net(x);
3a2dfbe8
MW		 2973 struct sk_buff *skb;
2974
2975 if (x->id.proto != IPPROTO_ESP)
2976 return -EINVAL;
2977
2978 if (!x->encap)
2979 return -EINVAL;
2980
2981 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2982 if (skb == NULL)
2983 return -ENOMEM;
2984
2985 if (build_mapping(skb, x, ipaddr, sport) < 0)
2986 BUG();
2987
a6483b79 2988 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2989}
2990
0f24558e
HG		 2991static bool xfrm_is_alive(const struct km_event *c)
2992{
2993 return (bool)xfrm_acquire_is_on(c->net);
2994}
2995
1da177e4
LT		 2996static struct xfrm_mgr netlink_mgr = {
2997 .id = "netlink",
2998 .notify = xfrm_send_state_notify,
2999 .acquire = xfrm_send_acquire,
3000 .compile_policy = xfrm_compile_policy,
3001 .notify_policy = xfrm_send_policy_notify,
97a64b45 3002 .report = xfrm_send_report,
5c79de6e 3003 .migrate = xfrm_send_migrate,
3a2dfbe8 3004 .new_mapping = xfrm_send_mapping,
0f24558e 3005 .is_alive = xfrm_is_alive,
1da177e4
LT		 3006};
3007
a6483b79 3008static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 3009{
be33690d 3010 struct sock *nlsk;
a31f2d17
PNA		 3011 struct netlink_kernel_cfg cfg = {
3012 .groups = XFRMNLGRP_MAX,
3013 .input = xfrm_netlink_rcv,
3014 };
be33690d 3015
9f00d977 3016 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3017 if (nlsk == NULL)
1da177e4 3018 return -ENOMEM;
d79d792e 3019 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3020 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3021 return 0;
3022}
3023
d79d792e 3024static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3025{
d79d792e
EB		 3026 struct net *net;
3027 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3028 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3029 synchronize_net();
3030 list_for_each_entry(net, net_exit_list, exit_list)
3031 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3032}
3033
a6483b79 3034static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3035 .init = xfrm_user_net_init,
3036 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3037};
3038
3039static int __init xfrm_user_init(void)
3040{
3041 int rv;
3042
3043 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3044
3045 rv = register_pernet_subsys(&xfrm_user_net_ops);
3046 if (rv < 0)
3047 return rv;
3048 rv = xfrm_register_km(&netlink_mgr);
3049 if (rv < 0)
3050 unregister_pernet_subsys(&xfrm_user_net_ops);
3051 return rv;
3052}
3053
3054static void __exit xfrm_user_exit(void)
3055{
3056 xfrm_unregister_km(&netlink_mgr);
3057 unregister_pernet_subsys(&xfrm_user_net_ops);
3058}
3059
1da177e4
LT		 3060module_init(xfrm_user_init);
3061module_exit(xfrm_user_exit);
3062MODULE_LICENSE("GPL");
4fdb3bb7 3063MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3064
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