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SiS190/191 half-duplex initialization fix
[linux-2.6-block.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
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
e071041b
AD		 784static int build_spdinfo(struct sk_buff *skb, struct net *net,
785 u32 pid, u32 seq, u32 flags)
ecfd6b18 786{
5a6d3416
JHS		 787 struct xfrmk_spdinfo si;
788 struct xfrmu_spdinfo spc;
789 struct xfrmu_spdhinfo sph;
ecfd6b18
JHS		 790 struct nlmsghdr *nlh;
791 u32 *f;
792
793 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
794 if (nlh == NULL) /* shouldnt really happen ... */
795 return -EMSGSIZE;
796
797 f = nlmsg_data(nlh);
798 *f = flags;
e071041b 799 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 800 spc.incnt = si.incnt;
801 spc.outcnt = si.outcnt;
802 spc.fwdcnt = si.fwdcnt;
803 spc.inscnt = si.inscnt;
804 spc.outscnt = si.outscnt;
805 spc.fwdscnt = si.fwdscnt;
806 sph.spdhcnt = si.spdhcnt;
807 sph.spdhmcnt = si.spdhmcnt;
808
809 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
810 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
ecfd6b18
JHS		 811
812 return nlmsg_end(skb, nlh);
813
814nla_put_failure:
815 nlmsg_cancel(skb, nlh);
816 return -EMSGSIZE;
817}
818
819static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 820 struct nlattr **attrs)
ecfd6b18 821{
a6483b79 822 struct net *net = sock_net(skb->sk);
ecfd6b18 823 struct sk_buff *r_skb;
7b67c857 824 u32 *flags = nlmsg_data(nlh);
ecfd6b18
JHS		 825 u32 spid = NETLINK_CB(skb).pid;
826 u32 seq = nlh->nlmsg_seq;
ecfd6b18 827
7deb2264 828 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 829 if (r_skb == NULL)
830 return -ENOMEM;
831
e071041b 832 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
ecfd6b18
JHS		 833 BUG();
834
a6483b79 835 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
ecfd6b18
JHS		 836}
837
7deb2264
TG		 838static inline size_t xfrm_sadinfo_msgsize(void)
839{
840 return NLMSG_ALIGN(4)
841 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
842 + nla_total_size(4); /* XFRMA_SAD_CNT */
843}
844
e071041b
AD		 845static int build_sadinfo(struct sk_buff *skb, struct net *net,
846 u32 pid, u32 seq, u32 flags)
28d8909b 847{
af11e316
JHS		 848 struct xfrmk_sadinfo si;
849 struct xfrmu_sadhinfo sh;
28d8909b
JHS		 850 struct nlmsghdr *nlh;
851 u32 *f;
852
853 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
854 if (nlh == NULL) /* shouldnt really happen ... */
855 return -EMSGSIZE;
856
857 f = nlmsg_data(nlh);
858 *f = flags;
e071041b 859 xfrm_sad_getinfo(net, &si);
28d8909b 860
af11e316
JHS		 861 sh.sadhmcnt = si.sadhmcnt;
862 sh.sadhcnt = si.sadhcnt;
863
864 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
865 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
28d8909b
JHS		 866
867 return nlmsg_end(skb, nlh);
868
869nla_put_failure:
870 nlmsg_cancel(skb, nlh);
871 return -EMSGSIZE;
872}
873
874static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 875 struct nlattr **attrs)
28d8909b 876{
a6483b79 877 struct net *net = sock_net(skb->sk);
28d8909b 878 struct sk_buff *r_skb;
7b67c857 879 u32 *flags = nlmsg_data(nlh);
28d8909b
JHS		 880 u32 spid = NETLINK_CB(skb).pid;
881 u32 seq = nlh->nlmsg_seq;
28d8909b 882
7deb2264 883 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 884 if (r_skb == NULL)
885 return -ENOMEM;
886
e071041b 887 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
28d8909b
JHS		 888 BUG();
889
a6483b79 890 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
28d8909b
JHS		 891}
892
22e70050 893static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 894 struct nlattr **attrs)
1da177e4 895{
fc34acd3 896 struct net *net = sock_net(skb->sk);
7b67c857 897 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 898 struct xfrm_state *x;
899 struct sk_buff *resp_skb;
eb2971b6 900 int err = -ESRCH;
1da177e4 901
fc34acd3 902 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 903 if (x == NULL)
904 goto out_noput;
905
906 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
907 if (IS_ERR(resp_skb)) {
908 err = PTR_ERR(resp_skb);
909 } else {
a6483b79 910 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 911 }
912 xfrm_state_put(x);
913out_noput:
914 return err;
915}
916
917static int verify_userspi_info(struct xfrm_userspi_info *p)
918{
919 switch (p->info.id.proto) {
920 case IPPROTO_AH:
921 case IPPROTO_ESP:
922 break;
923
924 case IPPROTO_COMP:
925 /* IPCOMP spi is 16-bits. */
926 if (p->max >= 0x10000)
927 return -EINVAL;
928 break;
929
930 default:
931 return -EINVAL;
3ff50b79 932 }
1da177e4
LT		 933
934 if (p->min > p->max)
935 return -EINVAL;
936
937 return 0;
938}
939
22e70050 940static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 941 struct nlattr **attrs)
1da177e4 942{
fc34acd3 943 struct net *net = sock_net(skb->sk);
1da177e4
LT		 944 struct xfrm_state *x;
945 struct xfrm_userspi_info *p;
946 struct sk_buff *resp_skb;
947 xfrm_address_t *daddr;
948 int family;
949 int err;
950
7b67c857 951 p = nlmsg_data(nlh);
1da177e4
LT		 952 err = verify_userspi_info(p);
953 if (err)
954 goto out_noput;
955
956 family = p->info.family;
957 daddr = &p->info.id.daddr;
958
959 x = NULL;
960 if (p->info.seq) {
a6483b79 961 x = xfrm_find_acq_byseq(net, p->info.seq);
1da177e4
LT		 962 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
963 xfrm_state_put(x);
964 x = NULL;
965 }
966 }
967
968 if (!x)
a6483b79 969 x = xfrm_find_acq(net, p->info.mode, p->info.reqid,
1da177e4
LT		 970 p->info.id.proto, daddr,
971 &p->info.saddr, 1,
972 family);
973 err = -ENOENT;
974 if (x == NULL)
975 goto out_noput;
976
658b219e
HX		 977 err = xfrm_alloc_spi(x, p->min, p->max);
978 if (err)
979 goto out;
1da177e4 980
658b219e 981 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 982 if (IS_ERR(resp_skb)) {
983 err = PTR_ERR(resp_skb);
984 goto out;
985 }
986
a6483b79 987 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 988
989out:
990 xfrm_state_put(x);
991out_noput:
992 return err;
993}
994
b798a9ed 995static int verify_policy_dir(u8 dir)
1da177e4
LT		 996{
997 switch (dir) {
998 case XFRM_POLICY_IN:
999 case XFRM_POLICY_OUT:
1000 case XFRM_POLICY_FWD:
1001 break;
1002
1003 default:
1004 return -EINVAL;
3ff50b79 1005 }
1da177e4
LT		 1006
1007 return 0;
1008}
1009
b798a9ed 1010static int verify_policy_type(u8 type)
f7b6983f
MN		 1011{
1012 switch (type) {
1013 case XFRM_POLICY_TYPE_MAIN:
1014#ifdef CONFIG_XFRM_SUB_POLICY
1015 case XFRM_POLICY_TYPE_SUB:
1016#endif
1017 break;
1018
1019 default:
1020 return -EINVAL;
3ff50b79 1021 }
f7b6983f
MN		 1022
1023 return 0;
1024}
1025
1da177e4
LT		 1026static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1027{
1028 switch (p->share) {
1029 case XFRM_SHARE_ANY:
1030 case XFRM_SHARE_SESSION:
1031 case XFRM_SHARE_USER:
1032 case XFRM_SHARE_UNIQUE:
1033 break;
1034
1035 default:
1036 return -EINVAL;
3ff50b79 1037 }
1da177e4
LT		 1038
1039 switch (p->action) {
1040 case XFRM_POLICY_ALLOW:
1041 case XFRM_POLICY_BLOCK:
1042 break;
1043
1044 default:
1045 return -EINVAL;
3ff50b79 1046 }
1da177e4
LT		 1047
1048 switch (p->sel.family) {
1049 case AF_INET:
1050 break;
1051
1052 case AF_INET6:
1053#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1054 break;
1055#else
1056 return -EAFNOSUPPORT;
1057#endif
1058
1059 default:
1060 return -EINVAL;
3ff50b79 1061 }
1da177e4
LT		 1062
1063 return verify_policy_dir(p->dir);
1064}
1065
5424f32e 1066static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1067{
5424f32e 1068 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1069 struct xfrm_user_sec_ctx *uctx;
1070
1071 if (!rt)
1072 return 0;
1073
5424f32e 1074 uctx = nla_data(rt);
03e1ad7b 1075 return security_xfrm_policy_alloc(&pol->security, uctx);
df71837d
TJ		 1076}
1077
1da177e4
LT		 1078static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1079 int nr)
1080{
1081 int i;
1082
1083 xp->xfrm_nr = nr;
1084 for (i = 0; i < nr; i++, ut++) {
1085 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1086
1087 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1088 memcpy(&t->saddr, &ut->saddr,
1089 sizeof(xfrm_address_t));
1090 t->reqid = ut->reqid;
1091 t->mode = ut->mode;
1092 t->share = ut->share;
1093 t->optional = ut->optional;
1094 t->aalgos = ut->aalgos;
1095 t->ealgos = ut->ealgos;
1096 t->calgos = ut->calgos;
c5d18e98
HX		 1097 /* If all masks are ~0, then we allow all algorithms. */
1098 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1099 t->encap_family = ut->family;
1da177e4
LT		 1100 }
1101}
1102
b4ad86bf
DM		 1103static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1104{
1105 int i;
1106
1107 if (nr > XFRM_MAX_DEPTH)
1108 return -EINVAL;
1109
1110 for (i = 0; i < nr; i++) {
1111 /* We never validated the ut->family value, so many
1112 * applications simply leave it at zero. The check was
1113 * never made and ut->family was ignored because all
1114 * templates could be assumed to have the same family as
1115 * the policy itself. Now that we will have ipv4-in-ipv6
1116 * and ipv6-in-ipv4 tunnels, this is no longer true.
1117 */
1118 if (!ut[i].family)
1119 ut[i].family = family;
1120
1121 switch (ut[i].family) {
1122 case AF_INET:
1123 break;
1124#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1125 case AF_INET6:
1126 break;
1127#endif
1128 default:
1129 return -EINVAL;
3ff50b79 1130 }
b4ad86bf
DM		 1131 }
1132
1133 return 0;
1134}
1135
5424f32e 1136static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1137{
5424f32e 1138 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1139
1140 if (!rt) {
1141 pol->xfrm_nr = 0;
1142 } else {
5424f32e
TG		 1143 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1144 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1145 int err;
1da177e4 1146
b4ad86bf
DM		 1147 err = validate_tmpl(nr, utmpl, pol->family);
1148 if (err)
1149 return err;
1da177e4 1150
5424f32e 1151 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1152 }
1153 return 0;
1154}
1155
5424f32e 1156static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1157{
5424f32e 1158 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1159 struct xfrm_userpolicy_type *upt;
b798a9ed 1160 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1161 int err;
1162
1163 if (rt) {
5424f32e 1164 upt = nla_data(rt);
f7b6983f
MN		 1165 type = upt->type;
1166 }
1167
1168 err = verify_policy_type(type);
1169 if (err)
1170 return err;
1171
1172 *tp = type;
1173 return 0;
1174}
1175
1da177e4
LT		 1176static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1177{
1178 xp->priority = p->priority;
1179 xp->index = p->index;
1180 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1181 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1182 xp->action = p->action;
1183 xp->flags = p->flags;
1184 xp->family = p->sel.family;
1185 /* XXX xp->share = p->share; */
1186}
1187
1188static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1189{
1190 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1191 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1192 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1193 p->priority = xp->priority;
1194 p->index = xp->index;
1195 p->sel.family = xp->family;
1196 p->dir = dir;
1197 p->action = xp->action;
1198 p->flags = xp->flags;
1199 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1200}
1201
fc34acd3 1202static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1203{
fc34acd3 1204 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1205 int err;
1206
1207 if (!xp) {
1208 *errp = -ENOMEM;
1209 return NULL;
1210 }
1211
1212 copy_from_user_policy(xp, p);
df71837d 1213
35a7aa08 1214 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1215 if (err)
1216 goto error;
1217
35a7aa08
TG		 1218 if (!(err = copy_from_user_tmpl(xp, attrs)))
1219 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1220 if (err)
1221 goto error;
1da177e4
LT		 1222
1223 return xp;
f7b6983f
MN		 1224 error:
1225 *errp = err;
12a169e7 1226 xp->walk.dead = 1;
64c31b3f 1227 xfrm_policy_destroy(xp);
f7b6983f 1228 return NULL;
1da177e4
LT		 1229}
1230
22e70050 1231static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1232 struct nlattr **attrs)
1da177e4 1233{
fc34acd3 1234 struct net *net = sock_net(skb->sk);
7b67c857 1235 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1236 struct xfrm_policy *xp;
26b15dad 1237 struct km_event c;
1da177e4
LT		 1238 int err;
1239 int excl;
2532386f
EP		 1240 uid_t loginuid = NETLINK_CB(skb).loginuid;
1241 u32 sessionid = NETLINK_CB(skb).sessionid;
1242 u32 sid = NETLINK_CB(skb).sid;
1da177e4
LT		 1243
1244 err = verify_newpolicy_info(p);
df71837d
TJ		 1245 if (err)
1246 return err;
35a7aa08 1247 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1248 if (err)
1249 return err;
1250
fc34acd3 1251 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1252 if (!xp)
1253 return err;
1254
26b15dad
JHS		 1255 /* shouldnt excl be based on nlh flags??
1256 * Aha! this is anti-netlink really i.e more pfkey derived
1257 * in netlink excl is a flag and you wouldnt need
1258 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1259 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1260 err = xfrm_policy_insert(p->dir, xp, excl);
2532386f 1261 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 1262
1da177e4 1263 if (err) {
03e1ad7b 1264 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1265 kfree(xp);
1266 return err;
1267 }
1268
f60f6b8f 1269 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1270 c.seq = nlh->nlmsg_seq;
1271 c.pid = nlh->nlmsg_pid;
1272 km_policy_notify(xp, p->dir, &c);
1273
1da177e4
LT		 1274 xfrm_pol_put(xp);
1275
1276 return 0;
1277}
1278
1279static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1280{
1281 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1282 int i;
1283
1284 if (xp->xfrm_nr == 0)
1285 return 0;
1286
1287 for (i = 0; i < xp->xfrm_nr; i++) {
1288 struct xfrm_user_tmpl *up = &vec[i];
1289 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1290
1291 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1292 up->family = kp->encap_family;
1da177e4
LT		 1293 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1294 up->reqid = kp->reqid;
1295 up->mode = kp->mode;
1296 up->share = kp->share;
1297 up->optional = kp->optional;
1298 up->aalgos = kp->aalgos;
1299 up->ealgos = kp->ealgos;
1300 up->calgos = kp->calgos;
1301 }
df71837d 1302
c0144bea
TG		 1303 return nla_put(skb, XFRMA_TMPL,
1304 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1305}
1306
1307static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1308{
1309 if (x->security) {
1310 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1311 }
1312 return 0;
0d681623 1313}
df71837d 1314
0d681623
SH		 1315static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1316{
1317 if (xp->security) {
1318 return copy_sec_ctx(xp->security, skb);
1319 }
1320 return 0;
df71837d 1321}
cfbfd45a
TG		 1322static inline size_t userpolicy_type_attrsize(void)
1323{
1324#ifdef CONFIG_XFRM_SUB_POLICY
1325 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1326#else
1327 return 0;
1328#endif
1329}
df71837d 1330
f7b6983f 1331#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1332static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1333{
c0144bea
TG		 1334 struct xfrm_userpolicy_type upt = {
1335 .type = type,
1336 };
f7b6983f 1337
c0144bea 1338 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1339}
1340
1341#else
b798a9ed 1342static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1343{
1344 return 0;
1345}
1346#endif
1347
1da177e4
LT		 1348static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1349{
1350 struct xfrm_dump_info *sp = ptr;
1351 struct xfrm_userpolicy_info *p;
1352 struct sk_buff *in_skb = sp->in_skb;
1353 struct sk_buff *skb = sp->out_skb;
1354 struct nlmsghdr *nlh;
1da177e4 1355
79b8b7f4
TG		 1356 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1357 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1358 if (nlh == NULL)
1359 return -EMSGSIZE;
1da177e4 1360
7b67c857 1361 p = nlmsg_data(nlh);
1da177e4
LT		 1362 copy_to_user_policy(xp, p, dir);
1363 if (copy_to_user_tmpl(xp, skb) < 0)
1364 goto nlmsg_failure;
df71837d
TJ		 1365 if (copy_to_user_sec_ctx(xp, skb))
1366 goto nlmsg_failure;
1459bb36 1367 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 1368 goto nlmsg_failure;
1da177e4 1369
9825069d 1370 nlmsg_end(skb, nlh);
1da177e4
LT		 1371 return 0;
1372
1373nlmsg_failure:
9825069d
TG		 1374 nlmsg_cancel(skb, nlh);
1375 return -EMSGSIZE;
1da177e4
LT		 1376}
1377
4c563f76
TT		 1378static int xfrm_dump_policy_done(struct netlink_callback *cb)
1379{
1380 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1381
1382 xfrm_policy_walk_done(walk);
1383 return 0;
1384}
1385
1da177e4
LT		 1386static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1387{
fc34acd3 1388 struct net *net = sock_net(skb->sk);
4c563f76 1389 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1390 struct xfrm_dump_info info;
1391
4c563f76
TT		 1392 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1393 sizeof(cb->args) - sizeof(cb->args[0]));
1394
1da177e4
LT		 1395 info.in_skb = cb->skb;
1396 info.out_skb = skb;
1397 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1398 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1399
1400 if (!cb->args[0]) {
1401 cb->args[0] = 1;
1402 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1403 }
1404
fc34acd3 1405 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1406
1407 return skb->len;
1408}
1409
1410static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1411 struct xfrm_policy *xp,
1412 int dir, u32 seq)
1413{
1414 struct xfrm_dump_info info;
1415 struct sk_buff *skb;
1416
7deb2264 1417 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1418 if (!skb)
1419 return ERR_PTR(-ENOMEM);
1420
1da177e4
LT		 1421 info.in_skb = in_skb;
1422 info.out_skb = skb;
1423 info.nlmsg_seq = seq;
1424 info.nlmsg_flags = 0;
1da177e4
LT		 1425
1426 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1427 kfree_skb(skb);
1428 return NULL;
1429 }
1430
1431 return skb;
1432}
1433
22e70050 1434static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1435 struct nlattr **attrs)
1da177e4 1436{
fc34acd3 1437 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1438 struct xfrm_policy *xp;
1439 struct xfrm_userpolicy_id *p;
b798a9ed 1440 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1441 int err;
26b15dad 1442 struct km_event c;
1da177e4
LT		 1443 int delete;
1444
7b67c857 1445 p = nlmsg_data(nlh);
1da177e4
LT		 1446 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1447
35a7aa08 1448 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1449 if (err)
1450 return err;
1451
1da177e4
LT		 1452 err = verify_policy_dir(p->dir);
1453 if (err)
1454 return err;
1455
1456 if (p->index)
a6483b79 1457 xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err);
df71837d 1458 else {
5424f32e 1459 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1460 struct xfrm_sec_ctx *ctx;
df71837d 1461
35a7aa08 1462 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1463 if (err)
1464 return err;
1465
2c8dd116 1466 ctx = NULL;
df71837d 1467 if (rt) {
5424f32e 1468 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1469
03e1ad7b
PM		 1470 err = security_xfrm_policy_alloc(&ctx, uctx);
1471 if (err)
df71837d 1472 return err;
2c8dd116 1473 }
a6483b79 1474 xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx,
ef41aaa0 1475 delete, &err);
03e1ad7b 1476 security_xfrm_policy_free(ctx);
df71837d 1477 }
1da177e4
LT		 1478 if (xp == NULL)
1479 return -ENOENT;
1480
1481 if (!delete) {
1482 struct sk_buff *resp_skb;
1483
1484 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1485 if (IS_ERR(resp_skb)) {
1486 err = PTR_ERR(resp_skb);
1487 } else {
a6483b79 1488 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
082a1ad5 1489 NETLINK_CB(skb).pid);
1da177e4 1490 }
26b15dad 1491 } else {
2532386f
EP		 1492 uid_t loginuid = NETLINK_CB(skb).loginuid;
1493 u32 sessionid = NETLINK_CB(skb).sessionid;
1494 u32 sid = NETLINK_CB(skb).sid;
1495
1496 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1497 sid);
13fcfbb0
DM		 1498
1499 if (err != 0)
c8c05a8e 1500 goto out;
13fcfbb0 1501
e7443892 1502 c.data.byid = p->index;
f60f6b8f 1503 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1504 c.seq = nlh->nlmsg_seq;
1505 c.pid = nlh->nlmsg_pid;
1506 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1507 }
1508
c8c05a8e 1509out:
ef41aaa0 1510 xfrm_pol_put(xp);
1da177e4
LT		 1511 return err;
1512}
1513
22e70050 1514static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1515 struct nlattr **attrs)
1da177e4 1516{
fc34acd3 1517 struct net *net = sock_net(skb->sk);
26b15dad 1518 struct km_event c;
7b67c857 1519 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1520 struct xfrm_audit audit_info;
4aa2e62c 1521 int err;
1da177e4 1522
161a09e7 1523 audit_info.loginuid = NETLINK_CB(skb).loginuid;
2532386f 1524 audit_info.sessionid = NETLINK_CB(skb).sessionid;
161a09e7 1525 audit_info.secid = NETLINK_CB(skb).sid;
fc34acd3 1526 err = xfrm_state_flush(net, p->proto, &audit_info);
4aa2e62c 1527 if (err)
19f4c713 1528 return 0;
bf08867f 1529 c.data.proto = p->proto;
f60f6b8f 1530 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1531 c.seq = nlh->nlmsg_seq;
1532 c.pid = nlh->nlmsg_pid;
7067802e 1533 c.net = net;
26b15dad
JHS		 1534 km_state_notify(NULL, &c);
1535
1da177e4
LT		 1536 return 0;
1537}
1538
7deb2264
TG		 1539static inline size_t xfrm_aevent_msgsize(void)
1540{
1541 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1542 + nla_total_size(sizeof(struct xfrm_replay_state))
1543 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1544 + nla_total_size(4) /* XFRM_AE_RTHR */
1545 + nla_total_size(4); /* XFRM_AE_ETHR */
1546}
d51d081d
JHS		 1547
1548static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1549{
1550 struct xfrm_aevent_id *id;
1551 struct nlmsghdr *nlh;
d51d081d 1552
79b8b7f4
TG		 1553 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1554 if (nlh == NULL)
1555 return -EMSGSIZE;
d51d081d 1556
7b67c857 1557 id = nlmsg_data(nlh);
2b5f6dcc 1558 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1559 id->sa_id.spi = x->id.spi;
1560 id->sa_id.family = x->props.family;
1561 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1562 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1563 id->reqid = x->props.reqid;
d51d081d
JHS		 1564 id->flags = c->data.aevent;
1565
c0144bea
TG		 1566 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1567 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
d51d081d 1568
c0144bea
TG		 1569 if (id->flags & XFRM_AE_RTHR)
1570 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
d51d081d 1571
c0144bea
TG		 1572 if (id->flags & XFRM_AE_ETHR)
1573 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1574 x->replay_maxage * 10 / HZ);
d51d081d 1575
9825069d 1576 return nlmsg_end(skb, nlh);
d51d081d 1577
c0144bea 1578nla_put_failure:
9825069d
TG		 1579 nlmsg_cancel(skb, nlh);
1580 return -EMSGSIZE;
d51d081d
JHS		 1581}
1582
22e70050 1583static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1584 struct nlattr **attrs)
d51d081d 1585{
fc34acd3 1586 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1587 struct xfrm_state *x;
1588 struct sk_buff *r_skb;
1589 int err;
1590 struct km_event c;
7b67c857 1591 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1592 struct xfrm_usersa_id *id = &p->sa_id;
1593
7deb2264 1594 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 1595 if (r_skb == NULL)
1596 return -ENOMEM;
1597
a6483b79 1598 x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family);
d51d081d 1599 if (x == NULL) {
b08d5840 1600 kfree_skb(r_skb);
d51d081d
JHS		 1601 return -ESRCH;
1602 }
1603
1604 /*
1605 * XXX: is this lock really needed - none of the other
1606 * gets lock (the concern is things getting updated
1607 * while we are still reading) - jhs
1608 */
1609 spin_lock_bh(&x->lock);
1610 c.data.aevent = p->flags;
1611 c.seq = nlh->nlmsg_seq;
1612 c.pid = nlh->nlmsg_pid;
1613
1614 if (build_aevent(r_skb, x, &c) < 0)
1615 BUG();
a6483b79 1616 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
d51d081d
JHS		 1617 spin_unlock_bh(&x->lock);
1618 xfrm_state_put(x);
1619 return err;
1620}
1621
22e70050 1622static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1623 struct nlattr **attrs)
d51d081d 1624{
fc34acd3 1625 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1626 struct xfrm_state *x;
1627 struct km_event c;
1628 int err = - EINVAL;
7b67c857 1629 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e
TG		 1630 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1631 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d
JHS		 1632
1633 if (!lt && !rp)
1634 return err;
1635
1636 /* pedantic mode - thou shalt sayeth replaceth */
1637 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1638 return err;
1639
fc34acd3 1640 x = xfrm_state_lookup(net, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1641 if (x == NULL)
1642 return -ESRCH;
1643
1644 if (x->km.state != XFRM_STATE_VALID)
1645 goto out;
1646
1647 spin_lock_bh(&x->lock);
35a7aa08 1648 xfrm_update_ae_params(x, attrs);
d51d081d 1649 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1650
1651 c.event = nlh->nlmsg_type;
1652 c.seq = nlh->nlmsg_seq;
1653 c.pid = nlh->nlmsg_pid;
1654 c.data.aevent = XFRM_AE_CU;
1655 km_state_notify(x, &c);
1656 err = 0;
1657out:
1658 xfrm_state_put(x);
1659 return err;
1660}
1661
22e70050 1662static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1663 struct nlattr **attrs)
1da177e4 1664{
fc34acd3 1665 struct net *net = sock_net(skb->sk);
f7b6983f 1666 struct km_event c;
b798a9ed 1667 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1668 int err;
161a09e7 1669 struct xfrm_audit audit_info;
f7b6983f 1670
35a7aa08 1671 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1672 if (err)
1673 return err;
26b15dad 1674
161a09e7 1675 audit_info.loginuid = NETLINK_CB(skb).loginuid;
2532386f 1676 audit_info.sessionid = NETLINK_CB(skb).sessionid;
161a09e7 1677 audit_info.secid = NETLINK_CB(skb).sid;
fc34acd3 1678 err = xfrm_policy_flush(net, type, &audit_info);
4aa2e62c 1679 if (err)
0dca3a84 1680 return 0;
f7b6983f 1681 c.data.type = type;
f60f6b8f 1682 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1683 c.seq = nlh->nlmsg_seq;
1684 c.pid = nlh->nlmsg_pid;
7067802e 1685 c.net = net;
26b15dad 1686 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1687 return 0;
1688}
1689
22e70050 1690static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1691 struct nlattr **attrs)
6c5c8ca7 1692{
fc34acd3 1693 struct net *net = sock_net(skb->sk);
6c5c8ca7 1694 struct xfrm_policy *xp;
7b67c857 1695 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1696 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1697 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7
JHS		 1698 int err = -ENOENT;
1699
35a7aa08 1700 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1701 if (err)
1702 return err;
1703
6c5c8ca7 1704 if (p->index)
fc34acd3 1705 xp = xfrm_policy_byid(net, type, p->dir, p->index, 0, &err);
6c5c8ca7 1706 else {
5424f32e 1707 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1708 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1709
35a7aa08 1710 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1711 if (err)
1712 return err;
1713
2c8dd116 1714 ctx = NULL;
6c5c8ca7 1715 if (rt) {
5424f32e 1716 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1717
03e1ad7b
PM		 1718 err = security_xfrm_policy_alloc(&ctx, uctx);
1719 if (err)
6c5c8ca7 1720 return err;
2c8dd116 1721 }
fc34acd3 1722 xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx, 0, &err);
03e1ad7b 1723 security_xfrm_policy_free(ctx);
6c5c8ca7 1724 }
6c5c8ca7 1725 if (xp == NULL)
ef41aaa0 1726 return -ENOENT;
03e1ad7b 1727
ef41aaa0 1728 read_lock(&xp->lock);
12a169e7 1729 if (xp->walk.dead) {
6c5c8ca7
JHS		 1730 read_unlock(&xp->lock);
1731 goto out;
1732 }
1733
1734 read_unlock(&xp->lock);
1735 err = 0;
1736 if (up->hard) {
2532386f
EP		 1737 uid_t loginuid = NETLINK_CB(skb).loginuid;
1738 uid_t sessionid = NETLINK_CB(skb).sessionid;
1739 u32 sid = NETLINK_CB(skb).sid;
6c5c8ca7 1740 xfrm_policy_delete(xp, p->dir);
2532386f 1741 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
161a09e7 1742
6c5c8ca7
JHS		 1743 } else {
1744 // reset the timers here?
1745 printk("Dont know what to do with soft policy expire\n");
1746 }
1747 km_policy_expired(xp, p->dir, up->hard, current->pid);
1748
1749out:
1750 xfrm_pol_put(xp);
1751 return err;
1752}
1753
22e70050 1754static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1755 struct nlattr **attrs)
53bc6b4d 1756{
fc34acd3 1757 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 1758 struct xfrm_state *x;
1759 int err;
7b67c857 1760 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d
JHS		 1761 struct xfrm_usersa_info *p = &ue->state;
1762
fc34acd3 1763 x = xfrm_state_lookup(net, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1764
3a765aa5 1765 err = -ENOENT;
53bc6b4d
JHS		 1766 if (x == NULL)
1767 return err;
1768
53bc6b4d 1769 spin_lock_bh(&x->lock);
3a765aa5 1770 err = -EINVAL;
53bc6b4d
JHS		 1771 if (x->km.state != XFRM_STATE_VALID)
1772 goto out;
1773 km_state_expired(x, ue->hard, current->pid);
1774
161a09e7 1775 if (ue->hard) {
2532386f
EP		 1776 uid_t loginuid = NETLINK_CB(skb).loginuid;
1777 uid_t sessionid = NETLINK_CB(skb).sessionid;
1778 u32 sid = NETLINK_CB(skb).sid;
53bc6b4d 1779 __xfrm_state_delete(x);
2532386f 1780 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
161a09e7 1781 }
3a765aa5 1782 err = 0;
53bc6b4d
JHS		 1783out:
1784 spin_unlock_bh(&x->lock);
1785 xfrm_state_put(x);
1786 return err;
1787}
1788
22e70050 1789static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1790 struct nlattr **attrs)
980ebd25 1791{
fc34acd3 1792 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 1793 struct xfrm_policy *xp;
1794 struct xfrm_user_tmpl *ut;
1795 int i;
5424f32e 1796 struct nlattr *rt = attrs[XFRMA_TMPL];
980ebd25 1797
7b67c857 1798 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 1799 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 1800 int err = -ENOMEM;
1801
1802 if (!x)
d8eb9307 1803 goto nomem;
980ebd25
JHS		 1804
1805 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 1806 if (err)
1807 goto bad_policy;
980ebd25
JHS		 1808
1809 /* build an XP */
fc34acd3 1810 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 1811 if (!xp)
1812 goto free_state;
980ebd25
JHS		 1813
1814 memcpy(&x->id, &ua->id, sizeof(ua->id));
1815 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1816 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1817
5424f32e 1818 ut = nla_data(rt);
980ebd25
JHS		 1819 /* extract the templates and for each call km_key */
1820 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1821 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1822 memcpy(&x->id, &t->id, sizeof(x->id));
1823 x->props.mode = t->mode;
1824 x->props.reqid = t->reqid;
1825 x->props.family = ut->family;
1826 t->aalgos = ua->aalgos;
1827 t->ealgos = ua->ealgos;
1828 t->calgos = ua->calgos;
1829 err = km_query(x, t, xp);
1830
1831 }
1832
1833 kfree(x);
1834 kfree(xp);
1835
1836 return 0;
d8eb9307
IJ		 1837
1838bad_policy:
1839 printk("BAD policy passed\n");
1840free_state:
1841 kfree(x);
1842nomem:
1843 return err;
980ebd25
JHS		 1844}
1845
5c79de6e 1846#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 1847static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 1848 struct xfrm_kmaddress *k,
5424f32e 1849 struct nlattr **attrs, int *num)
5c79de6e 1850{
5424f32e 1851 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 1852 struct xfrm_user_migrate *um;
1853 int i, num_migrate;
1854
13c1d189
AE		 1855 if (k != NULL) {
1856 struct xfrm_user_kmaddress *uk;
1857
1858 uk = nla_data(attrs[XFRMA_KMADDRESS]);
1859 memcpy(&k->local, &uk->local, sizeof(k->local));
1860 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
1861 k->family = uk->family;
1862 k->reserved = uk->reserved;
1863 }
1864
5424f32e
TG		 1865 um = nla_data(rt);
1866 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 1867
1868 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1869 return -EINVAL;
1870
1871 for (i = 0; i < num_migrate; i++, um++, ma++) {
1872 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1873 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1874 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1875 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1876
1877 ma->proto = um->proto;
1878 ma->mode = um->mode;
1879 ma->reqid = um->reqid;
1880
1881 ma->old_family = um->old_family;
1882 ma->new_family = um->new_family;
1883 }
1884
1885 *num = i;
1886 return 0;
1887}
1888
1889static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1890 struct nlattr **attrs)
5c79de6e 1891{
7b67c857 1892 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 1893 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 1894 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 1895 u8 type;
1896 int err;
1897 int n = 0;
1898
35a7aa08 1899 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 1900 return -EINVAL;
5c79de6e 1901
13c1d189
AE		 1902 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
1903
5424f32e 1904 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 1905 if (err)
1906 return err;
1907
13c1d189 1908 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 1909 if (err)
1910 return err;
1911
1912 if (!n)
1913 return 0;
1914
13c1d189 1915 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
5c79de6e
SS		 1916
1917 return 0;
1918}
1919#else
1920static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1921 struct nlattr **attrs)
5c79de6e
SS		 1922{
1923 return -ENOPROTOOPT;
1924}
1925#endif
1926
1927#ifdef CONFIG_XFRM_MIGRATE
1928static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1929{
1930 struct xfrm_user_migrate um;
1931
1932 memset(&um, 0, sizeof(um));
1933 um.proto = m->proto;
1934 um.mode = m->mode;
1935 um.reqid = m->reqid;
1936 um.old_family = m->old_family;
1937 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1938 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1939 um.new_family = m->new_family;
1940 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1941 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1942
c0144bea 1943 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 1944}
1945
13c1d189
AE		 1946static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb)
1947{
1948 struct xfrm_user_kmaddress uk;
1949
1950 memset(&uk, 0, sizeof(uk));
1951 uk.family = k->family;
1952 uk.reserved = k->reserved;
1953 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 1954 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 1955
1956 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
1957}
1958
1959static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 1960{
1961 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 1962 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
1963 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1964 + userpolicy_type_attrsize();
7deb2264
TG		 1965}
1966
5c79de6e 1967static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
13c1d189
AE		 1968 int num_migrate, struct xfrm_kmaddress *k,
1969 struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e
SS		 1970{
1971 struct xfrm_migrate *mp;
1972 struct xfrm_userpolicy_id *pol_id;
1973 struct nlmsghdr *nlh;
5c79de6e
SS		 1974 int i;
1975
79b8b7f4
TG		 1976 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1977 if (nlh == NULL)
1978 return -EMSGSIZE;
5c79de6e 1979
7b67c857 1980 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 1981 /* copy data from selector, dir, and type to the pol_id */
1982 memset(pol_id, 0, sizeof(*pol_id));
1983 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1984 pol_id->dir = dir;
1985
13c1d189
AE		 1986 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
1987 goto nlmsg_failure;
1988
5c79de6e
SS		 1989 if (copy_to_user_policy_type(type, skb) < 0)
1990 goto nlmsg_failure;
1991
1992 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1993 if (copy_to_user_migrate(mp, skb) < 0)
1994 goto nlmsg_failure;
1995 }
1996
9825069d 1997 return nlmsg_end(skb, nlh);
5c79de6e 1998nlmsg_failure:
9825069d
TG		 1999 nlmsg_cancel(skb, nlh);
2000 return -EMSGSIZE;
5c79de6e
SS		 2001}
2002
2003static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 2004 struct xfrm_migrate *m, int num_migrate,
2005 struct xfrm_kmaddress *k)
5c79de6e 2006{
a6483b79 2007 struct net *net = &init_net;
5c79de6e 2008 struct sk_buff *skb;
5c79de6e 2009
13c1d189 2010 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2011 if (skb == NULL)
2012 return -ENOMEM;
2013
2014 /* build migrate */
13c1d189 2015 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2016 BUG();
2017
a6483b79 2018 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 2019}
2020#else
2021static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 2022 struct xfrm_migrate *m, int num_migrate,
2023 struct xfrm_kmaddress *k)
5c79de6e
SS		 2024{
2025 return -ENOPROTOOPT;
2026}
2027#endif
d51d081d 2028
a7bd9a45 2029#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2030
2031static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2032 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2033 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2034 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2035 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2036 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2037 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2038 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2039 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2040 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2041 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2042 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2043 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2044 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2045 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2046 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2047 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2048 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2049 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 2050 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2051 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2052};
2053
492b558b
TG		 2054#undef XMSGSIZE
2055
cf5cb79f 2056static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2057 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2058 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2059 [XFRMA_LASTUSED] = { .type = NLA_U64},
2060 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2061 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2062 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2063 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2064 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2065 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2066 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2067 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2068 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2069 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2070 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2071 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2072 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2073 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2074 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2075 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2076 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
cf5cb79f
TG		 2077};
2078
1da177e4 2079static struct xfrm_link {
5424f32e 2080 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2081 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2082 int (*done)(struct netlink_callback *);
492b558b
TG		 2083} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2084 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2085 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2086 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2087 .dump = xfrm_dump_sa,
2088 .done = xfrm_dump_sa_done },
492b558b
TG		 2089 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2090 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2091 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2092 .dump = xfrm_dump_policy,
2093 .done = xfrm_dump_policy_done },
492b558b 2094 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2095 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2096 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2097 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2098 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2099 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2100 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2101 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2102 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2103 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2104 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2105 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 2106 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2107};
2108
1d00a4eb 2109static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2110{
a6483b79 2111 struct net *net = sock_net(skb->sk);
35a7aa08 2112 struct nlattr *attrs[XFRMA_MAX+1];
1da177e4 2113 struct xfrm_link *link;
a7bd9a45 2114 int type, err;
1da177e4 2115
1da177e4 2116 type = nlh->nlmsg_type;
1da177e4 2117 if (type > XFRM_MSG_MAX)
1d00a4eb 2118 return -EINVAL;
1da177e4
LT		 2119
2120 type -= XFRM_MSG_BASE;
2121 link = &xfrm_dispatch[type];
2122
2123 /* All operations require privileges, even GET */
1d00a4eb
TG		 2124 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2125 return -EPERM;
1da177e4 2126
492b558b
TG		 2127 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2128 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2129 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2130 if (link->dump == NULL)
1d00a4eb 2131 return -EINVAL;
88fc2c84 2132
a6483b79 2133 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
1da177e4
LT		 2134 }
2135
35a7aa08 2136 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2137 xfrma_policy);
a7bd9a45
TG		 2138 if (err < 0)
2139 return err;
1da177e4
LT		 2140
2141 if (link->doit == NULL)
1d00a4eb 2142 return -EINVAL;
1da177e4 2143
5424f32e 2144 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2145}
2146
cd40b7d3 2147static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2148{
cd40b7d3
DL		 2149 mutex_lock(&xfrm_cfg_mutex);
2150 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2151 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 2152}
2153
7deb2264
TG		 2154static inline size_t xfrm_expire_msgsize(void)
2155{
2156 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
2157}
2158
d51d081d 2159static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2160{
2161 struct xfrm_user_expire *ue;
2162 struct nlmsghdr *nlh;
1da177e4 2163
79b8b7f4
TG		 2164 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2165 if (nlh == NULL)
2166 return -EMSGSIZE;
1da177e4 2167
7b67c857 2168 ue = nlmsg_data(nlh);
1da177e4 2169 copy_to_user_state(x, &ue->state);
d51d081d 2170 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2171
9825069d 2172 return nlmsg_end(skb, nlh);
1da177e4
LT		 2173}
2174
26b15dad 2175static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1da177e4 2176{
fc34acd3 2177 struct net *net = xs_net(x);
1da177e4
LT		 2178 struct sk_buff *skb;
2179
7deb2264 2180 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2181 if (skb == NULL)
2182 return -ENOMEM;
2183
d51d081d 2184 if (build_expire(skb, x, c) < 0)
1da177e4
LT		 2185 BUG();
2186
a6483b79 2187 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2188}
2189
d51d081d
JHS		 2190static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2191{
fc34acd3 2192 struct net *net = xs_net(x);
d51d081d 2193 struct sk_buff *skb;
d51d081d 2194
7deb2264 2195 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 2196 if (skb == NULL)
2197 return -ENOMEM;
2198
2199 if (build_aevent(skb, x, c) < 0)
2200 BUG();
2201
a6483b79 2202 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2203}
2204
26b15dad
JHS		 2205static int xfrm_notify_sa_flush(struct km_event *c)
2206{
7067802e 2207 struct net *net = c->net;
26b15dad
JHS		 2208 struct xfrm_usersa_flush *p;
2209 struct nlmsghdr *nlh;
2210 struct sk_buff *skb;
7deb2264 2211 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2212
7deb2264 2213 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2214 if (skb == NULL)
2215 return -ENOMEM;
26b15dad 2216
79b8b7f4
TG		 2217 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2218 if (nlh == NULL) {
2219 kfree_skb(skb);
2220 return -EMSGSIZE;
2221 }
26b15dad 2222
7b67c857 2223 p = nlmsg_data(nlh);
bf08867f 2224 p->proto = c->data.proto;
26b15dad 2225
9825069d 2226 nlmsg_end(skb, nlh);
26b15dad 2227
a6483b79 2228 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2229}
2230
7deb2264 2231static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2232{
7deb2264 2233 size_t l = 0;
1a6509d9
HX		 2234 if (x->aead)
2235 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2236 if (x->aalg) {
2237 l += nla_total_size(sizeof(struct xfrm_algo) +
2238 (x->aalg->alg_key_len + 7) / 8);
2239 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2240 }
26b15dad 2241 if (x->ealg)
0f99be0d 2242 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2243 if (x->calg)
7deb2264 2244 l += nla_total_size(sizeof(*x->calg));
26b15dad 2245 if (x->encap)
7deb2264 2246 l += nla_total_size(sizeof(*x->encap));
68325d3b
HX		 2247 if (x->security)
2248 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2249 x->security->ctx_len);
2250 if (x->coaddr)
2251 l += nla_total_size(sizeof(*x->coaddr));
2252
d26f3984
HX		 2253 /* Must count x->lastused as it may become non-zero behind our back. */
2254 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2255
2256 return l;
2257}
2258
2259static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2260{
fc34acd3 2261 struct net *net = xs_net(x);
26b15dad 2262 struct xfrm_usersa_info *p;
0603eac0 2263 struct xfrm_usersa_id *id;
26b15dad
JHS		 2264 struct nlmsghdr *nlh;
2265 struct sk_buff *skb;
26b15dad 2266 int len = xfrm_sa_len(x);
0603eac0
HX		 2267 int headlen;
2268
2269 headlen = sizeof(*p);
2270 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2271 len += nla_total_size(headlen);
0603eac0
HX		 2272 headlen = sizeof(*id);
2273 }
7deb2264 2274 len += NLMSG_ALIGN(headlen);
26b15dad 2275
7deb2264 2276 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2277 if (skb == NULL)
2278 return -ENOMEM;
26b15dad 2279
79b8b7f4
TG		 2280 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2281 if (nlh == NULL)
c0144bea 2282 goto nla_put_failure;
26b15dad 2283
7b67c857 2284 p = nlmsg_data(nlh);
0603eac0 2285 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2286 struct nlattr *attr;
2287
7b67c857 2288 id = nlmsg_data(nlh);
0603eac0
HX		 2289 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2290 id->spi = x->id.spi;
2291 id->family = x->props.family;
2292 id->proto = x->id.proto;
2293
c0144bea
TG		 2294 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2295 if (attr == NULL)
2296 goto nla_put_failure;
2297
2298 p = nla_data(attr);
0603eac0
HX		 2299 }
2300
68325d3b
HX		 2301 if (copy_to_user_state_extra(x, p, skb))
2302 goto nla_put_failure;
26b15dad 2303
9825069d 2304 nlmsg_end(skb, nlh);
26b15dad 2305
a6483b79 2306 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2307
c0144bea 2308nla_put_failure:
68325d3b
HX		 2309 /* Somebody screwed up with xfrm_sa_len! */
2310 WARN_ON(1);
26b15dad
JHS		 2311 kfree_skb(skb);
2312 return -1;
2313}
2314
2315static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2316{
2317
2318 switch (c->event) {
f60f6b8f 2319 case XFRM_MSG_EXPIRE:
26b15dad 2320 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2321 case XFRM_MSG_NEWAE:
2322 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2323 case XFRM_MSG_DELSA:
2324 case XFRM_MSG_UPDSA:
2325 case XFRM_MSG_NEWSA:
26b15dad 2326 return xfrm_notify_sa(x, c);
f60f6b8f 2327 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2328 return xfrm_notify_sa_flush(c);
2329 default:
2330 printk("xfrm_user: Unknown SA event %d\n", c->event);
2331 break;
2332 }
2333
2334 return 0;
2335
2336}
2337
7deb2264
TG		 2338static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2339 struct xfrm_policy *xp)
2340{
2341 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2342 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2343 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2344 + userpolicy_type_attrsize();
2345}
2346
1da177e4
LT		 2347static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2348 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2349 int dir)
2350{
2351 struct xfrm_user_acquire *ua;
2352 struct nlmsghdr *nlh;
1da177e4
LT		 2353 __u32 seq = xfrm_get_acqseq();
2354
79b8b7f4
TG		 2355 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2356 if (nlh == NULL)
2357 return -EMSGSIZE;
1da177e4 2358
7b67c857 2359 ua = nlmsg_data(nlh);
1da177e4
LT		 2360 memcpy(&ua->id, &x->id, sizeof(ua->id));
2361 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2362 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2363 copy_to_user_policy(xp, &ua->policy, dir);
2364 ua->aalgos = xt->aalgos;
2365 ua->ealgos = xt->ealgos;
2366 ua->calgos = xt->calgos;
2367 ua->seq = x->km.seq = seq;
2368
2369 if (copy_to_user_tmpl(xp, skb) < 0)
2370 goto nlmsg_failure;
0d681623 2371 if (copy_to_user_state_sec_ctx(x, skb))
df71837d 2372 goto nlmsg_failure;
1459bb36 2373 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2374 goto nlmsg_failure;
1da177e4 2375
9825069d 2376 return nlmsg_end(skb, nlh);
1da177e4
LT		 2377
2378nlmsg_failure:
9825069d
TG		 2379 nlmsg_cancel(skb, nlh);
2380 return -EMSGSIZE;
1da177e4
LT		 2381}
2382
2383static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2384 struct xfrm_policy *xp, int dir)
2385{
a6483b79 2386 struct net *net = xs_net(x);
1da177e4 2387 struct sk_buff *skb;
1da177e4 2388
7deb2264 2389 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2390 if (skb == NULL)
2391 return -ENOMEM;
2392
2393 if (build_acquire(skb, x, xt, xp, dir) < 0)
2394 BUG();
2395
a6483b79 2396 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2397}
2398
2399/* User gives us xfrm_user_policy_info followed by an array of 0
2400 * or more templates.
2401 */
cb969f07 2402static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2403 u8 *data, int len, int *dir)
2404{
fc34acd3 2405 struct net *net = sock_net(sk);
1da177e4
LT		 2406 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2407 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2408 struct xfrm_policy *xp;
2409 int nr;
2410
cb969f07 2411 switch (sk->sk_family) {
1da177e4
LT		 2412 case AF_INET:
2413 if (opt != IP_XFRM_POLICY) {
2414 *dir = -EOPNOTSUPP;
2415 return NULL;
2416 }
2417 break;
2418#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2419 case AF_INET6:
2420 if (opt != IPV6_XFRM_POLICY) {
2421 *dir = -EOPNOTSUPP;
2422 return NULL;
2423 }
2424 break;
2425#endif
2426 default:
2427 *dir = -EINVAL;
2428 return NULL;
2429 }
2430
2431 *dir = -EINVAL;
2432
2433 if (len < sizeof(*p) ||
2434 verify_newpolicy_info(p))
2435 return NULL;
2436
2437 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2438 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2439 return NULL;
2440
a4f1bac6
HX		 2441 if (p->dir > XFRM_POLICY_OUT)
2442 return NULL;
2443
fc34acd3 2444 xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 2445 if (xp == NULL) {
2446 *dir = -ENOBUFS;
2447 return NULL;
2448 }
2449
2450 copy_from_user_policy(xp, p);
f7b6983f 2451 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2452 copy_templates(xp, ut, nr);
2453
2454 *dir = p->dir;
2455
2456 return xp;
2457}
2458
7deb2264
TG		 2459static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2460{
2461 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2462 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2463 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2464 + userpolicy_type_attrsize();
2465}
2466
1da177e4 2467static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
d51d081d 2468 int dir, struct km_event *c)
1da177e4
LT		 2469{
2470 struct xfrm_user_polexpire *upe;
2471 struct nlmsghdr *nlh;
d51d081d 2472 int hard = c->data.hard;
1da177e4 2473
79b8b7f4
TG		 2474 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2475 if (nlh == NULL)
2476 return -EMSGSIZE;
1da177e4 2477
7b67c857 2478 upe = nlmsg_data(nlh);
1da177e4
LT		 2479 copy_to_user_policy(xp, &upe->pol, dir);
2480 if (copy_to_user_tmpl(xp, skb) < 0)
2481 goto nlmsg_failure;
df71837d
TJ		 2482 if (copy_to_user_sec_ctx(xp, skb))
2483 goto nlmsg_failure;
1459bb36 2484 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2485 goto nlmsg_failure;
1da177e4
LT		 2486 upe->hard = !!hard;
2487
9825069d 2488 return nlmsg_end(skb, nlh);
1da177e4
LT		 2489
2490nlmsg_failure:
9825069d
TG		 2491 nlmsg_cancel(skb, nlh);
2492 return -EMSGSIZE;
1da177e4
LT		 2493}
2494
26b15dad 2495static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4 2496{
fc34acd3 2497 struct net *net = xp_net(xp);
1da177e4 2498 struct sk_buff *skb;
1da177e4 2499
7deb2264 2500 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2501 if (skb == NULL)
2502 return -ENOMEM;
2503
d51d081d 2504 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2505 BUG();
2506
a6483b79 2507 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2508}
2509
26b15dad
JHS		 2510static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2511{
fc34acd3 2512 struct net *net = xp_net(xp);
26b15dad 2513 struct xfrm_userpolicy_info *p;
0603eac0 2514 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2515 struct nlmsghdr *nlh;
2516 struct sk_buff *skb;
7deb2264 2517 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
0603eac0
HX		 2518 int headlen;
2519
2520 headlen = sizeof(*p);
2521 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2522 len += nla_total_size(headlen);
0603eac0
HX		 2523 headlen = sizeof(*id);
2524 }
cfbfd45a 2525 len += userpolicy_type_attrsize();
7deb2264 2526 len += NLMSG_ALIGN(headlen);
26b15dad 2527
7deb2264 2528 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2529 if (skb == NULL)
2530 return -ENOMEM;
26b15dad 2531
79b8b7f4
TG		 2532 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2533 if (nlh == NULL)
2534 goto nlmsg_failure;
26b15dad 2535
7b67c857 2536 p = nlmsg_data(nlh);
0603eac0 2537 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2538 struct nlattr *attr;
2539
7b67c857 2540 id = nlmsg_data(nlh);
0603eac0
HX		 2541 memset(id, 0, sizeof(*id));
2542 id->dir = dir;
2543 if (c->data.byid)
2544 id->index = xp->index;
2545 else
2546 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2547
c0144bea
TG		 2548 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2549 if (attr == NULL)
2550 goto nlmsg_failure;
2551
2552 p = nla_data(attr);
0603eac0 2553 }
26b15dad 2554
26b15dad
JHS		 2555 copy_to_user_policy(xp, p, dir);
2556 if (copy_to_user_tmpl(xp, skb) < 0)
2557 goto nlmsg_failure;
1459bb36 2558 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2559 goto nlmsg_failure;
26b15dad 2560
9825069d 2561 nlmsg_end(skb, nlh);
26b15dad 2562
a6483b79 2563 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2564
2565nlmsg_failure:
2566 kfree_skb(skb);
2567 return -1;
2568}
2569
2570static int xfrm_notify_policy_flush(struct km_event *c)
2571{
7067802e 2572 struct net *net = c->net;
26b15dad
JHS		 2573 struct nlmsghdr *nlh;
2574 struct sk_buff *skb;
26b15dad 2575
7deb2264 2576 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2577 if (skb == NULL)
2578 return -ENOMEM;
26b15dad 2579
79b8b7f4
TG		 2580 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2581 if (nlh == NULL)
2582 goto nlmsg_failure;
0c51f53c
JHS		 2583 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2584 goto nlmsg_failure;
26b15dad 2585
9825069d 2586 nlmsg_end(skb, nlh);
26b15dad 2587
a6483b79 2588 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2589
2590nlmsg_failure:
2591 kfree_skb(skb);
2592 return -1;
2593}
2594
2595static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2596{
2597
2598 switch (c->event) {
f60f6b8f
HX		 2599 case XFRM_MSG_NEWPOLICY:
2600 case XFRM_MSG_UPDPOLICY:
2601 case XFRM_MSG_DELPOLICY:
26b15dad 2602 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2603 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2604 return xfrm_notify_policy_flush(c);
f60f6b8f 2605 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2606 return xfrm_exp_policy_notify(xp, dir, c);
2607 default:
2608 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2609 }
2610
2611 return 0;
2612
2613}
2614
7deb2264
TG		 2615static inline size_t xfrm_report_msgsize(void)
2616{
2617 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2618}
2619
97a64b45
MN		 2620static int build_report(struct sk_buff *skb, u8 proto,
2621 struct xfrm_selector *sel, xfrm_address_t *addr)
2622{
2623 struct xfrm_user_report *ur;
2624 struct nlmsghdr *nlh;
97a64b45 2625
79b8b7f4
TG		 2626 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2627 if (nlh == NULL)
2628 return -EMSGSIZE;
97a64b45 2629
7b67c857 2630 ur = nlmsg_data(nlh);
97a64b45
MN		 2631 ur->proto = proto;
2632 memcpy(&ur->sel, sel, sizeof(ur->sel));
2633
2634 if (addr)
c0144bea 2635 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
97a64b45 2636
9825069d 2637 return nlmsg_end(skb, nlh);
97a64b45 2638
c0144bea 2639nla_put_failure:
9825069d
TG		 2640 nlmsg_cancel(skb, nlh);
2641 return -EMSGSIZE;
97a64b45
MN		 2642}
2643
db983c11
AD		 2644static int xfrm_send_report(struct net *net, u8 proto,
2645 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2646{
2647 struct sk_buff *skb;
97a64b45 2648
7deb2264 2649 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2650 if (skb == NULL)
2651 return -ENOMEM;
2652
2653 if (build_report(skb, proto, sel, addr) < 0)
2654 BUG();
2655
a6483b79 2656 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2657}
2658
3a2dfbe8
MW		 2659static inline size_t xfrm_mapping_msgsize(void)
2660{
2661 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2662}
2663
2664static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2665 xfrm_address_t *new_saddr, __be16 new_sport)
2666{
2667 struct xfrm_user_mapping *um;
2668 struct nlmsghdr *nlh;
2669
2670 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2671 if (nlh == NULL)
2672 return -EMSGSIZE;
2673
2674 um = nlmsg_data(nlh);
2675
2676 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2677 um->id.spi = x->id.spi;
2678 um->id.family = x->props.family;
2679 um->id.proto = x->id.proto;
2680 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2681 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2682 um->new_sport = new_sport;
2683 um->old_sport = x->encap->encap_sport;
2684 um->reqid = x->props.reqid;
2685
2686 return nlmsg_end(skb, nlh);
2687}
2688
2689static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2690 __be16 sport)
2691{
a6483b79 2692 struct net *net = xs_net(x);
3a2dfbe8
MW		 2693 struct sk_buff *skb;
2694
2695 if (x->id.proto != IPPROTO_ESP)
2696 return -EINVAL;
2697
2698 if (!x->encap)
2699 return -EINVAL;
2700
2701 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2702 if (skb == NULL)
2703 return -ENOMEM;
2704
2705 if (build_mapping(skb, x, ipaddr, sport) < 0)
2706 BUG();
2707
a6483b79 2708 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2709}
2710
1da177e4
LT		 2711static struct xfrm_mgr netlink_mgr = {
2712 .id = "netlink",
2713 .notify = xfrm_send_state_notify,
2714 .acquire = xfrm_send_acquire,
2715 .compile_policy = xfrm_compile_policy,
2716 .notify_policy = xfrm_send_policy_notify,
97a64b45 2717 .report = xfrm_send_report,
5c79de6e 2718 .migrate = xfrm_send_migrate,
3a2dfbe8 2719 .new_mapping = xfrm_send_mapping,
1da177e4
LT		 2720};
2721
a6483b79 2722static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 2723{
be33690d
PM		 2724 struct sock *nlsk;
2725
a6483b79 2726 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
af65bdfc 2727 xfrm_netlink_rcv, NULL, THIS_MODULE);
be33690d 2728 if (nlsk == NULL)
1da177e4 2729 return -ENOMEM;
d79d792e 2730 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
a6483b79 2731 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 2732 return 0;
2733}
2734
d79d792e 2735static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 2736{
d79d792e
EB		 2737 struct net *net;
2738 list_for_each_entry(net, net_exit_list, exit_list)
2739 rcu_assign_pointer(net->xfrm.nlsk, NULL);
2740 synchronize_net();
2741 list_for_each_entry(net, net_exit_list, exit_list)
2742 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 2743}
2744
a6483b79 2745static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 2746 .init = xfrm_user_net_init,
2747 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 2748};
2749
2750static int __init xfrm_user_init(void)
2751{
2752 int rv;
2753
2754 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2755
2756 rv = register_pernet_subsys(&xfrm_user_net_ops);
2757 if (rv < 0)
2758 return rv;
2759 rv = xfrm_register_km(&netlink_mgr);
2760 if (rv < 0)
2761 unregister_pernet_subsys(&xfrm_user_net_ops);
2762 return rv;
2763}
2764
2765static void __exit xfrm_user_exit(void)
2766{
2767 xfrm_unregister_km(&netlink_mgr);
2768 unregister_pernet_subsys(&xfrm_user_net_ops);
2769}
2770
1da177e4
LT		 2771module_init(xfrm_user_init);
2772module_exit(xfrm_user_exit);
2773MODULE_LICENSE("GPL");
4fdb3bb7 2774MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 2775
Linux 6.x block layer and io_uring tree(s)