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Merge branch 'bugzilla-14782' into release
[deliverable/linux.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
1da177e4 29#include <asm/uaccess.h>
e23c7194
MN		 30#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
31#include <linux/in6.h>
32#endif
1da177e4 33
1a6509d9
HX		 34static inline int aead_len(struct xfrm_algo_aead *alg)
35{
36 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
37}
38
5424f32e 39static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 40{
5424f32e 41 struct nlattr *rt = attrs[type];
1da177e4
LT		 42 struct xfrm_algo *algp;
43
44 if (!rt)
45 return 0;
46
5424f32e 47 algp = nla_data(rt);
0f99be0d 48 if (nla_len(rt) < xfrm_alg_len(algp))
31c26852
HX		 49 return -EINVAL;
50
1da177e4
LT		 51 switch (type) {
52 case XFRMA_ALG_AUTH:
1da177e4 53 case XFRMA_ALG_CRYPT:
1da177e4 54 case XFRMA_ALG_COMP:
1da177e4
LT		 55 break;
56
57 default:
58 return -EINVAL;
3ff50b79 59 }
1da177e4
LT		 60
61 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
62 return 0;
63}
64
4447bb33
MW		 65static int verify_auth_trunc(struct nlattr **attrs)
66{
67 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
68 struct xfrm_algo_auth *algp;
69
70 if (!rt)
71 return 0;
72
73 algp = nla_data(rt);
74 if (nla_len(rt) < xfrm_alg_auth_len(algp))
75 return -EINVAL;
76
77 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
78 return 0;
79}
80
1a6509d9
HX		 81static int verify_aead(struct nlattr **attrs)
82{
83 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
84 struct xfrm_algo_aead *algp;
85
86 if (!rt)
87 return 0;
88
89 algp = nla_data(rt);
90 if (nla_len(rt) < aead_len(algp))
91 return -EINVAL;
92
93 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
94 return 0;
95}
96
5424f32e 97static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 98 xfrm_address_t **addrp)
99{
5424f32e 100 struct nlattr *rt = attrs[type];
eb2971b6 101
cf5cb79f 102 if (rt && addrp)
5424f32e 103 *addrp = nla_data(rt);
eb2971b6 104}
df71837d 105
5424f32e 106static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 107{
5424f32e 108 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 109 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 110
111 if (!rt)
112 return 0;
113
5424f32e 114 uctx = nla_data(rt);
cf5cb79f 115 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 116 return -EINVAL;
117
118 return 0;
119}
120
121
1da177e4 122static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 123 struct nlattr **attrs)
1da177e4
LT		 124{
125 int err;
126
127 err = -EINVAL;
128 switch (p->family) {
129 case AF_INET:
130 break;
131
132 case AF_INET6:
133#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
134 break;
135#else
136 err = -EAFNOSUPPORT;
137 goto out;
138#endif
139
140 default:
141 goto out;
3ff50b79 142 }
1da177e4
LT		 143
144 err = -EINVAL;
145 switch (p->id.proto) {
146 case IPPROTO_AH:
4447bb33
MW		 147 if ((!attrs[XFRMA_ALG_AUTH] &&
148 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 149 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 150 attrs[XFRMA_ALG_CRYPT] ||
151 attrs[XFRMA_ALG_COMP])
1da177e4
LT		 152 goto out;
153 break;
154
155 case IPPROTO_ESP:
1a6509d9
HX		 156 if (attrs[XFRMA_ALG_COMP])
157 goto out;
158 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 159 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 160 !attrs[XFRMA_ALG_CRYPT] &&
161 !attrs[XFRMA_ALG_AEAD])
162 goto out;
163 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 164 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 165 attrs[XFRMA_ALG_CRYPT]) &&
166 attrs[XFRMA_ALG_AEAD])
1da177e4
LT		 167 goto out;
168 break;
169
170 case IPPROTO_COMP:
35a7aa08 171 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 172 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 173 attrs[XFRMA_ALG_AUTH] ||
4447bb33 174 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35a7aa08 175 attrs[XFRMA_ALG_CRYPT])
1da177e4
LT		 176 goto out;
177 break;
178
e23c7194
MN		 179#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
180 case IPPROTO_DSTOPTS:
181 case IPPROTO_ROUTING:
35a7aa08
TG		 182 if (attrs[XFRMA_ALG_COMP] ||
183 attrs[XFRMA_ALG_AUTH] ||
4447bb33 184 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 185 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 186 attrs[XFRMA_ALG_CRYPT] ||
187 attrs[XFRMA_ENCAP] ||
188 attrs[XFRMA_SEC_CTX] ||
189 !attrs[XFRMA_COADDR])
e23c7194
MN		 190 goto out;
191 break;
192#endif
193
1da177e4
LT		 194 default:
195 goto out;
3ff50b79 196 }
1da177e4 197
1a6509d9
HX		 198 if ((err = verify_aead(attrs)))
199 goto out;
4447bb33
MW		 200 if ((err = verify_auth_trunc(attrs)))
201 goto out;
35a7aa08 202 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 203 goto out;
35a7aa08 204 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 205 goto out;
35a7aa08 206 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 207 goto out;
35a7aa08 208 if ((err = verify_sec_ctx_len(attrs)))
df71837d 209 goto out;
1da177e4
LT		 210
211 err = -EINVAL;
212 switch (p->mode) {
7e49e6de
MN		 213 case XFRM_MODE_TRANSPORT:
214 case XFRM_MODE_TUNNEL:
060f02a3 215 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 216 case XFRM_MODE_BEET:
1da177e4
LT		 217 break;
218
219 default:
220 goto out;
3ff50b79 221 }
1da177e4
LT		 222
223 err = 0;
224
225out:
226 return err;
227}
228
229static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
230 struct xfrm_algo_desc *(*get_byname)(char *, int),
5424f32e 231 struct nlattr *rta)
1da177e4 232{
1da177e4
LT		 233 struct xfrm_algo *p, *ualg;
234 struct xfrm_algo_desc *algo;
235
236 if (!rta)
237 return 0;
238
5424f32e 239 ualg = nla_data(rta);
1da177e4
LT		 240
241 algo = get_byname(ualg->alg_name, 1);
242 if (!algo)
243 return -ENOSYS;
244 *props = algo->desc.sadb_alg_id;
245
0f99be0d 246 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 247 if (!p)
248 return -ENOMEM;
249
04ff1260 250 strcpy(p->alg_name, algo->name);
1da177e4
LT		 251 *algpp = p;
252 return 0;
253}
254
4447bb33
MW		 255static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
256 struct nlattr *rta)
257{
258 struct xfrm_algo *ualg;
259 struct xfrm_algo_auth *p;
260 struct xfrm_algo_desc *algo;
261
262 if (!rta)
263 return 0;
264
265 ualg = nla_data(rta);
266
267 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
268 if (!algo)
269 return -ENOSYS;
270 *props = algo->desc.sadb_alg_id;
271
272 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
273 if (!p)
274 return -ENOMEM;
275
276 strcpy(p->alg_name, algo->name);
277 p->alg_key_len = ualg->alg_key_len;
278 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
279 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
280
281 *algpp = p;
282 return 0;
283}
284
285static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
286 struct nlattr *rta)
287{
288 struct xfrm_algo_auth *p, *ualg;
289 struct xfrm_algo_desc *algo;
290
291 if (!rta)
292 return 0;
293
294 ualg = nla_data(rta);
295
296 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
297 if (!algo)
298 return -ENOSYS;
299 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
300 return -EINVAL;
301 *props = algo->desc.sadb_alg_id;
302
303 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
304 if (!p)
305 return -ENOMEM;
306
307 strcpy(p->alg_name, algo->name);
308 if (!p->alg_trunc_len)
309 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
310
311 *algpp = p;
312 return 0;
313}
314
1a6509d9
HX		 315static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
316 struct nlattr *rta)
317{
318 struct xfrm_algo_aead *p, *ualg;
319 struct xfrm_algo_desc *algo;
320
321 if (!rta)
322 return 0;
323
324 ualg = nla_data(rta);
325
326 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
327 if (!algo)
328 return -ENOSYS;
329 *props = algo->desc.sadb_alg_id;
330
331 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
332 if (!p)
333 return -ENOMEM;
334
335 strcpy(p->alg_name, algo->name);
336 *algpp = p;
337 return 0;
338}
339
661697f7 340static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 341{
df71837d
TJ		 342 int len = 0;
343
344 if (xfrm_ctx) {
345 len += sizeof(struct xfrm_user_sec_ctx);
346 len += xfrm_ctx->ctx_len;
347 }
348 return len;
349}
350
1da177e4
LT		 351static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
352{
353 memcpy(&x->id, &p->id, sizeof(x->id));
354 memcpy(&x->sel, &p->sel, sizeof(x->sel));
355 memcpy(&x->lft, &p->lft, sizeof(x->lft));
356 x->props.mode = p->mode;
357 x->props.replay_window = p->replay_window;
358 x->props.reqid = p->reqid;
359 x->props.family = p->family;
54489c14 360 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 361 x->props.flags = p->flags;
196b0036 362
ccf9b3b8 363 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 364 x->sel.family = p->family;
1da177e4
LT		 365}
366
d51d081d
JHS		 367/*
368 * someday when pfkey also has support, we could have the code
369 * somehow made shareable and move it to xfrm_state.c - JHS
370 *
371*/
5424f32e 372static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
d51d081d 373{
5424f32e
TG		 374 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
375 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
376 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
377 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d
JHS		 378
379 if (rp) {
380 struct xfrm_replay_state *replay;
5424f32e 381 replay = nla_data(rp);
d51d081d
JHS		 382 memcpy(&x->replay, replay, sizeof(*replay));
383 memcpy(&x->preplay, replay, sizeof(*replay));
384 }
385
386 if (lt) {
387 struct xfrm_lifetime_cur *ltime;
5424f32e 388 ltime = nla_data(lt);
d51d081d
JHS		 389 x->curlft.bytes = ltime->bytes;
390 x->curlft.packets = ltime->packets;
391 x->curlft.add_time = ltime->add_time;
392 x->curlft.use_time = ltime->use_time;
393 }
394
cf5cb79f 395 if (et)
5424f32e 396 x->replay_maxage = nla_get_u32(et);
d51d081d 397
cf5cb79f 398 if (rt)
5424f32e 399 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 400}
401
fc34acd3
AD		 402static struct xfrm_state *xfrm_state_construct(struct net *net,
403 struct xfrm_usersa_info *p,
5424f32e 404 struct nlattr **attrs,
1da177e4
LT		 405 int *errp)
406{
fc34acd3 407 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 408 int err = -ENOMEM;
409
410 if (!x)
411 goto error_no_put;
412
413 copy_from_user_state(x, p);
414
1a6509d9
HX		 415 if ((err = attach_aead(&x->aead, &x->props.ealgo,
416 attrs[XFRMA_ALG_AEAD])))
417 goto error;
4447bb33
MW		 418 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
419 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 420 goto error;
4447bb33
MW		 421 if (!x->props.aalgo) {
422 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
423 attrs[XFRMA_ALG_AUTH])))
424 goto error;
425 }
1da177e4
LT		 426 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
427 xfrm_ealg_get_byname,
35a7aa08 428 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 429 goto error;
430 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
431 xfrm_calg_get_byname,
35a7aa08 432 attrs[XFRMA_ALG_COMP])))
1da177e4 433 goto error;
fd21150a
TG		 434
435 if (attrs[XFRMA_ENCAP]) {
436 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
437 sizeof(*x->encap), GFP_KERNEL);
438 if (x->encap == NULL)
439 goto error;
440 }
441
442 if (attrs[XFRMA_COADDR]) {
443 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
444 sizeof(*x->coaddr), GFP_KERNEL);
445 if (x->coaddr == NULL)
446 goto error;
447 }
448
72cb6962 449 err = xfrm_init_state(x);
1da177e4
LT		 450 if (err)
451 goto error;
452
fd21150a
TG		 453 if (attrs[XFRMA_SEC_CTX] &&
454 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 455 goto error;
456
1da177e4 457 x->km.seq = p->seq;
b27aeadb 458 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 459 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 460 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d
JHS		 461 x->preplay.bitmap = 0;
462 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
463 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
464
465 /* override default values from above */
466
5424f32e 467 xfrm_update_ae_params(x, attrs);
1da177e4
LT		 468
469 return x;
470
471error:
472 x->km.state = XFRM_STATE_DEAD;
473 xfrm_state_put(x);
474error_no_put:
475 *errp = err;
476 return NULL;
477}
478
22e70050 479static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 480 struct nlattr **attrs)
1da177e4 481{
fc34acd3 482 struct net *net = sock_net(skb->sk);
7b67c857 483 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 484 struct xfrm_state *x;
485 int err;
26b15dad 486 struct km_event c;
2532386f
EP		 487 uid_t loginuid = NETLINK_CB(skb).loginuid;
488 u32 sessionid = NETLINK_CB(skb).sessionid;
489 u32 sid = NETLINK_CB(skb).sid;
1da177e4 490
35a7aa08 491 err = verify_newsa_info(p, attrs);
1da177e4
LT		 492 if (err)
493 return err;
494
fc34acd3 495 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 496 if (!x)
497 return err;
498
26b15dad 499 xfrm_state_hold(x);
1da177e4
LT		 500 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
501 err = xfrm_state_add(x);
502 else
503 err = xfrm_state_update(x);
504
2532386f 505 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 506
1da177e4
LT		 507 if (err < 0) {
508 x->km.state = XFRM_STATE_DEAD;
21380b81 509 __xfrm_state_put(x);
7d6dfe1f 510 goto out;
1da177e4
LT		 511 }
512
26b15dad
JHS		 513 c.seq = nlh->nlmsg_seq;
514 c.pid = nlh->nlmsg_pid;
f60f6b8f 515 c.event = nlh->nlmsg_type;
26b15dad
JHS		 516
517 km_state_notify(x, &c);
7d6dfe1f 518out:
26b15dad 519 xfrm_state_put(x);
1da177e4
LT		 520 return err;
521}
522
fc34acd3
AD		 523static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
524 struct xfrm_usersa_id *p,
5424f32e 525 struct nlattr **attrs,
eb2971b6
MN		 526 int *errp)
527{
528 struct xfrm_state *x = NULL;
529 int err;
530
531 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
532 err = -ESRCH;
fc34acd3 533 x = xfrm_state_lookup(net, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 534 } else {
535 xfrm_address_t *saddr = NULL;
536
35a7aa08 537 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 538 if (!saddr) {
539 err = -EINVAL;
540 goto out;
541 }
542
9abbffee 543 err = -ESRCH;
fc34acd3 544 x = xfrm_state_lookup_byaddr(net, &p->daddr, saddr,
221df1ed 545 p->proto, p->family);
eb2971b6
MN		 546 }
547
548 out:
549 if (!x && errp)
550 *errp = err;
551 return x;
552}
553
22e70050 554static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 555 struct nlattr **attrs)
1da177e4 556{
fc34acd3 557 struct net *net = sock_net(skb->sk);
1da177e4 558 struct xfrm_state *x;
eb2971b6 559 int err = -ESRCH;
26b15dad 560 struct km_event c;
7b67c857 561 struct xfrm_usersa_id *p = nlmsg_data(nlh);
2532386f
EP		 562 uid_t loginuid = NETLINK_CB(skb).loginuid;
563 u32 sessionid = NETLINK_CB(skb).sessionid;
564 u32 sid = NETLINK_CB(skb).sid;
1da177e4 565
fc34acd3 566 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 567 if (x == NULL)
eb2971b6 568 return err;
1da177e4 569
6f68dc37 570 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 571 goto out;
572
1da177e4 573 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 574 err = -EPERM;
575 goto out;
1da177e4
LT		 576 }
577
26b15dad 578 err = xfrm_state_delete(x);
161a09e7 579
c8c05a8e
CZ		 580 if (err < 0)
581 goto out;
26b15dad
JHS		 582
583 c.seq = nlh->nlmsg_seq;
584 c.pid = nlh->nlmsg_pid;
f60f6b8f 585 c.event = nlh->nlmsg_type;
26b15dad 586 km_state_notify(x, &c);
1da177e4 587
c8c05a8e 588out:
2532386f 589 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
c8c05a8e 590 xfrm_state_put(x);
26b15dad 591 return err;
1da177e4
LT		 592}
593
594static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
595{
596 memcpy(&p->id, &x->id, sizeof(p->id));
597 memcpy(&p->sel, &x->sel, sizeof(p->sel));
598 memcpy(&p->lft, &x->lft, sizeof(p->lft));
599 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
600 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 601 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 602 p->mode = x->props.mode;
603 p->replay_window = x->props.replay_window;
604 p->reqid = x->props.reqid;
605 p->family = x->props.family;
606 p->flags = x->props.flags;
607 p->seq = x->km.seq;
608}
609
610struct xfrm_dump_info {
611 struct sk_buff *in_skb;
612 struct sk_buff *out_skb;
613 u32 nlmsg_seq;
614 u16 nlmsg_flags;
1da177e4
LT		 615};
616
c0144bea
TG		 617static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
618{
c0144bea
TG		 619 struct xfrm_user_sec_ctx *uctx;
620 struct nlattr *attr;
68325d3b 621 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 622
623 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
624 if (attr == NULL)
625 return -EMSGSIZE;
626
627 uctx = nla_data(attr);
628 uctx->exttype = XFRMA_SEC_CTX;
629 uctx->len = ctx_size;
630 uctx->ctx_doi = s->ctx_doi;
631 uctx->ctx_alg = s->ctx_alg;
632 uctx->ctx_len = s->ctx_len;
633 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
634
635 return 0;
636}
637
4447bb33
MW		 638static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
639{
640 struct xfrm_algo *algo;
641 struct nlattr *nla;
642
643 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
644 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
645 if (!nla)
646 return -EMSGSIZE;
647
648 algo = nla_data(nla);
649 strcpy(algo->alg_name, auth->alg_name);
650 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
651 algo->alg_key_len = auth->alg_key_len;
652
653 return 0;
654}
655
68325d3b
HX		 656/* Don't change this without updating xfrm_sa_len! */
657static int copy_to_user_state_extra(struct xfrm_state *x,
658 struct xfrm_usersa_info *p,
659 struct sk_buff *skb)
1da177e4 660{
1da177e4
LT		 661 copy_to_user_state(x, p);
662
050f009e
HX		 663 if (x->coaddr)
664 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
665
666 if (x->lastused)
667 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
050f009e 668
1a6509d9
HX		 669 if (x->aead)
670 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
4447bb33
MW		 671 if (x->aalg) {
672 if (copy_to_user_auth(x->aalg, skb))
673 goto nla_put_failure;
674
675 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
676 xfrm_alg_auth_len(x->aalg), x->aalg);
677 }
1da177e4 678 if (x->ealg)
0f99be0d 679 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
1da177e4 680 if (x->calg)
c0144bea 681 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1da177e4
LT		 682
683 if (x->encap)
c0144bea 684 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1da177e4 685
c0144bea
TG		 686 if (x->security && copy_sec_ctx(x->security, skb) < 0)
687 goto nla_put_failure;
060f02a3 688
68325d3b
HX		 689 return 0;
690
691nla_put_failure:
692 return -EMSGSIZE;
693}
694
695static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
696{
697 struct xfrm_dump_info *sp = ptr;
698 struct sk_buff *in_skb = sp->in_skb;
699 struct sk_buff *skb = sp->out_skb;
700 struct xfrm_usersa_info *p;
701 struct nlmsghdr *nlh;
702 int err;
703
68325d3b
HX		 704 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
705 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
706 if (nlh == NULL)
707 return -EMSGSIZE;
708
709 p = nlmsg_data(nlh);
710
711 err = copy_to_user_state_extra(x, p, skb);
712 if (err)
713 goto nla_put_failure;
714
9825069d 715 nlmsg_end(skb, nlh);
1da177e4
LT		 716 return 0;
717
c0144bea 718nla_put_failure:
9825069d 719 nlmsg_cancel(skb, nlh);
68325d3b 720 return err;
1da177e4
LT		 721}
722
4c563f76
TT		 723static int xfrm_dump_sa_done(struct netlink_callback *cb)
724{
725 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
726 xfrm_state_walk_done(walk);
727 return 0;
728}
729
1da177e4
LT		 730static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
731{
fc34acd3 732 struct net *net = sock_net(skb->sk);
4c563f76 733 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 734 struct xfrm_dump_info info;
735
4c563f76
TT		 736 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
737 sizeof(cb->args) - sizeof(cb->args[0]));
738
1da177e4
LT		 739 info.in_skb = cb->skb;
740 info.out_skb = skb;
741 info.nlmsg_seq = cb->nlh->nlmsg_seq;
742 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 743
744 if (!cb->args[0]) {
745 cb->args[0] = 1;
746 xfrm_state_walk_init(walk, 0);
747 }
748
fc34acd3 749 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 750
751 return skb->len;
752}
753
754static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
755 struct xfrm_state *x, u32 seq)
756{
757 struct xfrm_dump_info info;
758 struct sk_buff *skb;
759
7deb2264 760 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 761 if (!skb)
762 return ERR_PTR(-ENOMEM);
763
1da177e4
LT		 764 info.in_skb = in_skb;
765 info.out_skb = skb;
766 info.nlmsg_seq = seq;
767 info.nlmsg_flags = 0;
1da177e4
LT		 768
769 if (dump_one_state(x, 0, &info)) {
770 kfree_skb(skb);
771 return NULL;
772 }
773
774 return skb;
775}
776
7deb2264
TG		 777static inline size_t xfrm_spdinfo_msgsize(void)
778{
779 return NLMSG_ALIGN(4)
780 + nla_total_size(sizeof(struct xfrmu_spdinfo))
781 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
782}
783
ecfd6b18
JHS		 784static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
785{
5a6d3416
JHS		 786 struct xfrmk_spdinfo si;
787 struct xfrmu_spdinfo spc;
788 struct xfrmu_spdhinfo sph;
ecfd6b18
JHS		 789 struct nlmsghdr *nlh;
790 u32 *f;
791
792 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
793 if (nlh == NULL) /* shouldnt really happen ... */
794 return -EMSGSIZE;
795
796 f = nlmsg_data(nlh);
797 *f = flags;
798 xfrm_spd_getinfo(&si);
5a6d3416
JHS		 799 spc.incnt = si.incnt;
800 spc.outcnt = si.outcnt;
801 spc.fwdcnt = si.fwdcnt;
802 spc.inscnt = si.inscnt;
803 spc.outscnt = si.outscnt;
804 spc.fwdscnt = si.fwdscnt;
805 sph.spdhcnt = si.spdhcnt;
806 sph.spdhmcnt = si.spdhmcnt;
807
808 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
809 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
ecfd6b18
JHS		 810
811 return nlmsg_end(skb, nlh);
812
813nla_put_failure:
814 nlmsg_cancel(skb, nlh);
815 return -EMSGSIZE;
816}
817
818static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 819 struct nlattr **attrs)
ecfd6b18 820{
a6483b79 821 struct net *net = sock_net(skb->sk);
ecfd6b18 822 struct sk_buff *r_skb;
7b67c857 823 u32 *flags = nlmsg_data(nlh);
ecfd6b18
JHS		 824 u32 spid = NETLINK_CB(skb).pid;
825 u32 seq = nlh->nlmsg_seq;
ecfd6b18 826
7deb2264 827 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 828 if (r_skb == NULL)
829 return -ENOMEM;
830
831 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
832 BUG();
833
a6483b79 834 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
ecfd6b18
JHS		 835}
836
7deb2264
TG		 837static inline size_t xfrm_sadinfo_msgsize(void)
838{
839 return NLMSG_ALIGN(4)
840 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
841 + nla_total_size(4); /* XFRMA_SAD_CNT */
842}
843
28d8909b
JHS		 844static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
845{
af11e316
JHS		 846 struct xfrmk_sadinfo si;
847 struct xfrmu_sadhinfo sh;
28d8909b
JHS		 848 struct nlmsghdr *nlh;
849 u32 *f;
850
851 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
852 if (nlh == NULL) /* shouldnt really happen ... */
853 return -EMSGSIZE;
854
855 f = nlmsg_data(nlh);
856 *f = flags;
857 xfrm_sad_getinfo(&si);
858
af11e316
JHS		 859 sh.sadhmcnt = si.sadhmcnt;
860 sh.sadhcnt = si.sadhcnt;
861
862 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
863 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
28d8909b
JHS		 864
865 return nlmsg_end(skb, nlh);
866
867nla_put_failure:
868 nlmsg_cancel(skb, nlh);
869 return -EMSGSIZE;
870}
871
872static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 873 struct nlattr **attrs)
28d8909b 874{
a6483b79 875 struct net *net = sock_net(skb->sk);
28d8909b 876 struct sk_buff *r_skb;
7b67c857 877 u32 *flags = nlmsg_data(nlh);
28d8909b
JHS		 878 u32 spid = NETLINK_CB(skb).pid;
879 u32 seq = nlh->nlmsg_seq;
28d8909b 880
7deb2264 881 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 882 if (r_skb == NULL)
883 return -ENOMEM;
884
885 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
886 BUG();
887
a6483b79 888 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
28d8909b
JHS		 889}
890
22e70050 891static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 892 struct nlattr **attrs)
1da177e4 893{
fc34acd3 894 struct net *net = sock_net(skb->sk);
7b67c857 895 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 896 struct xfrm_state *x;
897 struct sk_buff *resp_skb;
eb2971b6 898 int err = -ESRCH;
1da177e4 899
fc34acd3 900 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 901 if (x == NULL)
902 goto out_noput;
903
904 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
905 if (IS_ERR(resp_skb)) {
906 err = PTR_ERR(resp_skb);
907 } else {
a6483b79 908 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 909 }
910 xfrm_state_put(x);
911out_noput:
912 return err;
913}
914
915static int verify_userspi_info(struct xfrm_userspi_info *p)
916{
917 switch (p->info.id.proto) {
918 case IPPROTO_AH:
919 case IPPROTO_ESP:
920 break;
921
922 case IPPROTO_COMP:
923 /* IPCOMP spi is 16-bits. */
924 if (p->max >= 0x10000)
925 return -EINVAL;
926 break;
927
928 default:
929 return -EINVAL;
3ff50b79 930 }
1da177e4
LT		 931
932 if (p->min > p->max)
933 return -EINVAL;
934
935 return 0;
936}
937
22e70050 938static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 939 struct nlattr **attrs)
1da177e4 940{
fc34acd3 941 struct net *net = sock_net(skb->sk);
1da177e4
LT		 942 struct xfrm_state *x;
943 struct xfrm_userspi_info *p;
944 struct sk_buff *resp_skb;
945 xfrm_address_t *daddr;
946 int family;
947 int err;
948
7b67c857 949 p = nlmsg_data(nlh);
1da177e4
LT		 950 err = verify_userspi_info(p);
951 if (err)
952 goto out_noput;
953
954 family = p->info.family;
955 daddr = &p->info.id.daddr;
956
957 x = NULL;
958 if (p->info.seq) {
a6483b79 959 x = xfrm_find_acq_byseq(net, p->info.seq);
1da177e4
LT		 960 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
961 xfrm_state_put(x);
962 x = NULL;
963 }
964 }
965
966 if (!x)
a6483b79 967 x = xfrm_find_acq(net, p->info.mode, p->info.reqid,
1da177e4
LT		 968 p->info.id.proto, daddr,
969 &p->info.saddr, 1,
970 family);
971 err = -ENOENT;
972 if (x == NULL)
973 goto out_noput;
974
658b219e
HX		 975 err = xfrm_alloc_spi(x, p->min, p->max);
976 if (err)
977 goto out;
1da177e4 978
658b219e 979 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 980 if (IS_ERR(resp_skb)) {
981 err = PTR_ERR(resp_skb);
982 goto out;
983 }
984
a6483b79 985 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 986
987out:
988 xfrm_state_put(x);
989out_noput:
990 return err;
991}
992
b798a9ed 993static int verify_policy_dir(u8 dir)
1da177e4
LT		 994{
995 switch (dir) {
996 case XFRM_POLICY_IN:
997 case XFRM_POLICY_OUT:
998 case XFRM_POLICY_FWD:
999 break;
1000
1001 default:
1002 return -EINVAL;
3ff50b79 1003 }
1da177e4
LT		 1004
1005 return 0;
1006}
1007
b798a9ed 1008static int verify_policy_type(u8 type)
f7b6983f
MN		 1009{
1010 switch (type) {
1011 case XFRM_POLICY_TYPE_MAIN:
1012#ifdef CONFIG_XFRM_SUB_POLICY
1013 case XFRM_POLICY_TYPE_SUB:
1014#endif
1015 break;
1016
1017 default:
1018 return -EINVAL;
3ff50b79 1019 }
f7b6983f
MN		 1020
1021 return 0;
1022}
1023
1da177e4
LT		 1024static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1025{
1026 switch (p->share) {
1027 case XFRM_SHARE_ANY:
1028 case XFRM_SHARE_SESSION:
1029 case XFRM_SHARE_USER:
1030 case XFRM_SHARE_UNIQUE:
1031 break;
1032
1033 default:
1034 return -EINVAL;
3ff50b79 1035 }
1da177e4
LT		 1036
1037 switch (p->action) {
1038 case XFRM_POLICY_ALLOW:
1039 case XFRM_POLICY_BLOCK:
1040 break;
1041
1042 default:
1043 return -EINVAL;
3ff50b79 1044 }
1da177e4
LT		 1045
1046 switch (p->sel.family) {
1047 case AF_INET:
1048 break;
1049
1050 case AF_INET6:
1051#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1052 break;
1053#else
1054 return -EAFNOSUPPORT;
1055#endif
1056
1057 default:
1058 return -EINVAL;
3ff50b79 1059 }
1da177e4
LT		 1060
1061 return verify_policy_dir(p->dir);
1062}
1063
5424f32e 1064static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1065{
5424f32e 1066 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1067 struct xfrm_user_sec_ctx *uctx;
1068
1069 if (!rt)
1070 return 0;
1071
5424f32e 1072 uctx = nla_data(rt);
03e1ad7b 1073 return security_xfrm_policy_alloc(&pol->security, uctx);
df71837d
TJ		 1074}
1075
1da177e4
LT		 1076static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1077 int nr)
1078{
1079 int i;
1080
1081 xp->xfrm_nr = nr;
1082 for (i = 0; i < nr; i++, ut++) {
1083 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1084
1085 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1086 memcpy(&t->saddr, &ut->saddr,
1087 sizeof(xfrm_address_t));
1088 t->reqid = ut->reqid;
1089 t->mode = ut->mode;
1090 t->share = ut->share;
1091 t->optional = ut->optional;
1092 t->aalgos = ut->aalgos;
1093 t->ealgos = ut->ealgos;
1094 t->calgos = ut->calgos;
c5d18e98
HX		 1095 /* If all masks are ~0, then we allow all algorithms. */
1096 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1097 t->encap_family = ut->family;
1da177e4
LT		 1098 }
1099}
1100
b4ad86bf
DM		 1101static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1102{
1103 int i;
1104
1105 if (nr > XFRM_MAX_DEPTH)
1106 return -EINVAL;
1107
1108 for (i = 0; i < nr; i++) {
1109 /* We never validated the ut->family value, so many
1110 * applications simply leave it at zero. The check was
1111 * never made and ut->family was ignored because all
1112 * templates could be assumed to have the same family as
1113 * the policy itself. Now that we will have ipv4-in-ipv6
1114 * and ipv6-in-ipv4 tunnels, this is no longer true.
1115 */
1116 if (!ut[i].family)
1117 ut[i].family = family;
1118
1119 switch (ut[i].family) {
1120 case AF_INET:
1121 break;
1122#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1123 case AF_INET6:
1124 break;
1125#endif
1126 default:
1127 return -EINVAL;
3ff50b79 1128 }
b4ad86bf
DM		 1129 }
1130
1131 return 0;
1132}
1133
5424f32e 1134static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1135{
5424f32e 1136 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1137
1138 if (!rt) {
1139 pol->xfrm_nr = 0;
1140 } else {
5424f32e
TG		 1141 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1142 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1143 int err;
1da177e4 1144
b4ad86bf
DM		 1145 err = validate_tmpl(nr, utmpl, pol->family);
1146 if (err)
1147 return err;
1da177e4 1148
5424f32e 1149 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1150 }
1151 return 0;
1152}
1153
5424f32e 1154static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1155{
5424f32e 1156 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1157 struct xfrm_userpolicy_type *upt;
b798a9ed 1158 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1159 int err;
1160
1161 if (rt) {
5424f32e 1162 upt = nla_data(rt);
f7b6983f
MN		 1163 type = upt->type;
1164 }
1165
1166 err = verify_policy_type(type);
1167 if (err)
1168 return err;
1169
1170 *tp = type;
1171 return 0;
1172}
1173
1da177e4
LT		 1174static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1175{
1176 xp->priority = p->priority;
1177 xp->index = p->index;
1178 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1179 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1180 xp->action = p->action;
1181 xp->flags = p->flags;
1182 xp->family = p->sel.family;
1183 /* XXX xp->share = p->share; */
1184}
1185
1186static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1187{
1188 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1189 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1190 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1191 p->priority = xp->priority;
1192 p->index = xp->index;
1193 p->sel.family = xp->family;
1194 p->dir = dir;
1195 p->action = xp->action;
1196 p->flags = xp->flags;
1197 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1198}
1199
fc34acd3 1200static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1201{
fc34acd3 1202 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1203 int err;
1204
1205 if (!xp) {
1206 *errp = -ENOMEM;
1207 return NULL;
1208 }
1209
1210 copy_from_user_policy(xp, p);
df71837d 1211
35a7aa08 1212 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1213 if (err)
1214 goto error;
1215
35a7aa08
TG		 1216 if (!(err = copy_from_user_tmpl(xp, attrs)))
1217 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1218 if (err)
1219 goto error;
1da177e4
LT		 1220
1221 return xp;
f7b6983f
MN		 1222 error:
1223 *errp = err;
12a169e7 1224 xp->walk.dead = 1;
64c31b3f 1225 xfrm_policy_destroy(xp);
f7b6983f 1226 return NULL;
1da177e4
LT		 1227}
1228
22e70050 1229static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1230 struct nlattr **attrs)
1da177e4 1231{
fc34acd3 1232 struct net *net = sock_net(skb->sk);
7b67c857 1233 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1234 struct xfrm_policy *xp;
26b15dad 1235 struct km_event c;
1da177e4
LT		 1236 int err;
1237 int excl;
2532386f
EP		 1238 uid_t loginuid = NETLINK_CB(skb).loginuid;
1239 u32 sessionid = NETLINK_CB(skb).sessionid;
1240 u32 sid = NETLINK_CB(skb).sid;
1da177e4
LT		 1241
1242 err = verify_newpolicy_info(p);
df71837d
TJ		 1243 if (err)
1244 return err;
35a7aa08 1245 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1246 if (err)
1247 return err;
1248
fc34acd3 1249 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1250 if (!xp)
1251 return err;
1252
26b15dad
JHS		 1253 /* shouldnt excl be based on nlh flags??
1254 * Aha! this is anti-netlink really i.e more pfkey derived
1255 * in netlink excl is a flag and you wouldnt need
1256 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1257 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1258 err = xfrm_policy_insert(p->dir, xp, excl);
2532386f 1259 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 1260
1da177e4 1261 if (err) {
03e1ad7b 1262 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1263 kfree(xp);
1264 return err;
1265 }
1266
f60f6b8f 1267 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1268 c.seq = nlh->nlmsg_seq;
1269 c.pid = nlh->nlmsg_pid;
1270 km_policy_notify(xp, p->dir, &c);
1271
1da177e4
LT		 1272 xfrm_pol_put(xp);
1273
1274 return 0;
1275}
1276
1277static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1278{
1279 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1280 int i;
1281
1282 if (xp->xfrm_nr == 0)
1283 return 0;
1284
1285 for (i = 0; i < xp->xfrm_nr; i++) {
1286 struct xfrm_user_tmpl *up = &vec[i];
1287 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1288
1289 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1290 up->family = kp->encap_family;
1da177e4
LT		 1291 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1292 up->reqid = kp->reqid;
1293 up->mode = kp->mode;
1294 up->share = kp->share;
1295 up->optional = kp->optional;
1296 up->aalgos = kp->aalgos;
1297 up->ealgos = kp->ealgos;
1298 up->calgos = kp->calgos;
1299 }
df71837d 1300
c0144bea
TG		 1301 return nla_put(skb, XFRMA_TMPL,
1302 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1303}
1304
1305static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1306{
1307 if (x->security) {
1308 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1309 }
1310 return 0;
0d681623 1311}
df71837d 1312
0d681623
SH		 1313static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1314{
1315 if (xp->security) {
1316 return copy_sec_ctx(xp->security, skb);
1317 }
1318 return 0;
df71837d 1319}
cfbfd45a
TG		 1320static inline size_t userpolicy_type_attrsize(void)
1321{
1322#ifdef CONFIG_XFRM_SUB_POLICY
1323 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1324#else
1325 return 0;
1326#endif
1327}
df71837d 1328
f7b6983f 1329#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1330static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1331{
c0144bea
TG		 1332 struct xfrm_userpolicy_type upt = {
1333 .type = type,
1334 };
f7b6983f 1335
c0144bea 1336 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1337}
1338
1339#else
b798a9ed 1340static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1341{
1342 return 0;
1343}
1344#endif
1345
1da177e4
LT		 1346static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1347{
1348 struct xfrm_dump_info *sp = ptr;
1349 struct xfrm_userpolicy_info *p;
1350 struct sk_buff *in_skb = sp->in_skb;
1351 struct sk_buff *skb = sp->out_skb;
1352 struct nlmsghdr *nlh;
1da177e4 1353
79b8b7f4
TG		 1354 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1355 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1356 if (nlh == NULL)
1357 return -EMSGSIZE;
1da177e4 1358
7b67c857 1359 p = nlmsg_data(nlh);
1da177e4
LT		 1360 copy_to_user_policy(xp, p, dir);
1361 if (copy_to_user_tmpl(xp, skb) < 0)
1362 goto nlmsg_failure;
df71837d
TJ		 1363 if (copy_to_user_sec_ctx(xp, skb))
1364 goto nlmsg_failure;
1459bb36 1365 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 1366 goto nlmsg_failure;
1da177e4 1367
9825069d 1368 nlmsg_end(skb, nlh);
1da177e4
LT		 1369 return 0;
1370
1371nlmsg_failure:
9825069d
TG		 1372 nlmsg_cancel(skb, nlh);
1373 return -EMSGSIZE;
1da177e4
LT		 1374}
1375
4c563f76
TT		 1376static int xfrm_dump_policy_done(struct netlink_callback *cb)
1377{
1378 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1379
1380 xfrm_policy_walk_done(walk);
1381 return 0;
1382}
1383
1da177e4
LT		 1384static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1385{
fc34acd3 1386 struct net *net = sock_net(skb->sk);
4c563f76 1387 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1388 struct xfrm_dump_info info;
1389
4c563f76
TT		 1390 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1391 sizeof(cb->args) - sizeof(cb->args[0]));
1392
1da177e4
LT		 1393 info.in_skb = cb->skb;
1394 info.out_skb = skb;
1395 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1396 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1397
1398 if (!cb->args[0]) {
1399 cb->args[0] = 1;
1400 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1401 }
1402
fc34acd3 1403 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1404
1405 return skb->len;
1406}
1407
1408static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1409 struct xfrm_policy *xp,
1410 int dir, u32 seq)
1411{
1412 struct xfrm_dump_info info;
1413 struct sk_buff *skb;
1414
7deb2264 1415 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1416 if (!skb)
1417 return ERR_PTR(-ENOMEM);
1418
1da177e4
LT		 1419 info.in_skb = in_skb;
1420 info.out_skb = skb;
1421 info.nlmsg_seq = seq;
1422 info.nlmsg_flags = 0;
1da177e4
LT		 1423
1424 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1425 kfree_skb(skb);
1426 return NULL;
1427 }
1428
1429 return skb;
1430}
1431
22e70050 1432static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1433 struct nlattr **attrs)
1da177e4 1434{
fc34acd3 1435 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1436 struct xfrm_policy *xp;
1437 struct xfrm_userpolicy_id *p;
b798a9ed 1438 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1439 int err;
26b15dad 1440 struct km_event c;
1da177e4
LT		 1441 int delete;
1442
7b67c857 1443 p = nlmsg_data(nlh);
1da177e4
LT		 1444 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1445
35a7aa08 1446 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1447 if (err)
1448 return err;
1449
1da177e4
LT		 1450 err = verify_policy_dir(p->dir);
1451 if (err)
1452 return err;
1453
1454 if (p->index)
a6483b79 1455 xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err);
df71837d 1456 else {
5424f32e 1457 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1458 struct xfrm_sec_ctx *ctx;
df71837d 1459
35a7aa08 1460 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1461 if (err)
1462 return err;
1463
2c8dd116 1464 ctx = NULL;
df71837d 1465 if (rt) {
5424f32e 1466 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1467
03e1ad7b
PM		 1468 err = security_xfrm_policy_alloc(&ctx, uctx);
1469 if (err)
df71837d 1470 return err;
2c8dd116 1471 }
a6483b79 1472 xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx,
ef41aaa0 1473 delete, &err);
03e1ad7b 1474 security_xfrm_policy_free(ctx);
df71837d 1475 }
1da177e4
LT		 1476 if (xp == NULL)
1477 return -ENOENT;
1478
1479 if (!delete) {
1480 struct sk_buff *resp_skb;
1481
1482 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1483 if (IS_ERR(resp_skb)) {
1484 err = PTR_ERR(resp_skb);
1485 } else {
a6483b79 1486 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
082a1ad5 1487 NETLINK_CB(skb).pid);
1da177e4 1488 }
26b15dad 1489 } else {
2532386f
EP		 1490 uid_t loginuid = NETLINK_CB(skb).loginuid;
1491 u32 sessionid = NETLINK_CB(skb).sessionid;
1492 u32 sid = NETLINK_CB(skb).sid;
1493
1494 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1495 sid);
13fcfbb0
DM		 1496
1497 if (err != 0)
c8c05a8e 1498 goto out;
13fcfbb0 1499
e7443892 1500 c.data.byid = p->index;
f60f6b8f 1501 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1502 c.seq = nlh->nlmsg_seq;
1503 c.pid = nlh->nlmsg_pid;
1504 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1505 }
1506
c8c05a8e 1507out:
ef41aaa0 1508 xfrm_pol_put(xp);
1da177e4
LT		 1509 return err;
1510}
1511
22e70050 1512static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1513 struct nlattr **attrs)
1da177e4 1514{
fc34acd3 1515 struct net *net = sock_net(skb->sk);
26b15dad 1516 struct km_event c;
7b67c857 1517 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1518 struct xfrm_audit audit_info;
4aa2e62c 1519 int err;
1da177e4 1520
161a09e7 1521 audit_info.loginuid = NETLINK_CB(skb).loginuid;
2532386f 1522 audit_info.sessionid = NETLINK_CB(skb).sessionid;
161a09e7 1523 audit_info.secid = NETLINK_CB(skb).sid;
fc34acd3 1524 err = xfrm_state_flush(net, p->proto, &audit_info);
4aa2e62c
JL		 1525 if (err)
1526 return err;
bf08867f 1527 c.data.proto = p->proto;
f60f6b8f 1528 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1529 c.seq = nlh->nlmsg_seq;
1530 c.pid = nlh->nlmsg_pid;
7067802e 1531 c.net = net;
26b15dad
JHS		 1532 km_state_notify(NULL, &c);
1533
1da177e4
LT		 1534 return 0;
1535}
1536
7deb2264
TG		 1537static inline size_t xfrm_aevent_msgsize(void)
1538{
1539 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1540 + nla_total_size(sizeof(struct xfrm_replay_state))
1541 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1542 + nla_total_size(4) /* XFRM_AE_RTHR */
1543 + nla_total_size(4); /* XFRM_AE_ETHR */
1544}
d51d081d
JHS		 1545
1546static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1547{
1548 struct xfrm_aevent_id *id;
1549 struct nlmsghdr *nlh;
d51d081d 1550
79b8b7f4
TG		 1551 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1552 if (nlh == NULL)
1553 return -EMSGSIZE;
d51d081d 1554
7b67c857 1555 id = nlmsg_data(nlh);
2b5f6dcc 1556 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1557 id->sa_id.spi = x->id.spi;
1558 id->sa_id.family = x->props.family;
1559 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1560 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1561 id->reqid = x->props.reqid;
d51d081d
JHS		 1562 id->flags = c->data.aevent;
1563
c0144bea
TG		 1564 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1565 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
d51d081d 1566
c0144bea
TG		 1567 if (id->flags & XFRM_AE_RTHR)
1568 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
d51d081d 1569
c0144bea
TG		 1570 if (id->flags & XFRM_AE_ETHR)
1571 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1572 x->replay_maxage * 10 / HZ);
d51d081d 1573
9825069d 1574 return nlmsg_end(skb, nlh);
d51d081d 1575
c0144bea 1576nla_put_failure:
9825069d
TG		 1577 nlmsg_cancel(skb, nlh);
1578 return -EMSGSIZE;
d51d081d
JHS		 1579}
1580
22e70050 1581static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1582 struct nlattr **attrs)
d51d081d 1583{
fc34acd3 1584 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1585 struct xfrm_state *x;
1586 struct sk_buff *r_skb;
1587 int err;
1588 struct km_event c;
7b67c857 1589 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1590 struct xfrm_usersa_id *id = &p->sa_id;
1591
7deb2264 1592 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 1593 if (r_skb == NULL)
1594 return -ENOMEM;
1595
a6483b79 1596 x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family);
d51d081d 1597 if (x == NULL) {
b08d5840 1598 kfree_skb(r_skb);
d51d081d
JHS		 1599 return -ESRCH;
1600 }
1601
1602 /*
1603 * XXX: is this lock really needed - none of the other
1604 * gets lock (the concern is things getting updated
1605 * while we are still reading) - jhs
1606 */
1607 spin_lock_bh(&x->lock);
1608 c.data.aevent = p->flags;
1609 c.seq = nlh->nlmsg_seq;
1610 c.pid = nlh->nlmsg_pid;
1611
1612 if (build_aevent(r_skb, x, &c) < 0)
1613 BUG();
a6483b79 1614 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
d51d081d
JHS		 1615 spin_unlock_bh(&x->lock);
1616 xfrm_state_put(x);
1617 return err;
1618}
1619
22e70050 1620static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1621 struct nlattr **attrs)
d51d081d 1622{
fc34acd3 1623 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1624 struct xfrm_state *x;
1625 struct km_event c;
1626 int err = - EINVAL;
7b67c857 1627 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e
TG		 1628 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1629 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d
JHS		 1630
1631 if (!lt && !rp)
1632 return err;
1633
1634 /* pedantic mode - thou shalt sayeth replaceth */
1635 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1636 return err;
1637
fc34acd3 1638 x = xfrm_state_lookup(net, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1639 if (x == NULL)
1640 return -ESRCH;
1641
1642 if (x->km.state != XFRM_STATE_VALID)
1643 goto out;
1644
1645 spin_lock_bh(&x->lock);
35a7aa08 1646 xfrm_update_ae_params(x, attrs);
d51d081d 1647 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1648
1649 c.event = nlh->nlmsg_type;
1650 c.seq = nlh->nlmsg_seq;
1651 c.pid = nlh->nlmsg_pid;
1652 c.data.aevent = XFRM_AE_CU;
1653 km_state_notify(x, &c);
1654 err = 0;
1655out:
1656 xfrm_state_put(x);
1657 return err;
1658}
1659
22e70050 1660static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1661 struct nlattr **attrs)
1da177e4 1662{
fc34acd3 1663 struct net *net = sock_net(skb->sk);
f7b6983f 1664 struct km_event c;
b798a9ed 1665 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1666 int err;
161a09e7 1667 struct xfrm_audit audit_info;
f7b6983f 1668
35a7aa08 1669 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1670 if (err)
1671 return err;
26b15dad 1672
161a09e7 1673 audit_info.loginuid = NETLINK_CB(skb).loginuid;
2532386f 1674 audit_info.sessionid = NETLINK_CB(skb).sessionid;
161a09e7 1675 audit_info.secid = NETLINK_CB(skb).sid;
fc34acd3 1676 err = xfrm_policy_flush(net, type, &audit_info);
4aa2e62c
JL		 1677 if (err)
1678 return err;
f7b6983f 1679 c.data.type = type;
f60f6b8f 1680 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1681 c.seq = nlh->nlmsg_seq;
1682 c.pid = nlh->nlmsg_pid;
7067802e 1683 c.net = net;
26b15dad 1684 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1685 return 0;
1686}
1687
22e70050 1688static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1689 struct nlattr **attrs)
6c5c8ca7 1690{
fc34acd3 1691 struct net *net = sock_net(skb->sk);
6c5c8ca7 1692 struct xfrm_policy *xp;
7b67c857 1693 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1694 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1695 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7
JHS		 1696 int err = -ENOENT;
1697
35a7aa08 1698 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1699 if (err)
1700 return err;
1701
6c5c8ca7 1702 if (p->index)
fc34acd3 1703 xp = xfrm_policy_byid(net, type, p->dir, p->index, 0, &err);
6c5c8ca7 1704 else {
5424f32e 1705 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1706 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1707
35a7aa08 1708 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1709 if (err)
1710 return err;
1711
2c8dd116 1712 ctx = NULL;
6c5c8ca7 1713 if (rt) {
5424f32e 1714 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1715
03e1ad7b
PM		 1716 err = security_xfrm_policy_alloc(&ctx, uctx);
1717 if (err)
6c5c8ca7 1718 return err;
2c8dd116 1719 }
fc34acd3 1720 xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx, 0, &err);
03e1ad7b 1721 security_xfrm_policy_free(ctx);
6c5c8ca7 1722 }
6c5c8ca7 1723 if (xp == NULL)
ef41aaa0 1724 return -ENOENT;
03e1ad7b 1725
ef41aaa0 1726 read_lock(&xp->lock);
12a169e7 1727 if (xp->walk.dead) {
6c5c8ca7
JHS		 1728 read_unlock(&xp->lock);
1729 goto out;
1730 }
1731
1732 read_unlock(&xp->lock);
1733 err = 0;
1734 if (up->hard) {
2532386f
EP		 1735 uid_t loginuid = NETLINK_CB(skb).loginuid;
1736 uid_t sessionid = NETLINK_CB(skb).sessionid;
1737 u32 sid = NETLINK_CB(skb).sid;
6c5c8ca7 1738 xfrm_policy_delete(xp, p->dir);
2532386f 1739 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
161a09e7 1740
6c5c8ca7
JHS		 1741 } else {
1742 // reset the timers here?
1743 printk("Dont know what to do with soft policy expire\n");
1744 }
1745 km_policy_expired(xp, p->dir, up->hard, current->pid);
1746
1747out:
1748 xfrm_pol_put(xp);
1749 return err;
1750}
1751
22e70050 1752static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1753 struct nlattr **attrs)
53bc6b4d 1754{
fc34acd3 1755 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 1756 struct xfrm_state *x;
1757 int err;
7b67c857 1758 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d
JHS		 1759 struct xfrm_usersa_info *p = &ue->state;
1760
fc34acd3 1761 x = xfrm_state_lookup(net, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1762
3a765aa5 1763 err = -ENOENT;
53bc6b4d
JHS		 1764 if (x == NULL)
1765 return err;
1766
53bc6b4d 1767 spin_lock_bh(&x->lock);
3a765aa5 1768 err = -EINVAL;
53bc6b4d
JHS		 1769 if (x->km.state != XFRM_STATE_VALID)
1770 goto out;
1771 km_state_expired(x, ue->hard, current->pid);
1772
161a09e7 1773 if (ue->hard) {
2532386f
EP		 1774 uid_t loginuid = NETLINK_CB(skb).loginuid;
1775 uid_t sessionid = NETLINK_CB(skb).sessionid;
1776 u32 sid = NETLINK_CB(skb).sid;
53bc6b4d 1777 __xfrm_state_delete(x);
2532386f 1778 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
161a09e7 1779 }
3a765aa5 1780 err = 0;
53bc6b4d
JHS		 1781out:
1782 spin_unlock_bh(&x->lock);
1783 xfrm_state_put(x);
1784 return err;
1785}
1786
22e70050 1787static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1788 struct nlattr **attrs)
980ebd25 1789{
fc34acd3 1790 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 1791 struct xfrm_policy *xp;
1792 struct xfrm_user_tmpl *ut;
1793 int i;
5424f32e 1794 struct nlattr *rt = attrs[XFRMA_TMPL];
980ebd25 1795
7b67c857 1796 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 1797 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 1798 int err = -ENOMEM;
1799
1800 if (!x)
d8eb9307 1801 goto nomem;
980ebd25
JHS		 1802
1803 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 1804 if (err)
1805 goto bad_policy;
980ebd25
JHS		 1806
1807 /* build an XP */
fc34acd3 1808 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 1809 if (!xp)
1810 goto free_state;
980ebd25
JHS		 1811
1812 memcpy(&x->id, &ua->id, sizeof(ua->id));
1813 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1814 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1815
5424f32e 1816 ut = nla_data(rt);
980ebd25
JHS		 1817 /* extract the templates and for each call km_key */
1818 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1819 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1820 memcpy(&x->id, &t->id, sizeof(x->id));
1821 x->props.mode = t->mode;
1822 x->props.reqid = t->reqid;
1823 x->props.family = ut->family;
1824 t->aalgos = ua->aalgos;
1825 t->ealgos = ua->ealgos;
1826 t->calgos = ua->calgos;
1827 err = km_query(x, t, xp);
1828
1829 }
1830
1831 kfree(x);
1832 kfree(xp);
1833
1834 return 0;
d8eb9307
IJ		 1835
1836bad_policy:
1837 printk("BAD policy passed\n");
1838free_state:
1839 kfree(x);
1840nomem:
1841 return err;
980ebd25
JHS		 1842}
1843
5c79de6e 1844#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 1845static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 1846 struct xfrm_kmaddress *k,
5424f32e 1847 struct nlattr **attrs, int *num)
5c79de6e 1848{
5424f32e 1849 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 1850 struct xfrm_user_migrate *um;
1851 int i, num_migrate;
1852
13c1d189
AE		 1853 if (k != NULL) {
1854 struct xfrm_user_kmaddress *uk;
1855
1856 uk = nla_data(attrs[XFRMA_KMADDRESS]);
1857 memcpy(&k->local, &uk->local, sizeof(k->local));
1858 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
1859 k->family = uk->family;
1860 k->reserved = uk->reserved;
1861 }
1862
5424f32e
TG		 1863 um = nla_data(rt);
1864 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 1865
1866 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1867 return -EINVAL;
1868
1869 for (i = 0; i < num_migrate; i++, um++, ma++) {
1870 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1871 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1872 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1873 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1874
1875 ma->proto = um->proto;
1876 ma->mode = um->mode;
1877 ma->reqid = um->reqid;
1878
1879 ma->old_family = um->old_family;
1880 ma->new_family = um->new_family;
1881 }
1882
1883 *num = i;
1884 return 0;
1885}
1886
1887static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1888 struct nlattr **attrs)
5c79de6e 1889{
7b67c857 1890 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 1891 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 1892 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 1893 u8 type;
1894 int err;
1895 int n = 0;
1896
35a7aa08 1897 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 1898 return -EINVAL;
5c79de6e 1899
13c1d189
AE		 1900 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
1901
5424f32e 1902 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 1903 if (err)
1904 return err;
1905
13c1d189 1906 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 1907 if (err)
1908 return err;
1909
1910 if (!n)
1911 return 0;
1912
13c1d189 1913 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
5c79de6e
SS		 1914
1915 return 0;
1916}
1917#else
1918static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1919 struct nlattr **attrs)
5c79de6e
SS		 1920{
1921 return -ENOPROTOOPT;
1922}
1923#endif
1924
1925#ifdef CONFIG_XFRM_MIGRATE
1926static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1927{
1928 struct xfrm_user_migrate um;
1929
1930 memset(&um, 0, sizeof(um));
1931 um.proto = m->proto;
1932 um.mode = m->mode;
1933 um.reqid = m->reqid;
1934 um.old_family = m->old_family;
1935 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1936 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1937 um.new_family = m->new_family;
1938 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1939 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1940
c0144bea 1941 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 1942}
1943
13c1d189
AE		 1944static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb)
1945{
1946 struct xfrm_user_kmaddress uk;
1947
1948 memset(&uk, 0, sizeof(uk));
1949 uk.family = k->family;
1950 uk.reserved = k->reserved;
1951 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 1952 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 1953
1954 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
1955}
1956
1957static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 1958{
1959 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 1960 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
1961 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1962 + userpolicy_type_attrsize();
7deb2264
TG		 1963}
1964
5c79de6e 1965static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
13c1d189
AE		 1966 int num_migrate, struct xfrm_kmaddress *k,
1967 struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e
SS		 1968{
1969 struct xfrm_migrate *mp;
1970 struct xfrm_userpolicy_id *pol_id;
1971 struct nlmsghdr *nlh;
5c79de6e
SS		 1972 int i;
1973
79b8b7f4
TG		 1974 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1975 if (nlh == NULL)
1976 return -EMSGSIZE;
5c79de6e 1977
7b67c857 1978 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 1979 /* copy data from selector, dir, and type to the pol_id */
1980 memset(pol_id, 0, sizeof(*pol_id));
1981 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1982 pol_id->dir = dir;
1983
13c1d189
AE		 1984 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
1985 goto nlmsg_failure;
1986
5c79de6e
SS		 1987 if (copy_to_user_policy_type(type, skb) < 0)
1988 goto nlmsg_failure;
1989
1990 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1991 if (copy_to_user_migrate(mp, skb) < 0)
1992 goto nlmsg_failure;
1993 }
1994
9825069d 1995 return nlmsg_end(skb, nlh);
5c79de6e 1996nlmsg_failure:
9825069d
TG		 1997 nlmsg_cancel(skb, nlh);
1998 return -EMSGSIZE;
5c79de6e
SS		 1999}
2000
2001static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 2002 struct xfrm_migrate *m, int num_migrate,
2003 struct xfrm_kmaddress *k)
5c79de6e 2004{
a6483b79 2005 struct net *net = &init_net;
5c79de6e 2006 struct sk_buff *skb;
5c79de6e 2007
13c1d189 2008 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2009 if (skb == NULL)
2010 return -ENOMEM;
2011
2012 /* build migrate */
13c1d189 2013 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2014 BUG();
2015
a6483b79 2016 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 2017}
2018#else
2019static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 2020 struct xfrm_migrate *m, int num_migrate,
2021 struct xfrm_kmaddress *k)
5c79de6e
SS		 2022{
2023 return -ENOPROTOOPT;
2024}
2025#endif
d51d081d 2026
a7bd9a45 2027#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2028
2029static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2030 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2031 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2032 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2033 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2034 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2035 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2036 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2037 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2038 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2039 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2040 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2041 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2042 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2043 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2044 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2045 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2046 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2047 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 2048 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2049 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2050};
2051
492b558b
TG		 2052#undef XMSGSIZE
2053
cf5cb79f 2054static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1a6509d9 2055 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2056 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2057 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2058 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2059 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2060 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2061 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2062 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2063 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2064 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2065 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2066 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2067 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2068 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2069 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2070 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
cf5cb79f
TG		 2071};
2072
1da177e4 2073static struct xfrm_link {
5424f32e 2074 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2075 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2076 int (*done)(struct netlink_callback *);
492b558b
TG		 2077} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2078 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2079 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2080 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2081 .dump = xfrm_dump_sa,
2082 .done = xfrm_dump_sa_done },
492b558b
TG		 2083 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2084 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2085 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2086 .dump = xfrm_dump_policy,
2087 .done = xfrm_dump_policy_done },
492b558b 2088 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2089 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2090 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2091 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2092 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2093 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2094 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2095 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2096 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2097 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2098 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2099 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 2100 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2101};
2102
1d00a4eb 2103static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2104{
a6483b79 2105 struct net *net = sock_net(skb->sk);
35a7aa08 2106 struct nlattr *attrs[XFRMA_MAX+1];
1da177e4 2107 struct xfrm_link *link;
a7bd9a45 2108 int type, err;
1da177e4 2109
1da177e4 2110 type = nlh->nlmsg_type;
1da177e4 2111 if (type > XFRM_MSG_MAX)
1d00a4eb 2112 return -EINVAL;
1da177e4
LT		 2113
2114 type -= XFRM_MSG_BASE;
2115 link = &xfrm_dispatch[type];
2116
2117 /* All operations require privileges, even GET */
1d00a4eb
TG		 2118 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2119 return -EPERM;
1da177e4 2120
492b558b
TG		 2121 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2122 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2123 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2124 if (link->dump == NULL)
1d00a4eb 2125 return -EINVAL;
88fc2c84 2126
a6483b79 2127 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
1da177e4
LT		 2128 }
2129
35a7aa08 2130 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2131 xfrma_policy);
a7bd9a45
TG		 2132 if (err < 0)
2133 return err;
1da177e4
LT		 2134
2135 if (link->doit == NULL)
1d00a4eb 2136 return -EINVAL;
1da177e4 2137
5424f32e 2138 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2139}
2140
cd40b7d3 2141static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2142{
cd40b7d3
DL		 2143 mutex_lock(&xfrm_cfg_mutex);
2144 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2145 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 2146}
2147
7deb2264
TG		 2148static inline size_t xfrm_expire_msgsize(void)
2149{
2150 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
2151}
2152
d51d081d 2153static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2154{
2155 struct xfrm_user_expire *ue;
2156 struct nlmsghdr *nlh;
1da177e4 2157
79b8b7f4
TG		 2158 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2159 if (nlh == NULL)
2160 return -EMSGSIZE;
1da177e4 2161
7b67c857 2162 ue = nlmsg_data(nlh);
1da177e4 2163 copy_to_user_state(x, &ue->state);
d51d081d 2164 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2165
9825069d 2166 return nlmsg_end(skb, nlh);
1da177e4
LT		 2167}
2168
26b15dad 2169static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1da177e4 2170{
fc34acd3 2171 struct net *net = xs_net(x);
1da177e4
LT		 2172 struct sk_buff *skb;
2173
7deb2264 2174 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2175 if (skb == NULL)
2176 return -ENOMEM;
2177
d51d081d 2178 if (build_expire(skb, x, c) < 0)
1da177e4
LT		 2179 BUG();
2180
a6483b79 2181 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2182}
2183
d51d081d
JHS		 2184static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2185{
fc34acd3 2186 struct net *net = xs_net(x);
d51d081d 2187 struct sk_buff *skb;
d51d081d 2188
7deb2264 2189 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 2190 if (skb == NULL)
2191 return -ENOMEM;
2192
2193 if (build_aevent(skb, x, c) < 0)
2194 BUG();
2195
a6483b79 2196 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2197}
2198
26b15dad
JHS		 2199static int xfrm_notify_sa_flush(struct km_event *c)
2200{
7067802e 2201 struct net *net = c->net;
26b15dad
JHS		 2202 struct xfrm_usersa_flush *p;
2203 struct nlmsghdr *nlh;
2204 struct sk_buff *skb;
7deb2264 2205 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2206
7deb2264 2207 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2208 if (skb == NULL)
2209 return -ENOMEM;
26b15dad 2210
79b8b7f4
TG		 2211 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2212 if (nlh == NULL) {
2213 kfree_skb(skb);
2214 return -EMSGSIZE;
2215 }
26b15dad 2216
7b67c857 2217 p = nlmsg_data(nlh);
bf08867f 2218 p->proto = c->data.proto;
26b15dad 2219
9825069d 2220 nlmsg_end(skb, nlh);
26b15dad 2221
a6483b79 2222 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2223}
2224
7deb2264 2225static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2226{
7deb2264 2227 size_t l = 0;
1a6509d9
HX		 2228 if (x->aead)
2229 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2230 if (x->aalg) {
2231 l += nla_total_size(sizeof(struct xfrm_algo) +
2232 (x->aalg->alg_key_len + 7) / 8);
2233 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2234 }
26b15dad 2235 if (x->ealg)
0f99be0d 2236 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2237 if (x->calg)
7deb2264 2238 l += nla_total_size(sizeof(*x->calg));
26b15dad 2239 if (x->encap)
7deb2264 2240 l += nla_total_size(sizeof(*x->encap));
68325d3b
HX		 2241 if (x->security)
2242 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2243 x->security->ctx_len);
2244 if (x->coaddr)
2245 l += nla_total_size(sizeof(*x->coaddr));
2246
d26f3984
HX		 2247 /* Must count x->lastused as it may become non-zero behind our back. */
2248 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2249
2250 return l;
2251}
2252
2253static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2254{
fc34acd3 2255 struct net *net = xs_net(x);
26b15dad 2256 struct xfrm_usersa_info *p;
0603eac0 2257 struct xfrm_usersa_id *id;
26b15dad
JHS		 2258 struct nlmsghdr *nlh;
2259 struct sk_buff *skb;
26b15dad 2260 int len = xfrm_sa_len(x);
0603eac0
HX		 2261 int headlen;
2262
2263 headlen = sizeof(*p);
2264 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2265 len += nla_total_size(headlen);
0603eac0
HX		 2266 headlen = sizeof(*id);
2267 }
7deb2264 2268 len += NLMSG_ALIGN(headlen);
26b15dad 2269
7deb2264 2270 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2271 if (skb == NULL)
2272 return -ENOMEM;
26b15dad 2273
79b8b7f4
TG		 2274 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2275 if (nlh == NULL)
c0144bea 2276 goto nla_put_failure;
26b15dad 2277
7b67c857 2278 p = nlmsg_data(nlh);
0603eac0 2279 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2280 struct nlattr *attr;
2281
7b67c857 2282 id = nlmsg_data(nlh);
0603eac0
HX		 2283 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2284 id->spi = x->id.spi;
2285 id->family = x->props.family;
2286 id->proto = x->id.proto;
2287
c0144bea
TG		 2288 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2289 if (attr == NULL)
2290 goto nla_put_failure;
2291
2292 p = nla_data(attr);
0603eac0
HX		 2293 }
2294
68325d3b
HX		 2295 if (copy_to_user_state_extra(x, p, skb))
2296 goto nla_put_failure;
26b15dad 2297
9825069d 2298 nlmsg_end(skb, nlh);
26b15dad 2299
a6483b79 2300 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2301
c0144bea 2302nla_put_failure:
68325d3b
HX		 2303 /* Somebody screwed up with xfrm_sa_len! */
2304 WARN_ON(1);
26b15dad
JHS		 2305 kfree_skb(skb);
2306 return -1;
2307}
2308
2309static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2310{
2311
2312 switch (c->event) {
f60f6b8f 2313 case XFRM_MSG_EXPIRE:
26b15dad 2314 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2315 case XFRM_MSG_NEWAE:
2316 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2317 case XFRM_MSG_DELSA:
2318 case XFRM_MSG_UPDSA:
2319 case XFRM_MSG_NEWSA:
26b15dad 2320 return xfrm_notify_sa(x, c);
f60f6b8f 2321 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2322 return xfrm_notify_sa_flush(c);
2323 default:
2324 printk("xfrm_user: Unknown SA event %d\n", c->event);
2325 break;
2326 }
2327
2328 return 0;
2329
2330}
2331
7deb2264
TG		 2332static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2333 struct xfrm_policy *xp)
2334{
2335 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2336 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2337 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2338 + userpolicy_type_attrsize();
2339}
2340
1da177e4
LT		 2341static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2342 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2343 int dir)
2344{
2345 struct xfrm_user_acquire *ua;
2346 struct nlmsghdr *nlh;
1da177e4
LT		 2347 __u32 seq = xfrm_get_acqseq();
2348
79b8b7f4
TG		 2349 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2350 if (nlh == NULL)
2351 return -EMSGSIZE;
1da177e4 2352
7b67c857 2353 ua = nlmsg_data(nlh);
1da177e4
LT		 2354 memcpy(&ua->id, &x->id, sizeof(ua->id));
2355 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2356 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2357 copy_to_user_policy(xp, &ua->policy, dir);
2358 ua->aalgos = xt->aalgos;
2359 ua->ealgos = xt->ealgos;
2360 ua->calgos = xt->calgos;
2361 ua->seq = x->km.seq = seq;
2362
2363 if (copy_to_user_tmpl(xp, skb) < 0)
2364 goto nlmsg_failure;
0d681623 2365 if (copy_to_user_state_sec_ctx(x, skb))
df71837d 2366 goto nlmsg_failure;
1459bb36 2367 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2368 goto nlmsg_failure;
1da177e4 2369
9825069d 2370 return nlmsg_end(skb, nlh);
1da177e4
LT		 2371
2372nlmsg_failure:
9825069d
TG		 2373 nlmsg_cancel(skb, nlh);
2374 return -EMSGSIZE;
1da177e4
LT		 2375}
2376
2377static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2378 struct xfrm_policy *xp, int dir)
2379{
a6483b79 2380 struct net *net = xs_net(x);
1da177e4 2381 struct sk_buff *skb;
1da177e4 2382
7deb2264 2383 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2384 if (skb == NULL)
2385 return -ENOMEM;
2386
2387 if (build_acquire(skb, x, xt, xp, dir) < 0)
2388 BUG();
2389
a6483b79 2390 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2391}
2392
2393/* User gives us xfrm_user_policy_info followed by an array of 0
2394 * or more templates.
2395 */
cb969f07 2396static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2397 u8 *data, int len, int *dir)
2398{
fc34acd3 2399 struct net *net = sock_net(sk);
1da177e4
LT		 2400 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2401 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2402 struct xfrm_policy *xp;
2403 int nr;
2404
cb969f07 2405 switch (sk->sk_family) {
1da177e4
LT		 2406 case AF_INET:
2407 if (opt != IP_XFRM_POLICY) {
2408 *dir = -EOPNOTSUPP;
2409 return NULL;
2410 }
2411 break;
2412#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2413 case AF_INET6:
2414 if (opt != IPV6_XFRM_POLICY) {
2415 *dir = -EOPNOTSUPP;
2416 return NULL;
2417 }
2418 break;
2419#endif
2420 default:
2421 *dir = -EINVAL;
2422 return NULL;
2423 }
2424
2425 *dir = -EINVAL;
2426
2427 if (len < sizeof(*p) ||
2428 verify_newpolicy_info(p))
2429 return NULL;
2430
2431 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2432 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2433 return NULL;
2434
a4f1bac6
HX		 2435 if (p->dir > XFRM_POLICY_OUT)
2436 return NULL;
2437
fc34acd3 2438 xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 2439 if (xp == NULL) {
2440 *dir = -ENOBUFS;
2441 return NULL;
2442 }
2443
2444 copy_from_user_policy(xp, p);
f7b6983f 2445 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2446 copy_templates(xp, ut, nr);
2447
2448 *dir = p->dir;
2449
2450 return xp;
2451}
2452
7deb2264
TG		 2453static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2454{
2455 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2456 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2457 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2458 + userpolicy_type_attrsize();
2459}
2460
1da177e4 2461static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
d51d081d 2462 int dir, struct km_event *c)
1da177e4
LT		 2463{
2464 struct xfrm_user_polexpire *upe;
2465 struct nlmsghdr *nlh;
d51d081d 2466 int hard = c->data.hard;
1da177e4 2467
79b8b7f4
TG		 2468 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2469 if (nlh == NULL)
2470 return -EMSGSIZE;
1da177e4 2471
7b67c857 2472 upe = nlmsg_data(nlh);
1da177e4
LT		 2473 copy_to_user_policy(xp, &upe->pol, dir);
2474 if (copy_to_user_tmpl(xp, skb) < 0)
2475 goto nlmsg_failure;
df71837d
TJ		 2476 if (copy_to_user_sec_ctx(xp, skb))
2477 goto nlmsg_failure;
1459bb36 2478 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2479 goto nlmsg_failure;
1da177e4
LT		 2480 upe->hard = !!hard;
2481
9825069d 2482 return nlmsg_end(skb, nlh);
1da177e4
LT		 2483
2484nlmsg_failure:
9825069d
TG		 2485 nlmsg_cancel(skb, nlh);
2486 return -EMSGSIZE;
1da177e4
LT		 2487}
2488
26b15dad 2489static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4 2490{
fc34acd3 2491 struct net *net = xp_net(xp);
1da177e4 2492 struct sk_buff *skb;
1da177e4 2493
7deb2264 2494 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2495 if (skb == NULL)
2496 return -ENOMEM;
2497
d51d081d 2498 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2499 BUG();
2500
a6483b79 2501 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2502}
2503
26b15dad
JHS		 2504static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2505{
fc34acd3 2506 struct net *net = xp_net(xp);
26b15dad 2507 struct xfrm_userpolicy_info *p;
0603eac0 2508 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2509 struct nlmsghdr *nlh;
2510 struct sk_buff *skb;
7deb2264 2511 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
0603eac0
HX		 2512 int headlen;
2513
2514 headlen = sizeof(*p);
2515 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2516 len += nla_total_size(headlen);
0603eac0
HX		 2517 headlen = sizeof(*id);
2518 }
cfbfd45a 2519 len += userpolicy_type_attrsize();
7deb2264 2520 len += NLMSG_ALIGN(headlen);
26b15dad 2521
7deb2264 2522 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2523 if (skb == NULL)
2524 return -ENOMEM;
26b15dad 2525
79b8b7f4
TG		 2526 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2527 if (nlh == NULL)
2528 goto nlmsg_failure;
26b15dad 2529
7b67c857 2530 p = nlmsg_data(nlh);
0603eac0 2531 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2532 struct nlattr *attr;
2533
7b67c857 2534 id = nlmsg_data(nlh);
0603eac0
HX		 2535 memset(id, 0, sizeof(*id));
2536 id->dir = dir;
2537 if (c->data.byid)
2538 id->index = xp->index;
2539 else
2540 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2541
c0144bea
TG		 2542 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2543 if (attr == NULL)
2544 goto nlmsg_failure;
2545
2546 p = nla_data(attr);
0603eac0 2547 }
26b15dad 2548
26b15dad
JHS		 2549 copy_to_user_policy(xp, p, dir);
2550 if (copy_to_user_tmpl(xp, skb) < 0)
2551 goto nlmsg_failure;
1459bb36 2552 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2553 goto nlmsg_failure;
26b15dad 2554
9825069d 2555 nlmsg_end(skb, nlh);
26b15dad 2556
a6483b79 2557 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2558
2559nlmsg_failure:
2560 kfree_skb(skb);
2561 return -1;
2562}
2563
2564static int xfrm_notify_policy_flush(struct km_event *c)
2565{
7067802e 2566 struct net *net = c->net;
26b15dad
JHS		 2567 struct nlmsghdr *nlh;
2568 struct sk_buff *skb;
26b15dad 2569
7deb2264 2570 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2571 if (skb == NULL)
2572 return -ENOMEM;
26b15dad 2573
79b8b7f4
TG		 2574 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2575 if (nlh == NULL)
2576 goto nlmsg_failure;
0c51f53c
JHS		 2577 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2578 goto nlmsg_failure;
26b15dad 2579
9825069d 2580 nlmsg_end(skb, nlh);
26b15dad 2581
a6483b79 2582 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2583
2584nlmsg_failure:
2585 kfree_skb(skb);
2586 return -1;
2587}
2588
2589static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2590{
2591
2592 switch (c->event) {
f60f6b8f
HX		 2593 case XFRM_MSG_NEWPOLICY:
2594 case XFRM_MSG_UPDPOLICY:
2595 case XFRM_MSG_DELPOLICY:
26b15dad 2596 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2597 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2598 return xfrm_notify_policy_flush(c);
f60f6b8f 2599 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2600 return xfrm_exp_policy_notify(xp, dir, c);
2601 default:
2602 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2603 }
2604
2605 return 0;
2606
2607}
2608
7deb2264
TG		 2609static inline size_t xfrm_report_msgsize(void)
2610{
2611 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2612}
2613
97a64b45
MN		 2614static int build_report(struct sk_buff *skb, u8 proto,
2615 struct xfrm_selector *sel, xfrm_address_t *addr)
2616{
2617 struct xfrm_user_report *ur;
2618 struct nlmsghdr *nlh;
97a64b45 2619
79b8b7f4
TG		 2620 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2621 if (nlh == NULL)
2622 return -EMSGSIZE;
97a64b45 2623
7b67c857 2624 ur = nlmsg_data(nlh);
97a64b45
MN		 2625 ur->proto = proto;
2626 memcpy(&ur->sel, sel, sizeof(ur->sel));
2627
2628 if (addr)
c0144bea 2629 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
97a64b45 2630
9825069d 2631 return nlmsg_end(skb, nlh);
97a64b45 2632
c0144bea 2633nla_put_failure:
9825069d
TG		 2634 nlmsg_cancel(skb, nlh);
2635 return -EMSGSIZE;
97a64b45
MN		 2636}
2637
db983c11
AD		 2638static int xfrm_send_report(struct net *net, u8 proto,
2639 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2640{
2641 struct sk_buff *skb;
97a64b45 2642
7deb2264 2643 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2644 if (skb == NULL)
2645 return -ENOMEM;
2646
2647 if (build_report(skb, proto, sel, addr) < 0)
2648 BUG();
2649
a6483b79 2650 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2651}
2652
3a2dfbe8
MW		 2653static inline size_t xfrm_mapping_msgsize(void)
2654{
2655 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2656}
2657
2658static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2659 xfrm_address_t *new_saddr, __be16 new_sport)
2660{
2661 struct xfrm_user_mapping *um;
2662 struct nlmsghdr *nlh;
2663
2664 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2665 if (nlh == NULL)
2666 return -EMSGSIZE;
2667
2668 um = nlmsg_data(nlh);
2669
2670 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2671 um->id.spi = x->id.spi;
2672 um->id.family = x->props.family;
2673 um->id.proto = x->id.proto;
2674 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2675 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2676 um->new_sport = new_sport;
2677 um->old_sport = x->encap->encap_sport;
2678 um->reqid = x->props.reqid;
2679
2680 return nlmsg_end(skb, nlh);
2681}
2682
2683static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2684 __be16 sport)
2685{
a6483b79 2686 struct net *net = xs_net(x);
3a2dfbe8
MW		 2687 struct sk_buff *skb;
2688
2689 if (x->id.proto != IPPROTO_ESP)
2690 return -EINVAL;
2691
2692 if (!x->encap)
2693 return -EINVAL;
2694
2695 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2696 if (skb == NULL)
2697 return -ENOMEM;
2698
2699 if (build_mapping(skb, x, ipaddr, sport) < 0)
2700 BUG();
2701
a6483b79 2702 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2703}
2704
1da177e4
LT		 2705static struct xfrm_mgr netlink_mgr = {
2706 .id = "netlink",
2707 .notify = xfrm_send_state_notify,
2708 .acquire = xfrm_send_acquire,
2709 .compile_policy = xfrm_compile_policy,
2710 .notify_policy = xfrm_send_policy_notify,
97a64b45 2711 .report = xfrm_send_report,
5c79de6e 2712 .migrate = xfrm_send_migrate,
3a2dfbe8 2713 .new_mapping = xfrm_send_mapping,
1da177e4
LT		 2714};
2715
a6483b79 2716static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 2717{
be33690d
PM		 2718 struct sock *nlsk;
2719
a6483b79 2720 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
af65bdfc 2721 xfrm_netlink_rcv, NULL, THIS_MODULE);
be33690d 2722 if (nlsk == NULL)
1da177e4 2723 return -ENOMEM;
d79d792e 2724 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
a6483b79 2725 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 2726 return 0;
2727}
2728
d79d792e 2729static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 2730{
d79d792e
EB		 2731 struct net *net;
2732 list_for_each_entry(net, net_exit_list, exit_list)
2733 rcu_assign_pointer(net->xfrm.nlsk, NULL);
2734 synchronize_net();
2735 list_for_each_entry(net, net_exit_list, exit_list)
2736 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 2737}
2738
a6483b79 2739static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 2740 .init = xfrm_user_net_init,
2741 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 2742};
2743
2744static int __init xfrm_user_init(void)
2745{
2746 int rv;
2747
2748 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2749
2750 rv = register_pernet_subsys(&xfrm_user_net_ops);
2751 if (rv < 0)
2752 return rv;
2753 rv = xfrm_register_km(&netlink_mgr);
2754 if (rv < 0)
2755 unregister_pernet_subsys(&xfrm_user_net_ops);
2756 return rv;
2757}
2758
2759static void __exit xfrm_user_exit(void)
2760{
2761 xfrm_unregister_km(&netlink_mgr);
2762 unregister_pernet_subsys(&xfrm_user_net_ops);
2763}
2764
1da177e4
LT		 2765module_init(xfrm_user_init);
2766module_exit(xfrm_user_exit);
2767MODULE_LICENSE("GPL");
4fdb3bb7 2768MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 2769
Linux kernel - Deliverables
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