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Fix common misspellings
[linux-2.6-block.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>
e23c7194
MN		 31#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
32#include <linux/in6.h>
33#endif
1da177e4 34
1a6509d9
HX		 35static inline int aead_len(struct xfrm_algo_aead *alg)
36{
37 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
38}
39
5424f32e 40static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 41{
5424f32e 42 struct nlattr *rt = attrs[type];
1da177e4
LT		 43 struct xfrm_algo *algp;
44
45 if (!rt)
46 return 0;
47
5424f32e 48 algp = nla_data(rt);
0f99be0d 49 if (nla_len(rt) < xfrm_alg_len(algp))
31c26852
HX		 50 return -EINVAL;
51
1da177e4
LT		 52 switch (type) {
53 case XFRMA_ALG_AUTH:
1da177e4 54 case XFRMA_ALG_CRYPT:
1da177e4 55 case XFRMA_ALG_COMP:
1da177e4
LT		 56 break;
57
58 default:
59 return -EINVAL;
3ff50b79 60 }
1da177e4
LT		 61
62 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
63 return 0;
64}
65
4447bb33
MW		 66static int verify_auth_trunc(struct nlattr **attrs)
67{
68 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
69 struct xfrm_algo_auth *algp;
70
71 if (!rt)
72 return 0;
73
74 algp = nla_data(rt);
75 if (nla_len(rt) < xfrm_alg_auth_len(algp))
76 return -EINVAL;
77
78 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
79 return 0;
80}
81
1a6509d9
HX		 82static int verify_aead(struct nlattr **attrs)
83{
84 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
85 struct xfrm_algo_aead *algp;
86
87 if (!rt)
88 return 0;
89
90 algp = nla_data(rt);
91 if (nla_len(rt) < aead_len(algp))
92 return -EINVAL;
93
94 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
95 return 0;
96}
97
5424f32e 98static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 99 xfrm_address_t **addrp)
100{
5424f32e 101 struct nlattr *rt = attrs[type];
eb2971b6 102
cf5cb79f 103 if (rt && addrp)
5424f32e 104 *addrp = nla_data(rt);
eb2971b6 105}
df71837d 106
5424f32e 107static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 108{
5424f32e 109 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 110 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 111
112 if (!rt)
113 return 0;
114
5424f32e 115 uctx = nla_data(rt);
cf5cb79f 116 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 117 return -EINVAL;
118
119 return 0;
120}
121
d8647b79
SK		 122static inline int verify_replay(struct xfrm_usersa_info *p,
123 struct nlattr **attrs)
124{
125 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
126
127 if (!rt)
128 return 0;
129
02aadf72
SK		 130 if (p->id.proto != IPPROTO_ESP)
131 return -EINVAL;
132
d8647b79
SK		 133 if (p->replay_window != 0)
134 return -EINVAL;
135
136 return 0;
137}
df71837d 138
1da177e4 139static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 140 struct nlattr **attrs)
1da177e4
LT		 141{
142 int err;
143
144 err = -EINVAL;
145 switch (p->family) {
146 case AF_INET:
147 break;
148
149 case AF_INET6:
150#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
151 break;
152#else
153 err = -EAFNOSUPPORT;
154 goto out;
155#endif
156
157 default:
158 goto out;
3ff50b79 159 }
1da177e4
LT		 160
161 err = -EINVAL;
162 switch (p->id.proto) {
163 case IPPROTO_AH:
4447bb33
MW		 164 if ((!attrs[XFRMA_ALG_AUTH] &&
165 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 166 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 167 attrs[XFRMA_ALG_CRYPT] ||
35d2856b
MW		 168 attrs[XFRMA_ALG_COMP] ||
169 attrs[XFRMA_TFCPAD])
1da177e4
LT		 170 goto out;
171 break;
172
173 case IPPROTO_ESP:
1a6509d9
HX		 174 if (attrs[XFRMA_ALG_COMP])
175 goto out;
176 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 177 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 178 !attrs[XFRMA_ALG_CRYPT] &&
179 !attrs[XFRMA_ALG_AEAD])
180 goto out;
181 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 182 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 183 attrs[XFRMA_ALG_CRYPT]) &&
184 attrs[XFRMA_ALG_AEAD])
1da177e4 185 goto out;
35d2856b
MW		 186 if (attrs[XFRMA_TFCPAD] &&
187 p->mode != XFRM_MODE_TUNNEL)
188 goto out;
1da177e4
LT		 189 break;
190
191 case IPPROTO_COMP:
35a7aa08 192 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 193 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 194 attrs[XFRMA_ALG_AUTH] ||
4447bb33 195 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b
MW		 196 attrs[XFRMA_ALG_CRYPT] ||
197 attrs[XFRMA_TFCPAD])
1da177e4
LT		 198 goto out;
199 break;
200
e23c7194
MN		 201#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
202 case IPPROTO_DSTOPTS:
203 case IPPROTO_ROUTING:
35a7aa08
TG		 204 if (attrs[XFRMA_ALG_COMP] ||
205 attrs[XFRMA_ALG_AUTH] ||
4447bb33 206 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 207 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 208 attrs[XFRMA_ALG_CRYPT] ||
209 attrs[XFRMA_ENCAP] ||
210 attrs[XFRMA_SEC_CTX] ||
35d2856b 211 attrs[XFRMA_TFCPAD] ||
35a7aa08 212 !attrs[XFRMA_COADDR])
e23c7194
MN		 213 goto out;
214 break;
215#endif
216
1da177e4
LT		 217 default:
218 goto out;
3ff50b79 219 }
1da177e4 220
1a6509d9
HX		 221 if ((err = verify_aead(attrs)))
222 goto out;
4447bb33
MW		 223 if ((err = verify_auth_trunc(attrs)))
224 goto out;
35a7aa08 225 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 226 goto out;
35a7aa08 227 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 228 goto out;
35a7aa08 229 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 230 goto out;
35a7aa08 231 if ((err = verify_sec_ctx_len(attrs)))
df71837d 232 goto out;
d8647b79
SK		 233 if ((err = verify_replay(p, attrs)))
234 goto out;
1da177e4
LT		 235
236 err = -EINVAL;
237 switch (p->mode) {
7e49e6de
MN		 238 case XFRM_MODE_TRANSPORT:
239 case XFRM_MODE_TUNNEL:
060f02a3 240 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 241 case XFRM_MODE_BEET:
1da177e4
LT		 242 break;
243
244 default:
245 goto out;
3ff50b79 246 }
1da177e4
LT		 247
248 err = 0;
249
250out:
251 return err;
252}
253
254static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 255 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 256 struct nlattr *rta)
1da177e4 257{
1da177e4
LT		 258 struct xfrm_algo *p, *ualg;
259 struct xfrm_algo_desc *algo;
260
261 if (!rta)
262 return 0;
263
5424f32e 264 ualg = nla_data(rta);
1da177e4
LT		 265
266 algo = get_byname(ualg->alg_name, 1);
267 if (!algo)
268 return -ENOSYS;
269 *props = algo->desc.sadb_alg_id;
270
0f99be0d 271 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 272 if (!p)
273 return -ENOMEM;
274
04ff1260 275 strcpy(p->alg_name, algo->name);
1da177e4
LT		 276 *algpp = p;
277 return 0;
278}
279
4447bb33
MW		 280static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
281 struct nlattr *rta)
282{
283 struct xfrm_algo *ualg;
284 struct xfrm_algo_auth *p;
285 struct xfrm_algo_desc *algo;
286
287 if (!rta)
288 return 0;
289
290 ualg = nla_data(rta);
291
292 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
293 if (!algo)
294 return -ENOSYS;
295 *props = algo->desc.sadb_alg_id;
296
297 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
298 if (!p)
299 return -ENOMEM;
300
301 strcpy(p->alg_name, algo->name);
302 p->alg_key_len = ualg->alg_key_len;
303 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
304 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
305
306 *algpp = p;
307 return 0;
308}
309
310static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
311 struct nlattr *rta)
312{
313 struct xfrm_algo_auth *p, *ualg;
314 struct xfrm_algo_desc *algo;
315
316 if (!rta)
317 return 0;
318
319 ualg = nla_data(rta);
320
321 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
322 if (!algo)
323 return -ENOSYS;
fa6dd8a2
ND		 324 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
325 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 326 return -EINVAL;
327 *props = algo->desc.sadb_alg_id;
328
329 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
330 if (!p)
331 return -ENOMEM;
332
333 strcpy(p->alg_name, algo->name);
334 if (!p->alg_trunc_len)
335 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
336
337 *algpp = p;
338 return 0;
339}
340
1a6509d9
HX		 341static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
342 struct nlattr *rta)
343{
344 struct xfrm_algo_aead *p, *ualg;
345 struct xfrm_algo_desc *algo;
346
347 if (!rta)
348 return 0;
349
350 ualg = nla_data(rta);
351
352 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
353 if (!algo)
354 return -ENOSYS;
355 *props = algo->desc.sadb_alg_id;
356
357 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
358 if (!p)
359 return -ENOMEM;
360
361 strcpy(p->alg_name, algo->name);
362 *algpp = p;
363 return 0;
364}
365
e2b19125
SK		 366static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
367 struct nlattr *rp)
368{
369 struct xfrm_replay_state_esn *up;
370
371 if (!replay_esn || !rp)
372 return 0;
373
374 up = nla_data(rp);
375
376 if (xfrm_replay_state_esn_len(replay_esn) !=
377 xfrm_replay_state_esn_len(up))
378 return -EINVAL;
379
380 return 0;
381}
382
d8647b79
SK		 383static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
384 struct xfrm_replay_state_esn **preplay_esn,
385 struct nlattr *rta)
386{
387 struct xfrm_replay_state_esn *p, *pp, *up;
388
389 if (!rta)
390 return 0;
391
392 up = nla_data(rta);
393
394 p = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL);
395 if (!p)
396 return -ENOMEM;
397
398 pp = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL);
399 if (!pp) {
400 kfree(p);
401 return -ENOMEM;
402 }
403
404 *replay_esn = p;
405 *preplay_esn = pp;
406
407 return 0;
408}
409
661697f7 410static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 411{
df71837d
TJ		 412 int len = 0;
413
414 if (xfrm_ctx) {
415 len += sizeof(struct xfrm_user_sec_ctx);
416 len += xfrm_ctx->ctx_len;
417 }
418 return len;
419}
420
1da177e4
LT		 421static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
422{
423 memcpy(&x->id, &p->id, sizeof(x->id));
424 memcpy(&x->sel, &p->sel, sizeof(x->sel));
425 memcpy(&x->lft, &p->lft, sizeof(x->lft));
426 x->props.mode = p->mode;
427 x->props.replay_window = p->replay_window;
428 x->props.reqid = p->reqid;
429 x->props.family = p->family;
54489c14 430 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 431 x->props.flags = p->flags;
196b0036 432
ccf9b3b8 433 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 434 x->sel.family = p->family;
1da177e4
LT		 435}
436
d51d081d
JHS		 437/*
438 * someday when pfkey also has support, we could have the code
439 * somehow made shareable and move it to xfrm_state.c - JHS
440 *
441*/
5424f32e 442static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
d51d081d 443{
5424f32e 444 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 445 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e
TG		 446 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
447 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
448 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 449
d8647b79
SK		 450 if (re) {
451 struct xfrm_replay_state_esn *replay_esn;
452 replay_esn = nla_data(re);
453 memcpy(x->replay_esn, replay_esn,
454 xfrm_replay_state_esn_len(replay_esn));
455 memcpy(x->preplay_esn, replay_esn,
456 xfrm_replay_state_esn_len(replay_esn));
457 }
458
d51d081d
JHS		 459 if (rp) {
460 struct xfrm_replay_state *replay;
5424f32e 461 replay = nla_data(rp);
d51d081d
JHS		 462 memcpy(&x->replay, replay, sizeof(*replay));
463 memcpy(&x->preplay, replay, sizeof(*replay));
464 }
465
466 if (lt) {
467 struct xfrm_lifetime_cur *ltime;
5424f32e 468 ltime = nla_data(lt);
d51d081d
JHS		 469 x->curlft.bytes = ltime->bytes;
470 x->curlft.packets = ltime->packets;
471 x->curlft.add_time = ltime->add_time;
472 x->curlft.use_time = ltime->use_time;
473 }
474
cf5cb79f 475 if (et)
5424f32e 476 x->replay_maxage = nla_get_u32(et);
d51d081d 477
cf5cb79f 478 if (rt)
5424f32e 479 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 480}
481
fc34acd3
AD		 482static struct xfrm_state *xfrm_state_construct(struct net *net,
483 struct xfrm_usersa_info *p,
5424f32e 484 struct nlattr **attrs,
1da177e4
LT		 485 int *errp)
486{
fc34acd3 487 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 488 int err = -ENOMEM;
489
490 if (!x)
491 goto error_no_put;
492
493 copy_from_user_state(x, p);
494
1a6509d9
HX		 495 if ((err = attach_aead(&x->aead, &x->props.ealgo,
496 attrs[XFRMA_ALG_AEAD])))
497 goto error;
4447bb33
MW		 498 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
499 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 500 goto error;
4447bb33
MW		 501 if (!x->props.aalgo) {
502 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
503 attrs[XFRMA_ALG_AUTH])))
504 goto error;
505 }
1da177e4
LT		 506 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
507 xfrm_ealg_get_byname,
35a7aa08 508 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 509 goto error;
510 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
511 xfrm_calg_get_byname,
35a7aa08 512 attrs[XFRMA_ALG_COMP])))
1da177e4 513 goto error;
fd21150a
TG		 514
515 if (attrs[XFRMA_ENCAP]) {
516 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
517 sizeof(*x->encap), GFP_KERNEL);
518 if (x->encap == NULL)
519 goto error;
520 }
521
35d2856b
MW		 522 if (attrs[XFRMA_TFCPAD])
523 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
524
fd21150a
TG		 525 if (attrs[XFRMA_COADDR]) {
526 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
527 sizeof(*x->coaddr), GFP_KERNEL);
528 if (x->coaddr == NULL)
529 goto error;
530 }
531
6f26b61e
JHS		 532 xfrm_mark_get(attrs, &x->mark);
533
a454f0cc 534 err = __xfrm_init_state(x, false);
1da177e4
LT		 535 if (err)
536 goto error;
537
fd21150a
TG		 538 if (attrs[XFRMA_SEC_CTX] &&
539 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 540 goto error;
541
d8647b79
SK		 542 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
543 attrs[XFRMA_REPLAY_ESN_VAL])))
544 goto error;
545
1da177e4 546 x->km.seq = p->seq;
b27aeadb 547 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 548 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 549 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 550
9fdc4883
SK		 551 if ((err = xfrm_init_replay(x)))
552 goto error;
d51d081d 553
9fdc4883 554 /* override default values from above */
5424f32e 555 xfrm_update_ae_params(x, attrs);
1da177e4
LT		 556
557 return x;
558
559error:
560 x->km.state = XFRM_STATE_DEAD;
561 xfrm_state_put(x);
562error_no_put:
563 *errp = err;
564 return NULL;
565}
566
22e70050 567static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 568 struct nlattr **attrs)
1da177e4 569{
fc34acd3 570 struct net *net = sock_net(skb->sk);
7b67c857 571 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 572 struct xfrm_state *x;
573 int err;
26b15dad 574 struct km_event c;
c53fa1ed
PM		 575 uid_t loginuid = audit_get_loginuid(current);
576 u32 sessionid = audit_get_sessionid(current);
577 u32 sid;
1da177e4 578
35a7aa08 579 err = verify_newsa_info(p, attrs);
1da177e4
LT		 580 if (err)
581 return err;
582
fc34acd3 583 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 584 if (!x)
585 return err;
586
26b15dad 587 xfrm_state_hold(x);
1da177e4
LT		 588 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
589 err = xfrm_state_add(x);
590 else
591 err = xfrm_state_update(x);
592
c53fa1ed 593 security_task_getsecid(current, &sid);
2532386f 594 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 595
1da177e4
LT		 596 if (err < 0) {
597 x->km.state = XFRM_STATE_DEAD;
21380b81 598 __xfrm_state_put(x);
7d6dfe1f 599 goto out;
1da177e4
LT		 600 }
601
26b15dad
JHS		 602 c.seq = nlh->nlmsg_seq;
603 c.pid = nlh->nlmsg_pid;
f60f6b8f 604 c.event = nlh->nlmsg_type;
26b15dad
JHS		 605
606 km_state_notify(x, &c);
7d6dfe1f 607out:
26b15dad 608 xfrm_state_put(x);
1da177e4
LT		 609 return err;
610}
611
fc34acd3
AD		 612static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
613 struct xfrm_usersa_id *p,
5424f32e 614 struct nlattr **attrs,
eb2971b6
MN		 615 int *errp)
616{
617 struct xfrm_state *x = NULL;
6f26b61e 618 struct xfrm_mark m;
eb2971b6 619 int err;
6f26b61e 620 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 621
622 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
623 err = -ESRCH;
6f26b61e 624 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 625 } else {
626 xfrm_address_t *saddr = NULL;
627
35a7aa08 628 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 629 if (!saddr) {
630 err = -EINVAL;
631 goto out;
632 }
633
9abbffee 634 err = -ESRCH;
6f26b61e
JHS		 635 x = xfrm_state_lookup_byaddr(net, mark,
636 &p->daddr, saddr,
221df1ed 637 p->proto, p->family);
eb2971b6
MN		 638 }
639
640 out:
641 if (!x && errp)
642 *errp = err;
643 return x;
644}
645
22e70050 646static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 647 struct nlattr **attrs)
1da177e4 648{
fc34acd3 649 struct net *net = sock_net(skb->sk);
1da177e4 650 struct xfrm_state *x;
eb2971b6 651 int err = -ESRCH;
26b15dad 652 struct km_event c;
7b67c857 653 struct xfrm_usersa_id *p = nlmsg_data(nlh);
c53fa1ed
PM		 654 uid_t loginuid = audit_get_loginuid(current);
655 u32 sessionid = audit_get_sessionid(current);
656 u32 sid;
1da177e4 657
fc34acd3 658 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 659 if (x == NULL)
eb2971b6 660 return err;
1da177e4 661
6f68dc37 662 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 663 goto out;
664
1da177e4 665 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 666 err = -EPERM;
667 goto out;
1da177e4
LT		 668 }
669
26b15dad 670 err = xfrm_state_delete(x);
161a09e7 671
c8c05a8e
CZ		 672 if (err < 0)
673 goto out;
26b15dad
JHS		 674
675 c.seq = nlh->nlmsg_seq;
676 c.pid = nlh->nlmsg_pid;
f60f6b8f 677 c.event = nlh->nlmsg_type;
26b15dad 678 km_state_notify(x, &c);
1da177e4 679
c8c05a8e 680out:
c53fa1ed 681 security_task_getsecid(current, &sid);
2532386f 682 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
c8c05a8e 683 xfrm_state_put(x);
26b15dad 684 return err;
1da177e4
LT		 685}
686
687static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
688{
689 memcpy(&p->id, &x->id, sizeof(p->id));
690 memcpy(&p->sel, &x->sel, sizeof(p->sel));
691 memcpy(&p->lft, &x->lft, sizeof(p->lft));
692 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
693 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 694 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 695 p->mode = x->props.mode;
696 p->replay_window = x->props.replay_window;
697 p->reqid = x->props.reqid;
698 p->family = x->props.family;
699 p->flags = x->props.flags;
700 p->seq = x->km.seq;
701}
702
703struct xfrm_dump_info {
704 struct sk_buff *in_skb;
705 struct sk_buff *out_skb;
706 u32 nlmsg_seq;
707 u16 nlmsg_flags;
1da177e4
LT		 708};
709
c0144bea
TG		 710static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
711{
c0144bea
TG		 712 struct xfrm_user_sec_ctx *uctx;
713 struct nlattr *attr;
68325d3b 714 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 715
716 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
717 if (attr == NULL)
718 return -EMSGSIZE;
719
720 uctx = nla_data(attr);
721 uctx->exttype = XFRMA_SEC_CTX;
722 uctx->len = ctx_size;
723 uctx->ctx_doi = s->ctx_doi;
724 uctx->ctx_alg = s->ctx_alg;
725 uctx->ctx_len = s->ctx_len;
726 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
727
728 return 0;
729}
730
4447bb33
MW		 731static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
732{
733 struct xfrm_algo *algo;
734 struct nlattr *nla;
735
736 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
737 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
738 if (!nla)
739 return -EMSGSIZE;
740
741 algo = nla_data(nla);
742 strcpy(algo->alg_name, auth->alg_name);
743 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
744 algo->alg_key_len = auth->alg_key_len;
745
746 return 0;
747}
748
68325d3b
HX		 749/* Don't change this without updating xfrm_sa_len! */
750static int copy_to_user_state_extra(struct xfrm_state *x,
751 struct xfrm_usersa_info *p,
752 struct sk_buff *skb)
1da177e4 753{
1da177e4
LT		 754 copy_to_user_state(x, p);
755
050f009e
HX		 756 if (x->coaddr)
757 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
758
759 if (x->lastused)
760 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
050f009e 761
1a6509d9
HX		 762 if (x->aead)
763 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
4447bb33
MW		 764 if (x->aalg) {
765 if (copy_to_user_auth(x->aalg, skb))
766 goto nla_put_failure;
767
768 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
769 xfrm_alg_auth_len(x->aalg), x->aalg);
770 }
1da177e4 771 if (x->ealg)
0f99be0d 772 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
1da177e4 773 if (x->calg)
c0144bea 774 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1da177e4
LT		 775
776 if (x->encap)
c0144bea 777 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1da177e4 778
35d2856b
MW		 779 if (x->tfcpad)
780 NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad);
781
6f26b61e
JHS		 782 if (xfrm_mark_put(skb, &x->mark))
783 goto nla_put_failure;
784
d8647b79
SK		 785 if (x->replay_esn)
786 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
787 xfrm_replay_state_esn_len(x->replay_esn), x->replay_esn);
788
c0144bea
TG		 789 if (x->security && copy_sec_ctx(x->security, skb) < 0)
790 goto nla_put_failure;
060f02a3 791
68325d3b
HX		 792 return 0;
793
794nla_put_failure:
795 return -EMSGSIZE;
796}
797
798static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
799{
800 struct xfrm_dump_info *sp = ptr;
801 struct sk_buff *in_skb = sp->in_skb;
802 struct sk_buff *skb = sp->out_skb;
803 struct xfrm_usersa_info *p;
804 struct nlmsghdr *nlh;
805 int err;
806
68325d3b
HX		 807 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
808 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
809 if (nlh == NULL)
810 return -EMSGSIZE;
811
812 p = nlmsg_data(nlh);
813
814 err = copy_to_user_state_extra(x, p, skb);
815 if (err)
816 goto nla_put_failure;
817
9825069d 818 nlmsg_end(skb, nlh);
1da177e4
LT		 819 return 0;
820
c0144bea 821nla_put_failure:
9825069d 822 nlmsg_cancel(skb, nlh);
68325d3b 823 return err;
1da177e4
LT		 824}
825
4c563f76
TT		 826static int xfrm_dump_sa_done(struct netlink_callback *cb)
827{
828 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
829 xfrm_state_walk_done(walk);
830 return 0;
831}
832
1da177e4
LT		 833static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
834{
fc34acd3 835 struct net *net = sock_net(skb->sk);
4c563f76 836 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 837 struct xfrm_dump_info info;
838
4c563f76
TT		 839 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
840 sizeof(cb->args) - sizeof(cb->args[0]));
841
1da177e4
LT		 842 info.in_skb = cb->skb;
843 info.out_skb = skb;
844 info.nlmsg_seq = cb->nlh->nlmsg_seq;
845 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 846
847 if (!cb->args[0]) {
848 cb->args[0] = 1;
849 xfrm_state_walk_init(walk, 0);
850 }
851
fc34acd3 852 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 853
854 return skb->len;
855}
856
857static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
858 struct xfrm_state *x, u32 seq)
859{
860 struct xfrm_dump_info info;
861 struct sk_buff *skb;
862
7deb2264 863 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 864 if (!skb)
865 return ERR_PTR(-ENOMEM);
866
1da177e4
LT		 867 info.in_skb = in_skb;
868 info.out_skb = skb;
869 info.nlmsg_seq = seq;
870 info.nlmsg_flags = 0;
1da177e4
LT		 871
872 if (dump_one_state(x, 0, &info)) {
873 kfree_skb(skb);
874 return NULL;
875 }
876
877 return skb;
878}
879
7deb2264
TG		 880static inline size_t xfrm_spdinfo_msgsize(void)
881{
882 return NLMSG_ALIGN(4)
883 + nla_total_size(sizeof(struct xfrmu_spdinfo))
884 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
885}
886
e071041b
AD		 887static int build_spdinfo(struct sk_buff *skb, struct net *net,
888 u32 pid, u32 seq, u32 flags)
ecfd6b18 889{
5a6d3416
JHS		 890 struct xfrmk_spdinfo si;
891 struct xfrmu_spdinfo spc;
892 struct xfrmu_spdhinfo sph;
ecfd6b18
JHS		 893 struct nlmsghdr *nlh;
894 u32 *f;
895
896 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 897 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 898 return -EMSGSIZE;
899
900 f = nlmsg_data(nlh);
901 *f = flags;
e071041b 902 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 903 spc.incnt = si.incnt;
904 spc.outcnt = si.outcnt;
905 spc.fwdcnt = si.fwdcnt;
906 spc.inscnt = si.inscnt;
907 spc.outscnt = si.outscnt;
908 spc.fwdscnt = si.fwdscnt;
909 sph.spdhcnt = si.spdhcnt;
910 sph.spdhmcnt = si.spdhmcnt;
911
912 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
913 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
ecfd6b18
JHS		 914
915 return nlmsg_end(skb, nlh);
916
917nla_put_failure:
918 nlmsg_cancel(skb, nlh);
919 return -EMSGSIZE;
920}
921
922static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 923 struct nlattr **attrs)
ecfd6b18 924{
a6483b79 925 struct net *net = sock_net(skb->sk);
ecfd6b18 926 struct sk_buff *r_skb;
7b67c857 927 u32 *flags = nlmsg_data(nlh);
ecfd6b18
JHS		 928 u32 spid = NETLINK_CB(skb).pid;
929 u32 seq = nlh->nlmsg_seq;
ecfd6b18 930
7deb2264 931 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 932 if (r_skb == NULL)
933 return -ENOMEM;
934
e071041b 935 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
ecfd6b18
JHS		 936 BUG();
937
a6483b79 938 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
ecfd6b18
JHS		 939}
940
7deb2264
TG		 941static inline size_t xfrm_sadinfo_msgsize(void)
942{
943 return NLMSG_ALIGN(4)
944 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
945 + nla_total_size(4); /* XFRMA_SAD_CNT */
946}
947
e071041b
AD		 948static int build_sadinfo(struct sk_buff *skb, struct net *net,
949 u32 pid, u32 seq, u32 flags)
28d8909b 950{
af11e316
JHS		 951 struct xfrmk_sadinfo si;
952 struct xfrmu_sadhinfo sh;
28d8909b
JHS		 953 struct nlmsghdr *nlh;
954 u32 *f;
955
956 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 957 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 958 return -EMSGSIZE;
959
960 f = nlmsg_data(nlh);
961 *f = flags;
e071041b 962 xfrm_sad_getinfo(net, &si);
28d8909b 963
af11e316
JHS		 964 sh.sadhmcnt = si.sadhmcnt;
965 sh.sadhcnt = si.sadhcnt;
966
967 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
968 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
28d8909b
JHS		 969
970 return nlmsg_end(skb, nlh);
971
972nla_put_failure:
973 nlmsg_cancel(skb, nlh);
974 return -EMSGSIZE;
975}
976
977static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 978 struct nlattr **attrs)
28d8909b 979{
a6483b79 980 struct net *net = sock_net(skb->sk);
28d8909b 981 struct sk_buff *r_skb;
7b67c857 982 u32 *flags = nlmsg_data(nlh);
28d8909b
JHS		 983 u32 spid = NETLINK_CB(skb).pid;
984 u32 seq = nlh->nlmsg_seq;
28d8909b 985
7deb2264 986 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 987 if (r_skb == NULL)
988 return -ENOMEM;
989
e071041b 990 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
28d8909b
JHS		 991 BUG();
992
a6483b79 993 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
28d8909b
JHS		 994}
995
22e70050 996static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 997 struct nlattr **attrs)
1da177e4 998{
fc34acd3 999 struct net *net = sock_net(skb->sk);
7b67c857 1000 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1001 struct xfrm_state *x;
1002 struct sk_buff *resp_skb;
eb2971b6 1003 int err = -ESRCH;
1da177e4 1004
fc34acd3 1005 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1006 if (x == NULL)
1007 goto out_noput;
1008
1009 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1010 if (IS_ERR(resp_skb)) {
1011 err = PTR_ERR(resp_skb);
1012 } else {
a6483b79 1013 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 1014 }
1015 xfrm_state_put(x);
1016out_noput:
1017 return err;
1018}
1019
1020static int verify_userspi_info(struct xfrm_userspi_info *p)
1021{
1022 switch (p->info.id.proto) {
1023 case IPPROTO_AH:
1024 case IPPROTO_ESP:
1025 break;
1026
1027 case IPPROTO_COMP:
1028 /* IPCOMP spi is 16-bits. */
1029 if (p->max >= 0x10000)
1030 return -EINVAL;
1031 break;
1032
1033 default:
1034 return -EINVAL;
3ff50b79 1035 }
1da177e4
LT		 1036
1037 if (p->min > p->max)
1038 return -EINVAL;
1039
1040 return 0;
1041}
1042
22e70050 1043static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1044 struct nlattr **attrs)
1da177e4 1045{
fc34acd3 1046 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1047 struct xfrm_state *x;
1048 struct xfrm_userspi_info *p;
1049 struct sk_buff *resp_skb;
1050 xfrm_address_t *daddr;
1051 int family;
1052 int err;
6f26b61e
JHS		 1053 u32 mark;
1054 struct xfrm_mark m;
1da177e4 1055
7b67c857 1056 p = nlmsg_data(nlh);
1da177e4
LT		 1057 err = verify_userspi_info(p);
1058 if (err)
1059 goto out_noput;
1060
1061 family = p->info.family;
1062 daddr = &p->info.id.daddr;
1063
1064 x = NULL;
6f26b61e
JHS		 1065
1066 mark = xfrm_mark_get(attrs, &m);
1da177e4 1067 if (p->info.seq) {
6f26b61e 1068 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1da177e4
LT		 1069 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
1070 xfrm_state_put(x);
1071 x = NULL;
1072 }
1073 }
1074
1075 if (!x)
6f26b61e 1076 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1077 p->info.id.proto, daddr,
1078 &p->info.saddr, 1,
1079 family);
1080 err = -ENOENT;
1081 if (x == NULL)
1082 goto out_noput;
1083
658b219e
HX		 1084 err = xfrm_alloc_spi(x, p->min, p->max);
1085 if (err)
1086 goto out;
1da177e4 1087
658b219e 1088 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1089 if (IS_ERR(resp_skb)) {
1090 err = PTR_ERR(resp_skb);
1091 goto out;
1092 }
1093
a6483b79 1094 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 1095
1096out:
1097 xfrm_state_put(x);
1098out_noput:
1099 return err;
1100}
1101
b798a9ed 1102static int verify_policy_dir(u8 dir)
1da177e4
LT		 1103{
1104 switch (dir) {
1105 case XFRM_POLICY_IN:
1106 case XFRM_POLICY_OUT:
1107 case XFRM_POLICY_FWD:
1108 break;
1109
1110 default:
1111 return -EINVAL;
3ff50b79 1112 }
1da177e4
LT		 1113
1114 return 0;
1115}
1116
b798a9ed 1117static int verify_policy_type(u8 type)
f7b6983f
MN		 1118{
1119 switch (type) {
1120 case XFRM_POLICY_TYPE_MAIN:
1121#ifdef CONFIG_XFRM_SUB_POLICY
1122 case XFRM_POLICY_TYPE_SUB:
1123#endif
1124 break;
1125
1126 default:
1127 return -EINVAL;
3ff50b79 1128 }
f7b6983f
MN		 1129
1130 return 0;
1131}
1132
1da177e4
LT		 1133static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1134{
1135 switch (p->share) {
1136 case XFRM_SHARE_ANY:
1137 case XFRM_SHARE_SESSION:
1138 case XFRM_SHARE_USER:
1139 case XFRM_SHARE_UNIQUE:
1140 break;
1141
1142 default:
1143 return -EINVAL;
3ff50b79 1144 }
1da177e4
LT		 1145
1146 switch (p->action) {
1147 case XFRM_POLICY_ALLOW:
1148 case XFRM_POLICY_BLOCK:
1149 break;
1150
1151 default:
1152 return -EINVAL;
3ff50b79 1153 }
1da177e4
LT		 1154
1155 switch (p->sel.family) {
1156 case AF_INET:
1157 break;
1158
1159 case AF_INET6:
1160#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1161 break;
1162#else
1163 return -EAFNOSUPPORT;
1164#endif
1165
1166 default:
1167 return -EINVAL;
3ff50b79 1168 }
1da177e4
LT		 1169
1170 return verify_policy_dir(p->dir);
1171}
1172
5424f32e 1173static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1174{
5424f32e 1175 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1176 struct xfrm_user_sec_ctx *uctx;
1177
1178 if (!rt)
1179 return 0;
1180
5424f32e 1181 uctx = nla_data(rt);
03e1ad7b 1182 return security_xfrm_policy_alloc(&pol->security, uctx);
df71837d
TJ		 1183}
1184
1da177e4
LT		 1185static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1186 int nr)
1187{
1188 int i;
1189
1190 xp->xfrm_nr = nr;
1191 for (i = 0; i < nr; i++, ut++) {
1192 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1193
1194 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1195 memcpy(&t->saddr, &ut->saddr,
1196 sizeof(xfrm_address_t));
1197 t->reqid = ut->reqid;
1198 t->mode = ut->mode;
1199 t->share = ut->share;
1200 t->optional = ut->optional;
1201 t->aalgos = ut->aalgos;
1202 t->ealgos = ut->ealgos;
1203 t->calgos = ut->calgos;
c5d18e98
HX		 1204 /* If all masks are ~0, then we allow all algorithms. */
1205 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1206 t->encap_family = ut->family;
1da177e4
LT		 1207 }
1208}
1209
b4ad86bf
DM		 1210static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1211{
1212 int i;
1213
1214 if (nr > XFRM_MAX_DEPTH)
1215 return -EINVAL;
1216
1217 for (i = 0; i < nr; i++) {
1218 /* We never validated the ut->family value, so many
1219 * applications simply leave it at zero. The check was
1220 * never made and ut->family was ignored because all
1221 * templates could be assumed to have the same family as
1222 * the policy itself. Now that we will have ipv4-in-ipv6
1223 * and ipv6-in-ipv4 tunnels, this is no longer true.
1224 */
1225 if (!ut[i].family)
1226 ut[i].family = family;
1227
1228 switch (ut[i].family) {
1229 case AF_INET:
1230 break;
1231#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1232 case AF_INET6:
1233 break;
1234#endif
1235 default:
1236 return -EINVAL;
3ff50b79 1237 }
b4ad86bf
DM		 1238 }
1239
1240 return 0;
1241}
1242
5424f32e 1243static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1244{
5424f32e 1245 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1246
1247 if (!rt) {
1248 pol->xfrm_nr = 0;
1249 } else {
5424f32e
TG		 1250 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1251 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1252 int err;
1da177e4 1253
b4ad86bf
DM		 1254 err = validate_tmpl(nr, utmpl, pol->family);
1255 if (err)
1256 return err;
1da177e4 1257
5424f32e 1258 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1259 }
1260 return 0;
1261}
1262
5424f32e 1263static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1264{
5424f32e 1265 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1266 struct xfrm_userpolicy_type *upt;
b798a9ed 1267 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1268 int err;
1269
1270 if (rt) {
5424f32e 1271 upt = nla_data(rt);
f7b6983f
MN		 1272 type = upt->type;
1273 }
1274
1275 err = verify_policy_type(type);
1276 if (err)
1277 return err;
1278
1279 *tp = type;
1280 return 0;
1281}
1282
1da177e4
LT		 1283static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1284{
1285 xp->priority = p->priority;
1286 xp->index = p->index;
1287 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1288 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1289 xp->action = p->action;
1290 xp->flags = p->flags;
1291 xp->family = p->sel.family;
1292 /* XXX xp->share = p->share; */
1293}
1294
1295static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1296{
1297 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1298 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1299 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1300 p->priority = xp->priority;
1301 p->index = xp->index;
1302 p->sel.family = xp->family;
1303 p->dir = dir;
1304 p->action = xp->action;
1305 p->flags = xp->flags;
1306 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1307}
1308
fc34acd3 1309static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1310{
fc34acd3 1311 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1312 int err;
1313
1314 if (!xp) {
1315 *errp = -ENOMEM;
1316 return NULL;
1317 }
1318
1319 copy_from_user_policy(xp, p);
df71837d 1320
35a7aa08 1321 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1322 if (err)
1323 goto error;
1324
35a7aa08
TG		 1325 if (!(err = copy_from_user_tmpl(xp, attrs)))
1326 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1327 if (err)
1328 goto error;
1da177e4 1329
295fae56
JHS		 1330 xfrm_mark_get(attrs, &xp->mark);
1331
1da177e4 1332 return xp;
f7b6983f
MN		 1333 error:
1334 *errp = err;
12a169e7 1335 xp->walk.dead = 1;
64c31b3f 1336 xfrm_policy_destroy(xp);
f7b6983f 1337 return NULL;
1da177e4
LT		 1338}
1339
22e70050 1340static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1341 struct nlattr **attrs)
1da177e4 1342{
fc34acd3 1343 struct net *net = sock_net(skb->sk);
7b67c857 1344 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1345 struct xfrm_policy *xp;
26b15dad 1346 struct km_event c;
1da177e4
LT		 1347 int err;
1348 int excl;
c53fa1ed
PM		 1349 uid_t loginuid = audit_get_loginuid(current);
1350 u32 sessionid = audit_get_sessionid(current);
1351 u32 sid;
1da177e4
LT		 1352
1353 err = verify_newpolicy_info(p);
df71837d
TJ		 1354 if (err)
1355 return err;
35a7aa08 1356 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1357 if (err)
1358 return err;
1359
fc34acd3 1360 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1361 if (!xp)
1362 return err;
1363
25985edc 1364 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1365 * Aha! this is anti-netlink really i.e more pfkey derived
1366 * in netlink excl is a flag and you wouldnt need
1367 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1368 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1369 err = xfrm_policy_insert(p->dir, xp, excl);
c53fa1ed 1370 security_task_getsecid(current, &sid);
2532386f 1371 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 1372
1da177e4 1373 if (err) {
03e1ad7b 1374 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1375 kfree(xp);
1376 return err;
1377 }
1378
f60f6b8f 1379 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1380 c.seq = nlh->nlmsg_seq;
1381 c.pid = nlh->nlmsg_pid;
1382 km_policy_notify(xp, p->dir, &c);
1383
1da177e4
LT		 1384 xfrm_pol_put(xp);
1385
1386 return 0;
1387}
1388
1389static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1390{
1391 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1392 int i;
1393
1394 if (xp->xfrm_nr == 0)
1395 return 0;
1396
1397 for (i = 0; i < xp->xfrm_nr; i++) {
1398 struct xfrm_user_tmpl *up = &vec[i];
1399 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1400
1401 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1402 up->family = kp->encap_family;
1da177e4
LT		 1403 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1404 up->reqid = kp->reqid;
1405 up->mode = kp->mode;
1406 up->share = kp->share;
1407 up->optional = kp->optional;
1408 up->aalgos = kp->aalgos;
1409 up->ealgos = kp->ealgos;
1410 up->calgos = kp->calgos;
1411 }
df71837d 1412
c0144bea
TG		 1413 return nla_put(skb, XFRMA_TMPL,
1414 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1415}
1416
1417static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1418{
1419 if (x->security) {
1420 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1421 }
1422 return 0;
0d681623 1423}
df71837d 1424
0d681623
SH		 1425static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1426{
1427 if (xp->security) {
1428 return copy_sec_ctx(xp->security, skb);
1429 }
1430 return 0;
df71837d 1431}
cfbfd45a
TG		 1432static inline size_t userpolicy_type_attrsize(void)
1433{
1434#ifdef CONFIG_XFRM_SUB_POLICY
1435 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1436#else
1437 return 0;
1438#endif
1439}
df71837d 1440
f7b6983f 1441#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1442static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1443{
c0144bea
TG		 1444 struct xfrm_userpolicy_type upt = {
1445 .type = type,
1446 };
f7b6983f 1447
c0144bea 1448 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1449}
1450
1451#else
b798a9ed 1452static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1453{
1454 return 0;
1455}
1456#endif
1457
1da177e4
LT		 1458static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1459{
1460 struct xfrm_dump_info *sp = ptr;
1461 struct xfrm_userpolicy_info *p;
1462 struct sk_buff *in_skb = sp->in_skb;
1463 struct sk_buff *skb = sp->out_skb;
1464 struct nlmsghdr *nlh;
1da177e4 1465
79b8b7f4
TG		 1466 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1467 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1468 if (nlh == NULL)
1469 return -EMSGSIZE;
1da177e4 1470
7b67c857 1471 p = nlmsg_data(nlh);
1da177e4
LT		 1472 copy_to_user_policy(xp, p, dir);
1473 if (copy_to_user_tmpl(xp, skb) < 0)
1474 goto nlmsg_failure;
df71837d
TJ		 1475 if (copy_to_user_sec_ctx(xp, skb))
1476 goto nlmsg_failure;
1459bb36 1477 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 1478 goto nlmsg_failure;
295fae56
JHS		 1479 if (xfrm_mark_put(skb, &xp->mark))
1480 goto nla_put_failure;
1da177e4 1481
9825069d 1482 nlmsg_end(skb, nlh);
1da177e4
LT		 1483 return 0;
1484
295fae56 1485nla_put_failure:
1da177e4 1486nlmsg_failure:
9825069d
TG		 1487 nlmsg_cancel(skb, nlh);
1488 return -EMSGSIZE;
1da177e4
LT		 1489}
1490
4c563f76
TT		 1491static int xfrm_dump_policy_done(struct netlink_callback *cb)
1492{
1493 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1494
1495 xfrm_policy_walk_done(walk);
1496 return 0;
1497}
1498
1da177e4
LT		 1499static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1500{
fc34acd3 1501 struct net *net = sock_net(skb->sk);
4c563f76 1502 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1503 struct xfrm_dump_info info;
1504
4c563f76
TT		 1505 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1506 sizeof(cb->args) - sizeof(cb->args[0]));
1507
1da177e4
LT		 1508 info.in_skb = cb->skb;
1509 info.out_skb = skb;
1510 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1511 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1512
1513 if (!cb->args[0]) {
1514 cb->args[0] = 1;
1515 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1516 }
1517
fc34acd3 1518 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1519
1520 return skb->len;
1521}
1522
1523static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1524 struct xfrm_policy *xp,
1525 int dir, u32 seq)
1526{
1527 struct xfrm_dump_info info;
1528 struct sk_buff *skb;
1529
7deb2264 1530 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1531 if (!skb)
1532 return ERR_PTR(-ENOMEM);
1533
1da177e4
LT		 1534 info.in_skb = in_skb;
1535 info.out_skb = skb;
1536 info.nlmsg_seq = seq;
1537 info.nlmsg_flags = 0;
1da177e4
LT		 1538
1539 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1540 kfree_skb(skb);
1541 return NULL;
1542 }
1543
1544 return skb;
1545}
1546
22e70050 1547static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1548 struct nlattr **attrs)
1da177e4 1549{
fc34acd3 1550 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1551 struct xfrm_policy *xp;
1552 struct xfrm_userpolicy_id *p;
b798a9ed 1553 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1554 int err;
26b15dad 1555 struct km_event c;
1da177e4 1556 int delete;
295fae56
JHS		 1557 struct xfrm_mark m;
1558 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1559
7b67c857 1560 p = nlmsg_data(nlh);
1da177e4
LT		 1561 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1562
35a7aa08 1563 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1564 if (err)
1565 return err;
1566
1da177e4
LT		 1567 err = verify_policy_dir(p->dir);
1568 if (err)
1569 return err;
1570
1571 if (p->index)
295fae56 1572 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1573 else {
5424f32e 1574 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1575 struct xfrm_sec_ctx *ctx;
df71837d 1576
35a7aa08 1577 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1578 if (err)
1579 return err;
1580
2c8dd116 1581 ctx = NULL;
df71837d 1582 if (rt) {
5424f32e 1583 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1584
03e1ad7b
PM		 1585 err = security_xfrm_policy_alloc(&ctx, uctx);
1586 if (err)
df71837d 1587 return err;
2c8dd116 1588 }
295fae56 1589 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1590 ctx, delete, &err);
03e1ad7b 1591 security_xfrm_policy_free(ctx);
df71837d 1592 }
1da177e4
LT		 1593 if (xp == NULL)
1594 return -ENOENT;
1595
1596 if (!delete) {
1597 struct sk_buff *resp_skb;
1598
1599 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1600 if (IS_ERR(resp_skb)) {
1601 err = PTR_ERR(resp_skb);
1602 } else {
a6483b79 1603 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
082a1ad5 1604 NETLINK_CB(skb).pid);
1da177e4 1605 }
26b15dad 1606 } else {
c53fa1ed
PM		 1607 uid_t loginuid = audit_get_loginuid(current);
1608 u32 sessionid = audit_get_sessionid(current);
1609 u32 sid;
2532386f 1610
c53fa1ed 1611 security_task_getsecid(current, &sid);
2532386f
EP		 1612 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1613 sid);
13fcfbb0
DM		 1614
1615 if (err != 0)
c8c05a8e 1616 goto out;
13fcfbb0 1617
e7443892 1618 c.data.byid = p->index;
f60f6b8f 1619 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1620 c.seq = nlh->nlmsg_seq;
1621 c.pid = nlh->nlmsg_pid;
1622 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1623 }
1624
c8c05a8e 1625out:
ef41aaa0 1626 xfrm_pol_put(xp);
1da177e4
LT		 1627 return err;
1628}
1629
22e70050 1630static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1631 struct nlattr **attrs)
1da177e4 1632{
fc34acd3 1633 struct net *net = sock_net(skb->sk);
26b15dad 1634 struct km_event c;
7b67c857 1635 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1636 struct xfrm_audit audit_info;
4aa2e62c 1637 int err;
1da177e4 1638
c53fa1ed
PM		 1639 audit_info.loginuid = audit_get_loginuid(current);
1640 audit_info.sessionid = audit_get_sessionid(current);
1641 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1642 err = xfrm_state_flush(net, p->proto, &audit_info);
9e64cc95
JHS		 1643 if (err) {
1644 if (err == -ESRCH) /* empty table */
1645 return 0;
069c474e 1646 return err;
9e64cc95 1647 }
bf08867f 1648 c.data.proto = p->proto;
f60f6b8f 1649 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1650 c.seq = nlh->nlmsg_seq;
1651 c.pid = nlh->nlmsg_pid;
7067802e 1652 c.net = net;
26b15dad
JHS		 1653 km_state_notify(NULL, &c);
1654
1da177e4
LT		 1655 return 0;
1656}
1657
d8647b79 1658static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1659{
d8647b79
SK		 1660 size_t replay_size = x->replay_esn ?
1661 xfrm_replay_state_esn_len(x->replay_esn) :
1662 sizeof(struct xfrm_replay_state);
1663
7deb2264 1664 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1665 + nla_total_size(replay_size)
7deb2264 1666 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1667 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1668 + nla_total_size(4) /* XFRM_AE_RTHR */
1669 + nla_total_size(4); /* XFRM_AE_ETHR */
1670}
d51d081d 1671
214e005b 1672static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1673{
1674 struct xfrm_aevent_id *id;
1675 struct nlmsghdr *nlh;
d51d081d 1676
79b8b7f4
TG		 1677 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1678 if (nlh == NULL)
1679 return -EMSGSIZE;
d51d081d 1680
7b67c857 1681 id = nlmsg_data(nlh);
2b5f6dcc 1682 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1683 id->sa_id.spi = x->id.spi;
1684 id->sa_id.family = x->props.family;
1685 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1686 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1687 id->reqid = x->props.reqid;
d51d081d
JHS		 1688 id->flags = c->data.aevent;
1689
d8647b79
SK		 1690 if (x->replay_esn)
1691 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
1692 xfrm_replay_state_esn_len(x->replay_esn),
1693 x->replay_esn);
1694 else
1695 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1696
c0144bea 1697 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
d51d081d 1698
c0144bea
TG		 1699 if (id->flags & XFRM_AE_RTHR)
1700 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
d51d081d 1701
c0144bea
TG		 1702 if (id->flags & XFRM_AE_ETHR)
1703 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1704 x->replay_maxage * 10 / HZ);
d51d081d 1705
6f26b61e
JHS		 1706 if (xfrm_mark_put(skb, &x->mark))
1707 goto nla_put_failure;
1708
9825069d 1709 return nlmsg_end(skb, nlh);
d51d081d 1710
c0144bea 1711nla_put_failure:
9825069d
TG		 1712 nlmsg_cancel(skb, nlh);
1713 return -EMSGSIZE;
d51d081d
JHS		 1714}
1715
22e70050 1716static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1717 struct nlattr **attrs)
d51d081d 1718{
fc34acd3 1719 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1720 struct xfrm_state *x;
1721 struct sk_buff *r_skb;
1722 int err;
1723 struct km_event c;
6f26b61e
JHS		 1724 u32 mark;
1725 struct xfrm_mark m;
7b67c857 1726 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1727 struct xfrm_usersa_id *id = &p->sa_id;
1728
6f26b61e
JHS		 1729 mark = xfrm_mark_get(attrs, &m);
1730
1731 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1732 if (x == NULL)
d51d081d 1733 return -ESRCH;
d8647b79
SK		 1734
1735 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1736 if (r_skb == NULL) {
1737 xfrm_state_put(x);
1738 return -ENOMEM;
d51d081d
JHS		 1739 }
1740
1741 /*
1742 * XXX: is this lock really needed - none of the other
1743 * gets lock (the concern is things getting updated
1744 * while we are still reading) - jhs
1745 */
1746 spin_lock_bh(&x->lock);
1747 c.data.aevent = p->flags;
1748 c.seq = nlh->nlmsg_seq;
1749 c.pid = nlh->nlmsg_pid;
1750
1751 if (build_aevent(r_skb, x, &c) < 0)
1752 BUG();
a6483b79 1753 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
d51d081d
JHS		 1754 spin_unlock_bh(&x->lock);
1755 xfrm_state_put(x);
1756 return err;
1757}
1758
22e70050 1759static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1760 struct nlattr **attrs)
d51d081d 1761{
fc34acd3 1762 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1763 struct xfrm_state *x;
1764 struct km_event c;
1765 int err = - EINVAL;
6f26b61e
JHS		 1766 u32 mark = 0;
1767 struct xfrm_mark m;
7b67c857 1768 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1769 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1770 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1771 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d 1772
d8647b79 1773 if (!lt && !rp && !re)
d51d081d
JHS		 1774 return err;
1775
1776 /* pedantic mode - thou shalt sayeth replaceth */
1777 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1778 return err;
1779
6f26b61e
JHS		 1780 mark = xfrm_mark_get(attrs, &m);
1781
1782 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1783 if (x == NULL)
1784 return -ESRCH;
1785
1786 if (x->km.state != XFRM_STATE_VALID)
1787 goto out;
1788
e2b19125
SK		 1789 err = xfrm_replay_verify_len(x->replay_esn, rp);
1790 if (err)
1791 goto out;
1792
d51d081d 1793 spin_lock_bh(&x->lock);
35a7aa08 1794 xfrm_update_ae_params(x, attrs);
d51d081d 1795 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1796
1797 c.event = nlh->nlmsg_type;
1798 c.seq = nlh->nlmsg_seq;
1799 c.pid = nlh->nlmsg_pid;
1800 c.data.aevent = XFRM_AE_CU;
1801 km_state_notify(x, &c);
1802 err = 0;
1803out:
1804 xfrm_state_put(x);
1805 return err;
1806}
1807
22e70050 1808static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1809 struct nlattr **attrs)
1da177e4 1810{
fc34acd3 1811 struct net *net = sock_net(skb->sk);
f7b6983f 1812 struct km_event c;
b798a9ed 1813 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1814 int err;
161a09e7 1815 struct xfrm_audit audit_info;
f7b6983f 1816
35a7aa08 1817 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1818 if (err)
1819 return err;
26b15dad 1820
c53fa1ed
PM		 1821 audit_info.loginuid = audit_get_loginuid(current);
1822 audit_info.sessionid = audit_get_sessionid(current);
1823 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1824 err = xfrm_policy_flush(net, type, &audit_info);
2f1eb65f
JHS		 1825 if (err) {
1826 if (err == -ESRCH) /* empty table */
1827 return 0;
069c474e 1828 return err;
2f1eb65f
JHS		 1829 }
1830
f7b6983f 1831 c.data.type = type;
f60f6b8f 1832 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1833 c.seq = nlh->nlmsg_seq;
1834 c.pid = nlh->nlmsg_pid;
7067802e 1835 c.net = net;
26b15dad 1836 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1837 return 0;
1838}
1839
22e70050 1840static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1841 struct nlattr **attrs)
6c5c8ca7 1842{
fc34acd3 1843 struct net *net = sock_net(skb->sk);
6c5c8ca7 1844 struct xfrm_policy *xp;
7b67c857 1845 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1846 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1847 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 1848 int err = -ENOENT;
295fae56
JHS		 1849 struct xfrm_mark m;
1850 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 1851
35a7aa08 1852 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1853 if (err)
1854 return err;
1855
c8bf4d04
TT		 1856 err = verify_policy_dir(p->dir);
1857 if (err)
1858 return err;
1859
6c5c8ca7 1860 if (p->index)
295fae56 1861 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 1862 else {
5424f32e 1863 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1864 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1865
35a7aa08 1866 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1867 if (err)
1868 return err;
1869
2c8dd116 1870 ctx = NULL;
6c5c8ca7 1871 if (rt) {
5424f32e 1872 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1873
03e1ad7b
PM		 1874 err = security_xfrm_policy_alloc(&ctx, uctx);
1875 if (err)
6c5c8ca7 1876 return err;
2c8dd116 1877 }
295fae56 1878 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 1879 &p->sel, ctx, 0, &err);
03e1ad7b 1880 security_xfrm_policy_free(ctx);
6c5c8ca7 1881 }
6c5c8ca7 1882 if (xp == NULL)
ef41aaa0 1883 return -ENOENT;
03e1ad7b 1884
ea2dea9d 1885 if (unlikely(xp->walk.dead))
6c5c8ca7 1886 goto out;
6c5c8ca7 1887
6c5c8ca7
JHS		 1888 err = 0;
1889 if (up->hard) {
c53fa1ed
PM		 1890 uid_t loginuid = audit_get_loginuid(current);
1891 u32 sessionid = audit_get_sessionid(current);
1892 u32 sid;
1893
1894 security_task_getsecid(current, &sid);
6c5c8ca7 1895 xfrm_policy_delete(xp, p->dir);
2532386f 1896 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
161a09e7 1897
6c5c8ca7
JHS		 1898 } else {
1899 // reset the timers here?
62db5cfd 1900 WARN(1, "Dont know what to do with soft policy expire\n");
6c5c8ca7
JHS		 1901 }
1902 km_policy_expired(xp, p->dir, up->hard, current->pid);
1903
1904out:
1905 xfrm_pol_put(xp);
1906 return err;
1907}
1908
22e70050 1909static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1910 struct nlattr **attrs)
53bc6b4d 1911{
fc34acd3 1912 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 1913 struct xfrm_state *x;
1914 int err;
7b67c857 1915 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 1916 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 1917 struct xfrm_mark m;
928497f0 1918 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 1919
6f26b61e 1920 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1921
3a765aa5 1922 err = -ENOENT;
53bc6b4d
JHS		 1923 if (x == NULL)
1924 return err;
1925
53bc6b4d 1926 spin_lock_bh(&x->lock);
3a765aa5 1927 err = -EINVAL;
53bc6b4d
JHS		 1928 if (x->km.state != XFRM_STATE_VALID)
1929 goto out;
1930 km_state_expired(x, ue->hard, current->pid);
1931
161a09e7 1932 if (ue->hard) {
c53fa1ed
PM		 1933 uid_t loginuid = audit_get_loginuid(current);
1934 u32 sessionid = audit_get_sessionid(current);
1935 u32 sid;
1936
1937 security_task_getsecid(current, &sid);
53bc6b4d 1938 __xfrm_state_delete(x);
2532386f 1939 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
161a09e7 1940 }
3a765aa5 1941 err = 0;
53bc6b4d
JHS		 1942out:
1943 spin_unlock_bh(&x->lock);
1944 xfrm_state_put(x);
1945 return err;
1946}
1947
22e70050 1948static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1949 struct nlattr **attrs)
980ebd25 1950{
fc34acd3 1951 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 1952 struct xfrm_policy *xp;
1953 struct xfrm_user_tmpl *ut;
1954 int i;
5424f32e 1955 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 1956 struct xfrm_mark mark;
980ebd25 1957
7b67c857 1958 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 1959 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 1960 int err = -ENOMEM;
1961
1962 if (!x)
d8eb9307 1963 goto nomem;
980ebd25 1964
6f26b61e
JHS		 1965 xfrm_mark_get(attrs, &mark);
1966
980ebd25 1967 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 1968 if (err)
1969 goto bad_policy;
980ebd25
JHS		 1970
1971 /* build an XP */
fc34acd3 1972 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 1973 if (!xp)
1974 goto free_state;
980ebd25
JHS		 1975
1976 memcpy(&x->id, &ua->id, sizeof(ua->id));
1977 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1978 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 1979 xp->mark.m = x->mark.m = mark.m;
1980 xp->mark.v = x->mark.v = mark.v;
5424f32e 1981 ut = nla_data(rt);
980ebd25
JHS		 1982 /* extract the templates and for each call km_key */
1983 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1984 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1985 memcpy(&x->id, &t->id, sizeof(x->id));
1986 x->props.mode = t->mode;
1987 x->props.reqid = t->reqid;
1988 x->props.family = ut->family;
1989 t->aalgos = ua->aalgos;
1990 t->ealgos = ua->ealgos;
1991 t->calgos = ua->calgos;
1992 err = km_query(x, t, xp);
1993
1994 }
1995
1996 kfree(x);
1997 kfree(xp);
1998
1999 return 0;
d8eb9307
IJ		 2000
2001bad_policy:
62db5cfd 2002 WARN(1, "BAD policy passed\n");
d8eb9307
IJ		 2003free_state:
2004 kfree(x);
2005nomem:
2006 return err;
980ebd25
JHS		 2007}
2008
5c79de6e 2009#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2010static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2011 struct xfrm_kmaddress *k,
5424f32e 2012 struct nlattr **attrs, int *num)
5c79de6e 2013{
5424f32e 2014 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2015 struct xfrm_user_migrate *um;
2016 int i, num_migrate;
2017
13c1d189
AE		 2018 if (k != NULL) {
2019 struct xfrm_user_kmaddress *uk;
2020
2021 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2022 memcpy(&k->local, &uk->local, sizeof(k->local));
2023 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2024 k->family = uk->family;
2025 k->reserved = uk->reserved;
2026 }
2027
5424f32e
TG		 2028 um = nla_data(rt);
2029 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2030
2031 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2032 return -EINVAL;
2033
2034 for (i = 0; i < num_migrate; i++, um++, ma++) {
2035 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2036 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2037 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2038 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2039
2040 ma->proto = um->proto;
2041 ma->mode = um->mode;
2042 ma->reqid = um->reqid;
2043
2044 ma->old_family = um->old_family;
2045 ma->new_family = um->new_family;
2046 }
2047
2048 *num = i;
2049 return 0;
2050}
2051
2052static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2053 struct nlattr **attrs)
5c79de6e 2054{
7b67c857 2055 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2056 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2057 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2058 u8 type;
2059 int err;
2060 int n = 0;
2061
35a7aa08 2062 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2063 return -EINVAL;
5c79de6e 2064
13c1d189
AE		 2065 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2066
5424f32e 2067 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2068 if (err)
2069 return err;
2070
13c1d189 2071 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2072 if (err)
2073 return err;
2074
2075 if (!n)
2076 return 0;
2077
13c1d189 2078 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
5c79de6e
SS		 2079
2080 return 0;
2081}
2082#else
2083static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2084 struct nlattr **attrs)
5c79de6e
SS		 2085{
2086 return -ENOPROTOOPT;
2087}
2088#endif
2089
2090#ifdef CONFIG_XFRM_MIGRATE
183cad12 2091static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2092{
2093 struct xfrm_user_migrate um;
2094
2095 memset(&um, 0, sizeof(um));
2096 um.proto = m->proto;
2097 um.mode = m->mode;
2098 um.reqid = m->reqid;
2099 um.old_family = m->old_family;
2100 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2101 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2102 um.new_family = m->new_family;
2103 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2104 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2105
c0144bea 2106 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2107}
2108
183cad12 2109static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2110{
2111 struct xfrm_user_kmaddress uk;
2112
2113 memset(&uk, 0, sizeof(uk));
2114 uk.family = k->family;
2115 uk.reserved = k->reserved;
2116 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2117 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2118
2119 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2120}
2121
2122static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 2123{
2124 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 2125 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2126 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2127 + userpolicy_type_attrsize();
7deb2264
TG		 2128}
2129
183cad12
DM		 2130static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2131 int num_migrate, const struct xfrm_kmaddress *k,
2132 const struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e 2133{
183cad12 2134 const struct xfrm_migrate *mp;
5c79de6e
SS		 2135 struct xfrm_userpolicy_id *pol_id;
2136 struct nlmsghdr *nlh;
5c79de6e
SS		 2137 int i;
2138
79b8b7f4
TG		 2139 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2140 if (nlh == NULL)
2141 return -EMSGSIZE;
5c79de6e 2142
7b67c857 2143 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2144 /* copy data from selector, dir, and type to the pol_id */
2145 memset(pol_id, 0, sizeof(*pol_id));
2146 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2147 pol_id->dir = dir;
2148
13c1d189
AE		 2149 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
2150 goto nlmsg_failure;
2151
5c79de6e
SS		 2152 if (copy_to_user_policy_type(type, skb) < 0)
2153 goto nlmsg_failure;
2154
2155 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2156 if (copy_to_user_migrate(mp, skb) < 0)
2157 goto nlmsg_failure;
2158 }
2159
9825069d 2160 return nlmsg_end(skb, nlh);
5c79de6e 2161nlmsg_failure:
9825069d
TG		 2162 nlmsg_cancel(skb, nlh);
2163 return -EMSGSIZE;
5c79de6e
SS		 2164}
2165
183cad12
DM		 2166static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2167 const struct xfrm_migrate *m, int num_migrate,
2168 const struct xfrm_kmaddress *k)
5c79de6e 2169{
a6483b79 2170 struct net *net = &init_net;
5c79de6e 2171 struct sk_buff *skb;
5c79de6e 2172
13c1d189 2173 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2174 if (skb == NULL)
2175 return -ENOMEM;
2176
2177 /* build migrate */
13c1d189 2178 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2179 BUG();
2180
a6483b79 2181 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 2182}
2183#else
183cad12
DM		 2184static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2185 const struct xfrm_migrate *m, int num_migrate,
2186 const struct xfrm_kmaddress *k)
5c79de6e
SS		 2187{
2188 return -ENOPROTOOPT;
2189}
2190#endif
d51d081d 2191
a7bd9a45 2192#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2193
2194static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2195 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2196 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2197 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2198 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2199 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2200 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2201 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2202 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2203 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2204 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2205 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2206 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2207 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2208 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2209 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2210 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2211 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2212 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 2213 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2214 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2215};
2216
492b558b
TG		 2217#undef XMSGSIZE
2218
cf5cb79f 2219static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2220 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2221 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2222 [XFRMA_LASTUSED] = { .type = NLA_U64},
2223 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2224 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2225 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2226 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2227 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2228 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2229 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2230 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2231 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2232 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2233 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2234 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2235 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2236 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2237 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2238 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2239 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2240 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2241 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2242 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
cf5cb79f
TG		 2243};
2244
1da177e4 2245static struct xfrm_link {
5424f32e 2246 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2247 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2248 int (*done)(struct netlink_callback *);
492b558b
TG		 2249} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2250 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2251 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2252 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2253 .dump = xfrm_dump_sa,
2254 .done = xfrm_dump_sa_done },
492b558b
TG		 2255 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2256 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2257 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2258 .dump = xfrm_dump_policy,
2259 .done = xfrm_dump_policy_done },
492b558b 2260 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2261 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2262 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2263 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2264 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2265 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2266 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2267 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2268 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2269 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2270 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2271 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 2272 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2273};
2274
1d00a4eb 2275static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2276{
a6483b79 2277 struct net *net = sock_net(skb->sk);
35a7aa08 2278 struct nlattr *attrs[XFRMA_MAX+1];
1da177e4 2279 struct xfrm_link *link;
a7bd9a45 2280 int type, err;
1da177e4 2281
1da177e4 2282 type = nlh->nlmsg_type;
1da177e4 2283 if (type > XFRM_MSG_MAX)
1d00a4eb 2284 return -EINVAL;
1da177e4
LT		 2285
2286 type -= XFRM_MSG_BASE;
2287 link = &xfrm_dispatch[type];
2288
2289 /* All operations require privileges, even GET */
1d00a4eb
TG		 2290 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2291 return -EPERM;
1da177e4 2292
492b558b
TG		 2293 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2294 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2295 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2296 if (link->dump == NULL)
1d00a4eb 2297 return -EINVAL;
88fc2c84 2298
a6483b79 2299 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
1da177e4
LT		 2300 }
2301
35a7aa08 2302 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2303 xfrma_policy);
a7bd9a45
TG		 2304 if (err < 0)
2305 return err;
1da177e4
LT		 2306
2307 if (link->doit == NULL)
1d00a4eb 2308 return -EINVAL;
1da177e4 2309
5424f32e 2310 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2311}
2312
cd40b7d3 2313static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2314{
cd40b7d3
DL		 2315 mutex_lock(&xfrm_cfg_mutex);
2316 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2317 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 2318}
2319
7deb2264
TG		 2320static inline size_t xfrm_expire_msgsize(void)
2321{
6f26b61e
JHS		 2322 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2323 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2324}
2325
214e005b 2326static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2327{
2328 struct xfrm_user_expire *ue;
2329 struct nlmsghdr *nlh;
1da177e4 2330
79b8b7f4
TG		 2331 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2332 if (nlh == NULL)
2333 return -EMSGSIZE;
1da177e4 2334
7b67c857 2335 ue = nlmsg_data(nlh);
1da177e4 2336 copy_to_user_state(x, &ue->state);
d51d081d 2337 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2338
6f26b61e
JHS		 2339 if (xfrm_mark_put(skb, &x->mark))
2340 goto nla_put_failure;
2341
9825069d 2342 return nlmsg_end(skb, nlh);
6f26b61e
JHS		 2343
2344nla_put_failure:
2345 return -EMSGSIZE;
1da177e4
LT		 2346}
2347
214e005b 2348static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2349{
fc34acd3 2350 struct net *net = xs_net(x);
1da177e4
LT		 2351 struct sk_buff *skb;
2352
7deb2264 2353 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2354 if (skb == NULL)
2355 return -ENOMEM;
2356
6f26b61e
JHS		 2357 if (build_expire(skb, x, c) < 0) {
2358 kfree_skb(skb);
2359 return -EMSGSIZE;
2360 }
1da177e4 2361
a6483b79 2362 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2363}
2364
214e005b 2365static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2366{
fc34acd3 2367 struct net *net = xs_net(x);
d51d081d 2368 struct sk_buff *skb;
d51d081d 2369
d8647b79 2370 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2371 if (skb == NULL)
2372 return -ENOMEM;
2373
2374 if (build_aevent(skb, x, c) < 0)
2375 BUG();
2376
a6483b79 2377 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2378}
2379
214e005b 2380static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2381{
7067802e 2382 struct net *net = c->net;
26b15dad
JHS		 2383 struct xfrm_usersa_flush *p;
2384 struct nlmsghdr *nlh;
2385 struct sk_buff *skb;
7deb2264 2386 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2387
7deb2264 2388 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2389 if (skb == NULL)
2390 return -ENOMEM;
26b15dad 2391
79b8b7f4
TG		 2392 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2393 if (nlh == NULL) {
2394 kfree_skb(skb);
2395 return -EMSGSIZE;
2396 }
26b15dad 2397
7b67c857 2398 p = nlmsg_data(nlh);
bf08867f 2399 p->proto = c->data.proto;
26b15dad 2400
9825069d 2401 nlmsg_end(skb, nlh);
26b15dad 2402
a6483b79 2403 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2404}
2405
7deb2264 2406static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2407{
7deb2264 2408 size_t l = 0;
1a6509d9
HX		 2409 if (x->aead)
2410 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2411 if (x->aalg) {
2412 l += nla_total_size(sizeof(struct xfrm_algo) +
2413 (x->aalg->alg_key_len + 7) / 8);
2414 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2415 }
26b15dad 2416 if (x->ealg)
0f99be0d 2417 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2418 if (x->calg)
7deb2264 2419 l += nla_total_size(sizeof(*x->calg));
26b15dad 2420 if (x->encap)
7deb2264 2421 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2422 if (x->tfcpad)
2423 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2424 if (x->replay_esn)
2425 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
68325d3b
HX		 2426 if (x->security)
2427 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2428 x->security->ctx_len);
2429 if (x->coaddr)
2430 l += nla_total_size(sizeof(*x->coaddr));
2431
d26f3984
HX		 2432 /* Must count x->lastused as it may become non-zero behind our back. */
2433 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2434
2435 return l;
2436}
2437
214e005b 2438static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2439{
fc34acd3 2440 struct net *net = xs_net(x);
26b15dad 2441 struct xfrm_usersa_info *p;
0603eac0 2442 struct xfrm_usersa_id *id;
26b15dad
JHS		 2443 struct nlmsghdr *nlh;
2444 struct sk_buff *skb;
26b15dad 2445 int len = xfrm_sa_len(x);
0603eac0
HX		 2446 int headlen;
2447
2448 headlen = sizeof(*p);
2449 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2450 len += nla_total_size(headlen);
0603eac0 2451 headlen = sizeof(*id);
6f26b61e 2452 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2453 }
7deb2264 2454 len += NLMSG_ALIGN(headlen);
26b15dad 2455
7deb2264 2456 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2457 if (skb == NULL)
2458 return -ENOMEM;
26b15dad 2459
79b8b7f4
TG		 2460 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2461 if (nlh == NULL)
c0144bea 2462 goto nla_put_failure;
26b15dad 2463
7b67c857 2464 p = nlmsg_data(nlh);
0603eac0 2465 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2466 struct nlattr *attr;
2467
7b67c857 2468 id = nlmsg_data(nlh);
0603eac0
HX		 2469 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2470 id->spi = x->id.spi;
2471 id->family = x->props.family;
2472 id->proto = x->id.proto;
2473
c0144bea
TG		 2474 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2475 if (attr == NULL)
2476 goto nla_put_failure;
2477
2478 p = nla_data(attr);
0603eac0
HX		 2479 }
2480
68325d3b
HX		 2481 if (copy_to_user_state_extra(x, p, skb))
2482 goto nla_put_failure;
26b15dad 2483
9825069d 2484 nlmsg_end(skb, nlh);
26b15dad 2485
a6483b79 2486 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2487
c0144bea 2488nla_put_failure:
68325d3b
HX		 2489 /* Somebody screwed up with xfrm_sa_len! */
2490 WARN_ON(1);
26b15dad
JHS		 2491 kfree_skb(skb);
2492 return -1;
2493}
2494
214e005b 2495static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2496{
2497
2498 switch (c->event) {
f60f6b8f 2499 case XFRM_MSG_EXPIRE:
26b15dad 2500 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2501 case XFRM_MSG_NEWAE:
2502 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2503 case XFRM_MSG_DELSA:
2504 case XFRM_MSG_UPDSA:
2505 case XFRM_MSG_NEWSA:
26b15dad 2506 return xfrm_notify_sa(x, c);
f60f6b8f 2507 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2508 return xfrm_notify_sa_flush(c);
2509 default:
62db5cfd 2510 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2511 c->event);
2512 break;
26b15dad
JHS		 2513 }
2514
2515 return 0;
2516
2517}
2518
7deb2264
TG		 2519static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2520 struct xfrm_policy *xp)
2521{
2522 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2523 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2524 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2525 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2526 + userpolicy_type_attrsize();
2527}
2528
1da177e4
LT		 2529static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2530 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2531 int dir)
2532{
2533 struct xfrm_user_acquire *ua;
2534 struct nlmsghdr *nlh;
1da177e4
LT		 2535 __u32 seq = xfrm_get_acqseq();
2536
79b8b7f4
TG		 2537 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2538 if (nlh == NULL)
2539 return -EMSGSIZE;
1da177e4 2540
7b67c857 2541 ua = nlmsg_data(nlh);
1da177e4
LT		 2542 memcpy(&ua->id, &x->id, sizeof(ua->id));
2543 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2544 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2545 copy_to_user_policy(xp, &ua->policy, dir);
2546 ua->aalgos = xt->aalgos;
2547 ua->ealgos = xt->ealgos;
2548 ua->calgos = xt->calgos;
2549 ua->seq = x->km.seq = seq;
2550
2551 if (copy_to_user_tmpl(xp, skb) < 0)
2552 goto nlmsg_failure;
0d681623 2553 if (copy_to_user_state_sec_ctx(x, skb))
df71837d 2554 goto nlmsg_failure;
1459bb36 2555 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2556 goto nlmsg_failure;
295fae56
JHS		 2557 if (xfrm_mark_put(skb, &xp->mark))
2558 goto nla_put_failure;
1da177e4 2559
9825069d 2560 return nlmsg_end(skb, nlh);
1da177e4 2561
295fae56 2562nla_put_failure:
1da177e4 2563nlmsg_failure:
9825069d
TG		 2564 nlmsg_cancel(skb, nlh);
2565 return -EMSGSIZE;
1da177e4
LT		 2566}
2567
2568static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2569 struct xfrm_policy *xp, int dir)
2570{
a6483b79 2571 struct net *net = xs_net(x);
1da177e4 2572 struct sk_buff *skb;
1da177e4 2573
7deb2264 2574 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2575 if (skb == NULL)
2576 return -ENOMEM;
2577
2578 if (build_acquire(skb, x, xt, xp, dir) < 0)
2579 BUG();
2580
a6483b79 2581 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2582}
2583
2584/* User gives us xfrm_user_policy_info followed by an array of 0
2585 * or more templates.
2586 */
cb969f07 2587static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2588 u8 *data, int len, int *dir)
2589{
fc34acd3 2590 struct net *net = sock_net(sk);
1da177e4
LT		 2591 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2592 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2593 struct xfrm_policy *xp;
2594 int nr;
2595
cb969f07 2596 switch (sk->sk_family) {
1da177e4
LT		 2597 case AF_INET:
2598 if (opt != IP_XFRM_POLICY) {
2599 *dir = -EOPNOTSUPP;
2600 return NULL;
2601 }
2602 break;
2603#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2604 case AF_INET6:
2605 if (opt != IPV6_XFRM_POLICY) {
2606 *dir = -EOPNOTSUPP;
2607 return NULL;
2608 }
2609 break;
2610#endif
2611 default:
2612 *dir = -EINVAL;
2613 return NULL;
2614 }
2615
2616 *dir = -EINVAL;
2617
2618 if (len < sizeof(*p) ||
2619 verify_newpolicy_info(p))
2620 return NULL;
2621
2622 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2623 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2624 return NULL;
2625
a4f1bac6
HX		 2626 if (p->dir > XFRM_POLICY_OUT)
2627 return NULL;
2628
2f09a4d5 2629 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2630 if (xp == NULL) {
2631 *dir = -ENOBUFS;
2632 return NULL;
2633 }
2634
2635 copy_from_user_policy(xp, p);
f7b6983f 2636 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2637 copy_templates(xp, ut, nr);
2638
2639 *dir = p->dir;
2640
2641 return xp;
2642}
2643
7deb2264
TG		 2644static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2645{
2646 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2647 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2648 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2649 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2650 + userpolicy_type_attrsize();
2651}
2652
1da177e4 2653static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2654 int dir, const struct km_event *c)
1da177e4
LT		 2655{
2656 struct xfrm_user_polexpire *upe;
2657 struct nlmsghdr *nlh;
d51d081d 2658 int hard = c->data.hard;
1da177e4 2659
79b8b7f4
TG		 2660 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2661 if (nlh == NULL)
2662 return -EMSGSIZE;
1da177e4 2663
7b67c857 2664 upe = nlmsg_data(nlh);
1da177e4
LT		 2665 copy_to_user_policy(xp, &upe->pol, dir);
2666 if (copy_to_user_tmpl(xp, skb) < 0)
2667 goto nlmsg_failure;
df71837d
TJ		 2668 if (copy_to_user_sec_ctx(xp, skb))
2669 goto nlmsg_failure;
1459bb36 2670 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2671 goto nlmsg_failure;
295fae56
JHS		 2672 if (xfrm_mark_put(skb, &xp->mark))
2673 goto nla_put_failure;
1da177e4
LT		 2674 upe->hard = !!hard;
2675
9825069d 2676 return nlmsg_end(skb, nlh);
1da177e4 2677
295fae56 2678nla_put_failure:
1da177e4 2679nlmsg_failure:
9825069d
TG		 2680 nlmsg_cancel(skb, nlh);
2681 return -EMSGSIZE;
1da177e4
LT		 2682}
2683
214e005b 2684static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2685{
fc34acd3 2686 struct net *net = xp_net(xp);
1da177e4 2687 struct sk_buff *skb;
1da177e4 2688
7deb2264 2689 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2690 if (skb == NULL)
2691 return -ENOMEM;
2692
d51d081d 2693 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2694 BUG();
2695
a6483b79 2696 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2697}
2698
214e005b 2699static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2700{
fc34acd3 2701 struct net *net = xp_net(xp);
26b15dad 2702 struct xfrm_userpolicy_info *p;
0603eac0 2703 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2704 struct nlmsghdr *nlh;
2705 struct sk_buff *skb;
7deb2264 2706 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
0603eac0
HX		 2707 int headlen;
2708
2709 headlen = sizeof(*p);
2710 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2711 len += nla_total_size(headlen);
0603eac0
HX		 2712 headlen = sizeof(*id);
2713 }
cfbfd45a 2714 len += userpolicy_type_attrsize();
295fae56 2715 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2716 len += NLMSG_ALIGN(headlen);
26b15dad 2717
7deb2264 2718 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2719 if (skb == NULL)
2720 return -ENOMEM;
26b15dad 2721
79b8b7f4
TG		 2722 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2723 if (nlh == NULL)
2724 goto nlmsg_failure;
26b15dad 2725
7b67c857 2726 p = nlmsg_data(nlh);
0603eac0 2727 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2728 struct nlattr *attr;
2729
7b67c857 2730 id = nlmsg_data(nlh);
0603eac0
HX		 2731 memset(id, 0, sizeof(*id));
2732 id->dir = dir;
2733 if (c->data.byid)
2734 id->index = xp->index;
2735 else
2736 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2737
c0144bea
TG		 2738 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2739 if (attr == NULL)
2740 goto nlmsg_failure;
2741
2742 p = nla_data(attr);
0603eac0 2743 }
26b15dad 2744
26b15dad
JHS		 2745 copy_to_user_policy(xp, p, dir);
2746 if (copy_to_user_tmpl(xp, skb) < 0)
2747 goto nlmsg_failure;
1459bb36 2748 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2749 goto nlmsg_failure;
26b15dad 2750
295fae56
JHS		 2751 if (xfrm_mark_put(skb, &xp->mark))
2752 goto nla_put_failure;
2753
9825069d 2754 nlmsg_end(skb, nlh);
26b15dad 2755
a6483b79 2756 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2757
295fae56 2758nla_put_failure:
26b15dad
JHS		 2759nlmsg_failure:
2760 kfree_skb(skb);
2761 return -1;
2762}
2763
214e005b 2764static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 2765{
7067802e 2766 struct net *net = c->net;
26b15dad
JHS		 2767 struct nlmsghdr *nlh;
2768 struct sk_buff *skb;
26b15dad 2769
7deb2264 2770 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2771 if (skb == NULL)
2772 return -ENOMEM;
26b15dad 2773
79b8b7f4
TG		 2774 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2775 if (nlh == NULL)
2776 goto nlmsg_failure;
0c51f53c
JHS		 2777 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2778 goto nlmsg_failure;
26b15dad 2779
9825069d 2780 nlmsg_end(skb, nlh);
26b15dad 2781
a6483b79 2782 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2783
2784nlmsg_failure:
2785 kfree_skb(skb);
2786 return -1;
2787}
2788
214e005b 2789static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2790{
2791
2792 switch (c->event) {
f60f6b8f
HX		 2793 case XFRM_MSG_NEWPOLICY:
2794 case XFRM_MSG_UPDPOLICY:
2795 case XFRM_MSG_DELPOLICY:
26b15dad 2796 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2797 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2798 return xfrm_notify_policy_flush(c);
f60f6b8f 2799 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2800 return xfrm_exp_policy_notify(xp, dir, c);
2801 default:
62db5cfd 2802 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2803 c->event);
26b15dad
JHS		 2804 }
2805
2806 return 0;
2807
2808}
2809
7deb2264
TG		 2810static inline size_t xfrm_report_msgsize(void)
2811{
2812 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2813}
2814
97a64b45
MN		 2815static int build_report(struct sk_buff *skb, u8 proto,
2816 struct xfrm_selector *sel, xfrm_address_t *addr)
2817{
2818 struct xfrm_user_report *ur;
2819 struct nlmsghdr *nlh;
97a64b45 2820
79b8b7f4
TG		 2821 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2822 if (nlh == NULL)
2823 return -EMSGSIZE;
97a64b45 2824
7b67c857 2825 ur = nlmsg_data(nlh);
97a64b45
MN		 2826 ur->proto = proto;
2827 memcpy(&ur->sel, sel, sizeof(ur->sel));
2828
2829 if (addr)
c0144bea 2830 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
97a64b45 2831
9825069d 2832 return nlmsg_end(skb, nlh);
97a64b45 2833
c0144bea 2834nla_put_failure:
9825069d
TG		 2835 nlmsg_cancel(skb, nlh);
2836 return -EMSGSIZE;
97a64b45
MN		 2837}
2838
db983c11
AD		 2839static int xfrm_send_report(struct net *net, u8 proto,
2840 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2841{
2842 struct sk_buff *skb;
97a64b45 2843
7deb2264 2844 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2845 if (skb == NULL)
2846 return -ENOMEM;
2847
2848 if (build_report(skb, proto, sel, addr) < 0)
2849 BUG();
2850
a6483b79 2851 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2852}
2853
3a2dfbe8
MW		 2854static inline size_t xfrm_mapping_msgsize(void)
2855{
2856 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2857}
2858
2859static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2860 xfrm_address_t *new_saddr, __be16 new_sport)
2861{
2862 struct xfrm_user_mapping *um;
2863 struct nlmsghdr *nlh;
2864
2865 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2866 if (nlh == NULL)
2867 return -EMSGSIZE;
2868
2869 um = nlmsg_data(nlh);
2870
2871 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2872 um->id.spi = x->id.spi;
2873 um->id.family = x->props.family;
2874 um->id.proto = x->id.proto;
2875 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2876 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2877 um->new_sport = new_sport;
2878 um->old_sport = x->encap->encap_sport;
2879 um->reqid = x->props.reqid;
2880
2881 return nlmsg_end(skb, nlh);
2882}
2883
2884static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2885 __be16 sport)
2886{
a6483b79 2887 struct net *net = xs_net(x);
3a2dfbe8
MW		 2888 struct sk_buff *skb;
2889
2890 if (x->id.proto != IPPROTO_ESP)
2891 return -EINVAL;
2892
2893 if (!x->encap)
2894 return -EINVAL;
2895
2896 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2897 if (skb == NULL)
2898 return -ENOMEM;
2899
2900 if (build_mapping(skb, x, ipaddr, sport) < 0)
2901 BUG();
2902
a6483b79 2903 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2904}
2905
1da177e4
LT		 2906static struct xfrm_mgr netlink_mgr = {
2907 .id = "netlink",
2908 .notify = xfrm_send_state_notify,
2909 .acquire = xfrm_send_acquire,
2910 .compile_policy = xfrm_compile_policy,
2911 .notify_policy = xfrm_send_policy_notify,
97a64b45 2912 .report = xfrm_send_report,
5c79de6e 2913 .migrate = xfrm_send_migrate,
3a2dfbe8 2914 .new_mapping = xfrm_send_mapping,
1da177e4
LT		 2915};
2916
a6483b79 2917static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 2918{
be33690d
PM		 2919 struct sock *nlsk;
2920
a6483b79 2921 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
af65bdfc 2922 xfrm_netlink_rcv, NULL, THIS_MODULE);
be33690d 2923 if (nlsk == NULL)
1da177e4 2924 return -ENOMEM;
d79d792e 2925 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
a6483b79 2926 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 2927 return 0;
2928}
2929
d79d792e 2930static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 2931{
d79d792e
EB		 2932 struct net *net;
2933 list_for_each_entry(net, net_exit_list, exit_list)
2934 rcu_assign_pointer(net->xfrm.nlsk, NULL);
2935 synchronize_net();
2936 list_for_each_entry(net, net_exit_list, exit_list)
2937 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 2938}
2939
a6483b79 2940static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 2941 .init = xfrm_user_net_init,
2942 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 2943};
2944
2945static int __init xfrm_user_init(void)
2946{
2947 int rv;
2948
2949 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2950
2951 rv = register_pernet_subsys(&xfrm_user_net_ops);
2952 if (rv < 0)
2953 return rv;
2954 rv = xfrm_register_km(&netlink_mgr);
2955 if (rv < 0)
2956 unregister_pernet_subsys(&xfrm_user_net_ops);
2957 return rv;
2958}
2959
2960static void __exit xfrm_user_exit(void)
2961{
2962 xfrm_unregister_km(&netlink_mgr);
2963 unregister_pernet_subsys(&xfrm_user_net_ops);
2964}
2965
1da177e4
LT		 2966module_init(xfrm_user_init);
2967module_exit(xfrm_user_exit);
2968MODULE_LICENSE("GPL");
4fdb3bb7 2969MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 2970
Linux 6.x block layer and io_uring tree(s)