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Merge branch 'vhost-net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mst...
[mirror_ubuntu-hirsute-kernel.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
fa6dd8a2 29#include <net/ah.h>
1da177e4 30#include <asm/uaccess.h>
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
130 if (p->replay_window != 0)
131 return -EINVAL;
132
133 return 0;
134}
df71837d 135
1da177e4 136static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 137 struct nlattr **attrs)
1da177e4
LT		 138{
139 int err;
140
141 err = -EINVAL;
142 switch (p->family) {
143 case AF_INET:
144 break;
145
146 case AF_INET6:
147#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
148 break;
149#else
150 err = -EAFNOSUPPORT;
151 goto out;
152#endif
153
154 default:
155 goto out;
3ff50b79 156 }
1da177e4
LT		 157
158 err = -EINVAL;
159 switch (p->id.proto) {
160 case IPPROTO_AH:
4447bb33
MW		 161 if ((!attrs[XFRMA_ALG_AUTH] &&
162 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 163 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 164 attrs[XFRMA_ALG_CRYPT] ||
35d2856b
MW		 165 attrs[XFRMA_ALG_COMP] ||
166 attrs[XFRMA_TFCPAD])
1da177e4
LT		 167 goto out;
168 break;
169
170 case IPPROTO_ESP:
1a6509d9
HX		 171 if (attrs[XFRMA_ALG_COMP])
172 goto out;
173 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 174 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 175 !attrs[XFRMA_ALG_CRYPT] &&
176 !attrs[XFRMA_ALG_AEAD])
177 goto out;
178 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 179 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 180 attrs[XFRMA_ALG_CRYPT]) &&
181 attrs[XFRMA_ALG_AEAD])
1da177e4 182 goto out;
35d2856b
MW		 183 if (attrs[XFRMA_TFCPAD] &&
184 p->mode != XFRM_MODE_TUNNEL)
185 goto out;
1da177e4
LT		 186 break;
187
188 case IPPROTO_COMP:
35a7aa08 189 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 190 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 191 attrs[XFRMA_ALG_AUTH] ||
4447bb33 192 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b
MW		 193 attrs[XFRMA_ALG_CRYPT] ||
194 attrs[XFRMA_TFCPAD])
1da177e4
LT		 195 goto out;
196 break;
197
e23c7194
MN		 198#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
199 case IPPROTO_DSTOPTS:
200 case IPPROTO_ROUTING:
35a7aa08
TG		 201 if (attrs[XFRMA_ALG_COMP] ||
202 attrs[XFRMA_ALG_AUTH] ||
4447bb33 203 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 204 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 205 attrs[XFRMA_ALG_CRYPT] ||
206 attrs[XFRMA_ENCAP] ||
207 attrs[XFRMA_SEC_CTX] ||
35d2856b 208 attrs[XFRMA_TFCPAD] ||
35a7aa08 209 !attrs[XFRMA_COADDR])
e23c7194
MN		 210 goto out;
211 break;
212#endif
213
1da177e4
LT		 214 default:
215 goto out;
3ff50b79 216 }
1da177e4 217
1a6509d9
HX		 218 if ((err = verify_aead(attrs)))
219 goto out;
4447bb33
MW		 220 if ((err = verify_auth_trunc(attrs)))
221 goto out;
35a7aa08 222 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 223 goto out;
35a7aa08 224 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 225 goto out;
35a7aa08 226 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 227 goto out;
35a7aa08 228 if ((err = verify_sec_ctx_len(attrs)))
df71837d 229 goto out;
d8647b79
SK		 230 if ((err = verify_replay(p, attrs)))
231 goto out;
1da177e4
LT		 232
233 err = -EINVAL;
234 switch (p->mode) {
7e49e6de
MN		 235 case XFRM_MODE_TRANSPORT:
236 case XFRM_MODE_TUNNEL:
060f02a3 237 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 238 case XFRM_MODE_BEET:
1da177e4
LT		 239 break;
240
241 default:
242 goto out;
3ff50b79 243 }
1da177e4
LT		 244
245 err = 0;
246
247out:
248 return err;
249}
250
251static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 252 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 253 struct nlattr *rta)
1da177e4 254{
1da177e4
LT		 255 struct xfrm_algo *p, *ualg;
256 struct xfrm_algo_desc *algo;
257
258 if (!rta)
259 return 0;
260
5424f32e 261 ualg = nla_data(rta);
1da177e4
LT		 262
263 algo = get_byname(ualg->alg_name, 1);
264 if (!algo)
265 return -ENOSYS;
266 *props = algo->desc.sadb_alg_id;
267
0f99be0d 268 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 269 if (!p)
270 return -ENOMEM;
271
04ff1260 272 strcpy(p->alg_name, algo->name);
1da177e4
LT		 273 *algpp = p;
274 return 0;
275}
276
4447bb33
MW		 277static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
278 struct nlattr *rta)
279{
280 struct xfrm_algo *ualg;
281 struct xfrm_algo_auth *p;
282 struct xfrm_algo_desc *algo;
283
284 if (!rta)
285 return 0;
286
287 ualg = nla_data(rta);
288
289 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
290 if (!algo)
291 return -ENOSYS;
292 *props = algo->desc.sadb_alg_id;
293
294 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
295 if (!p)
296 return -ENOMEM;
297
298 strcpy(p->alg_name, algo->name);
299 p->alg_key_len = ualg->alg_key_len;
300 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
301 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
302
303 *algpp = p;
304 return 0;
305}
306
307static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
308 struct nlattr *rta)
309{
310 struct xfrm_algo_auth *p, *ualg;
311 struct xfrm_algo_desc *algo;
312
313 if (!rta)
314 return 0;
315
316 ualg = nla_data(rta);
317
318 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
319 if (!algo)
320 return -ENOSYS;
fa6dd8a2
ND		 321 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
322 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 323 return -EINVAL;
324 *props = algo->desc.sadb_alg_id;
325
326 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
327 if (!p)
328 return -ENOMEM;
329
330 strcpy(p->alg_name, algo->name);
331 if (!p->alg_trunc_len)
332 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
333
334 *algpp = p;
335 return 0;
336}
337
1a6509d9
HX		 338static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
339 struct nlattr *rta)
340{
341 struct xfrm_algo_aead *p, *ualg;
342 struct xfrm_algo_desc *algo;
343
344 if (!rta)
345 return 0;
346
347 ualg = nla_data(rta);
348
349 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
350 if (!algo)
351 return -ENOSYS;
352 *props = algo->desc.sadb_alg_id;
353
354 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
355 if (!p)
356 return -ENOMEM;
357
358 strcpy(p->alg_name, algo->name);
359 *algpp = p;
360 return 0;
361}
362
d8647b79
SK		 363static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
364 struct xfrm_replay_state_esn **preplay_esn,
365 struct nlattr *rta)
366{
367 struct xfrm_replay_state_esn *p, *pp, *up;
368
369 if (!rta)
370 return 0;
371
372 up = nla_data(rta);
373
374 p = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL);
375 if (!p)
376 return -ENOMEM;
377
378 pp = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL);
379 if (!pp) {
380 kfree(p);
381 return -ENOMEM;
382 }
383
384 *replay_esn = p;
385 *preplay_esn = pp;
386
387 return 0;
388}
389
661697f7 390static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 391{
df71837d
TJ		 392 int len = 0;
393
394 if (xfrm_ctx) {
395 len += sizeof(struct xfrm_user_sec_ctx);
396 len += xfrm_ctx->ctx_len;
397 }
398 return len;
399}
400
1da177e4
LT		 401static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
402{
403 memcpy(&x->id, &p->id, sizeof(x->id));
404 memcpy(&x->sel, &p->sel, sizeof(x->sel));
405 memcpy(&x->lft, &p->lft, sizeof(x->lft));
406 x->props.mode = p->mode;
407 x->props.replay_window = p->replay_window;
408 x->props.reqid = p->reqid;
409 x->props.family = p->family;
54489c14 410 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 411 x->props.flags = p->flags;
196b0036 412
ccf9b3b8 413 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 414 x->sel.family = p->family;
1da177e4
LT		 415}
416
d51d081d
JHS		 417/*
418 * someday when pfkey also has support, we could have the code
419 * somehow made shareable and move it to xfrm_state.c - JHS
420 *
421*/
5424f32e 422static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
d51d081d 423{
5424f32e 424 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 425 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e
TG		 426 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
427 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
428 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 429
d8647b79
SK		 430 if (re) {
431 struct xfrm_replay_state_esn *replay_esn;
432 replay_esn = nla_data(re);
433 memcpy(x->replay_esn, replay_esn,
434 xfrm_replay_state_esn_len(replay_esn));
435 memcpy(x->preplay_esn, replay_esn,
436 xfrm_replay_state_esn_len(replay_esn));
437 }
438
d51d081d
JHS		 439 if (rp) {
440 struct xfrm_replay_state *replay;
5424f32e 441 replay = nla_data(rp);
d51d081d
JHS		 442 memcpy(&x->replay, replay, sizeof(*replay));
443 memcpy(&x->preplay, replay, sizeof(*replay));
444 }
445
446 if (lt) {
447 struct xfrm_lifetime_cur *ltime;
5424f32e 448 ltime = nla_data(lt);
d51d081d
JHS		 449 x->curlft.bytes = ltime->bytes;
450 x->curlft.packets = ltime->packets;
451 x->curlft.add_time = ltime->add_time;
452 x->curlft.use_time = ltime->use_time;
453 }
454
cf5cb79f 455 if (et)
5424f32e 456 x->replay_maxage = nla_get_u32(et);
d51d081d 457
cf5cb79f 458 if (rt)
5424f32e 459 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 460}
461
fc34acd3
AD		 462static struct xfrm_state *xfrm_state_construct(struct net *net,
463 struct xfrm_usersa_info *p,
5424f32e 464 struct nlattr **attrs,
1da177e4
LT		 465 int *errp)
466{
fc34acd3 467 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 468 int err = -ENOMEM;
469
470 if (!x)
471 goto error_no_put;
472
473 copy_from_user_state(x, p);
474
1a6509d9
HX		 475 if ((err = attach_aead(&x->aead, &x->props.ealgo,
476 attrs[XFRMA_ALG_AEAD])))
477 goto error;
4447bb33
MW		 478 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
479 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 480 goto error;
4447bb33
MW		 481 if (!x->props.aalgo) {
482 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
483 attrs[XFRMA_ALG_AUTH])))
484 goto error;
485 }
1da177e4
LT		 486 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
487 xfrm_ealg_get_byname,
35a7aa08 488 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 489 goto error;
490 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
491 xfrm_calg_get_byname,
35a7aa08 492 attrs[XFRMA_ALG_COMP])))
1da177e4 493 goto error;
fd21150a
TG		 494
495 if (attrs[XFRMA_ENCAP]) {
496 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
497 sizeof(*x->encap), GFP_KERNEL);
498 if (x->encap == NULL)
499 goto error;
500 }
501
35d2856b
MW		 502 if (attrs[XFRMA_TFCPAD])
503 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
504
fd21150a
TG		 505 if (attrs[XFRMA_COADDR]) {
506 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
507 sizeof(*x->coaddr), GFP_KERNEL);
508 if (x->coaddr == NULL)
509 goto error;
510 }
511
6f26b61e
JHS		 512 xfrm_mark_get(attrs, &x->mark);
513
72cb6962 514 err = xfrm_init_state(x);
1da177e4
LT		 515 if (err)
516 goto error;
517
fd21150a
TG		 518 if (attrs[XFRMA_SEC_CTX] &&
519 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 520 goto error;
521
d8647b79
SK		 522 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
523 attrs[XFRMA_REPLAY_ESN_VAL])))
524 goto error;
525
1da177e4 526 x->km.seq = p->seq;
b27aeadb 527 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 528 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 529 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 530
9fdc4883
SK		 531 if ((err = xfrm_init_replay(x)))
532 goto error;
d51d081d 533
9fdc4883 534 /* override default values from above */
5424f32e 535 xfrm_update_ae_params(x, attrs);
1da177e4
LT		 536
537 return x;
538
539error:
540 x->km.state = XFRM_STATE_DEAD;
541 xfrm_state_put(x);
542error_no_put:
543 *errp = err;
544 return NULL;
545}
546
22e70050 547static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 548 struct nlattr **attrs)
1da177e4 549{
fc34acd3 550 struct net *net = sock_net(skb->sk);
7b67c857 551 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 552 struct xfrm_state *x;
553 int err;
26b15dad 554 struct km_event c;
c53fa1ed
PM		 555 uid_t loginuid = audit_get_loginuid(current);
556 u32 sessionid = audit_get_sessionid(current);
557 u32 sid;
1da177e4 558
35a7aa08 559 err = verify_newsa_info(p, attrs);
1da177e4
LT		 560 if (err)
561 return err;
562
fc34acd3 563 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 564 if (!x)
565 return err;
566
26b15dad 567 xfrm_state_hold(x);
1da177e4
LT		 568 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
569 err = xfrm_state_add(x);
570 else
571 err = xfrm_state_update(x);
572
c53fa1ed 573 security_task_getsecid(current, &sid);
2532386f 574 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 575
1da177e4
LT		 576 if (err < 0) {
577 x->km.state = XFRM_STATE_DEAD;
21380b81 578 __xfrm_state_put(x);
7d6dfe1f 579 goto out;
1da177e4
LT		 580 }
581
26b15dad
JHS		 582 c.seq = nlh->nlmsg_seq;
583 c.pid = nlh->nlmsg_pid;
f60f6b8f 584 c.event = nlh->nlmsg_type;
26b15dad
JHS		 585
586 km_state_notify(x, &c);
7d6dfe1f 587out:
26b15dad 588 xfrm_state_put(x);
1da177e4
LT		 589 return err;
590}
591
fc34acd3
AD		 592static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
593 struct xfrm_usersa_id *p,
5424f32e 594 struct nlattr **attrs,
eb2971b6
MN		 595 int *errp)
596{
597 struct xfrm_state *x = NULL;
6f26b61e 598 struct xfrm_mark m;
eb2971b6 599 int err;
6f26b61e 600 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 601
602 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
603 err = -ESRCH;
6f26b61e 604 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 605 } else {
606 xfrm_address_t *saddr = NULL;
607
35a7aa08 608 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 609 if (!saddr) {
610 err = -EINVAL;
611 goto out;
612 }
613
9abbffee 614 err = -ESRCH;
6f26b61e
JHS		 615 x = xfrm_state_lookup_byaddr(net, mark,
616 &p->daddr, saddr,
221df1ed 617 p->proto, p->family);
eb2971b6
MN		 618 }
619
620 out:
621 if (!x && errp)
622 *errp = err;
623 return x;
624}
625
22e70050 626static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 627 struct nlattr **attrs)
1da177e4 628{
fc34acd3 629 struct net *net = sock_net(skb->sk);
1da177e4 630 struct xfrm_state *x;
eb2971b6 631 int err = -ESRCH;
26b15dad 632 struct km_event c;
7b67c857 633 struct xfrm_usersa_id *p = nlmsg_data(nlh);
c53fa1ed
PM		 634 uid_t loginuid = audit_get_loginuid(current);
635 u32 sessionid = audit_get_sessionid(current);
636 u32 sid;
1da177e4 637
fc34acd3 638 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 639 if (x == NULL)
eb2971b6 640 return err;
1da177e4 641
6f68dc37 642 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 643 goto out;
644
1da177e4 645 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 646 err = -EPERM;
647 goto out;
1da177e4
LT		 648 }
649
26b15dad 650 err = xfrm_state_delete(x);
161a09e7 651
c8c05a8e
CZ		 652 if (err < 0)
653 goto out;
26b15dad
JHS		 654
655 c.seq = nlh->nlmsg_seq;
656 c.pid = nlh->nlmsg_pid;
f60f6b8f 657 c.event = nlh->nlmsg_type;
26b15dad 658 km_state_notify(x, &c);
1da177e4 659
c8c05a8e 660out:
c53fa1ed 661 security_task_getsecid(current, &sid);
2532386f 662 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
c8c05a8e 663 xfrm_state_put(x);
26b15dad 664 return err;
1da177e4
LT		 665}
666
667static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
668{
669 memcpy(&p->id, &x->id, sizeof(p->id));
670 memcpy(&p->sel, &x->sel, sizeof(p->sel));
671 memcpy(&p->lft, &x->lft, sizeof(p->lft));
672 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
673 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 674 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 675 p->mode = x->props.mode;
676 p->replay_window = x->props.replay_window;
677 p->reqid = x->props.reqid;
678 p->family = x->props.family;
679 p->flags = x->props.flags;
680 p->seq = x->km.seq;
681}
682
683struct xfrm_dump_info {
684 struct sk_buff *in_skb;
685 struct sk_buff *out_skb;
686 u32 nlmsg_seq;
687 u16 nlmsg_flags;
1da177e4
LT		 688};
689
c0144bea
TG		 690static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
691{
c0144bea
TG		 692 struct xfrm_user_sec_ctx *uctx;
693 struct nlattr *attr;
68325d3b 694 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 695
696 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
697 if (attr == NULL)
698 return -EMSGSIZE;
699
700 uctx = nla_data(attr);
701 uctx->exttype = XFRMA_SEC_CTX;
702 uctx->len = ctx_size;
703 uctx->ctx_doi = s->ctx_doi;
704 uctx->ctx_alg = s->ctx_alg;
705 uctx->ctx_len = s->ctx_len;
706 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
707
708 return 0;
709}
710
4447bb33
MW		 711static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
712{
713 struct xfrm_algo *algo;
714 struct nlattr *nla;
715
716 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
717 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
718 if (!nla)
719 return -EMSGSIZE;
720
721 algo = nla_data(nla);
722 strcpy(algo->alg_name, auth->alg_name);
723 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
724 algo->alg_key_len = auth->alg_key_len;
725
726 return 0;
727}
728
68325d3b
HX		 729/* Don't change this without updating xfrm_sa_len! */
730static int copy_to_user_state_extra(struct xfrm_state *x,
731 struct xfrm_usersa_info *p,
732 struct sk_buff *skb)
1da177e4 733{
1da177e4
LT		 734 copy_to_user_state(x, p);
735
050f009e
HX		 736 if (x->coaddr)
737 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
738
739 if (x->lastused)
740 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
050f009e 741
1a6509d9
HX		 742 if (x->aead)
743 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
4447bb33
MW		 744 if (x->aalg) {
745 if (copy_to_user_auth(x->aalg, skb))
746 goto nla_put_failure;
747
748 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
749 xfrm_alg_auth_len(x->aalg), x->aalg);
750 }
1da177e4 751 if (x->ealg)
0f99be0d 752 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
1da177e4 753 if (x->calg)
c0144bea 754 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1da177e4
LT		 755
756 if (x->encap)
c0144bea 757 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1da177e4 758
35d2856b
MW		 759 if (x->tfcpad)
760 NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad);
761
6f26b61e
JHS		 762 if (xfrm_mark_put(skb, &x->mark))
763 goto nla_put_failure;
764
d8647b79
SK		 765 if (x->replay_esn)
766 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
767 xfrm_replay_state_esn_len(x->replay_esn), x->replay_esn);
768
c0144bea
TG		 769 if (x->security && copy_sec_ctx(x->security, skb) < 0)
770 goto nla_put_failure;
060f02a3 771
68325d3b
HX		 772 return 0;
773
774nla_put_failure:
775 return -EMSGSIZE;
776}
777
778static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
779{
780 struct xfrm_dump_info *sp = ptr;
781 struct sk_buff *in_skb = sp->in_skb;
782 struct sk_buff *skb = sp->out_skb;
783 struct xfrm_usersa_info *p;
784 struct nlmsghdr *nlh;
785 int err;
786
68325d3b
HX		 787 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
788 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
789 if (nlh == NULL)
790 return -EMSGSIZE;
791
792 p = nlmsg_data(nlh);
793
794 err = copy_to_user_state_extra(x, p, skb);
795 if (err)
796 goto nla_put_failure;
797
9825069d 798 nlmsg_end(skb, nlh);
1da177e4
LT		 799 return 0;
800
c0144bea 801nla_put_failure:
9825069d 802 nlmsg_cancel(skb, nlh);
68325d3b 803 return err;
1da177e4
LT		 804}
805
4c563f76
TT		 806static int xfrm_dump_sa_done(struct netlink_callback *cb)
807{
808 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
809 xfrm_state_walk_done(walk);
810 return 0;
811}
812
1da177e4
LT		 813static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
814{
fc34acd3 815 struct net *net = sock_net(skb->sk);
4c563f76 816 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 817 struct xfrm_dump_info info;
818
4c563f76
TT		 819 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
820 sizeof(cb->args) - sizeof(cb->args[0]));
821
1da177e4
LT		 822 info.in_skb = cb->skb;
823 info.out_skb = skb;
824 info.nlmsg_seq = cb->nlh->nlmsg_seq;
825 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 826
827 if (!cb->args[0]) {
828 cb->args[0] = 1;
829 xfrm_state_walk_init(walk, 0);
830 }
831
fc34acd3 832 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 833
834 return skb->len;
835}
836
837static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
838 struct xfrm_state *x, u32 seq)
839{
840 struct xfrm_dump_info info;
841 struct sk_buff *skb;
842
7deb2264 843 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 844 if (!skb)
845 return ERR_PTR(-ENOMEM);
846
1da177e4
LT		 847 info.in_skb = in_skb;
848 info.out_skb = skb;
849 info.nlmsg_seq = seq;
850 info.nlmsg_flags = 0;
1da177e4
LT		 851
852 if (dump_one_state(x, 0, &info)) {
853 kfree_skb(skb);
854 return NULL;
855 }
856
857 return skb;
858}
859
7deb2264
TG		 860static inline size_t xfrm_spdinfo_msgsize(void)
861{
862 return NLMSG_ALIGN(4)
863 + nla_total_size(sizeof(struct xfrmu_spdinfo))
864 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
865}
866
e071041b
AD		 867static int build_spdinfo(struct sk_buff *skb, struct net *net,
868 u32 pid, u32 seq, u32 flags)
ecfd6b18 869{
5a6d3416
JHS		 870 struct xfrmk_spdinfo si;
871 struct xfrmu_spdinfo spc;
872 struct xfrmu_spdhinfo sph;
ecfd6b18
JHS		 873 struct nlmsghdr *nlh;
874 u32 *f;
875
876 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
877 if (nlh == NULL) /* shouldnt really happen ... */
878 return -EMSGSIZE;
879
880 f = nlmsg_data(nlh);
881 *f = flags;
e071041b 882 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 883 spc.incnt = si.incnt;
884 spc.outcnt = si.outcnt;
885 spc.fwdcnt = si.fwdcnt;
886 spc.inscnt = si.inscnt;
887 spc.outscnt = si.outscnt;
888 spc.fwdscnt = si.fwdscnt;
889 sph.spdhcnt = si.spdhcnt;
890 sph.spdhmcnt = si.spdhmcnt;
891
892 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
893 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
ecfd6b18
JHS		 894
895 return nlmsg_end(skb, nlh);
896
897nla_put_failure:
898 nlmsg_cancel(skb, nlh);
899 return -EMSGSIZE;
900}
901
902static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 903 struct nlattr **attrs)
ecfd6b18 904{
a6483b79 905 struct net *net = sock_net(skb->sk);
ecfd6b18 906 struct sk_buff *r_skb;
7b67c857 907 u32 *flags = nlmsg_data(nlh);
ecfd6b18
JHS		 908 u32 spid = NETLINK_CB(skb).pid;
909 u32 seq = nlh->nlmsg_seq;
ecfd6b18 910
7deb2264 911 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 912 if (r_skb == NULL)
913 return -ENOMEM;
914
e071041b 915 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
ecfd6b18
JHS		 916 BUG();
917
a6483b79 918 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
ecfd6b18
JHS		 919}
920
7deb2264
TG		 921static inline size_t xfrm_sadinfo_msgsize(void)
922{
923 return NLMSG_ALIGN(4)
924 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
925 + nla_total_size(4); /* XFRMA_SAD_CNT */
926}
927
e071041b
AD		 928static int build_sadinfo(struct sk_buff *skb, struct net *net,
929 u32 pid, u32 seq, u32 flags)
28d8909b 930{
af11e316
JHS		 931 struct xfrmk_sadinfo si;
932 struct xfrmu_sadhinfo sh;
28d8909b
JHS		 933 struct nlmsghdr *nlh;
934 u32 *f;
935
936 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
937 if (nlh == NULL) /* shouldnt really happen ... */
938 return -EMSGSIZE;
939
940 f = nlmsg_data(nlh);
941 *f = flags;
e071041b 942 xfrm_sad_getinfo(net, &si);
28d8909b 943
af11e316
JHS		 944 sh.sadhmcnt = si.sadhmcnt;
945 sh.sadhcnt = si.sadhcnt;
946
947 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
948 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
28d8909b
JHS		 949
950 return nlmsg_end(skb, nlh);
951
952nla_put_failure:
953 nlmsg_cancel(skb, nlh);
954 return -EMSGSIZE;
955}
956
957static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 958 struct nlattr **attrs)
28d8909b 959{
a6483b79 960 struct net *net = sock_net(skb->sk);
28d8909b 961 struct sk_buff *r_skb;
7b67c857 962 u32 *flags = nlmsg_data(nlh);
28d8909b
JHS		 963 u32 spid = NETLINK_CB(skb).pid;
964 u32 seq = nlh->nlmsg_seq;
28d8909b 965
7deb2264 966 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 967 if (r_skb == NULL)
968 return -ENOMEM;
969
e071041b 970 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
28d8909b
JHS		 971 BUG();
972
a6483b79 973 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
28d8909b
JHS		 974}
975
22e70050 976static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 977 struct nlattr **attrs)
1da177e4 978{
fc34acd3 979 struct net *net = sock_net(skb->sk);
7b67c857 980 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 981 struct xfrm_state *x;
982 struct sk_buff *resp_skb;
eb2971b6 983 int err = -ESRCH;
1da177e4 984
fc34acd3 985 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 986 if (x == NULL)
987 goto out_noput;
988
989 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
990 if (IS_ERR(resp_skb)) {
991 err = PTR_ERR(resp_skb);
992 } else {
a6483b79 993 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 994 }
995 xfrm_state_put(x);
996out_noput:
997 return err;
998}
999
1000static int verify_userspi_info(struct xfrm_userspi_info *p)
1001{
1002 switch (p->info.id.proto) {
1003 case IPPROTO_AH:
1004 case IPPROTO_ESP:
1005 break;
1006
1007 case IPPROTO_COMP:
1008 /* IPCOMP spi is 16-bits. */
1009 if (p->max >= 0x10000)
1010 return -EINVAL;
1011 break;
1012
1013 default:
1014 return -EINVAL;
3ff50b79 1015 }
1da177e4
LT		 1016
1017 if (p->min > p->max)
1018 return -EINVAL;
1019
1020 return 0;
1021}
1022
22e70050 1023static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1024 struct nlattr **attrs)
1da177e4 1025{
fc34acd3 1026 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1027 struct xfrm_state *x;
1028 struct xfrm_userspi_info *p;
1029 struct sk_buff *resp_skb;
1030 xfrm_address_t *daddr;
1031 int family;
1032 int err;
6f26b61e
JHS		 1033 u32 mark;
1034 struct xfrm_mark m;
1da177e4 1035
7b67c857 1036 p = nlmsg_data(nlh);
1da177e4
LT		 1037 err = verify_userspi_info(p);
1038 if (err)
1039 goto out_noput;
1040
1041 family = p->info.family;
1042 daddr = &p->info.id.daddr;
1043
1044 x = NULL;
6f26b61e
JHS		 1045
1046 mark = xfrm_mark_get(attrs, &m);
1da177e4 1047 if (p->info.seq) {
6f26b61e 1048 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1da177e4
LT		 1049 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
1050 xfrm_state_put(x);
1051 x = NULL;
1052 }
1053 }
1054
1055 if (!x)
6f26b61e 1056 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1057 p->info.id.proto, daddr,
1058 &p->info.saddr, 1,
1059 family);
1060 err = -ENOENT;
1061 if (x == NULL)
1062 goto out_noput;
1063
658b219e
HX		 1064 err = xfrm_alloc_spi(x, p->min, p->max);
1065 if (err)
1066 goto out;
1da177e4 1067
658b219e 1068 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1069 if (IS_ERR(resp_skb)) {
1070 err = PTR_ERR(resp_skb);
1071 goto out;
1072 }
1073
a6483b79 1074 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 1075
1076out:
1077 xfrm_state_put(x);
1078out_noput:
1079 return err;
1080}
1081
b798a9ed 1082static int verify_policy_dir(u8 dir)
1da177e4
LT		 1083{
1084 switch (dir) {
1085 case XFRM_POLICY_IN:
1086 case XFRM_POLICY_OUT:
1087 case XFRM_POLICY_FWD:
1088 break;
1089
1090 default:
1091 return -EINVAL;
3ff50b79 1092 }
1da177e4
LT		 1093
1094 return 0;
1095}
1096
b798a9ed 1097static int verify_policy_type(u8 type)
f7b6983f
MN		 1098{
1099 switch (type) {
1100 case XFRM_POLICY_TYPE_MAIN:
1101#ifdef CONFIG_XFRM_SUB_POLICY
1102 case XFRM_POLICY_TYPE_SUB:
1103#endif
1104 break;
1105
1106 default:
1107 return -EINVAL;
3ff50b79 1108 }
f7b6983f
MN		 1109
1110 return 0;
1111}
1112
1da177e4
LT		 1113static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1114{
1115 switch (p->share) {
1116 case XFRM_SHARE_ANY:
1117 case XFRM_SHARE_SESSION:
1118 case XFRM_SHARE_USER:
1119 case XFRM_SHARE_UNIQUE:
1120 break;
1121
1122 default:
1123 return -EINVAL;
3ff50b79 1124 }
1da177e4
LT		 1125
1126 switch (p->action) {
1127 case XFRM_POLICY_ALLOW:
1128 case XFRM_POLICY_BLOCK:
1129 break;
1130
1131 default:
1132 return -EINVAL;
3ff50b79 1133 }
1da177e4
LT		 1134
1135 switch (p->sel.family) {
1136 case AF_INET:
1137 break;
1138
1139 case AF_INET6:
1140#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1141 break;
1142#else
1143 return -EAFNOSUPPORT;
1144#endif
1145
1146 default:
1147 return -EINVAL;
3ff50b79 1148 }
1da177e4
LT		 1149
1150 return verify_policy_dir(p->dir);
1151}
1152
5424f32e 1153static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1154{
5424f32e 1155 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1156 struct xfrm_user_sec_ctx *uctx;
1157
1158 if (!rt)
1159 return 0;
1160
5424f32e 1161 uctx = nla_data(rt);
03e1ad7b 1162 return security_xfrm_policy_alloc(&pol->security, uctx);
df71837d
TJ		 1163}
1164
1da177e4
LT		 1165static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1166 int nr)
1167{
1168 int i;
1169
1170 xp->xfrm_nr = nr;
1171 for (i = 0; i < nr; i++, ut++) {
1172 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1173
1174 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1175 memcpy(&t->saddr, &ut->saddr,
1176 sizeof(xfrm_address_t));
1177 t->reqid = ut->reqid;
1178 t->mode = ut->mode;
1179 t->share = ut->share;
1180 t->optional = ut->optional;
1181 t->aalgos = ut->aalgos;
1182 t->ealgos = ut->ealgos;
1183 t->calgos = ut->calgos;
c5d18e98
HX		 1184 /* If all masks are ~0, then we allow all algorithms. */
1185 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1186 t->encap_family = ut->family;
1da177e4
LT		 1187 }
1188}
1189
b4ad86bf
DM		 1190static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1191{
1192 int i;
1193
1194 if (nr > XFRM_MAX_DEPTH)
1195 return -EINVAL;
1196
1197 for (i = 0; i < nr; i++) {
1198 /* We never validated the ut->family value, so many
1199 * applications simply leave it at zero. The check was
1200 * never made and ut->family was ignored because all
1201 * templates could be assumed to have the same family as
1202 * the policy itself. Now that we will have ipv4-in-ipv6
1203 * and ipv6-in-ipv4 tunnels, this is no longer true.
1204 */
1205 if (!ut[i].family)
1206 ut[i].family = family;
1207
1208 switch (ut[i].family) {
1209 case AF_INET:
1210 break;
1211#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1212 case AF_INET6:
1213 break;
1214#endif
1215 default:
1216 return -EINVAL;
3ff50b79 1217 }
b4ad86bf
DM		 1218 }
1219
1220 return 0;
1221}
1222
5424f32e 1223static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1224{
5424f32e 1225 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1226
1227 if (!rt) {
1228 pol->xfrm_nr = 0;
1229 } else {
5424f32e
TG		 1230 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1231 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1232 int err;
1da177e4 1233
b4ad86bf
DM		 1234 err = validate_tmpl(nr, utmpl, pol->family);
1235 if (err)
1236 return err;
1da177e4 1237
5424f32e 1238 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1239 }
1240 return 0;
1241}
1242
5424f32e 1243static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1244{
5424f32e 1245 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1246 struct xfrm_userpolicy_type *upt;
b798a9ed 1247 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1248 int err;
1249
1250 if (rt) {
5424f32e 1251 upt = nla_data(rt);
f7b6983f
MN		 1252 type = upt->type;
1253 }
1254
1255 err = verify_policy_type(type);
1256 if (err)
1257 return err;
1258
1259 *tp = type;
1260 return 0;
1261}
1262
1da177e4
LT		 1263static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1264{
1265 xp->priority = p->priority;
1266 xp->index = p->index;
1267 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1268 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1269 xp->action = p->action;
1270 xp->flags = p->flags;
1271 xp->family = p->sel.family;
1272 /* XXX xp->share = p->share; */
1273}
1274
1275static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1276{
1277 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1278 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1279 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1280 p->priority = xp->priority;
1281 p->index = xp->index;
1282 p->sel.family = xp->family;
1283 p->dir = dir;
1284 p->action = xp->action;
1285 p->flags = xp->flags;
1286 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1287}
1288
fc34acd3 1289static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1290{
fc34acd3 1291 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1292 int err;
1293
1294 if (!xp) {
1295 *errp = -ENOMEM;
1296 return NULL;
1297 }
1298
1299 copy_from_user_policy(xp, p);
df71837d 1300
35a7aa08 1301 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1302 if (err)
1303 goto error;
1304
35a7aa08
TG		 1305 if (!(err = copy_from_user_tmpl(xp, attrs)))
1306 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1307 if (err)
1308 goto error;
1da177e4 1309
295fae56
JHS		 1310 xfrm_mark_get(attrs, &xp->mark);
1311
1da177e4 1312 return xp;
f7b6983f
MN		 1313 error:
1314 *errp = err;
12a169e7 1315 xp->walk.dead = 1;
64c31b3f 1316 xfrm_policy_destroy(xp);
f7b6983f 1317 return NULL;
1da177e4
LT		 1318}
1319
22e70050 1320static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1321 struct nlattr **attrs)
1da177e4 1322{
fc34acd3 1323 struct net *net = sock_net(skb->sk);
7b67c857 1324 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1325 struct xfrm_policy *xp;
26b15dad 1326 struct km_event c;
1da177e4
LT		 1327 int err;
1328 int excl;
c53fa1ed
PM		 1329 uid_t loginuid = audit_get_loginuid(current);
1330 u32 sessionid = audit_get_sessionid(current);
1331 u32 sid;
1da177e4
LT		 1332
1333 err = verify_newpolicy_info(p);
df71837d
TJ		 1334 if (err)
1335 return err;
35a7aa08 1336 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1337 if (err)
1338 return err;
1339
fc34acd3 1340 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1341 if (!xp)
1342 return err;
1343
26b15dad
JHS		 1344 /* shouldnt excl be based on nlh flags??
1345 * Aha! this is anti-netlink really i.e more pfkey derived
1346 * in netlink excl is a flag and you wouldnt need
1347 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1348 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1349 err = xfrm_policy_insert(p->dir, xp, excl);
c53fa1ed 1350 security_task_getsecid(current, &sid);
2532386f 1351 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 1352
1da177e4 1353 if (err) {
03e1ad7b 1354 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1355 kfree(xp);
1356 return err;
1357 }
1358
f60f6b8f 1359 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1360 c.seq = nlh->nlmsg_seq;
1361 c.pid = nlh->nlmsg_pid;
1362 km_policy_notify(xp, p->dir, &c);
1363
1da177e4
LT		 1364 xfrm_pol_put(xp);
1365
1366 return 0;
1367}
1368
1369static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1370{
1371 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1372 int i;
1373
1374 if (xp->xfrm_nr == 0)
1375 return 0;
1376
1377 for (i = 0; i < xp->xfrm_nr; i++) {
1378 struct xfrm_user_tmpl *up = &vec[i];
1379 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1380
1381 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1382 up->family = kp->encap_family;
1da177e4
LT		 1383 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1384 up->reqid = kp->reqid;
1385 up->mode = kp->mode;
1386 up->share = kp->share;
1387 up->optional = kp->optional;
1388 up->aalgos = kp->aalgos;
1389 up->ealgos = kp->ealgos;
1390 up->calgos = kp->calgos;
1391 }
df71837d 1392
c0144bea
TG		 1393 return nla_put(skb, XFRMA_TMPL,
1394 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1395}
1396
1397static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1398{
1399 if (x->security) {
1400 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1401 }
1402 return 0;
0d681623 1403}
df71837d 1404
0d681623
SH		 1405static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1406{
1407 if (xp->security) {
1408 return copy_sec_ctx(xp->security, skb);
1409 }
1410 return 0;
df71837d 1411}
cfbfd45a
TG		 1412static inline size_t userpolicy_type_attrsize(void)
1413{
1414#ifdef CONFIG_XFRM_SUB_POLICY
1415 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1416#else
1417 return 0;
1418#endif
1419}
df71837d 1420
f7b6983f 1421#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1422static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1423{
c0144bea
TG		 1424 struct xfrm_userpolicy_type upt = {
1425 .type = type,
1426 };
f7b6983f 1427
c0144bea 1428 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1429}
1430
1431#else
b798a9ed 1432static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1433{
1434 return 0;
1435}
1436#endif
1437
1da177e4
LT		 1438static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1439{
1440 struct xfrm_dump_info *sp = ptr;
1441 struct xfrm_userpolicy_info *p;
1442 struct sk_buff *in_skb = sp->in_skb;
1443 struct sk_buff *skb = sp->out_skb;
1444 struct nlmsghdr *nlh;
1da177e4 1445
79b8b7f4
TG		 1446 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1447 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1448 if (nlh == NULL)
1449 return -EMSGSIZE;
1da177e4 1450
7b67c857 1451 p = nlmsg_data(nlh);
1da177e4
LT		 1452 copy_to_user_policy(xp, p, dir);
1453 if (copy_to_user_tmpl(xp, skb) < 0)
1454 goto nlmsg_failure;
df71837d
TJ		 1455 if (copy_to_user_sec_ctx(xp, skb))
1456 goto nlmsg_failure;
1459bb36 1457 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 1458 goto nlmsg_failure;
295fae56
JHS		 1459 if (xfrm_mark_put(skb, &xp->mark))
1460 goto nla_put_failure;
1da177e4 1461
9825069d 1462 nlmsg_end(skb, nlh);
1da177e4
LT		 1463 return 0;
1464
295fae56 1465nla_put_failure:
1da177e4 1466nlmsg_failure:
9825069d
TG		 1467 nlmsg_cancel(skb, nlh);
1468 return -EMSGSIZE;
1da177e4
LT		 1469}
1470
4c563f76
TT		 1471static int xfrm_dump_policy_done(struct netlink_callback *cb)
1472{
1473 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1474
1475 xfrm_policy_walk_done(walk);
1476 return 0;
1477}
1478
1da177e4
LT		 1479static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1480{
fc34acd3 1481 struct net *net = sock_net(skb->sk);
4c563f76 1482 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1483 struct xfrm_dump_info info;
1484
4c563f76
TT		 1485 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1486 sizeof(cb->args) - sizeof(cb->args[0]));
1487
1da177e4
LT		 1488 info.in_skb = cb->skb;
1489 info.out_skb = skb;
1490 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1491 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1492
1493 if (!cb->args[0]) {
1494 cb->args[0] = 1;
1495 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1496 }
1497
fc34acd3 1498 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1499
1500 return skb->len;
1501}
1502
1503static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1504 struct xfrm_policy *xp,
1505 int dir, u32 seq)
1506{
1507 struct xfrm_dump_info info;
1508 struct sk_buff *skb;
1509
7deb2264 1510 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1511 if (!skb)
1512 return ERR_PTR(-ENOMEM);
1513
1da177e4
LT		 1514 info.in_skb = in_skb;
1515 info.out_skb = skb;
1516 info.nlmsg_seq = seq;
1517 info.nlmsg_flags = 0;
1da177e4
LT		 1518
1519 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1520 kfree_skb(skb);
1521 return NULL;
1522 }
1523
1524 return skb;
1525}
1526
22e70050 1527static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1528 struct nlattr **attrs)
1da177e4 1529{
fc34acd3 1530 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1531 struct xfrm_policy *xp;
1532 struct xfrm_userpolicy_id *p;
b798a9ed 1533 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1534 int err;
26b15dad 1535 struct km_event c;
1da177e4 1536 int delete;
295fae56
JHS		 1537 struct xfrm_mark m;
1538 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1539
7b67c857 1540 p = nlmsg_data(nlh);
1da177e4
LT		 1541 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1542
35a7aa08 1543 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1544 if (err)
1545 return err;
1546
1da177e4
LT		 1547 err = verify_policy_dir(p->dir);
1548 if (err)
1549 return err;
1550
1551 if (p->index)
295fae56 1552 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1553 else {
5424f32e 1554 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1555 struct xfrm_sec_ctx *ctx;
df71837d 1556
35a7aa08 1557 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1558 if (err)
1559 return err;
1560
2c8dd116 1561 ctx = NULL;
df71837d 1562 if (rt) {
5424f32e 1563 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1564
03e1ad7b
PM		 1565 err = security_xfrm_policy_alloc(&ctx, uctx);
1566 if (err)
df71837d 1567 return err;
2c8dd116 1568 }
295fae56 1569 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1570 ctx, delete, &err);
03e1ad7b 1571 security_xfrm_policy_free(ctx);
df71837d 1572 }
1da177e4
LT		 1573 if (xp == NULL)
1574 return -ENOENT;
1575
1576 if (!delete) {
1577 struct sk_buff *resp_skb;
1578
1579 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1580 if (IS_ERR(resp_skb)) {
1581 err = PTR_ERR(resp_skb);
1582 } else {
a6483b79 1583 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
082a1ad5 1584 NETLINK_CB(skb).pid);
1da177e4 1585 }
26b15dad 1586 } else {
c53fa1ed
PM		 1587 uid_t loginuid = audit_get_loginuid(current);
1588 u32 sessionid = audit_get_sessionid(current);
1589 u32 sid;
2532386f 1590
c53fa1ed 1591 security_task_getsecid(current, &sid);
2532386f
EP		 1592 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1593 sid);
13fcfbb0
DM		 1594
1595 if (err != 0)
c8c05a8e 1596 goto out;
13fcfbb0 1597
e7443892 1598 c.data.byid = p->index;
f60f6b8f 1599 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1600 c.seq = nlh->nlmsg_seq;
1601 c.pid = nlh->nlmsg_pid;
1602 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1603 }
1604
c8c05a8e 1605out:
ef41aaa0 1606 xfrm_pol_put(xp);
1da177e4
LT		 1607 return err;
1608}
1609
22e70050 1610static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1611 struct nlattr **attrs)
1da177e4 1612{
fc34acd3 1613 struct net *net = sock_net(skb->sk);
26b15dad 1614 struct km_event c;
7b67c857 1615 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1616 struct xfrm_audit audit_info;
4aa2e62c 1617 int err;
1da177e4 1618
c53fa1ed
PM		 1619 audit_info.loginuid = audit_get_loginuid(current);
1620 audit_info.sessionid = audit_get_sessionid(current);
1621 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1622 err = xfrm_state_flush(net, p->proto, &audit_info);
9e64cc95
JHS		 1623 if (err) {
1624 if (err == -ESRCH) /* empty table */
1625 return 0;
069c474e 1626 return err;
9e64cc95 1627 }
bf08867f 1628 c.data.proto = p->proto;
f60f6b8f 1629 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1630 c.seq = nlh->nlmsg_seq;
1631 c.pid = nlh->nlmsg_pid;
7067802e 1632 c.net = net;
26b15dad
JHS		 1633 km_state_notify(NULL, &c);
1634
1da177e4
LT		 1635 return 0;
1636}
1637
d8647b79 1638static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1639{
d8647b79
SK		 1640 size_t replay_size = x->replay_esn ?
1641 xfrm_replay_state_esn_len(x->replay_esn) :
1642 sizeof(struct xfrm_replay_state);
1643
7deb2264 1644 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1645 + nla_total_size(replay_size)
7deb2264 1646 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1647 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1648 + nla_total_size(4) /* XFRM_AE_RTHR */
1649 + nla_total_size(4); /* XFRM_AE_ETHR */
1650}
d51d081d 1651
214e005b 1652static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1653{
1654 struct xfrm_aevent_id *id;
1655 struct nlmsghdr *nlh;
d51d081d 1656
79b8b7f4
TG		 1657 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1658 if (nlh == NULL)
1659 return -EMSGSIZE;
d51d081d 1660
7b67c857 1661 id = nlmsg_data(nlh);
2b5f6dcc 1662 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1663 id->sa_id.spi = x->id.spi;
1664 id->sa_id.family = x->props.family;
1665 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1666 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1667 id->reqid = x->props.reqid;
d51d081d
JHS		 1668 id->flags = c->data.aevent;
1669
d8647b79
SK		 1670 if (x->replay_esn)
1671 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
1672 xfrm_replay_state_esn_len(x->replay_esn),
1673 x->replay_esn);
1674 else
1675 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1676
c0144bea 1677 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
d51d081d 1678
c0144bea
TG		 1679 if (id->flags & XFRM_AE_RTHR)
1680 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
d51d081d 1681
c0144bea
TG		 1682 if (id->flags & XFRM_AE_ETHR)
1683 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1684 x->replay_maxage * 10 / HZ);
d51d081d 1685
6f26b61e
JHS		 1686 if (xfrm_mark_put(skb, &x->mark))
1687 goto nla_put_failure;
1688
9825069d 1689 return nlmsg_end(skb, nlh);
d51d081d 1690
c0144bea 1691nla_put_failure:
9825069d
TG		 1692 nlmsg_cancel(skb, nlh);
1693 return -EMSGSIZE;
d51d081d
JHS		 1694}
1695
22e70050 1696static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1697 struct nlattr **attrs)
d51d081d 1698{
fc34acd3 1699 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1700 struct xfrm_state *x;
1701 struct sk_buff *r_skb;
1702 int err;
1703 struct km_event c;
6f26b61e
JHS		 1704 u32 mark;
1705 struct xfrm_mark m;
7b67c857 1706 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1707 struct xfrm_usersa_id *id = &p->sa_id;
1708
6f26b61e
JHS		 1709 mark = xfrm_mark_get(attrs, &m);
1710
1711 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1712 if (x == NULL)
d51d081d 1713 return -ESRCH;
d8647b79
SK		 1714
1715 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1716 if (r_skb == NULL) {
1717 xfrm_state_put(x);
1718 return -ENOMEM;
d51d081d
JHS		 1719 }
1720
1721 /*
1722 * XXX: is this lock really needed - none of the other
1723 * gets lock (the concern is things getting updated
1724 * while we are still reading) - jhs
1725 */
1726 spin_lock_bh(&x->lock);
1727 c.data.aevent = p->flags;
1728 c.seq = nlh->nlmsg_seq;
1729 c.pid = nlh->nlmsg_pid;
1730
1731 if (build_aevent(r_skb, x, &c) < 0)
1732 BUG();
a6483b79 1733 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
d51d081d
JHS		 1734 spin_unlock_bh(&x->lock);
1735 xfrm_state_put(x);
1736 return err;
1737}
1738
22e70050 1739static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1740 struct nlattr **attrs)
d51d081d 1741{
fc34acd3 1742 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1743 struct xfrm_state *x;
1744 struct km_event c;
1745 int err = - EINVAL;
6f26b61e
JHS		 1746 u32 mark = 0;
1747 struct xfrm_mark m;
7b67c857 1748 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1749 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1750 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1751 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d 1752
d8647b79 1753 if (!lt && !rp && !re)
d51d081d
JHS		 1754 return err;
1755
1756 /* pedantic mode - thou shalt sayeth replaceth */
1757 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1758 return err;
1759
6f26b61e
JHS		 1760 mark = xfrm_mark_get(attrs, &m);
1761
1762 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1763 if (x == NULL)
1764 return -ESRCH;
1765
1766 if (x->km.state != XFRM_STATE_VALID)
1767 goto out;
1768
1769 spin_lock_bh(&x->lock);
35a7aa08 1770 xfrm_update_ae_params(x, attrs);
d51d081d 1771 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1772
1773 c.event = nlh->nlmsg_type;
1774 c.seq = nlh->nlmsg_seq;
1775 c.pid = nlh->nlmsg_pid;
1776 c.data.aevent = XFRM_AE_CU;
1777 km_state_notify(x, &c);
1778 err = 0;
1779out:
1780 xfrm_state_put(x);
1781 return err;
1782}
1783
22e70050 1784static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1785 struct nlattr **attrs)
1da177e4 1786{
fc34acd3 1787 struct net *net = sock_net(skb->sk);
f7b6983f 1788 struct km_event c;
b798a9ed 1789 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1790 int err;
161a09e7 1791 struct xfrm_audit audit_info;
f7b6983f 1792
35a7aa08 1793 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1794 if (err)
1795 return err;
26b15dad 1796
c53fa1ed
PM		 1797 audit_info.loginuid = audit_get_loginuid(current);
1798 audit_info.sessionid = audit_get_sessionid(current);
1799 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1800 err = xfrm_policy_flush(net, type, &audit_info);
2f1eb65f
JHS		 1801 if (err) {
1802 if (err == -ESRCH) /* empty table */
1803 return 0;
069c474e 1804 return err;
2f1eb65f
JHS		 1805 }
1806
f7b6983f 1807 c.data.type = type;
f60f6b8f 1808 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1809 c.seq = nlh->nlmsg_seq;
1810 c.pid = nlh->nlmsg_pid;
7067802e 1811 c.net = net;
26b15dad 1812 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1813 return 0;
1814}
1815
22e70050 1816static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1817 struct nlattr **attrs)
6c5c8ca7 1818{
fc34acd3 1819 struct net *net = sock_net(skb->sk);
6c5c8ca7 1820 struct xfrm_policy *xp;
7b67c857 1821 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1822 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1823 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 1824 int err = -ENOENT;
295fae56
JHS		 1825 struct xfrm_mark m;
1826 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 1827
35a7aa08 1828 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1829 if (err)
1830 return err;
1831
c8bf4d04
TT		 1832 err = verify_policy_dir(p->dir);
1833 if (err)
1834 return err;
1835
6c5c8ca7 1836 if (p->index)
295fae56 1837 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 1838 else {
5424f32e 1839 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1840 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1841
35a7aa08 1842 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1843 if (err)
1844 return err;
1845
2c8dd116 1846 ctx = NULL;
6c5c8ca7 1847 if (rt) {
5424f32e 1848 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1849
03e1ad7b
PM		 1850 err = security_xfrm_policy_alloc(&ctx, uctx);
1851 if (err)
6c5c8ca7 1852 return err;
2c8dd116 1853 }
295fae56 1854 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 1855 &p->sel, ctx, 0, &err);
03e1ad7b 1856 security_xfrm_policy_free(ctx);
6c5c8ca7 1857 }
6c5c8ca7 1858 if (xp == NULL)
ef41aaa0 1859 return -ENOENT;
03e1ad7b 1860
ea2dea9d 1861 if (unlikely(xp->walk.dead))
6c5c8ca7 1862 goto out;
6c5c8ca7 1863
6c5c8ca7
JHS		 1864 err = 0;
1865 if (up->hard) {
c53fa1ed
PM		 1866 uid_t loginuid = audit_get_loginuid(current);
1867 u32 sessionid = audit_get_sessionid(current);
1868 u32 sid;
1869
1870 security_task_getsecid(current, &sid);
6c5c8ca7 1871 xfrm_policy_delete(xp, p->dir);
2532386f 1872 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
161a09e7 1873
6c5c8ca7
JHS		 1874 } else {
1875 // reset the timers here?
62db5cfd 1876 WARN(1, "Dont know what to do with soft policy expire\n");
6c5c8ca7
JHS		 1877 }
1878 km_policy_expired(xp, p->dir, up->hard, current->pid);
1879
1880out:
1881 xfrm_pol_put(xp);
1882 return err;
1883}
1884
22e70050 1885static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1886 struct nlattr **attrs)
53bc6b4d 1887{
fc34acd3 1888 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 1889 struct xfrm_state *x;
1890 int err;
7b67c857 1891 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 1892 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 1893 struct xfrm_mark m;
928497f0 1894 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 1895
6f26b61e 1896 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1897
3a765aa5 1898 err = -ENOENT;
53bc6b4d
JHS		 1899 if (x == NULL)
1900 return err;
1901
53bc6b4d 1902 spin_lock_bh(&x->lock);
3a765aa5 1903 err = -EINVAL;
53bc6b4d
JHS		 1904 if (x->km.state != XFRM_STATE_VALID)
1905 goto out;
1906 km_state_expired(x, ue->hard, current->pid);
1907
161a09e7 1908 if (ue->hard) {
c53fa1ed
PM		 1909 uid_t loginuid = audit_get_loginuid(current);
1910 u32 sessionid = audit_get_sessionid(current);
1911 u32 sid;
1912
1913 security_task_getsecid(current, &sid);
53bc6b4d 1914 __xfrm_state_delete(x);
2532386f 1915 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
161a09e7 1916 }
3a765aa5 1917 err = 0;
53bc6b4d
JHS		 1918out:
1919 spin_unlock_bh(&x->lock);
1920 xfrm_state_put(x);
1921 return err;
1922}
1923
22e70050 1924static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1925 struct nlattr **attrs)
980ebd25 1926{
fc34acd3 1927 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 1928 struct xfrm_policy *xp;
1929 struct xfrm_user_tmpl *ut;
1930 int i;
5424f32e 1931 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 1932 struct xfrm_mark mark;
980ebd25 1933
7b67c857 1934 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 1935 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 1936 int err = -ENOMEM;
1937
1938 if (!x)
d8eb9307 1939 goto nomem;
980ebd25 1940
6f26b61e
JHS		 1941 xfrm_mark_get(attrs, &mark);
1942
980ebd25 1943 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 1944 if (err)
1945 goto bad_policy;
980ebd25
JHS		 1946
1947 /* build an XP */
fc34acd3 1948 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 1949 if (!xp)
1950 goto free_state;
980ebd25
JHS		 1951
1952 memcpy(&x->id, &ua->id, sizeof(ua->id));
1953 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1954 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 1955 xp->mark.m = x->mark.m = mark.m;
1956 xp->mark.v = x->mark.v = mark.v;
5424f32e 1957 ut = nla_data(rt);
980ebd25
JHS		 1958 /* extract the templates and for each call km_key */
1959 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1960 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1961 memcpy(&x->id, &t->id, sizeof(x->id));
1962 x->props.mode = t->mode;
1963 x->props.reqid = t->reqid;
1964 x->props.family = ut->family;
1965 t->aalgos = ua->aalgos;
1966 t->ealgos = ua->ealgos;
1967 t->calgos = ua->calgos;
1968 err = km_query(x, t, xp);
1969
1970 }
1971
1972 kfree(x);
1973 kfree(xp);
1974
1975 return 0;
d8eb9307
IJ		 1976
1977bad_policy:
62db5cfd 1978 WARN(1, "BAD policy passed\n");
d8eb9307
IJ		 1979free_state:
1980 kfree(x);
1981nomem:
1982 return err;
980ebd25
JHS		 1983}
1984
5c79de6e 1985#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 1986static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 1987 struct xfrm_kmaddress *k,
5424f32e 1988 struct nlattr **attrs, int *num)
5c79de6e 1989{
5424f32e 1990 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 1991 struct xfrm_user_migrate *um;
1992 int i, num_migrate;
1993
13c1d189
AE		 1994 if (k != NULL) {
1995 struct xfrm_user_kmaddress *uk;
1996
1997 uk = nla_data(attrs[XFRMA_KMADDRESS]);
1998 memcpy(&k->local, &uk->local, sizeof(k->local));
1999 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2000 k->family = uk->family;
2001 k->reserved = uk->reserved;
2002 }
2003
5424f32e
TG		 2004 um = nla_data(rt);
2005 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2006
2007 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2008 return -EINVAL;
2009
2010 for (i = 0; i < num_migrate; i++, um++, ma++) {
2011 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2012 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2013 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2014 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2015
2016 ma->proto = um->proto;
2017 ma->mode = um->mode;
2018 ma->reqid = um->reqid;
2019
2020 ma->old_family = um->old_family;
2021 ma->new_family = um->new_family;
2022 }
2023
2024 *num = i;
2025 return 0;
2026}
2027
2028static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2029 struct nlattr **attrs)
5c79de6e 2030{
7b67c857 2031 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2032 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2033 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2034 u8 type;
2035 int err;
2036 int n = 0;
2037
35a7aa08 2038 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2039 return -EINVAL;
5c79de6e 2040
13c1d189
AE		 2041 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2042
5424f32e 2043 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2044 if (err)
2045 return err;
2046
13c1d189 2047 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2048 if (err)
2049 return err;
2050
2051 if (!n)
2052 return 0;
2053
13c1d189 2054 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
5c79de6e
SS		 2055
2056 return 0;
2057}
2058#else
2059static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2060 struct nlattr **attrs)
5c79de6e
SS		 2061{
2062 return -ENOPROTOOPT;
2063}
2064#endif
2065
2066#ifdef CONFIG_XFRM_MIGRATE
183cad12 2067static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2068{
2069 struct xfrm_user_migrate um;
2070
2071 memset(&um, 0, sizeof(um));
2072 um.proto = m->proto;
2073 um.mode = m->mode;
2074 um.reqid = m->reqid;
2075 um.old_family = m->old_family;
2076 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2077 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2078 um.new_family = m->new_family;
2079 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2080 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2081
c0144bea 2082 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2083}
2084
183cad12 2085static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2086{
2087 struct xfrm_user_kmaddress uk;
2088
2089 memset(&uk, 0, sizeof(uk));
2090 uk.family = k->family;
2091 uk.reserved = k->reserved;
2092 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2093 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2094
2095 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2096}
2097
2098static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 2099{
2100 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 2101 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2102 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2103 + userpolicy_type_attrsize();
7deb2264
TG		 2104}
2105
183cad12
DM		 2106static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2107 int num_migrate, const struct xfrm_kmaddress *k,
2108 const struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e 2109{
183cad12 2110 const struct xfrm_migrate *mp;
5c79de6e
SS		 2111 struct xfrm_userpolicy_id *pol_id;
2112 struct nlmsghdr *nlh;
5c79de6e
SS		 2113 int i;
2114
79b8b7f4
TG		 2115 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2116 if (nlh == NULL)
2117 return -EMSGSIZE;
5c79de6e 2118
7b67c857 2119 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2120 /* copy data from selector, dir, and type to the pol_id */
2121 memset(pol_id, 0, sizeof(*pol_id));
2122 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2123 pol_id->dir = dir;
2124
13c1d189
AE		 2125 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
2126 goto nlmsg_failure;
2127
5c79de6e
SS		 2128 if (copy_to_user_policy_type(type, skb) < 0)
2129 goto nlmsg_failure;
2130
2131 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2132 if (copy_to_user_migrate(mp, skb) < 0)
2133 goto nlmsg_failure;
2134 }
2135
9825069d 2136 return nlmsg_end(skb, nlh);
5c79de6e 2137nlmsg_failure:
9825069d
TG		 2138 nlmsg_cancel(skb, nlh);
2139 return -EMSGSIZE;
5c79de6e
SS		 2140}
2141
183cad12
DM		 2142static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2143 const struct xfrm_migrate *m, int num_migrate,
2144 const struct xfrm_kmaddress *k)
5c79de6e 2145{
a6483b79 2146 struct net *net = &init_net;
5c79de6e 2147 struct sk_buff *skb;
5c79de6e 2148
13c1d189 2149 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2150 if (skb == NULL)
2151 return -ENOMEM;
2152
2153 /* build migrate */
13c1d189 2154 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2155 BUG();
2156
a6483b79 2157 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 2158}
2159#else
183cad12
DM		 2160static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2161 const struct xfrm_migrate *m, int num_migrate,
2162 const struct xfrm_kmaddress *k)
5c79de6e
SS		 2163{
2164 return -ENOPROTOOPT;
2165}
2166#endif
d51d081d 2167
a7bd9a45 2168#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2169
2170static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2171 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2172 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2173 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2174 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2175 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2176 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2177 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2178 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2179 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2180 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2181 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2182 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2183 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2184 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2185 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2186 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2187 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2188 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 2189 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2190 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2191};
2192
492b558b
TG		 2193#undef XMSGSIZE
2194
cf5cb79f 2195static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2196 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2197 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2198 [XFRMA_LASTUSED] = { .type = NLA_U64},
2199 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2200 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2201 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2202 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2203 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2204 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2205 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2206 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2207 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2208 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2209 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2210 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2211 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2212 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2213 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2214 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2215 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2216 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2217 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2218 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
cf5cb79f
TG		 2219};
2220
1da177e4 2221static struct xfrm_link {
5424f32e 2222 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2223 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2224 int (*done)(struct netlink_callback *);
492b558b
TG		 2225} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2226 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2227 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2228 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2229 .dump = xfrm_dump_sa,
2230 .done = xfrm_dump_sa_done },
492b558b
TG		 2231 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2232 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2233 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2234 .dump = xfrm_dump_policy,
2235 .done = xfrm_dump_policy_done },
492b558b 2236 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2237 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2238 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2239 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2240 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2241 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2242 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2243 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2244 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2245 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2246 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2247 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 2248 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2249};
2250
1d00a4eb 2251static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2252{
a6483b79 2253 struct net *net = sock_net(skb->sk);
35a7aa08 2254 struct nlattr *attrs[XFRMA_MAX+1];
1da177e4 2255 struct xfrm_link *link;
a7bd9a45 2256 int type, err;
1da177e4 2257
1da177e4 2258 type = nlh->nlmsg_type;
1da177e4 2259 if (type > XFRM_MSG_MAX)
1d00a4eb 2260 return -EINVAL;
1da177e4
LT		 2261
2262 type -= XFRM_MSG_BASE;
2263 link = &xfrm_dispatch[type];
2264
2265 /* All operations require privileges, even GET */
1d00a4eb
TG		 2266 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2267 return -EPERM;
1da177e4 2268
492b558b
TG		 2269 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2270 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2271 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2272 if (link->dump == NULL)
1d00a4eb 2273 return -EINVAL;
88fc2c84 2274
a6483b79 2275 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
1da177e4
LT		 2276 }
2277
35a7aa08 2278 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2279 xfrma_policy);
a7bd9a45
TG		 2280 if (err < 0)
2281 return err;
1da177e4
LT		 2282
2283 if (link->doit == NULL)
1d00a4eb 2284 return -EINVAL;
1da177e4 2285
5424f32e 2286 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2287}
2288
cd40b7d3 2289static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2290{
cd40b7d3
DL		 2291 mutex_lock(&xfrm_cfg_mutex);
2292 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2293 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 2294}
2295
7deb2264
TG		 2296static inline size_t xfrm_expire_msgsize(void)
2297{
6f26b61e
JHS		 2298 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2299 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2300}
2301
214e005b 2302static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2303{
2304 struct xfrm_user_expire *ue;
2305 struct nlmsghdr *nlh;
1da177e4 2306
79b8b7f4
TG		 2307 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2308 if (nlh == NULL)
2309 return -EMSGSIZE;
1da177e4 2310
7b67c857 2311 ue = nlmsg_data(nlh);
1da177e4 2312 copy_to_user_state(x, &ue->state);
d51d081d 2313 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2314
6f26b61e
JHS		 2315 if (xfrm_mark_put(skb, &x->mark))
2316 goto nla_put_failure;
2317
9825069d 2318 return nlmsg_end(skb, nlh);
6f26b61e
JHS		 2319
2320nla_put_failure:
2321 return -EMSGSIZE;
1da177e4
LT		 2322}
2323
214e005b 2324static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2325{
fc34acd3 2326 struct net *net = xs_net(x);
1da177e4
LT		 2327 struct sk_buff *skb;
2328
7deb2264 2329 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2330 if (skb == NULL)
2331 return -ENOMEM;
2332
6f26b61e
JHS		 2333 if (build_expire(skb, x, c) < 0) {
2334 kfree_skb(skb);
2335 return -EMSGSIZE;
2336 }
1da177e4 2337
a6483b79 2338 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2339}
2340
214e005b 2341static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2342{
fc34acd3 2343 struct net *net = xs_net(x);
d51d081d 2344 struct sk_buff *skb;
d51d081d 2345
d8647b79 2346 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2347 if (skb == NULL)
2348 return -ENOMEM;
2349
2350 if (build_aevent(skb, x, c) < 0)
2351 BUG();
2352
a6483b79 2353 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2354}
2355
214e005b 2356static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2357{
7067802e 2358 struct net *net = c->net;
26b15dad
JHS		 2359 struct xfrm_usersa_flush *p;
2360 struct nlmsghdr *nlh;
2361 struct sk_buff *skb;
7deb2264 2362 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2363
7deb2264 2364 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2365 if (skb == NULL)
2366 return -ENOMEM;
26b15dad 2367
79b8b7f4
TG		 2368 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2369 if (nlh == NULL) {
2370 kfree_skb(skb);
2371 return -EMSGSIZE;
2372 }
26b15dad 2373
7b67c857 2374 p = nlmsg_data(nlh);
bf08867f 2375 p->proto = c->data.proto;
26b15dad 2376
9825069d 2377 nlmsg_end(skb, nlh);
26b15dad 2378
a6483b79 2379 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2380}
2381
7deb2264 2382static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2383{
7deb2264 2384 size_t l = 0;
1a6509d9
HX		 2385 if (x->aead)
2386 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2387 if (x->aalg) {
2388 l += nla_total_size(sizeof(struct xfrm_algo) +
2389 (x->aalg->alg_key_len + 7) / 8);
2390 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2391 }
26b15dad 2392 if (x->ealg)
0f99be0d 2393 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2394 if (x->calg)
7deb2264 2395 l += nla_total_size(sizeof(*x->calg));
26b15dad 2396 if (x->encap)
7deb2264 2397 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2398 if (x->tfcpad)
2399 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2400 if (x->replay_esn)
2401 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
68325d3b
HX		 2402 if (x->security)
2403 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2404 x->security->ctx_len);
2405 if (x->coaddr)
2406 l += nla_total_size(sizeof(*x->coaddr));
2407
d26f3984
HX		 2408 /* Must count x->lastused as it may become non-zero behind our back. */
2409 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2410
2411 return l;
2412}
2413
214e005b 2414static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2415{
fc34acd3 2416 struct net *net = xs_net(x);
26b15dad 2417 struct xfrm_usersa_info *p;
0603eac0 2418 struct xfrm_usersa_id *id;
26b15dad
JHS		 2419 struct nlmsghdr *nlh;
2420 struct sk_buff *skb;
26b15dad 2421 int len = xfrm_sa_len(x);
0603eac0
HX		 2422 int headlen;
2423
2424 headlen = sizeof(*p);
2425 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2426 len += nla_total_size(headlen);
0603eac0 2427 headlen = sizeof(*id);
6f26b61e 2428 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2429 }
7deb2264 2430 len += NLMSG_ALIGN(headlen);
26b15dad 2431
7deb2264 2432 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2433 if (skb == NULL)
2434 return -ENOMEM;
26b15dad 2435
79b8b7f4
TG		 2436 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2437 if (nlh == NULL)
c0144bea 2438 goto nla_put_failure;
26b15dad 2439
7b67c857 2440 p = nlmsg_data(nlh);
0603eac0 2441 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2442 struct nlattr *attr;
2443
7b67c857 2444 id = nlmsg_data(nlh);
0603eac0
HX		 2445 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2446 id->spi = x->id.spi;
2447 id->family = x->props.family;
2448 id->proto = x->id.proto;
2449
c0144bea
TG		 2450 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2451 if (attr == NULL)
2452 goto nla_put_failure;
2453
2454 p = nla_data(attr);
0603eac0
HX		 2455 }
2456
68325d3b
HX		 2457 if (copy_to_user_state_extra(x, p, skb))
2458 goto nla_put_failure;
26b15dad 2459
9825069d 2460 nlmsg_end(skb, nlh);
26b15dad 2461
a6483b79 2462 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2463
c0144bea 2464nla_put_failure:
68325d3b
HX		 2465 /* Somebody screwed up with xfrm_sa_len! */
2466 WARN_ON(1);
26b15dad
JHS		 2467 kfree_skb(skb);
2468 return -1;
2469}
2470
214e005b 2471static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2472{
2473
2474 switch (c->event) {
f60f6b8f 2475 case XFRM_MSG_EXPIRE:
26b15dad 2476 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2477 case XFRM_MSG_NEWAE:
2478 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2479 case XFRM_MSG_DELSA:
2480 case XFRM_MSG_UPDSA:
2481 case XFRM_MSG_NEWSA:
26b15dad 2482 return xfrm_notify_sa(x, c);
f60f6b8f 2483 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2484 return xfrm_notify_sa_flush(c);
2485 default:
62db5cfd 2486 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2487 c->event);
2488 break;
26b15dad
JHS		 2489 }
2490
2491 return 0;
2492
2493}
2494
7deb2264
TG		 2495static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2496 struct xfrm_policy *xp)
2497{
2498 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2499 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2500 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2501 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2502 + userpolicy_type_attrsize();
2503}
2504
1da177e4
LT		 2505static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2506 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2507 int dir)
2508{
2509 struct xfrm_user_acquire *ua;
2510 struct nlmsghdr *nlh;
1da177e4
LT		 2511 __u32 seq = xfrm_get_acqseq();
2512
79b8b7f4
TG		 2513 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2514 if (nlh == NULL)
2515 return -EMSGSIZE;
1da177e4 2516
7b67c857 2517 ua = nlmsg_data(nlh);
1da177e4
LT		 2518 memcpy(&ua->id, &x->id, sizeof(ua->id));
2519 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2520 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2521 copy_to_user_policy(xp, &ua->policy, dir);
2522 ua->aalgos = xt->aalgos;
2523 ua->ealgos = xt->ealgos;
2524 ua->calgos = xt->calgos;
2525 ua->seq = x->km.seq = seq;
2526
2527 if (copy_to_user_tmpl(xp, skb) < 0)
2528 goto nlmsg_failure;
0d681623 2529 if (copy_to_user_state_sec_ctx(x, skb))
df71837d 2530 goto nlmsg_failure;
1459bb36 2531 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2532 goto nlmsg_failure;
295fae56
JHS		 2533 if (xfrm_mark_put(skb, &xp->mark))
2534 goto nla_put_failure;
1da177e4 2535
9825069d 2536 return nlmsg_end(skb, nlh);
1da177e4 2537
295fae56 2538nla_put_failure:
1da177e4 2539nlmsg_failure:
9825069d
TG		 2540 nlmsg_cancel(skb, nlh);
2541 return -EMSGSIZE;
1da177e4
LT		 2542}
2543
2544static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2545 struct xfrm_policy *xp, int dir)
2546{
a6483b79 2547 struct net *net = xs_net(x);
1da177e4 2548 struct sk_buff *skb;
1da177e4 2549
7deb2264 2550 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2551 if (skb == NULL)
2552 return -ENOMEM;
2553
2554 if (build_acquire(skb, x, xt, xp, dir) < 0)
2555 BUG();
2556
a6483b79 2557 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2558}
2559
2560/* User gives us xfrm_user_policy_info followed by an array of 0
2561 * or more templates.
2562 */
cb969f07 2563static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2564 u8 *data, int len, int *dir)
2565{
fc34acd3 2566 struct net *net = sock_net(sk);
1da177e4
LT		 2567 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2568 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2569 struct xfrm_policy *xp;
2570 int nr;
2571
cb969f07 2572 switch (sk->sk_family) {
1da177e4
LT		 2573 case AF_INET:
2574 if (opt != IP_XFRM_POLICY) {
2575 *dir = -EOPNOTSUPP;
2576 return NULL;
2577 }
2578 break;
2579#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2580 case AF_INET6:
2581 if (opt != IPV6_XFRM_POLICY) {
2582 *dir = -EOPNOTSUPP;
2583 return NULL;
2584 }
2585 break;
2586#endif
2587 default:
2588 *dir = -EINVAL;
2589 return NULL;
2590 }
2591
2592 *dir = -EINVAL;
2593
2594 if (len < sizeof(*p) ||
2595 verify_newpolicy_info(p))
2596 return NULL;
2597
2598 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2599 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2600 return NULL;
2601
a4f1bac6
HX		 2602 if (p->dir > XFRM_POLICY_OUT)
2603 return NULL;
2604
2f09a4d5 2605 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2606 if (xp == NULL) {
2607 *dir = -ENOBUFS;
2608 return NULL;
2609 }
2610
2611 copy_from_user_policy(xp, p);
f7b6983f 2612 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2613 copy_templates(xp, ut, nr);
2614
2615 *dir = p->dir;
2616
2617 return xp;
2618}
2619
7deb2264
TG		 2620static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2621{
2622 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2623 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2624 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2625 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2626 + userpolicy_type_attrsize();
2627}
2628
1da177e4 2629static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2630 int dir, const struct km_event *c)
1da177e4
LT		 2631{
2632 struct xfrm_user_polexpire *upe;
2633 struct nlmsghdr *nlh;
d51d081d 2634 int hard = c->data.hard;
1da177e4 2635
79b8b7f4
TG		 2636 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2637 if (nlh == NULL)
2638 return -EMSGSIZE;
1da177e4 2639
7b67c857 2640 upe = nlmsg_data(nlh);
1da177e4
LT		 2641 copy_to_user_policy(xp, &upe->pol, dir);
2642 if (copy_to_user_tmpl(xp, skb) < 0)
2643 goto nlmsg_failure;
df71837d
TJ		 2644 if (copy_to_user_sec_ctx(xp, skb))
2645 goto nlmsg_failure;
1459bb36 2646 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2647 goto nlmsg_failure;
295fae56
JHS		 2648 if (xfrm_mark_put(skb, &xp->mark))
2649 goto nla_put_failure;
1da177e4
LT		 2650 upe->hard = !!hard;
2651
9825069d 2652 return nlmsg_end(skb, nlh);
1da177e4 2653
295fae56 2654nla_put_failure:
1da177e4 2655nlmsg_failure:
9825069d
TG		 2656 nlmsg_cancel(skb, nlh);
2657 return -EMSGSIZE;
1da177e4
LT		 2658}
2659
214e005b 2660static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2661{
fc34acd3 2662 struct net *net = xp_net(xp);
1da177e4 2663 struct sk_buff *skb;
1da177e4 2664
7deb2264 2665 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2666 if (skb == NULL)
2667 return -ENOMEM;
2668
d51d081d 2669 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2670 BUG();
2671
a6483b79 2672 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2673}
2674
214e005b 2675static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2676{
fc34acd3 2677 struct net *net = xp_net(xp);
26b15dad 2678 struct xfrm_userpolicy_info *p;
0603eac0 2679 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2680 struct nlmsghdr *nlh;
2681 struct sk_buff *skb;
7deb2264 2682 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
0603eac0
HX		 2683 int headlen;
2684
2685 headlen = sizeof(*p);
2686 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2687 len += nla_total_size(headlen);
0603eac0
HX		 2688 headlen = sizeof(*id);
2689 }
cfbfd45a 2690 len += userpolicy_type_attrsize();
295fae56 2691 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2692 len += NLMSG_ALIGN(headlen);
26b15dad 2693
7deb2264 2694 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2695 if (skb == NULL)
2696 return -ENOMEM;
26b15dad 2697
79b8b7f4
TG		 2698 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2699 if (nlh == NULL)
2700 goto nlmsg_failure;
26b15dad 2701
7b67c857 2702 p = nlmsg_data(nlh);
0603eac0 2703 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2704 struct nlattr *attr;
2705
7b67c857 2706 id = nlmsg_data(nlh);
0603eac0
HX		 2707 memset(id, 0, sizeof(*id));
2708 id->dir = dir;
2709 if (c->data.byid)
2710 id->index = xp->index;
2711 else
2712 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2713
c0144bea
TG		 2714 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2715 if (attr == NULL)
2716 goto nlmsg_failure;
2717
2718 p = nla_data(attr);
0603eac0 2719 }
26b15dad 2720
26b15dad
JHS		 2721 copy_to_user_policy(xp, p, dir);
2722 if (copy_to_user_tmpl(xp, skb) < 0)
2723 goto nlmsg_failure;
1459bb36 2724 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2725 goto nlmsg_failure;
26b15dad 2726
295fae56
JHS		 2727 if (xfrm_mark_put(skb, &xp->mark))
2728 goto nla_put_failure;
2729
9825069d 2730 nlmsg_end(skb, nlh);
26b15dad 2731
a6483b79 2732 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2733
295fae56 2734nla_put_failure:
26b15dad
JHS		 2735nlmsg_failure:
2736 kfree_skb(skb);
2737 return -1;
2738}
2739
214e005b 2740static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 2741{
7067802e 2742 struct net *net = c->net;
26b15dad
JHS		 2743 struct nlmsghdr *nlh;
2744 struct sk_buff *skb;
26b15dad 2745
7deb2264 2746 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2747 if (skb == NULL)
2748 return -ENOMEM;
26b15dad 2749
79b8b7f4
TG		 2750 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2751 if (nlh == NULL)
2752 goto nlmsg_failure;
0c51f53c
JHS		 2753 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2754 goto nlmsg_failure;
26b15dad 2755
9825069d 2756 nlmsg_end(skb, nlh);
26b15dad 2757
a6483b79 2758 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2759
2760nlmsg_failure:
2761 kfree_skb(skb);
2762 return -1;
2763}
2764
214e005b 2765static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2766{
2767
2768 switch (c->event) {
f60f6b8f
HX		 2769 case XFRM_MSG_NEWPOLICY:
2770 case XFRM_MSG_UPDPOLICY:
2771 case XFRM_MSG_DELPOLICY:
26b15dad 2772 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2773 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2774 return xfrm_notify_policy_flush(c);
f60f6b8f 2775 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2776 return xfrm_exp_policy_notify(xp, dir, c);
2777 default:
62db5cfd 2778 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2779 c->event);
26b15dad
JHS		 2780 }
2781
2782 return 0;
2783
2784}
2785
7deb2264
TG		 2786static inline size_t xfrm_report_msgsize(void)
2787{
2788 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2789}
2790
97a64b45
MN		 2791static int build_report(struct sk_buff *skb, u8 proto,
2792 struct xfrm_selector *sel, xfrm_address_t *addr)
2793{
2794 struct xfrm_user_report *ur;
2795 struct nlmsghdr *nlh;
97a64b45 2796
79b8b7f4
TG		 2797 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2798 if (nlh == NULL)
2799 return -EMSGSIZE;
97a64b45 2800
7b67c857 2801 ur = nlmsg_data(nlh);
97a64b45
MN		 2802 ur->proto = proto;
2803 memcpy(&ur->sel, sel, sizeof(ur->sel));
2804
2805 if (addr)
c0144bea 2806 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
97a64b45 2807
9825069d 2808 return nlmsg_end(skb, nlh);
97a64b45 2809
c0144bea 2810nla_put_failure:
9825069d
TG		 2811 nlmsg_cancel(skb, nlh);
2812 return -EMSGSIZE;
97a64b45
MN		 2813}
2814
db983c11
AD		 2815static int xfrm_send_report(struct net *net, u8 proto,
2816 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2817{
2818 struct sk_buff *skb;
97a64b45 2819
7deb2264 2820 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2821 if (skb == NULL)
2822 return -ENOMEM;
2823
2824 if (build_report(skb, proto, sel, addr) < 0)
2825 BUG();
2826
a6483b79 2827 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2828}
2829
3a2dfbe8
MW		 2830static inline size_t xfrm_mapping_msgsize(void)
2831{
2832 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2833}
2834
2835static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2836 xfrm_address_t *new_saddr, __be16 new_sport)
2837{
2838 struct xfrm_user_mapping *um;
2839 struct nlmsghdr *nlh;
2840
2841 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2842 if (nlh == NULL)
2843 return -EMSGSIZE;
2844
2845 um = nlmsg_data(nlh);
2846
2847 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2848 um->id.spi = x->id.spi;
2849 um->id.family = x->props.family;
2850 um->id.proto = x->id.proto;
2851 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2852 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2853 um->new_sport = new_sport;
2854 um->old_sport = x->encap->encap_sport;
2855 um->reqid = x->props.reqid;
2856
2857 return nlmsg_end(skb, nlh);
2858}
2859
2860static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2861 __be16 sport)
2862{
a6483b79 2863 struct net *net = xs_net(x);
3a2dfbe8
MW		 2864 struct sk_buff *skb;
2865
2866 if (x->id.proto != IPPROTO_ESP)
2867 return -EINVAL;
2868
2869 if (!x->encap)
2870 return -EINVAL;
2871
2872 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2873 if (skb == NULL)
2874 return -ENOMEM;
2875
2876 if (build_mapping(skb, x, ipaddr, sport) < 0)
2877 BUG();
2878
a6483b79 2879 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2880}
2881
1da177e4
LT		 2882static struct xfrm_mgr netlink_mgr = {
2883 .id = "netlink",
2884 .notify = xfrm_send_state_notify,
2885 .acquire = xfrm_send_acquire,
2886 .compile_policy = xfrm_compile_policy,
2887 .notify_policy = xfrm_send_policy_notify,
97a64b45 2888 .report = xfrm_send_report,
5c79de6e 2889 .migrate = xfrm_send_migrate,
3a2dfbe8 2890 .new_mapping = xfrm_send_mapping,
1da177e4
LT		 2891};
2892
a6483b79 2893static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 2894{
be33690d
PM		 2895 struct sock *nlsk;
2896
a6483b79 2897 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
af65bdfc 2898 xfrm_netlink_rcv, NULL, THIS_MODULE);
be33690d 2899 if (nlsk == NULL)
1da177e4 2900 return -ENOMEM;
d79d792e 2901 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
a6483b79 2902 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 2903 return 0;
2904}
2905
d79d792e 2906static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 2907{
d79d792e
EB		 2908 struct net *net;
2909 list_for_each_entry(net, net_exit_list, exit_list)
2910 rcu_assign_pointer(net->xfrm.nlsk, NULL);
2911 synchronize_net();
2912 list_for_each_entry(net, net_exit_list, exit_list)
2913 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 2914}
2915
a6483b79 2916static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 2917 .init = xfrm_user_net_init,
2918 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 2919};
2920
2921static int __init xfrm_user_init(void)
2922{
2923 int rv;
2924
2925 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2926
2927 rv = register_pernet_subsys(&xfrm_user_net_ops);
2928 if (rv < 0)
2929 return rv;
2930 rv = xfrm_register_km(&netlink_mgr);
2931 if (rv < 0)
2932 unregister_pernet_subsys(&xfrm_user_net_ops);
2933 return rv;
2934}
2935
2936static void __exit xfrm_user_exit(void)
2937{
2938 xfrm_unregister_km(&netlink_mgr);
2939 unregister_pernet_subsys(&xfrm_user_net_ops);
2940}
2941
1da177e4
LT		 2942module_init(xfrm_user_init);
2943module_exit(xfrm_user_exit);
2944MODULE_LICENSE("GPL");
4fdb3bb7 2945MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 2946
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