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esp6: Add support for IPsec extended sequence numbers
[linux-2.6-block.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
fa6dd8a2 29#include <net/ah.h>
1da177e4 30#include <asm/uaccess.h>
e23c7194
MN		 31#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
32#include <linux/in6.h>
33#endif
1da177e4 34
1a6509d9
HX		 35static inline int aead_len(struct xfrm_algo_aead *alg)
36{
37 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
38}
39
5424f32e 40static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 41{
5424f32e 42 struct nlattr *rt = attrs[type];
1da177e4
LT		 43 struct xfrm_algo *algp;
44
45 if (!rt)
46 return 0;
47
5424f32e 48 algp = nla_data(rt);
0f99be0d 49 if (nla_len(rt) < xfrm_alg_len(algp))
31c26852
HX		 50 return -EINVAL;
51
1da177e4
LT		 52 switch (type) {
53 case XFRMA_ALG_AUTH:
1da177e4 54 case XFRMA_ALG_CRYPT:
1da177e4 55 case XFRMA_ALG_COMP:
1da177e4
LT		 56 break;
57
58 default:
59 return -EINVAL;
3ff50b79 60 }
1da177e4
LT		 61
62 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
63 return 0;
64}
65
4447bb33
MW		 66static int verify_auth_trunc(struct nlattr **attrs)
67{
68 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
69 struct xfrm_algo_auth *algp;
70
71 if (!rt)
72 return 0;
73
74 algp = nla_data(rt);
75 if (nla_len(rt) < xfrm_alg_auth_len(algp))
76 return -EINVAL;
77
78 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
79 return 0;
80}
81
1a6509d9
HX		 82static int verify_aead(struct nlattr **attrs)
83{
84 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
85 struct xfrm_algo_aead *algp;
86
87 if (!rt)
88 return 0;
89
90 algp = nla_data(rt);
91 if (nla_len(rt) < aead_len(algp))
92 return -EINVAL;
93
94 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
95 return 0;
96}
97
5424f32e 98static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 99 xfrm_address_t **addrp)
100{
5424f32e 101 struct nlattr *rt = attrs[type];
eb2971b6 102
cf5cb79f 103 if (rt && addrp)
5424f32e 104 *addrp = nla_data(rt);
eb2971b6 105}
df71837d 106
5424f32e 107static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 108{
5424f32e 109 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 110 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 111
112 if (!rt)
113 return 0;
114
5424f32e 115 uctx = nla_data(rt);
cf5cb79f 116 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 117 return -EINVAL;
118
119 return 0;
120}
121
122
1da177e4 123static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 124 struct nlattr **attrs)
1da177e4
LT		 125{
126 int err;
127
128 err = -EINVAL;
129 switch (p->family) {
130 case AF_INET:
131 break;
132
133 case AF_INET6:
134#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
135 break;
136#else
137 err = -EAFNOSUPPORT;
138 goto out;
139#endif
140
141 default:
142 goto out;
3ff50b79 143 }
1da177e4
LT		 144
145 err = -EINVAL;
146 switch (p->id.proto) {
147 case IPPROTO_AH:
4447bb33
MW		 148 if ((!attrs[XFRMA_ALG_AUTH] &&
149 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 150 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 151 attrs[XFRMA_ALG_CRYPT] ||
35d2856b
MW		 152 attrs[XFRMA_ALG_COMP] ||
153 attrs[XFRMA_TFCPAD])
1da177e4
LT		 154 goto out;
155 break;
156
157 case IPPROTO_ESP:
1a6509d9
HX		 158 if (attrs[XFRMA_ALG_COMP])
159 goto out;
160 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 161 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 162 !attrs[XFRMA_ALG_CRYPT] &&
163 !attrs[XFRMA_ALG_AEAD])
164 goto out;
165 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 166 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 167 attrs[XFRMA_ALG_CRYPT]) &&
168 attrs[XFRMA_ALG_AEAD])
1da177e4 169 goto out;
35d2856b
MW		 170 if (attrs[XFRMA_TFCPAD] &&
171 p->mode != XFRM_MODE_TUNNEL)
172 goto out;
1da177e4
LT		 173 break;
174
175 case IPPROTO_COMP:
35a7aa08 176 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 177 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 178 attrs[XFRMA_ALG_AUTH] ||
4447bb33 179 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b
MW		 180 attrs[XFRMA_ALG_CRYPT] ||
181 attrs[XFRMA_TFCPAD])
1da177e4
LT		 182 goto out;
183 break;
184
e23c7194
MN		 185#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
186 case IPPROTO_DSTOPTS:
187 case IPPROTO_ROUTING:
35a7aa08
TG		 188 if (attrs[XFRMA_ALG_COMP] ||
189 attrs[XFRMA_ALG_AUTH] ||
4447bb33 190 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 191 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 192 attrs[XFRMA_ALG_CRYPT] ||
193 attrs[XFRMA_ENCAP] ||
194 attrs[XFRMA_SEC_CTX] ||
35d2856b 195 attrs[XFRMA_TFCPAD] ||
35a7aa08 196 !attrs[XFRMA_COADDR])
e23c7194
MN		 197 goto out;
198 break;
199#endif
200
1da177e4
LT		 201 default:
202 goto out;
3ff50b79 203 }
1da177e4 204
1a6509d9
HX		 205 if ((err = verify_aead(attrs)))
206 goto out;
4447bb33
MW		 207 if ((err = verify_auth_trunc(attrs)))
208 goto out;
35a7aa08 209 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 210 goto out;
35a7aa08 211 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 212 goto out;
35a7aa08 213 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 214 goto out;
35a7aa08 215 if ((err = verify_sec_ctx_len(attrs)))
df71837d 216 goto out;
1da177e4
LT		 217
218 err = -EINVAL;
219 switch (p->mode) {
7e49e6de
MN		 220 case XFRM_MODE_TRANSPORT:
221 case XFRM_MODE_TUNNEL:
060f02a3 222 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 223 case XFRM_MODE_BEET:
1da177e4
LT		 224 break;
225
226 default:
227 goto out;
3ff50b79 228 }
1da177e4
LT		 229
230 err = 0;
231
232out:
233 return err;
234}
235
236static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 237 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 238 struct nlattr *rta)
1da177e4 239{
1da177e4
LT		 240 struct xfrm_algo *p, *ualg;
241 struct xfrm_algo_desc *algo;
242
243 if (!rta)
244 return 0;
245
5424f32e 246 ualg = nla_data(rta);
1da177e4
LT		 247
248 algo = get_byname(ualg->alg_name, 1);
249 if (!algo)
250 return -ENOSYS;
251 *props = algo->desc.sadb_alg_id;
252
0f99be0d 253 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 254 if (!p)
255 return -ENOMEM;
256
04ff1260 257 strcpy(p->alg_name, algo->name);
1da177e4
LT		 258 *algpp = p;
259 return 0;
260}
261
4447bb33
MW		 262static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
263 struct nlattr *rta)
264{
265 struct xfrm_algo *ualg;
266 struct xfrm_algo_auth *p;
267 struct xfrm_algo_desc *algo;
268
269 if (!rta)
270 return 0;
271
272 ualg = nla_data(rta);
273
274 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
275 if (!algo)
276 return -ENOSYS;
277 *props = algo->desc.sadb_alg_id;
278
279 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
280 if (!p)
281 return -ENOMEM;
282
283 strcpy(p->alg_name, algo->name);
284 p->alg_key_len = ualg->alg_key_len;
285 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
286 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
287
288 *algpp = p;
289 return 0;
290}
291
292static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
293 struct nlattr *rta)
294{
295 struct xfrm_algo_auth *p, *ualg;
296 struct xfrm_algo_desc *algo;
297
298 if (!rta)
299 return 0;
300
301 ualg = nla_data(rta);
302
303 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
304 if (!algo)
305 return -ENOSYS;
fa6dd8a2
ND		 306 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
307 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 308 return -EINVAL;
309 *props = algo->desc.sadb_alg_id;
310
311 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
312 if (!p)
313 return -ENOMEM;
314
315 strcpy(p->alg_name, algo->name);
316 if (!p->alg_trunc_len)
317 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
318
319 *algpp = p;
320 return 0;
321}
322
1a6509d9
HX		 323static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
324 struct nlattr *rta)
325{
326 struct xfrm_algo_aead *p, *ualg;
327 struct xfrm_algo_desc *algo;
328
329 if (!rta)
330 return 0;
331
332 ualg = nla_data(rta);
333
334 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
335 if (!algo)
336 return -ENOSYS;
337 *props = algo->desc.sadb_alg_id;
338
339 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
340 if (!p)
341 return -ENOMEM;
342
343 strcpy(p->alg_name, algo->name);
344 *algpp = p;
345 return 0;
346}
347
661697f7 348static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 349{
df71837d
TJ		 350 int len = 0;
351
352 if (xfrm_ctx) {
353 len += sizeof(struct xfrm_user_sec_ctx);
354 len += xfrm_ctx->ctx_len;
355 }
356 return len;
357}
358
1da177e4
LT		 359static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
360{
361 memcpy(&x->id, &p->id, sizeof(x->id));
362 memcpy(&x->sel, &p->sel, sizeof(x->sel));
363 memcpy(&x->lft, &p->lft, sizeof(x->lft));
364 x->props.mode = p->mode;
365 x->props.replay_window = p->replay_window;
366 x->props.reqid = p->reqid;
367 x->props.family = p->family;
54489c14 368 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 369 x->props.flags = p->flags;
196b0036 370
ccf9b3b8 371 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 372 x->sel.family = p->family;
1da177e4
LT		 373}
374
d51d081d
JHS		 375/*
376 * someday when pfkey also has support, we could have the code
377 * somehow made shareable and move it to xfrm_state.c - JHS
378 *
379*/
5424f32e 380static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
d51d081d 381{
5424f32e
TG		 382 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
383 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
384 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
385 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d
JHS		 386
387 if (rp) {
388 struct xfrm_replay_state *replay;
5424f32e 389 replay = nla_data(rp);
d51d081d
JHS		 390 memcpy(&x->replay, replay, sizeof(*replay));
391 memcpy(&x->preplay, replay, sizeof(*replay));
392 }
393
394 if (lt) {
395 struct xfrm_lifetime_cur *ltime;
5424f32e 396 ltime = nla_data(lt);
d51d081d
JHS		 397 x->curlft.bytes = ltime->bytes;
398 x->curlft.packets = ltime->packets;
399 x->curlft.add_time = ltime->add_time;
400 x->curlft.use_time = ltime->use_time;
401 }
402
cf5cb79f 403 if (et)
5424f32e 404 x->replay_maxage = nla_get_u32(et);
d51d081d 405
cf5cb79f 406 if (rt)
5424f32e 407 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 408}
409
fc34acd3
AD		 410static struct xfrm_state *xfrm_state_construct(struct net *net,
411 struct xfrm_usersa_info *p,
5424f32e 412 struct nlattr **attrs,
1da177e4
LT		 413 int *errp)
414{
fc34acd3 415 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 416 int err = -ENOMEM;
417
418 if (!x)
419 goto error_no_put;
420
421 copy_from_user_state(x, p);
422
1a6509d9
HX		 423 if ((err = attach_aead(&x->aead, &x->props.ealgo,
424 attrs[XFRMA_ALG_AEAD])))
425 goto error;
4447bb33
MW		 426 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
427 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 428 goto error;
4447bb33
MW		 429 if (!x->props.aalgo) {
430 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
431 attrs[XFRMA_ALG_AUTH])))
432 goto error;
433 }
1da177e4
LT		 434 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
435 xfrm_ealg_get_byname,
35a7aa08 436 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 437 goto error;
438 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
439 xfrm_calg_get_byname,
35a7aa08 440 attrs[XFRMA_ALG_COMP])))
1da177e4 441 goto error;
fd21150a
TG		 442
443 if (attrs[XFRMA_ENCAP]) {
444 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
445 sizeof(*x->encap), GFP_KERNEL);
446 if (x->encap == NULL)
447 goto error;
448 }
449
35d2856b
MW		 450 if (attrs[XFRMA_TFCPAD])
451 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
452
fd21150a
TG		 453 if (attrs[XFRMA_COADDR]) {
454 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
455 sizeof(*x->coaddr), GFP_KERNEL);
456 if (x->coaddr == NULL)
457 goto error;
458 }
459
6f26b61e
JHS		 460 xfrm_mark_get(attrs, &x->mark);
461
72cb6962 462 err = xfrm_init_state(x);
1da177e4
LT		 463 if (err)
464 goto error;
465
fd21150a
TG		 466 if (attrs[XFRMA_SEC_CTX] &&
467 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 468 goto error;
469
1da177e4 470 x->km.seq = p->seq;
b27aeadb 471 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 472 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 473 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d
JHS		 474 x->preplay.bitmap = 0;
475 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
476 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
477
478 /* override default values from above */
479
5424f32e 480 xfrm_update_ae_params(x, attrs);
1da177e4
LT		 481
482 return x;
483
484error:
485 x->km.state = XFRM_STATE_DEAD;
486 xfrm_state_put(x);
487error_no_put:
488 *errp = err;
489 return NULL;
490}
491
22e70050 492static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 493 struct nlattr **attrs)
1da177e4 494{
fc34acd3 495 struct net *net = sock_net(skb->sk);
7b67c857 496 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 497 struct xfrm_state *x;
498 int err;
26b15dad 499 struct km_event c;
c53fa1ed
PM		 500 uid_t loginuid = audit_get_loginuid(current);
501 u32 sessionid = audit_get_sessionid(current);
502 u32 sid;
1da177e4 503
35a7aa08 504 err = verify_newsa_info(p, attrs);
1da177e4
LT		 505 if (err)
506 return err;
507
fc34acd3 508 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 509 if (!x)
510 return err;
511
26b15dad 512 xfrm_state_hold(x);
1da177e4
LT		 513 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
514 err = xfrm_state_add(x);
515 else
516 err = xfrm_state_update(x);
517
c53fa1ed 518 security_task_getsecid(current, &sid);
2532386f 519 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 520
1da177e4
LT		 521 if (err < 0) {
522 x->km.state = XFRM_STATE_DEAD;
21380b81 523 __xfrm_state_put(x);
7d6dfe1f 524 goto out;
1da177e4
LT		 525 }
526
26b15dad
JHS		 527 c.seq = nlh->nlmsg_seq;
528 c.pid = nlh->nlmsg_pid;
f60f6b8f 529 c.event = nlh->nlmsg_type;
26b15dad
JHS		 530
531 km_state_notify(x, &c);
7d6dfe1f 532out:
26b15dad 533 xfrm_state_put(x);
1da177e4
LT		 534 return err;
535}
536
fc34acd3
AD		 537static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
538 struct xfrm_usersa_id *p,
5424f32e 539 struct nlattr **attrs,
eb2971b6
MN		 540 int *errp)
541{
542 struct xfrm_state *x = NULL;
6f26b61e 543 struct xfrm_mark m;
eb2971b6 544 int err;
6f26b61e 545 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 546
547 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
548 err = -ESRCH;
6f26b61e 549 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 550 } else {
551 xfrm_address_t *saddr = NULL;
552
35a7aa08 553 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 554 if (!saddr) {
555 err = -EINVAL;
556 goto out;
557 }
558
9abbffee 559 err = -ESRCH;
6f26b61e
JHS		 560 x = xfrm_state_lookup_byaddr(net, mark,
561 &p->daddr, saddr,
221df1ed 562 p->proto, p->family);
eb2971b6
MN		 563 }
564
565 out:
566 if (!x && errp)
567 *errp = err;
568 return x;
569}
570
22e70050 571static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 572 struct nlattr **attrs)
1da177e4 573{
fc34acd3 574 struct net *net = sock_net(skb->sk);
1da177e4 575 struct xfrm_state *x;
eb2971b6 576 int err = -ESRCH;
26b15dad 577 struct km_event c;
7b67c857 578 struct xfrm_usersa_id *p = nlmsg_data(nlh);
c53fa1ed
PM		 579 uid_t loginuid = audit_get_loginuid(current);
580 u32 sessionid = audit_get_sessionid(current);
581 u32 sid;
1da177e4 582
fc34acd3 583 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 584 if (x == NULL)
eb2971b6 585 return err;
1da177e4 586
6f68dc37 587 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 588 goto out;
589
1da177e4 590 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 591 err = -EPERM;
592 goto out;
1da177e4
LT		 593 }
594
26b15dad 595 err = xfrm_state_delete(x);
161a09e7 596
c8c05a8e
CZ		 597 if (err < 0)
598 goto out;
26b15dad
JHS		 599
600 c.seq = nlh->nlmsg_seq;
601 c.pid = nlh->nlmsg_pid;
f60f6b8f 602 c.event = nlh->nlmsg_type;
26b15dad 603 km_state_notify(x, &c);
1da177e4 604
c8c05a8e 605out:
c53fa1ed 606 security_task_getsecid(current, &sid);
2532386f 607 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
c8c05a8e 608 xfrm_state_put(x);
26b15dad 609 return err;
1da177e4
LT		 610}
611
612static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
613{
614 memcpy(&p->id, &x->id, sizeof(p->id));
615 memcpy(&p->sel, &x->sel, sizeof(p->sel));
616 memcpy(&p->lft, &x->lft, sizeof(p->lft));
617 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
618 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 619 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 620 p->mode = x->props.mode;
621 p->replay_window = x->props.replay_window;
622 p->reqid = x->props.reqid;
623 p->family = x->props.family;
624 p->flags = x->props.flags;
625 p->seq = x->km.seq;
626}
627
628struct xfrm_dump_info {
629 struct sk_buff *in_skb;
630 struct sk_buff *out_skb;
631 u32 nlmsg_seq;
632 u16 nlmsg_flags;
1da177e4
LT		 633};
634
c0144bea
TG		 635static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
636{
c0144bea
TG		 637 struct xfrm_user_sec_ctx *uctx;
638 struct nlattr *attr;
68325d3b 639 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 640
641 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
642 if (attr == NULL)
643 return -EMSGSIZE;
644
645 uctx = nla_data(attr);
646 uctx->exttype = XFRMA_SEC_CTX;
647 uctx->len = ctx_size;
648 uctx->ctx_doi = s->ctx_doi;
649 uctx->ctx_alg = s->ctx_alg;
650 uctx->ctx_len = s->ctx_len;
651 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
652
653 return 0;
654}
655
4447bb33
MW		 656static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
657{
658 struct xfrm_algo *algo;
659 struct nlattr *nla;
660
661 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
662 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
663 if (!nla)
664 return -EMSGSIZE;
665
666 algo = nla_data(nla);
667 strcpy(algo->alg_name, auth->alg_name);
668 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
669 algo->alg_key_len = auth->alg_key_len;
670
671 return 0;
672}
673
68325d3b
HX		 674/* Don't change this without updating xfrm_sa_len! */
675static int copy_to_user_state_extra(struct xfrm_state *x,
676 struct xfrm_usersa_info *p,
677 struct sk_buff *skb)
1da177e4 678{
1da177e4
LT		 679 copy_to_user_state(x, p);
680
050f009e
HX		 681 if (x->coaddr)
682 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
683
684 if (x->lastused)
685 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
050f009e 686
1a6509d9
HX		 687 if (x->aead)
688 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
4447bb33
MW		 689 if (x->aalg) {
690 if (copy_to_user_auth(x->aalg, skb))
691 goto nla_put_failure;
692
693 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
694 xfrm_alg_auth_len(x->aalg), x->aalg);
695 }
1da177e4 696 if (x->ealg)
0f99be0d 697 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
1da177e4 698 if (x->calg)
c0144bea 699 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1da177e4
LT		 700
701 if (x->encap)
c0144bea 702 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1da177e4 703
35d2856b
MW		 704 if (x->tfcpad)
705 NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad);
706
6f26b61e
JHS		 707 if (xfrm_mark_put(skb, &x->mark))
708 goto nla_put_failure;
709
c0144bea
TG		 710 if (x->security && copy_sec_ctx(x->security, skb) < 0)
711 goto nla_put_failure;
060f02a3 712
68325d3b
HX		 713 return 0;
714
715nla_put_failure:
716 return -EMSGSIZE;
717}
718
719static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
720{
721 struct xfrm_dump_info *sp = ptr;
722 struct sk_buff *in_skb = sp->in_skb;
723 struct sk_buff *skb = sp->out_skb;
724 struct xfrm_usersa_info *p;
725 struct nlmsghdr *nlh;
726 int err;
727
68325d3b
HX		 728 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
729 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
730 if (nlh == NULL)
731 return -EMSGSIZE;
732
733 p = nlmsg_data(nlh);
734
735 err = copy_to_user_state_extra(x, p, skb);
736 if (err)
737 goto nla_put_failure;
738
9825069d 739 nlmsg_end(skb, nlh);
1da177e4
LT		 740 return 0;
741
c0144bea 742nla_put_failure:
9825069d 743 nlmsg_cancel(skb, nlh);
68325d3b 744 return err;
1da177e4
LT		 745}
746
4c563f76
TT		 747static int xfrm_dump_sa_done(struct netlink_callback *cb)
748{
749 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
750 xfrm_state_walk_done(walk);
751 return 0;
752}
753
1da177e4
LT		 754static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
755{
fc34acd3 756 struct net *net = sock_net(skb->sk);
4c563f76 757 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 758 struct xfrm_dump_info info;
759
4c563f76
TT		 760 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
761 sizeof(cb->args) - sizeof(cb->args[0]));
762
1da177e4
LT		 763 info.in_skb = cb->skb;
764 info.out_skb = skb;
765 info.nlmsg_seq = cb->nlh->nlmsg_seq;
766 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 767
768 if (!cb->args[0]) {
769 cb->args[0] = 1;
770 xfrm_state_walk_init(walk, 0);
771 }
772
fc34acd3 773 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 774
775 return skb->len;
776}
777
778static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
779 struct xfrm_state *x, u32 seq)
780{
781 struct xfrm_dump_info info;
782 struct sk_buff *skb;
783
7deb2264 784 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 785 if (!skb)
786 return ERR_PTR(-ENOMEM);
787
1da177e4
LT		 788 info.in_skb = in_skb;
789 info.out_skb = skb;
790 info.nlmsg_seq = seq;
791 info.nlmsg_flags = 0;
1da177e4
LT		 792
793 if (dump_one_state(x, 0, &info)) {
794 kfree_skb(skb);
795 return NULL;
796 }
797
798 return skb;
799}
800
7deb2264
TG		 801static inline size_t xfrm_spdinfo_msgsize(void)
802{
803 return NLMSG_ALIGN(4)
804 + nla_total_size(sizeof(struct xfrmu_spdinfo))
805 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
806}
807
e071041b
AD		 808static int build_spdinfo(struct sk_buff *skb, struct net *net,
809 u32 pid, u32 seq, u32 flags)
ecfd6b18 810{
5a6d3416
JHS		 811 struct xfrmk_spdinfo si;
812 struct xfrmu_spdinfo spc;
813 struct xfrmu_spdhinfo sph;
ecfd6b18
JHS		 814 struct nlmsghdr *nlh;
815 u32 *f;
816
817 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
818 if (nlh == NULL) /* shouldnt really happen ... */
819 return -EMSGSIZE;
820
821 f = nlmsg_data(nlh);
822 *f = flags;
e071041b 823 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 824 spc.incnt = si.incnt;
825 spc.outcnt = si.outcnt;
826 spc.fwdcnt = si.fwdcnt;
827 spc.inscnt = si.inscnt;
828 spc.outscnt = si.outscnt;
829 spc.fwdscnt = si.fwdscnt;
830 sph.spdhcnt = si.spdhcnt;
831 sph.spdhmcnt = si.spdhmcnt;
832
833 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
834 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
ecfd6b18
JHS		 835
836 return nlmsg_end(skb, nlh);
837
838nla_put_failure:
839 nlmsg_cancel(skb, nlh);
840 return -EMSGSIZE;
841}
842
843static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 844 struct nlattr **attrs)
ecfd6b18 845{
a6483b79 846 struct net *net = sock_net(skb->sk);
ecfd6b18 847 struct sk_buff *r_skb;
7b67c857 848 u32 *flags = nlmsg_data(nlh);
ecfd6b18
JHS		 849 u32 spid = NETLINK_CB(skb).pid;
850 u32 seq = nlh->nlmsg_seq;
ecfd6b18 851
7deb2264 852 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 853 if (r_skb == NULL)
854 return -ENOMEM;
855
e071041b 856 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
ecfd6b18
JHS		 857 BUG();
858
a6483b79 859 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
ecfd6b18
JHS		 860}
861
7deb2264
TG		 862static inline size_t xfrm_sadinfo_msgsize(void)
863{
864 return NLMSG_ALIGN(4)
865 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
866 + nla_total_size(4); /* XFRMA_SAD_CNT */
867}
868
e071041b
AD		 869static int build_sadinfo(struct sk_buff *skb, struct net *net,
870 u32 pid, u32 seq, u32 flags)
28d8909b 871{
af11e316
JHS		 872 struct xfrmk_sadinfo si;
873 struct xfrmu_sadhinfo sh;
28d8909b
JHS		 874 struct nlmsghdr *nlh;
875 u32 *f;
876
877 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
878 if (nlh == NULL) /* shouldnt really happen ... */
879 return -EMSGSIZE;
880
881 f = nlmsg_data(nlh);
882 *f = flags;
e071041b 883 xfrm_sad_getinfo(net, &si);
28d8909b 884
af11e316
JHS		 885 sh.sadhmcnt = si.sadhmcnt;
886 sh.sadhcnt = si.sadhcnt;
887
888 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
889 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
28d8909b
JHS		 890
891 return nlmsg_end(skb, nlh);
892
893nla_put_failure:
894 nlmsg_cancel(skb, nlh);
895 return -EMSGSIZE;
896}
897
898static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 899 struct nlattr **attrs)
28d8909b 900{
a6483b79 901 struct net *net = sock_net(skb->sk);
28d8909b 902 struct sk_buff *r_skb;
7b67c857 903 u32 *flags = nlmsg_data(nlh);
28d8909b
JHS		 904 u32 spid = NETLINK_CB(skb).pid;
905 u32 seq = nlh->nlmsg_seq;
28d8909b 906
7deb2264 907 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 908 if (r_skb == NULL)
909 return -ENOMEM;
910
e071041b 911 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
28d8909b
JHS		 912 BUG();
913
a6483b79 914 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
28d8909b
JHS		 915}
916
22e70050 917static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 918 struct nlattr **attrs)
1da177e4 919{
fc34acd3 920 struct net *net = sock_net(skb->sk);
7b67c857 921 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 922 struct xfrm_state *x;
923 struct sk_buff *resp_skb;
eb2971b6 924 int err = -ESRCH;
1da177e4 925
fc34acd3 926 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 927 if (x == NULL)
928 goto out_noput;
929
930 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
931 if (IS_ERR(resp_skb)) {
932 err = PTR_ERR(resp_skb);
933 } else {
a6483b79 934 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 935 }
936 xfrm_state_put(x);
937out_noput:
938 return err;
939}
940
941static int verify_userspi_info(struct xfrm_userspi_info *p)
942{
943 switch (p->info.id.proto) {
944 case IPPROTO_AH:
945 case IPPROTO_ESP:
946 break;
947
948 case IPPROTO_COMP:
949 /* IPCOMP spi is 16-bits. */
950 if (p->max >= 0x10000)
951 return -EINVAL;
952 break;
953
954 default:
955 return -EINVAL;
3ff50b79 956 }
1da177e4
LT		 957
958 if (p->min > p->max)
959 return -EINVAL;
960
961 return 0;
962}
963
22e70050 964static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 965 struct nlattr **attrs)
1da177e4 966{
fc34acd3 967 struct net *net = sock_net(skb->sk);
1da177e4
LT		 968 struct xfrm_state *x;
969 struct xfrm_userspi_info *p;
970 struct sk_buff *resp_skb;
971 xfrm_address_t *daddr;
972 int family;
973 int err;
6f26b61e
JHS		 974 u32 mark;
975 struct xfrm_mark m;
1da177e4 976
7b67c857 977 p = nlmsg_data(nlh);
1da177e4
LT		 978 err = verify_userspi_info(p);
979 if (err)
980 goto out_noput;
981
982 family = p->info.family;
983 daddr = &p->info.id.daddr;
984
985 x = NULL;
6f26b61e
JHS		 986
987 mark = xfrm_mark_get(attrs, &m);
1da177e4 988 if (p->info.seq) {
6f26b61e 989 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1da177e4
LT		 990 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
991 xfrm_state_put(x);
992 x = NULL;
993 }
994 }
995
996 if (!x)
6f26b61e 997 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 998 p->info.id.proto, daddr,
999 &p->info.saddr, 1,
1000 family);
1001 err = -ENOENT;
1002 if (x == NULL)
1003 goto out_noput;
1004
658b219e
HX		 1005 err = xfrm_alloc_spi(x, p->min, p->max);
1006 if (err)
1007 goto out;
1da177e4 1008
658b219e 1009 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1010 if (IS_ERR(resp_skb)) {
1011 err = PTR_ERR(resp_skb);
1012 goto out;
1013 }
1014
a6483b79 1015 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 1016
1017out:
1018 xfrm_state_put(x);
1019out_noput:
1020 return err;
1021}
1022
b798a9ed 1023static int verify_policy_dir(u8 dir)
1da177e4
LT		 1024{
1025 switch (dir) {
1026 case XFRM_POLICY_IN:
1027 case XFRM_POLICY_OUT:
1028 case XFRM_POLICY_FWD:
1029 break;
1030
1031 default:
1032 return -EINVAL;
3ff50b79 1033 }
1da177e4
LT		 1034
1035 return 0;
1036}
1037
b798a9ed 1038static int verify_policy_type(u8 type)
f7b6983f
MN		 1039{
1040 switch (type) {
1041 case XFRM_POLICY_TYPE_MAIN:
1042#ifdef CONFIG_XFRM_SUB_POLICY
1043 case XFRM_POLICY_TYPE_SUB:
1044#endif
1045 break;
1046
1047 default:
1048 return -EINVAL;
3ff50b79 1049 }
f7b6983f
MN		 1050
1051 return 0;
1052}
1053
1da177e4
LT		 1054static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1055{
1056 switch (p->share) {
1057 case XFRM_SHARE_ANY:
1058 case XFRM_SHARE_SESSION:
1059 case XFRM_SHARE_USER:
1060 case XFRM_SHARE_UNIQUE:
1061 break;
1062
1063 default:
1064 return -EINVAL;
3ff50b79 1065 }
1da177e4
LT		 1066
1067 switch (p->action) {
1068 case XFRM_POLICY_ALLOW:
1069 case XFRM_POLICY_BLOCK:
1070 break;
1071
1072 default:
1073 return -EINVAL;
3ff50b79 1074 }
1da177e4
LT		 1075
1076 switch (p->sel.family) {
1077 case AF_INET:
1078 break;
1079
1080 case AF_INET6:
1081#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1082 break;
1083#else
1084 return -EAFNOSUPPORT;
1085#endif
1086
1087 default:
1088 return -EINVAL;
3ff50b79 1089 }
1da177e4
LT		 1090
1091 return verify_policy_dir(p->dir);
1092}
1093
5424f32e 1094static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1095{
5424f32e 1096 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1097 struct xfrm_user_sec_ctx *uctx;
1098
1099 if (!rt)
1100 return 0;
1101
5424f32e 1102 uctx = nla_data(rt);
03e1ad7b 1103 return security_xfrm_policy_alloc(&pol->security, uctx);
df71837d
TJ		 1104}
1105
1da177e4
LT		 1106static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1107 int nr)
1108{
1109 int i;
1110
1111 xp->xfrm_nr = nr;
1112 for (i = 0; i < nr; i++, ut++) {
1113 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1114
1115 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1116 memcpy(&t->saddr, &ut->saddr,
1117 sizeof(xfrm_address_t));
1118 t->reqid = ut->reqid;
1119 t->mode = ut->mode;
1120 t->share = ut->share;
1121 t->optional = ut->optional;
1122 t->aalgos = ut->aalgos;
1123 t->ealgos = ut->ealgos;
1124 t->calgos = ut->calgos;
c5d18e98
HX		 1125 /* If all masks are ~0, then we allow all algorithms. */
1126 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1127 t->encap_family = ut->family;
1da177e4
LT		 1128 }
1129}
1130
b4ad86bf
DM		 1131static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1132{
1133 int i;
1134
1135 if (nr > XFRM_MAX_DEPTH)
1136 return -EINVAL;
1137
1138 for (i = 0; i < nr; i++) {
1139 /* We never validated the ut->family value, so many
1140 * applications simply leave it at zero. The check was
1141 * never made and ut->family was ignored because all
1142 * templates could be assumed to have the same family as
1143 * the policy itself. Now that we will have ipv4-in-ipv6
1144 * and ipv6-in-ipv4 tunnels, this is no longer true.
1145 */
1146 if (!ut[i].family)
1147 ut[i].family = family;
1148
1149 switch (ut[i].family) {
1150 case AF_INET:
1151 break;
1152#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1153 case AF_INET6:
1154 break;
1155#endif
1156 default:
1157 return -EINVAL;
3ff50b79 1158 }
b4ad86bf
DM		 1159 }
1160
1161 return 0;
1162}
1163
5424f32e 1164static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1165{
5424f32e 1166 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1167
1168 if (!rt) {
1169 pol->xfrm_nr = 0;
1170 } else {
5424f32e
TG		 1171 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1172 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1173 int err;
1da177e4 1174
b4ad86bf
DM		 1175 err = validate_tmpl(nr, utmpl, pol->family);
1176 if (err)
1177 return err;
1da177e4 1178
5424f32e 1179 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1180 }
1181 return 0;
1182}
1183
5424f32e 1184static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1185{
5424f32e 1186 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1187 struct xfrm_userpolicy_type *upt;
b798a9ed 1188 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1189 int err;
1190
1191 if (rt) {
5424f32e 1192 upt = nla_data(rt);
f7b6983f
MN		 1193 type = upt->type;
1194 }
1195
1196 err = verify_policy_type(type);
1197 if (err)
1198 return err;
1199
1200 *tp = type;
1201 return 0;
1202}
1203
1da177e4
LT		 1204static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1205{
1206 xp->priority = p->priority;
1207 xp->index = p->index;
1208 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1209 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1210 xp->action = p->action;
1211 xp->flags = p->flags;
1212 xp->family = p->sel.family;
1213 /* XXX xp->share = p->share; */
1214}
1215
1216static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1217{
1218 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1219 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1220 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1221 p->priority = xp->priority;
1222 p->index = xp->index;
1223 p->sel.family = xp->family;
1224 p->dir = dir;
1225 p->action = xp->action;
1226 p->flags = xp->flags;
1227 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1228}
1229
fc34acd3 1230static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1231{
fc34acd3 1232 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1233 int err;
1234
1235 if (!xp) {
1236 *errp = -ENOMEM;
1237 return NULL;
1238 }
1239
1240 copy_from_user_policy(xp, p);
df71837d 1241
35a7aa08 1242 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1243 if (err)
1244 goto error;
1245
35a7aa08
TG		 1246 if (!(err = copy_from_user_tmpl(xp, attrs)))
1247 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1248 if (err)
1249 goto error;
1da177e4 1250
295fae56
JHS		 1251 xfrm_mark_get(attrs, &xp->mark);
1252
1da177e4 1253 return xp;
f7b6983f
MN		 1254 error:
1255 *errp = err;
12a169e7 1256 xp->walk.dead = 1;
64c31b3f 1257 xfrm_policy_destroy(xp);
f7b6983f 1258 return NULL;
1da177e4
LT		 1259}
1260
22e70050 1261static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1262 struct nlattr **attrs)
1da177e4 1263{
fc34acd3 1264 struct net *net = sock_net(skb->sk);
7b67c857 1265 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1266 struct xfrm_policy *xp;
26b15dad 1267 struct km_event c;
1da177e4
LT		 1268 int err;
1269 int excl;
c53fa1ed
PM		 1270 uid_t loginuid = audit_get_loginuid(current);
1271 u32 sessionid = audit_get_sessionid(current);
1272 u32 sid;
1da177e4
LT		 1273
1274 err = verify_newpolicy_info(p);
df71837d
TJ		 1275 if (err)
1276 return err;
35a7aa08 1277 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1278 if (err)
1279 return err;
1280
fc34acd3 1281 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1282 if (!xp)
1283 return err;
1284
26b15dad
JHS		 1285 /* shouldnt excl be based on nlh flags??
1286 * Aha! this is anti-netlink really i.e more pfkey derived
1287 * in netlink excl is a flag and you wouldnt need
1288 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1289 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1290 err = xfrm_policy_insert(p->dir, xp, excl);
c53fa1ed 1291 security_task_getsecid(current, &sid);
2532386f 1292 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 1293
1da177e4 1294 if (err) {
03e1ad7b 1295 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1296 kfree(xp);
1297 return err;
1298 }
1299
f60f6b8f 1300 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1301 c.seq = nlh->nlmsg_seq;
1302 c.pid = nlh->nlmsg_pid;
1303 km_policy_notify(xp, p->dir, &c);
1304
1da177e4
LT		 1305 xfrm_pol_put(xp);
1306
1307 return 0;
1308}
1309
1310static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1311{
1312 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1313 int i;
1314
1315 if (xp->xfrm_nr == 0)
1316 return 0;
1317
1318 for (i = 0; i < xp->xfrm_nr; i++) {
1319 struct xfrm_user_tmpl *up = &vec[i];
1320 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1321
1322 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1323 up->family = kp->encap_family;
1da177e4
LT		 1324 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1325 up->reqid = kp->reqid;
1326 up->mode = kp->mode;
1327 up->share = kp->share;
1328 up->optional = kp->optional;
1329 up->aalgos = kp->aalgos;
1330 up->ealgos = kp->ealgos;
1331 up->calgos = kp->calgos;
1332 }
df71837d 1333
c0144bea
TG		 1334 return nla_put(skb, XFRMA_TMPL,
1335 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1336}
1337
1338static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1339{
1340 if (x->security) {
1341 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1342 }
1343 return 0;
0d681623 1344}
df71837d 1345
0d681623
SH		 1346static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1347{
1348 if (xp->security) {
1349 return copy_sec_ctx(xp->security, skb);
1350 }
1351 return 0;
df71837d 1352}
cfbfd45a
TG		 1353static inline size_t userpolicy_type_attrsize(void)
1354{
1355#ifdef CONFIG_XFRM_SUB_POLICY
1356 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1357#else
1358 return 0;
1359#endif
1360}
df71837d 1361
f7b6983f 1362#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1363static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1364{
c0144bea
TG		 1365 struct xfrm_userpolicy_type upt = {
1366 .type = type,
1367 };
f7b6983f 1368
c0144bea 1369 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1370}
1371
1372#else
b798a9ed 1373static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1374{
1375 return 0;
1376}
1377#endif
1378
1da177e4
LT		 1379static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1380{
1381 struct xfrm_dump_info *sp = ptr;
1382 struct xfrm_userpolicy_info *p;
1383 struct sk_buff *in_skb = sp->in_skb;
1384 struct sk_buff *skb = sp->out_skb;
1385 struct nlmsghdr *nlh;
1da177e4 1386
79b8b7f4
TG		 1387 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1388 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1389 if (nlh == NULL)
1390 return -EMSGSIZE;
1da177e4 1391
7b67c857 1392 p = nlmsg_data(nlh);
1da177e4
LT		 1393 copy_to_user_policy(xp, p, dir);
1394 if (copy_to_user_tmpl(xp, skb) < 0)
1395 goto nlmsg_failure;
df71837d
TJ		 1396 if (copy_to_user_sec_ctx(xp, skb))
1397 goto nlmsg_failure;
1459bb36 1398 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 1399 goto nlmsg_failure;
295fae56
JHS		 1400 if (xfrm_mark_put(skb, &xp->mark))
1401 goto nla_put_failure;
1da177e4 1402
9825069d 1403 nlmsg_end(skb, nlh);
1da177e4
LT		 1404 return 0;
1405
295fae56 1406nla_put_failure:
1da177e4 1407nlmsg_failure:
9825069d
TG		 1408 nlmsg_cancel(skb, nlh);
1409 return -EMSGSIZE;
1da177e4
LT		 1410}
1411
4c563f76
TT		 1412static int xfrm_dump_policy_done(struct netlink_callback *cb)
1413{
1414 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1415
1416 xfrm_policy_walk_done(walk);
1417 return 0;
1418}
1419
1da177e4
LT		 1420static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1421{
fc34acd3 1422 struct net *net = sock_net(skb->sk);
4c563f76 1423 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1424 struct xfrm_dump_info info;
1425
4c563f76
TT		 1426 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1427 sizeof(cb->args) - sizeof(cb->args[0]));
1428
1da177e4
LT		 1429 info.in_skb = cb->skb;
1430 info.out_skb = skb;
1431 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1432 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1433
1434 if (!cb->args[0]) {
1435 cb->args[0] = 1;
1436 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1437 }
1438
fc34acd3 1439 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1440
1441 return skb->len;
1442}
1443
1444static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1445 struct xfrm_policy *xp,
1446 int dir, u32 seq)
1447{
1448 struct xfrm_dump_info info;
1449 struct sk_buff *skb;
1450
7deb2264 1451 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1452 if (!skb)
1453 return ERR_PTR(-ENOMEM);
1454
1da177e4
LT		 1455 info.in_skb = in_skb;
1456 info.out_skb = skb;
1457 info.nlmsg_seq = seq;
1458 info.nlmsg_flags = 0;
1da177e4
LT		 1459
1460 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1461 kfree_skb(skb);
1462 return NULL;
1463 }
1464
1465 return skb;
1466}
1467
22e70050 1468static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1469 struct nlattr **attrs)
1da177e4 1470{
fc34acd3 1471 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1472 struct xfrm_policy *xp;
1473 struct xfrm_userpolicy_id *p;
b798a9ed 1474 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1475 int err;
26b15dad 1476 struct km_event c;
1da177e4 1477 int delete;
295fae56
JHS		 1478 struct xfrm_mark m;
1479 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1480
7b67c857 1481 p = nlmsg_data(nlh);
1da177e4
LT		 1482 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1483
35a7aa08 1484 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1485 if (err)
1486 return err;
1487
1da177e4
LT		 1488 err = verify_policy_dir(p->dir);
1489 if (err)
1490 return err;
1491
1492 if (p->index)
295fae56 1493 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1494 else {
5424f32e 1495 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1496 struct xfrm_sec_ctx *ctx;
df71837d 1497
35a7aa08 1498 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1499 if (err)
1500 return err;
1501
2c8dd116 1502 ctx = NULL;
df71837d 1503 if (rt) {
5424f32e 1504 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1505
03e1ad7b
PM		 1506 err = security_xfrm_policy_alloc(&ctx, uctx);
1507 if (err)
df71837d 1508 return err;
2c8dd116 1509 }
295fae56 1510 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1511 ctx, delete, &err);
03e1ad7b 1512 security_xfrm_policy_free(ctx);
df71837d 1513 }
1da177e4
LT		 1514 if (xp == NULL)
1515 return -ENOENT;
1516
1517 if (!delete) {
1518 struct sk_buff *resp_skb;
1519
1520 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1521 if (IS_ERR(resp_skb)) {
1522 err = PTR_ERR(resp_skb);
1523 } else {
a6483b79 1524 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
082a1ad5 1525 NETLINK_CB(skb).pid);
1da177e4 1526 }
26b15dad 1527 } else {
c53fa1ed
PM		 1528 uid_t loginuid = audit_get_loginuid(current);
1529 u32 sessionid = audit_get_sessionid(current);
1530 u32 sid;
2532386f 1531
c53fa1ed 1532 security_task_getsecid(current, &sid);
2532386f
EP		 1533 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1534 sid);
13fcfbb0
DM		 1535
1536 if (err != 0)
c8c05a8e 1537 goto out;
13fcfbb0 1538
e7443892 1539 c.data.byid = p->index;
f60f6b8f 1540 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1541 c.seq = nlh->nlmsg_seq;
1542 c.pid = nlh->nlmsg_pid;
1543 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1544 }
1545
c8c05a8e 1546out:
ef41aaa0 1547 xfrm_pol_put(xp);
1da177e4
LT		 1548 return err;
1549}
1550
22e70050 1551static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1552 struct nlattr **attrs)
1da177e4 1553{
fc34acd3 1554 struct net *net = sock_net(skb->sk);
26b15dad 1555 struct km_event c;
7b67c857 1556 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1557 struct xfrm_audit audit_info;
4aa2e62c 1558 int err;
1da177e4 1559
c53fa1ed
PM		 1560 audit_info.loginuid = audit_get_loginuid(current);
1561 audit_info.sessionid = audit_get_sessionid(current);
1562 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1563 err = xfrm_state_flush(net, p->proto, &audit_info);
9e64cc95
JHS		 1564 if (err) {
1565 if (err == -ESRCH) /* empty table */
1566 return 0;
069c474e 1567 return err;
9e64cc95 1568 }
bf08867f 1569 c.data.proto = p->proto;
f60f6b8f 1570 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1571 c.seq = nlh->nlmsg_seq;
1572 c.pid = nlh->nlmsg_pid;
7067802e 1573 c.net = net;
26b15dad
JHS		 1574 km_state_notify(NULL, &c);
1575
1da177e4
LT		 1576 return 0;
1577}
1578
7deb2264
TG		 1579static inline size_t xfrm_aevent_msgsize(void)
1580{
1581 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1582 + nla_total_size(sizeof(struct xfrm_replay_state))
1583 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1584 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1585 + nla_total_size(4) /* XFRM_AE_RTHR */
1586 + nla_total_size(4); /* XFRM_AE_ETHR */
1587}
d51d081d 1588
214e005b 1589static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1590{
1591 struct xfrm_aevent_id *id;
1592 struct nlmsghdr *nlh;
d51d081d 1593
79b8b7f4
TG		 1594 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1595 if (nlh == NULL)
1596 return -EMSGSIZE;
d51d081d 1597
7b67c857 1598 id = nlmsg_data(nlh);
2b5f6dcc 1599 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1600 id->sa_id.spi = x->id.spi;
1601 id->sa_id.family = x->props.family;
1602 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1603 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1604 id->reqid = x->props.reqid;
d51d081d
JHS		 1605 id->flags = c->data.aevent;
1606
c0144bea
TG		 1607 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1608 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
d51d081d 1609
c0144bea
TG		 1610 if (id->flags & XFRM_AE_RTHR)
1611 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
d51d081d 1612
c0144bea
TG		 1613 if (id->flags & XFRM_AE_ETHR)
1614 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1615 x->replay_maxage * 10 / HZ);
d51d081d 1616
6f26b61e
JHS		 1617 if (xfrm_mark_put(skb, &x->mark))
1618 goto nla_put_failure;
1619
9825069d 1620 return nlmsg_end(skb, nlh);
d51d081d 1621
c0144bea 1622nla_put_failure:
9825069d
TG		 1623 nlmsg_cancel(skb, nlh);
1624 return -EMSGSIZE;
d51d081d
JHS		 1625}
1626
22e70050 1627static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1628 struct nlattr **attrs)
d51d081d 1629{
fc34acd3 1630 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1631 struct xfrm_state *x;
1632 struct sk_buff *r_skb;
1633 int err;
1634 struct km_event c;
6f26b61e
JHS		 1635 u32 mark;
1636 struct xfrm_mark m;
7b67c857 1637 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1638 struct xfrm_usersa_id *id = &p->sa_id;
1639
7deb2264 1640 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 1641 if (r_skb == NULL)
1642 return -ENOMEM;
1643
6f26b61e
JHS		 1644 mark = xfrm_mark_get(attrs, &m);
1645
1646 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d51d081d 1647 if (x == NULL) {
b08d5840 1648 kfree_skb(r_skb);
d51d081d
JHS		 1649 return -ESRCH;
1650 }
1651
1652 /*
1653 * XXX: is this lock really needed - none of the other
1654 * gets lock (the concern is things getting updated
1655 * while we are still reading) - jhs
1656 */
1657 spin_lock_bh(&x->lock);
1658 c.data.aevent = p->flags;
1659 c.seq = nlh->nlmsg_seq;
1660 c.pid = nlh->nlmsg_pid;
1661
1662 if (build_aevent(r_skb, x, &c) < 0)
1663 BUG();
a6483b79 1664 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
d51d081d
JHS		 1665 spin_unlock_bh(&x->lock);
1666 xfrm_state_put(x);
1667 return err;
1668}
1669
22e70050 1670static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1671 struct nlattr **attrs)
d51d081d 1672{
fc34acd3 1673 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1674 struct xfrm_state *x;
1675 struct km_event c;
1676 int err = - EINVAL;
6f26b61e
JHS		 1677 u32 mark = 0;
1678 struct xfrm_mark m;
7b67c857 1679 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e
TG		 1680 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1681 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d
JHS		 1682
1683 if (!lt && !rp)
1684 return err;
1685
1686 /* pedantic mode - thou shalt sayeth replaceth */
1687 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1688 return err;
1689
6f26b61e
JHS		 1690 mark = xfrm_mark_get(attrs, &m);
1691
1692 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1693 if (x == NULL)
1694 return -ESRCH;
1695
1696 if (x->km.state != XFRM_STATE_VALID)
1697 goto out;
1698
1699 spin_lock_bh(&x->lock);
35a7aa08 1700 xfrm_update_ae_params(x, attrs);
d51d081d 1701 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1702
1703 c.event = nlh->nlmsg_type;
1704 c.seq = nlh->nlmsg_seq;
1705 c.pid = nlh->nlmsg_pid;
1706 c.data.aevent = XFRM_AE_CU;
1707 km_state_notify(x, &c);
1708 err = 0;
1709out:
1710 xfrm_state_put(x);
1711 return err;
1712}
1713
22e70050 1714static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1715 struct nlattr **attrs)
1da177e4 1716{
fc34acd3 1717 struct net *net = sock_net(skb->sk);
f7b6983f 1718 struct km_event c;
b798a9ed 1719 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1720 int err;
161a09e7 1721 struct xfrm_audit audit_info;
f7b6983f 1722
35a7aa08 1723 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1724 if (err)
1725 return err;
26b15dad 1726
c53fa1ed
PM		 1727 audit_info.loginuid = audit_get_loginuid(current);
1728 audit_info.sessionid = audit_get_sessionid(current);
1729 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1730 err = xfrm_policy_flush(net, type, &audit_info);
2f1eb65f
JHS		 1731 if (err) {
1732 if (err == -ESRCH) /* empty table */
1733 return 0;
069c474e 1734 return err;
2f1eb65f
JHS		 1735 }
1736
f7b6983f 1737 c.data.type = type;
f60f6b8f 1738 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1739 c.seq = nlh->nlmsg_seq;
1740 c.pid = nlh->nlmsg_pid;
7067802e 1741 c.net = net;
26b15dad 1742 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1743 return 0;
1744}
1745
22e70050 1746static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1747 struct nlattr **attrs)
6c5c8ca7 1748{
fc34acd3 1749 struct net *net = sock_net(skb->sk);
6c5c8ca7 1750 struct xfrm_policy *xp;
7b67c857 1751 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1752 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1753 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 1754 int err = -ENOENT;
295fae56
JHS		 1755 struct xfrm_mark m;
1756 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 1757
35a7aa08 1758 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1759 if (err)
1760 return err;
1761
c8bf4d04
TT		 1762 err = verify_policy_dir(p->dir);
1763 if (err)
1764 return err;
1765
6c5c8ca7 1766 if (p->index)
295fae56 1767 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 1768 else {
5424f32e 1769 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1770 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1771
35a7aa08 1772 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1773 if (err)
1774 return err;
1775
2c8dd116 1776 ctx = NULL;
6c5c8ca7 1777 if (rt) {
5424f32e 1778 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1779
03e1ad7b
PM		 1780 err = security_xfrm_policy_alloc(&ctx, uctx);
1781 if (err)
6c5c8ca7 1782 return err;
2c8dd116 1783 }
295fae56 1784 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 1785 &p->sel, ctx, 0, &err);
03e1ad7b 1786 security_xfrm_policy_free(ctx);
6c5c8ca7 1787 }
6c5c8ca7 1788 if (xp == NULL)
ef41aaa0 1789 return -ENOENT;
03e1ad7b 1790
ea2dea9d 1791 if (unlikely(xp->walk.dead))
6c5c8ca7 1792 goto out;
6c5c8ca7 1793
6c5c8ca7
JHS		 1794 err = 0;
1795 if (up->hard) {
c53fa1ed
PM		 1796 uid_t loginuid = audit_get_loginuid(current);
1797 u32 sessionid = audit_get_sessionid(current);
1798 u32 sid;
1799
1800 security_task_getsecid(current, &sid);
6c5c8ca7 1801 xfrm_policy_delete(xp, p->dir);
2532386f 1802 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
161a09e7 1803
6c5c8ca7
JHS		 1804 } else {
1805 // reset the timers here?
62db5cfd 1806 WARN(1, "Dont know what to do with soft policy expire\n");
6c5c8ca7
JHS		 1807 }
1808 km_policy_expired(xp, p->dir, up->hard, current->pid);
1809
1810out:
1811 xfrm_pol_put(xp);
1812 return err;
1813}
1814
22e70050 1815static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1816 struct nlattr **attrs)
53bc6b4d 1817{
fc34acd3 1818 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 1819 struct xfrm_state *x;
1820 int err;
7b67c857 1821 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 1822 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 1823 struct xfrm_mark m;
928497f0 1824 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 1825
6f26b61e 1826 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1827
3a765aa5 1828 err = -ENOENT;
53bc6b4d
JHS		 1829 if (x == NULL)
1830 return err;
1831
53bc6b4d 1832 spin_lock_bh(&x->lock);
3a765aa5 1833 err = -EINVAL;
53bc6b4d
JHS		 1834 if (x->km.state != XFRM_STATE_VALID)
1835 goto out;
1836 km_state_expired(x, ue->hard, current->pid);
1837
161a09e7 1838 if (ue->hard) {
c53fa1ed
PM		 1839 uid_t loginuid = audit_get_loginuid(current);
1840 u32 sessionid = audit_get_sessionid(current);
1841 u32 sid;
1842
1843 security_task_getsecid(current, &sid);
53bc6b4d 1844 __xfrm_state_delete(x);
2532386f 1845 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
161a09e7 1846 }
3a765aa5 1847 err = 0;
53bc6b4d
JHS		 1848out:
1849 spin_unlock_bh(&x->lock);
1850 xfrm_state_put(x);
1851 return err;
1852}
1853
22e70050 1854static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1855 struct nlattr **attrs)
980ebd25 1856{
fc34acd3 1857 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 1858 struct xfrm_policy *xp;
1859 struct xfrm_user_tmpl *ut;
1860 int i;
5424f32e 1861 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 1862 struct xfrm_mark mark;
980ebd25 1863
7b67c857 1864 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 1865 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 1866 int err = -ENOMEM;
1867
1868 if (!x)
d8eb9307 1869 goto nomem;
980ebd25 1870
6f26b61e
JHS		 1871 xfrm_mark_get(attrs, &mark);
1872
980ebd25 1873 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 1874 if (err)
1875 goto bad_policy;
980ebd25
JHS		 1876
1877 /* build an XP */
fc34acd3 1878 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 1879 if (!xp)
1880 goto free_state;
980ebd25
JHS		 1881
1882 memcpy(&x->id, &ua->id, sizeof(ua->id));
1883 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1884 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 1885 xp->mark.m = x->mark.m = mark.m;
1886 xp->mark.v = x->mark.v = mark.v;
5424f32e 1887 ut = nla_data(rt);
980ebd25
JHS		 1888 /* extract the templates and for each call km_key */
1889 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1890 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1891 memcpy(&x->id, &t->id, sizeof(x->id));
1892 x->props.mode = t->mode;
1893 x->props.reqid = t->reqid;
1894 x->props.family = ut->family;
1895 t->aalgos = ua->aalgos;
1896 t->ealgos = ua->ealgos;
1897 t->calgos = ua->calgos;
1898 err = km_query(x, t, xp);
1899
1900 }
1901
1902 kfree(x);
1903 kfree(xp);
1904
1905 return 0;
d8eb9307
IJ		 1906
1907bad_policy:
62db5cfd 1908 WARN(1, "BAD policy passed\n");
d8eb9307
IJ		 1909free_state:
1910 kfree(x);
1911nomem:
1912 return err;
980ebd25
JHS		 1913}
1914
5c79de6e 1915#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 1916static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 1917 struct xfrm_kmaddress *k,
5424f32e 1918 struct nlattr **attrs, int *num)
5c79de6e 1919{
5424f32e 1920 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 1921 struct xfrm_user_migrate *um;
1922 int i, num_migrate;
1923
13c1d189
AE		 1924 if (k != NULL) {
1925 struct xfrm_user_kmaddress *uk;
1926
1927 uk = nla_data(attrs[XFRMA_KMADDRESS]);
1928 memcpy(&k->local, &uk->local, sizeof(k->local));
1929 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
1930 k->family = uk->family;
1931 k->reserved = uk->reserved;
1932 }
1933
5424f32e
TG		 1934 um = nla_data(rt);
1935 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 1936
1937 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1938 return -EINVAL;
1939
1940 for (i = 0; i < num_migrate; i++, um++, ma++) {
1941 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1942 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1943 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1944 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1945
1946 ma->proto = um->proto;
1947 ma->mode = um->mode;
1948 ma->reqid = um->reqid;
1949
1950 ma->old_family = um->old_family;
1951 ma->new_family = um->new_family;
1952 }
1953
1954 *num = i;
1955 return 0;
1956}
1957
1958static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1959 struct nlattr **attrs)
5c79de6e 1960{
7b67c857 1961 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 1962 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 1963 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 1964 u8 type;
1965 int err;
1966 int n = 0;
1967
35a7aa08 1968 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 1969 return -EINVAL;
5c79de6e 1970
13c1d189
AE		 1971 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
1972
5424f32e 1973 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 1974 if (err)
1975 return err;
1976
13c1d189 1977 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 1978 if (err)
1979 return err;
1980
1981 if (!n)
1982 return 0;
1983
13c1d189 1984 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
5c79de6e
SS		 1985
1986 return 0;
1987}
1988#else
1989static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1990 struct nlattr **attrs)
5c79de6e
SS		 1991{
1992 return -ENOPROTOOPT;
1993}
1994#endif
1995
1996#ifdef CONFIG_XFRM_MIGRATE
183cad12 1997static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 1998{
1999 struct xfrm_user_migrate um;
2000
2001 memset(&um, 0, sizeof(um));
2002 um.proto = m->proto;
2003 um.mode = m->mode;
2004 um.reqid = m->reqid;
2005 um.old_family = m->old_family;
2006 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2007 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2008 um.new_family = m->new_family;
2009 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2010 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2011
c0144bea 2012 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2013}
2014
183cad12 2015static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2016{
2017 struct xfrm_user_kmaddress uk;
2018
2019 memset(&uk, 0, sizeof(uk));
2020 uk.family = k->family;
2021 uk.reserved = k->reserved;
2022 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2023 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2024
2025 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2026}
2027
2028static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 2029{
2030 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 2031 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2032 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2033 + userpolicy_type_attrsize();
7deb2264
TG		 2034}
2035
183cad12
DM		 2036static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2037 int num_migrate, const struct xfrm_kmaddress *k,
2038 const struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e 2039{
183cad12 2040 const struct xfrm_migrate *mp;
5c79de6e
SS		 2041 struct xfrm_userpolicy_id *pol_id;
2042 struct nlmsghdr *nlh;
5c79de6e
SS		 2043 int i;
2044
79b8b7f4
TG		 2045 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2046 if (nlh == NULL)
2047 return -EMSGSIZE;
5c79de6e 2048
7b67c857 2049 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2050 /* copy data from selector, dir, and type to the pol_id */
2051 memset(pol_id, 0, sizeof(*pol_id));
2052 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2053 pol_id->dir = dir;
2054
13c1d189
AE		 2055 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
2056 goto nlmsg_failure;
2057
5c79de6e
SS		 2058 if (copy_to_user_policy_type(type, skb) < 0)
2059 goto nlmsg_failure;
2060
2061 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2062 if (copy_to_user_migrate(mp, skb) < 0)
2063 goto nlmsg_failure;
2064 }
2065
9825069d 2066 return nlmsg_end(skb, nlh);
5c79de6e 2067nlmsg_failure:
9825069d
TG		 2068 nlmsg_cancel(skb, nlh);
2069 return -EMSGSIZE;
5c79de6e
SS		 2070}
2071
183cad12
DM		 2072static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2073 const struct xfrm_migrate *m, int num_migrate,
2074 const struct xfrm_kmaddress *k)
5c79de6e 2075{
a6483b79 2076 struct net *net = &init_net;
5c79de6e 2077 struct sk_buff *skb;
5c79de6e 2078
13c1d189 2079 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2080 if (skb == NULL)
2081 return -ENOMEM;
2082
2083 /* build migrate */
13c1d189 2084 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2085 BUG();
2086
a6483b79 2087 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 2088}
2089#else
183cad12
DM		 2090static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2091 const struct xfrm_migrate *m, int num_migrate,
2092 const struct xfrm_kmaddress *k)
5c79de6e
SS		 2093{
2094 return -ENOPROTOOPT;
2095}
2096#endif
d51d081d 2097
a7bd9a45 2098#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2099
2100static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2101 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2102 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2103 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2104 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2105 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2106 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2107 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2108 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2109 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2110 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2111 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2112 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2113 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2114 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2115 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2116 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2117 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2118 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 2119 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2120 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2121};
2122
492b558b
TG		 2123#undef XMSGSIZE
2124
cf5cb79f 2125static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2126 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2127 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2128 [XFRMA_LASTUSED] = { .type = NLA_U64},
2129 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2130 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2131 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2132 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2133 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2134 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2135 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2136 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2137 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2138 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2139 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2140 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2141 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2142 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2143 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2144 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2145 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2146 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2147 [XFRMA_TFCPAD] = { .type = NLA_U32 },
cf5cb79f
TG		 2148};
2149
1da177e4 2150static struct xfrm_link {
5424f32e 2151 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2152 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2153 int (*done)(struct netlink_callback *);
492b558b
TG		 2154} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2155 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2156 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2157 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2158 .dump = xfrm_dump_sa,
2159 .done = xfrm_dump_sa_done },
492b558b
TG		 2160 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2161 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2162 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2163 .dump = xfrm_dump_policy,
2164 .done = xfrm_dump_policy_done },
492b558b 2165 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2166 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2167 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2168 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2169 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2170 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2171 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2172 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2173 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2174 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2175 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2176 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 2177 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2178};
2179
1d00a4eb 2180static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2181{
a6483b79 2182 struct net *net = sock_net(skb->sk);
35a7aa08 2183 struct nlattr *attrs[XFRMA_MAX+1];
1da177e4 2184 struct xfrm_link *link;
a7bd9a45 2185 int type, err;
1da177e4 2186
1da177e4 2187 type = nlh->nlmsg_type;
1da177e4 2188 if (type > XFRM_MSG_MAX)
1d00a4eb 2189 return -EINVAL;
1da177e4
LT		 2190
2191 type -= XFRM_MSG_BASE;
2192 link = &xfrm_dispatch[type];
2193
2194 /* All operations require privileges, even GET */
1d00a4eb
TG		 2195 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2196 return -EPERM;
1da177e4 2197
492b558b
TG		 2198 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2199 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2200 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2201 if (link->dump == NULL)
1d00a4eb 2202 return -EINVAL;
88fc2c84 2203
a6483b79 2204 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
1da177e4
LT		 2205 }
2206
35a7aa08 2207 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2208 xfrma_policy);
a7bd9a45
TG		 2209 if (err < 0)
2210 return err;
1da177e4
LT		 2211
2212 if (link->doit == NULL)
1d00a4eb 2213 return -EINVAL;
1da177e4 2214
5424f32e 2215 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2216}
2217
cd40b7d3 2218static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2219{
cd40b7d3
DL		 2220 mutex_lock(&xfrm_cfg_mutex);
2221 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2222 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 2223}
2224
7deb2264
TG		 2225static inline size_t xfrm_expire_msgsize(void)
2226{
6f26b61e
JHS		 2227 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2228 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2229}
2230
214e005b 2231static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2232{
2233 struct xfrm_user_expire *ue;
2234 struct nlmsghdr *nlh;
1da177e4 2235
79b8b7f4
TG		 2236 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2237 if (nlh == NULL)
2238 return -EMSGSIZE;
1da177e4 2239
7b67c857 2240 ue = nlmsg_data(nlh);
1da177e4 2241 copy_to_user_state(x, &ue->state);
d51d081d 2242 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2243
6f26b61e
JHS		 2244 if (xfrm_mark_put(skb, &x->mark))
2245 goto nla_put_failure;
2246
9825069d 2247 return nlmsg_end(skb, nlh);
6f26b61e
JHS		 2248
2249nla_put_failure:
2250 return -EMSGSIZE;
1da177e4
LT		 2251}
2252
214e005b 2253static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2254{
fc34acd3 2255 struct net *net = xs_net(x);
1da177e4
LT		 2256 struct sk_buff *skb;
2257
7deb2264 2258 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2259 if (skb == NULL)
2260 return -ENOMEM;
2261
6f26b61e
JHS		 2262 if (build_expire(skb, x, c) < 0) {
2263 kfree_skb(skb);
2264 return -EMSGSIZE;
2265 }
1da177e4 2266
a6483b79 2267 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2268}
2269
214e005b 2270static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2271{
fc34acd3 2272 struct net *net = xs_net(x);
d51d081d 2273 struct sk_buff *skb;
d51d081d 2274
7deb2264 2275 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 2276 if (skb == NULL)
2277 return -ENOMEM;
2278
2279 if (build_aevent(skb, x, c) < 0)
2280 BUG();
2281
a6483b79 2282 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2283}
2284
214e005b 2285static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2286{
7067802e 2287 struct net *net = c->net;
26b15dad
JHS		 2288 struct xfrm_usersa_flush *p;
2289 struct nlmsghdr *nlh;
2290 struct sk_buff *skb;
7deb2264 2291 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2292
7deb2264 2293 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2294 if (skb == NULL)
2295 return -ENOMEM;
26b15dad 2296
79b8b7f4
TG		 2297 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2298 if (nlh == NULL) {
2299 kfree_skb(skb);
2300 return -EMSGSIZE;
2301 }
26b15dad 2302
7b67c857 2303 p = nlmsg_data(nlh);
bf08867f 2304 p->proto = c->data.proto;
26b15dad 2305
9825069d 2306 nlmsg_end(skb, nlh);
26b15dad 2307
a6483b79 2308 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2309}
2310
7deb2264 2311static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2312{
7deb2264 2313 size_t l = 0;
1a6509d9
HX		 2314 if (x->aead)
2315 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2316 if (x->aalg) {
2317 l += nla_total_size(sizeof(struct xfrm_algo) +
2318 (x->aalg->alg_key_len + 7) / 8);
2319 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2320 }
26b15dad 2321 if (x->ealg)
0f99be0d 2322 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2323 if (x->calg)
7deb2264 2324 l += nla_total_size(sizeof(*x->calg));
26b15dad 2325 if (x->encap)
7deb2264 2326 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2327 if (x->tfcpad)
2328 l += nla_total_size(sizeof(x->tfcpad));
68325d3b
HX		 2329 if (x->security)
2330 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2331 x->security->ctx_len);
2332 if (x->coaddr)
2333 l += nla_total_size(sizeof(*x->coaddr));
2334
d26f3984
HX		 2335 /* Must count x->lastused as it may become non-zero behind our back. */
2336 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2337
2338 return l;
2339}
2340
214e005b 2341static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2342{
fc34acd3 2343 struct net *net = xs_net(x);
26b15dad 2344 struct xfrm_usersa_info *p;
0603eac0 2345 struct xfrm_usersa_id *id;
26b15dad
JHS		 2346 struct nlmsghdr *nlh;
2347 struct sk_buff *skb;
26b15dad 2348 int len = xfrm_sa_len(x);
0603eac0
HX		 2349 int headlen;
2350
2351 headlen = sizeof(*p);
2352 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2353 len += nla_total_size(headlen);
0603eac0 2354 headlen = sizeof(*id);
6f26b61e 2355 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2356 }
7deb2264 2357 len += NLMSG_ALIGN(headlen);
26b15dad 2358
7deb2264 2359 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2360 if (skb == NULL)
2361 return -ENOMEM;
26b15dad 2362
79b8b7f4
TG		 2363 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2364 if (nlh == NULL)
c0144bea 2365 goto nla_put_failure;
26b15dad 2366
7b67c857 2367 p = nlmsg_data(nlh);
0603eac0 2368 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2369 struct nlattr *attr;
2370
7b67c857 2371 id = nlmsg_data(nlh);
0603eac0
HX		 2372 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2373 id->spi = x->id.spi;
2374 id->family = x->props.family;
2375 id->proto = x->id.proto;
2376
c0144bea
TG		 2377 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2378 if (attr == NULL)
2379 goto nla_put_failure;
2380
2381 p = nla_data(attr);
0603eac0
HX		 2382 }
2383
68325d3b
HX		 2384 if (copy_to_user_state_extra(x, p, skb))
2385 goto nla_put_failure;
26b15dad 2386
9825069d 2387 nlmsg_end(skb, nlh);
26b15dad 2388
a6483b79 2389 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2390
c0144bea 2391nla_put_failure:
68325d3b
HX		 2392 /* Somebody screwed up with xfrm_sa_len! */
2393 WARN_ON(1);
26b15dad
JHS		 2394 kfree_skb(skb);
2395 return -1;
2396}
2397
214e005b 2398static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2399{
2400
2401 switch (c->event) {
f60f6b8f 2402 case XFRM_MSG_EXPIRE:
26b15dad 2403 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2404 case XFRM_MSG_NEWAE:
2405 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2406 case XFRM_MSG_DELSA:
2407 case XFRM_MSG_UPDSA:
2408 case XFRM_MSG_NEWSA:
26b15dad 2409 return xfrm_notify_sa(x, c);
f60f6b8f 2410 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2411 return xfrm_notify_sa_flush(c);
2412 default:
62db5cfd 2413 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2414 c->event);
2415 break;
26b15dad
JHS		 2416 }
2417
2418 return 0;
2419
2420}
2421
7deb2264
TG		 2422static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2423 struct xfrm_policy *xp)
2424{
2425 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2426 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2427 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2428 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2429 + userpolicy_type_attrsize();
2430}
2431
1da177e4
LT		 2432static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2433 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2434 int dir)
2435{
2436 struct xfrm_user_acquire *ua;
2437 struct nlmsghdr *nlh;
1da177e4
LT		 2438 __u32 seq = xfrm_get_acqseq();
2439
79b8b7f4
TG		 2440 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2441 if (nlh == NULL)
2442 return -EMSGSIZE;
1da177e4 2443
7b67c857 2444 ua = nlmsg_data(nlh);
1da177e4
LT		 2445 memcpy(&ua->id, &x->id, sizeof(ua->id));
2446 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2447 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2448 copy_to_user_policy(xp, &ua->policy, dir);
2449 ua->aalgos = xt->aalgos;
2450 ua->ealgos = xt->ealgos;
2451 ua->calgos = xt->calgos;
2452 ua->seq = x->km.seq = seq;
2453
2454 if (copy_to_user_tmpl(xp, skb) < 0)
2455 goto nlmsg_failure;
0d681623 2456 if (copy_to_user_state_sec_ctx(x, skb))
df71837d 2457 goto nlmsg_failure;
1459bb36 2458 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2459 goto nlmsg_failure;
295fae56
JHS		 2460 if (xfrm_mark_put(skb, &xp->mark))
2461 goto nla_put_failure;
1da177e4 2462
9825069d 2463 return nlmsg_end(skb, nlh);
1da177e4 2464
295fae56 2465nla_put_failure:
1da177e4 2466nlmsg_failure:
9825069d
TG		 2467 nlmsg_cancel(skb, nlh);
2468 return -EMSGSIZE;
1da177e4
LT		 2469}
2470
2471static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2472 struct xfrm_policy *xp, int dir)
2473{
a6483b79 2474 struct net *net = xs_net(x);
1da177e4 2475 struct sk_buff *skb;
1da177e4 2476
7deb2264 2477 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2478 if (skb == NULL)
2479 return -ENOMEM;
2480
2481 if (build_acquire(skb, x, xt, xp, dir) < 0)
2482 BUG();
2483
a6483b79 2484 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2485}
2486
2487/* User gives us xfrm_user_policy_info followed by an array of 0
2488 * or more templates.
2489 */
cb969f07 2490static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2491 u8 *data, int len, int *dir)
2492{
fc34acd3 2493 struct net *net = sock_net(sk);
1da177e4
LT		 2494 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2495 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2496 struct xfrm_policy *xp;
2497 int nr;
2498
cb969f07 2499 switch (sk->sk_family) {
1da177e4
LT		 2500 case AF_INET:
2501 if (opt != IP_XFRM_POLICY) {
2502 *dir = -EOPNOTSUPP;
2503 return NULL;
2504 }
2505 break;
2506#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2507 case AF_INET6:
2508 if (opt != IPV6_XFRM_POLICY) {
2509 *dir = -EOPNOTSUPP;
2510 return NULL;
2511 }
2512 break;
2513#endif
2514 default:
2515 *dir = -EINVAL;
2516 return NULL;
2517 }
2518
2519 *dir = -EINVAL;
2520
2521 if (len < sizeof(*p) ||
2522 verify_newpolicy_info(p))
2523 return NULL;
2524
2525 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2526 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2527 return NULL;
2528
a4f1bac6
HX		 2529 if (p->dir > XFRM_POLICY_OUT)
2530 return NULL;
2531
2f09a4d5 2532 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2533 if (xp == NULL) {
2534 *dir = -ENOBUFS;
2535 return NULL;
2536 }
2537
2538 copy_from_user_policy(xp, p);
f7b6983f 2539 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2540 copy_templates(xp, ut, nr);
2541
2542 *dir = p->dir;
2543
2544 return xp;
2545}
2546
7deb2264
TG		 2547static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2548{
2549 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2550 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2551 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2552 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2553 + userpolicy_type_attrsize();
2554}
2555
1da177e4 2556static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2557 int dir, const struct km_event *c)
1da177e4
LT		 2558{
2559 struct xfrm_user_polexpire *upe;
2560 struct nlmsghdr *nlh;
d51d081d 2561 int hard = c->data.hard;
1da177e4 2562
79b8b7f4
TG		 2563 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2564 if (nlh == NULL)
2565 return -EMSGSIZE;
1da177e4 2566
7b67c857 2567 upe = nlmsg_data(nlh);
1da177e4
LT		 2568 copy_to_user_policy(xp, &upe->pol, dir);
2569 if (copy_to_user_tmpl(xp, skb) < 0)
2570 goto nlmsg_failure;
df71837d
TJ		 2571 if (copy_to_user_sec_ctx(xp, skb))
2572 goto nlmsg_failure;
1459bb36 2573 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2574 goto nlmsg_failure;
295fae56
JHS		 2575 if (xfrm_mark_put(skb, &xp->mark))
2576 goto nla_put_failure;
1da177e4
LT		 2577 upe->hard = !!hard;
2578
9825069d 2579 return nlmsg_end(skb, nlh);
1da177e4 2580
295fae56 2581nla_put_failure:
1da177e4 2582nlmsg_failure:
9825069d
TG		 2583 nlmsg_cancel(skb, nlh);
2584 return -EMSGSIZE;
1da177e4
LT		 2585}
2586
214e005b 2587static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2588{
fc34acd3 2589 struct net *net = xp_net(xp);
1da177e4 2590 struct sk_buff *skb;
1da177e4 2591
7deb2264 2592 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2593 if (skb == NULL)
2594 return -ENOMEM;
2595
d51d081d 2596 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2597 BUG();
2598
a6483b79 2599 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2600}
2601
214e005b 2602static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2603{
fc34acd3 2604 struct net *net = xp_net(xp);
26b15dad 2605 struct xfrm_userpolicy_info *p;
0603eac0 2606 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2607 struct nlmsghdr *nlh;
2608 struct sk_buff *skb;
7deb2264 2609 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
0603eac0
HX		 2610 int headlen;
2611
2612 headlen = sizeof(*p);
2613 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2614 len += nla_total_size(headlen);
0603eac0
HX		 2615 headlen = sizeof(*id);
2616 }
cfbfd45a 2617 len += userpolicy_type_attrsize();
295fae56 2618 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2619 len += NLMSG_ALIGN(headlen);
26b15dad 2620
7deb2264 2621 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2622 if (skb == NULL)
2623 return -ENOMEM;
26b15dad 2624
79b8b7f4
TG		 2625 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2626 if (nlh == NULL)
2627 goto nlmsg_failure;
26b15dad 2628
7b67c857 2629 p = nlmsg_data(nlh);
0603eac0 2630 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2631 struct nlattr *attr;
2632
7b67c857 2633 id = nlmsg_data(nlh);
0603eac0
HX		 2634 memset(id, 0, sizeof(*id));
2635 id->dir = dir;
2636 if (c->data.byid)
2637 id->index = xp->index;
2638 else
2639 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2640
c0144bea
TG		 2641 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2642 if (attr == NULL)
2643 goto nlmsg_failure;
2644
2645 p = nla_data(attr);
0603eac0 2646 }
26b15dad 2647
26b15dad
JHS		 2648 copy_to_user_policy(xp, p, dir);
2649 if (copy_to_user_tmpl(xp, skb) < 0)
2650 goto nlmsg_failure;
1459bb36 2651 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2652 goto nlmsg_failure;
26b15dad 2653
295fae56
JHS		 2654 if (xfrm_mark_put(skb, &xp->mark))
2655 goto nla_put_failure;
2656
9825069d 2657 nlmsg_end(skb, nlh);
26b15dad 2658
a6483b79 2659 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2660
295fae56 2661nla_put_failure:
26b15dad
JHS		 2662nlmsg_failure:
2663 kfree_skb(skb);
2664 return -1;
2665}
2666
214e005b 2667static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 2668{
7067802e 2669 struct net *net = c->net;
26b15dad
JHS		 2670 struct nlmsghdr *nlh;
2671 struct sk_buff *skb;
26b15dad 2672
7deb2264 2673 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2674 if (skb == NULL)
2675 return -ENOMEM;
26b15dad 2676
79b8b7f4
TG		 2677 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2678 if (nlh == NULL)
2679 goto nlmsg_failure;
0c51f53c
JHS		 2680 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2681 goto nlmsg_failure;
26b15dad 2682
9825069d 2683 nlmsg_end(skb, nlh);
26b15dad 2684
a6483b79 2685 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2686
2687nlmsg_failure:
2688 kfree_skb(skb);
2689 return -1;
2690}
2691
214e005b 2692static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2693{
2694
2695 switch (c->event) {
f60f6b8f
HX		 2696 case XFRM_MSG_NEWPOLICY:
2697 case XFRM_MSG_UPDPOLICY:
2698 case XFRM_MSG_DELPOLICY:
26b15dad 2699 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2700 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2701 return xfrm_notify_policy_flush(c);
f60f6b8f 2702 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2703 return xfrm_exp_policy_notify(xp, dir, c);
2704 default:
62db5cfd 2705 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2706 c->event);
26b15dad
JHS		 2707 }
2708
2709 return 0;
2710
2711}
2712
7deb2264
TG		 2713static inline size_t xfrm_report_msgsize(void)
2714{
2715 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2716}
2717
97a64b45
MN		 2718static int build_report(struct sk_buff *skb, u8 proto,
2719 struct xfrm_selector *sel, xfrm_address_t *addr)
2720{
2721 struct xfrm_user_report *ur;
2722 struct nlmsghdr *nlh;
97a64b45 2723
79b8b7f4
TG		 2724 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2725 if (nlh == NULL)
2726 return -EMSGSIZE;
97a64b45 2727
7b67c857 2728 ur = nlmsg_data(nlh);
97a64b45
MN		 2729 ur->proto = proto;
2730 memcpy(&ur->sel, sel, sizeof(ur->sel));
2731
2732 if (addr)
c0144bea 2733 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
97a64b45 2734
9825069d 2735 return nlmsg_end(skb, nlh);
97a64b45 2736
c0144bea 2737nla_put_failure:
9825069d
TG		 2738 nlmsg_cancel(skb, nlh);
2739 return -EMSGSIZE;
97a64b45
MN		 2740}
2741
db983c11
AD		 2742static int xfrm_send_report(struct net *net, u8 proto,
2743 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2744{
2745 struct sk_buff *skb;
97a64b45 2746
7deb2264 2747 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2748 if (skb == NULL)
2749 return -ENOMEM;
2750
2751 if (build_report(skb, proto, sel, addr) < 0)
2752 BUG();
2753
a6483b79 2754 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2755}
2756
3a2dfbe8
MW		 2757static inline size_t xfrm_mapping_msgsize(void)
2758{
2759 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2760}
2761
2762static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2763 xfrm_address_t *new_saddr, __be16 new_sport)
2764{
2765 struct xfrm_user_mapping *um;
2766 struct nlmsghdr *nlh;
2767
2768 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2769 if (nlh == NULL)
2770 return -EMSGSIZE;
2771
2772 um = nlmsg_data(nlh);
2773
2774 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2775 um->id.spi = x->id.spi;
2776 um->id.family = x->props.family;
2777 um->id.proto = x->id.proto;
2778 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2779 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2780 um->new_sport = new_sport;
2781 um->old_sport = x->encap->encap_sport;
2782 um->reqid = x->props.reqid;
2783
2784 return nlmsg_end(skb, nlh);
2785}
2786
2787static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2788 __be16 sport)
2789{
a6483b79 2790 struct net *net = xs_net(x);
3a2dfbe8
MW		 2791 struct sk_buff *skb;
2792
2793 if (x->id.proto != IPPROTO_ESP)
2794 return -EINVAL;
2795
2796 if (!x->encap)
2797 return -EINVAL;
2798
2799 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2800 if (skb == NULL)
2801 return -ENOMEM;
2802
2803 if (build_mapping(skb, x, ipaddr, sport) < 0)
2804 BUG();
2805
a6483b79 2806 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2807}
2808
1da177e4
LT		 2809static struct xfrm_mgr netlink_mgr = {
2810 .id = "netlink",
2811 .notify = xfrm_send_state_notify,
2812 .acquire = xfrm_send_acquire,
2813 .compile_policy = xfrm_compile_policy,
2814 .notify_policy = xfrm_send_policy_notify,
97a64b45 2815 .report = xfrm_send_report,
5c79de6e 2816 .migrate = xfrm_send_migrate,
3a2dfbe8 2817 .new_mapping = xfrm_send_mapping,
1da177e4
LT		 2818};
2819
a6483b79 2820static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 2821{
be33690d
PM		 2822 struct sock *nlsk;
2823
a6483b79 2824 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
af65bdfc 2825 xfrm_netlink_rcv, NULL, THIS_MODULE);
be33690d 2826 if (nlsk == NULL)
1da177e4 2827 return -ENOMEM;
d79d792e 2828 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
a6483b79 2829 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 2830 return 0;
2831}
2832
d79d792e 2833static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 2834{
d79d792e
EB		 2835 struct net *net;
2836 list_for_each_entry(net, net_exit_list, exit_list)
2837 rcu_assign_pointer(net->xfrm.nlsk, NULL);
2838 synchronize_net();
2839 list_for_each_entry(net, net_exit_list, exit_list)
2840 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 2841}
2842
a6483b79 2843static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 2844 .init = xfrm_user_net_init,
2845 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 2846};
2847
2848static int __init xfrm_user_init(void)
2849{
2850 int rv;
2851
2852 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2853
2854 rv = register_pernet_subsys(&xfrm_user_net_ops);
2855 if (rv < 0)
2856 return rv;
2857 rv = xfrm_register_km(&netlink_mgr);
2858 if (rv < 0)
2859 unregister_pernet_subsys(&xfrm_user_net_ops);
2860 return rv;
2861}
2862
2863static void __exit xfrm_user_exit(void)
2864{
2865 xfrm_unregister_km(&netlink_mgr);
2866 unregister_pernet_subsys(&xfrm_user_net_ops);
2867}
2868
1da177e4
LT		 2869module_init(xfrm_user_init);
2870module_exit(xfrm_user_exit);
2871MODULE_LICENSE("GPL");
4fdb3bb7 2872MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 2873
Linux 6.x block layer and io_uring tree(s)