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netlink: Rename pid to portid to avoid confusion
[GitHub/mt8127/android_kernel_alcatel_ttab.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>
dfd56b8b 31#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 32#include <linux/in6.h>
33#endif
1da177e4 34
1a6509d9
HX		 35static inline int aead_len(struct xfrm_algo_aead *alg)
36{
37 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
38}
39
5424f32e 40static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 41{
5424f32e 42 struct nlattr *rt = attrs[type];
1da177e4
LT		 43 struct xfrm_algo *algp;
44
45 if (!rt)
46 return 0;
47
5424f32e 48 algp = nla_data(rt);
0f99be0d 49 if (nla_len(rt) < xfrm_alg_len(algp))
31c26852
HX		 50 return -EINVAL;
51
1da177e4
LT		 52 switch (type) {
53 case XFRMA_ALG_AUTH:
1da177e4 54 case XFRMA_ALG_CRYPT:
1da177e4 55 case XFRMA_ALG_COMP:
1da177e4
LT		 56 break;
57
58 default:
59 return -EINVAL;
3ff50b79 60 }
1da177e4
LT		 61
62 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
63 return 0;
64}
65
4447bb33
MW		 66static int verify_auth_trunc(struct nlattr **attrs)
67{
68 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
69 struct xfrm_algo_auth *algp;
70
71 if (!rt)
72 return 0;
73
74 algp = nla_data(rt);
75 if (nla_len(rt) < xfrm_alg_auth_len(algp))
76 return -EINVAL;
77
78 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
79 return 0;
80}
81
1a6509d9
HX		 82static int verify_aead(struct nlattr **attrs)
83{
84 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
85 struct xfrm_algo_aead *algp;
86
87 if (!rt)
88 return 0;
89
90 algp = nla_data(rt);
91 if (nla_len(rt) < aead_len(algp))
92 return -EINVAL;
93
94 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
95 return 0;
96}
97
5424f32e 98static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 99 xfrm_address_t **addrp)
100{
5424f32e 101 struct nlattr *rt = attrs[type];
eb2971b6 102
cf5cb79f 103 if (rt && addrp)
5424f32e 104 *addrp = nla_data(rt);
eb2971b6 105}
df71837d 106
5424f32e 107static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 108{
5424f32e 109 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 110 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 111
112 if (!rt)
113 return 0;
114
5424f32e 115 uctx = nla_data(rt);
cf5cb79f 116 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 117 return -EINVAL;
118
119 return 0;
120}
121
d8647b79
SK		 122static inline int verify_replay(struct xfrm_usersa_info *p,
123 struct nlattr **attrs)
124{
125 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
126
7833aa05
SK		 127 if ((p->flags & XFRM_STATE_ESN) && !rt)
128 return -EINVAL;
129
d8647b79
SK		 130 if (!rt)
131 return 0;
132
02aadf72
SK		 133 if (p->id.proto != IPPROTO_ESP)
134 return -EINVAL;
135
d8647b79
SK		 136 if (p->replay_window != 0)
137 return -EINVAL;
138
139 return 0;
140}
df71837d 141
1da177e4 142static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 143 struct nlattr **attrs)
1da177e4
LT		 144{
145 int err;
146
147 err = -EINVAL;
148 switch (p->family) {
149 case AF_INET:
150 break;
151
152 case AF_INET6:
dfd56b8b 153#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 154 break;
155#else
156 err = -EAFNOSUPPORT;
157 goto out;
158#endif
159
160 default:
161 goto out;
3ff50b79 162 }
1da177e4
LT		 163
164 err = -EINVAL;
165 switch (p->id.proto) {
166 case IPPROTO_AH:
4447bb33
MW		 167 if ((!attrs[XFRMA_ALG_AUTH] &&
168 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 169 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 170 attrs[XFRMA_ALG_CRYPT] ||
35d2856b
MW		 171 attrs[XFRMA_ALG_COMP] ||
172 attrs[XFRMA_TFCPAD])
1da177e4
LT		 173 goto out;
174 break;
175
176 case IPPROTO_ESP:
1a6509d9
HX		 177 if (attrs[XFRMA_ALG_COMP])
178 goto out;
179 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 180 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 181 !attrs[XFRMA_ALG_CRYPT] &&
182 !attrs[XFRMA_ALG_AEAD])
183 goto out;
184 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 185 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 186 attrs[XFRMA_ALG_CRYPT]) &&
187 attrs[XFRMA_ALG_AEAD])
1da177e4 188 goto out;
35d2856b
MW		 189 if (attrs[XFRMA_TFCPAD] &&
190 p->mode != XFRM_MODE_TUNNEL)
191 goto out;
1da177e4
LT		 192 break;
193
194 case IPPROTO_COMP:
35a7aa08 195 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 196 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 197 attrs[XFRMA_ALG_AUTH] ||
4447bb33 198 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b
MW		 199 attrs[XFRMA_ALG_CRYPT] ||
200 attrs[XFRMA_TFCPAD])
1da177e4
LT		 201 goto out;
202 break;
203
dfd56b8b 204#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 205 case IPPROTO_DSTOPTS:
206 case IPPROTO_ROUTING:
35a7aa08
TG		 207 if (attrs[XFRMA_ALG_COMP] ||
208 attrs[XFRMA_ALG_AUTH] ||
4447bb33 209 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 210 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 211 attrs[XFRMA_ALG_CRYPT] ||
212 attrs[XFRMA_ENCAP] ||
213 attrs[XFRMA_SEC_CTX] ||
35d2856b 214 attrs[XFRMA_TFCPAD] ||
35a7aa08 215 !attrs[XFRMA_COADDR])
e23c7194
MN		 216 goto out;
217 break;
218#endif
219
1da177e4
LT		 220 default:
221 goto out;
3ff50b79 222 }
1da177e4 223
1a6509d9
HX		 224 if ((err = verify_aead(attrs)))
225 goto out;
4447bb33
MW		 226 if ((err = verify_auth_trunc(attrs)))
227 goto out;
35a7aa08 228 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 229 goto out;
35a7aa08 230 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 231 goto out;
35a7aa08 232 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 233 goto out;
35a7aa08 234 if ((err = verify_sec_ctx_len(attrs)))
df71837d 235 goto out;
d8647b79
SK		 236 if ((err = verify_replay(p, attrs)))
237 goto out;
1da177e4
LT		 238
239 err = -EINVAL;
240 switch (p->mode) {
7e49e6de
MN		 241 case XFRM_MODE_TRANSPORT:
242 case XFRM_MODE_TUNNEL:
060f02a3 243 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 244 case XFRM_MODE_BEET:
1da177e4
LT		 245 break;
246
247 default:
248 goto out;
3ff50b79 249 }
1da177e4
LT		 250
251 err = 0;
252
253out:
254 return err;
255}
256
257static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 258 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 259 struct nlattr *rta)
1da177e4 260{
1da177e4
LT		 261 struct xfrm_algo *p, *ualg;
262 struct xfrm_algo_desc *algo;
263
264 if (!rta)
265 return 0;
266
5424f32e 267 ualg = nla_data(rta);
1da177e4
LT		 268
269 algo = get_byname(ualg->alg_name, 1);
270 if (!algo)
271 return -ENOSYS;
272 *props = algo->desc.sadb_alg_id;
273
0f99be0d 274 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 275 if (!p)
276 return -ENOMEM;
277
04ff1260 278 strcpy(p->alg_name, algo->name);
1da177e4
LT		 279 *algpp = p;
280 return 0;
281}
282
4447bb33
MW		 283static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
284 struct nlattr *rta)
285{
286 struct xfrm_algo *ualg;
287 struct xfrm_algo_auth *p;
288 struct xfrm_algo_desc *algo;
289
290 if (!rta)
291 return 0;
292
293 ualg = nla_data(rta);
294
295 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
296 if (!algo)
297 return -ENOSYS;
298 *props = algo->desc.sadb_alg_id;
299
300 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
301 if (!p)
302 return -ENOMEM;
303
304 strcpy(p->alg_name, algo->name);
305 p->alg_key_len = ualg->alg_key_len;
306 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
307 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
308
309 *algpp = p;
310 return 0;
311}
312
313static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
314 struct nlattr *rta)
315{
316 struct xfrm_algo_auth *p, *ualg;
317 struct xfrm_algo_desc *algo;
318
319 if (!rta)
320 return 0;
321
322 ualg = nla_data(rta);
323
324 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
325 if (!algo)
326 return -ENOSYS;
fa6dd8a2
ND		 327 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
328 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 329 return -EINVAL;
330 *props = algo->desc.sadb_alg_id;
331
332 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
333 if (!p)
334 return -ENOMEM;
335
336 strcpy(p->alg_name, algo->name);
337 if (!p->alg_trunc_len)
338 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
339
340 *algpp = p;
341 return 0;
342}
343
1a6509d9
HX		 344static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
345 struct nlattr *rta)
346{
347 struct xfrm_algo_aead *p, *ualg;
348 struct xfrm_algo_desc *algo;
349
350 if (!rta)
351 return 0;
352
353 ualg = nla_data(rta);
354
355 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
356 if (!algo)
357 return -ENOSYS;
358 *props = algo->desc.sadb_alg_id;
359
360 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
361 if (!p)
362 return -ENOMEM;
363
364 strcpy(p->alg_name, algo->name);
365 *algpp = p;
366 return 0;
367}
368
e2b19125
SK		 369static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
370 struct nlattr *rp)
371{
372 struct xfrm_replay_state_esn *up;
373
374 if (!replay_esn || !rp)
375 return 0;
376
377 up = nla_data(rp);
378
379 if (xfrm_replay_state_esn_len(replay_esn) !=
380 xfrm_replay_state_esn_len(up))
381 return -EINVAL;
382
383 return 0;
384}
385
d8647b79
SK		 386static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
387 struct xfrm_replay_state_esn **preplay_esn,
388 struct nlattr *rta)
389{
390 struct xfrm_replay_state_esn *p, *pp, *up;
391
392 if (!rta)
393 return 0;
394
395 up = nla_data(rta);
396
397 p = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL);
398 if (!p)
399 return -ENOMEM;
400
401 pp = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL);
402 if (!pp) {
403 kfree(p);
404 return -ENOMEM;
405 }
406
407 *replay_esn = p;
408 *preplay_esn = pp;
409
410 return 0;
411}
412
661697f7 413static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 414{
df71837d
TJ		 415 int len = 0;
416
417 if (xfrm_ctx) {
418 len += sizeof(struct xfrm_user_sec_ctx);
419 len += xfrm_ctx->ctx_len;
420 }
421 return len;
422}
423
1da177e4
LT		 424static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
425{
426 memcpy(&x->id, &p->id, sizeof(x->id));
427 memcpy(&x->sel, &p->sel, sizeof(x->sel));
428 memcpy(&x->lft, &p->lft, sizeof(x->lft));
429 x->props.mode = p->mode;
430 x->props.replay_window = p->replay_window;
431 x->props.reqid = p->reqid;
432 x->props.family = p->family;
54489c14 433 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 434 x->props.flags = p->flags;
196b0036 435
ccf9b3b8 436 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 437 x->sel.family = p->family;
1da177e4
LT		 438}
439
d51d081d
JHS		 440/*
441 * someday when pfkey also has support, we could have the code
442 * somehow made shareable and move it to xfrm_state.c - JHS
443 *
444*/
5424f32e 445static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
d51d081d 446{
5424f32e 447 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 448 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e
TG		 449 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
450 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
451 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 452
d8647b79
SK		 453 if (re) {
454 struct xfrm_replay_state_esn *replay_esn;
455 replay_esn = nla_data(re);
456 memcpy(x->replay_esn, replay_esn,
457 xfrm_replay_state_esn_len(replay_esn));
458 memcpy(x->preplay_esn, replay_esn,
459 xfrm_replay_state_esn_len(replay_esn));
460 }
461
d51d081d
JHS		 462 if (rp) {
463 struct xfrm_replay_state *replay;
5424f32e 464 replay = nla_data(rp);
d51d081d
JHS		 465 memcpy(&x->replay, replay, sizeof(*replay));
466 memcpy(&x->preplay, replay, sizeof(*replay));
467 }
468
469 if (lt) {
470 struct xfrm_lifetime_cur *ltime;
5424f32e 471 ltime = nla_data(lt);
d51d081d
JHS		 472 x->curlft.bytes = ltime->bytes;
473 x->curlft.packets = ltime->packets;
474 x->curlft.add_time = ltime->add_time;
475 x->curlft.use_time = ltime->use_time;
476 }
477
cf5cb79f 478 if (et)
5424f32e 479 x->replay_maxage = nla_get_u32(et);
d51d081d 480
cf5cb79f 481 if (rt)
5424f32e 482 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 483}
484
fc34acd3
AD		 485static struct xfrm_state *xfrm_state_construct(struct net *net,
486 struct xfrm_usersa_info *p,
5424f32e 487 struct nlattr **attrs,
1da177e4
LT		 488 int *errp)
489{
fc34acd3 490 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 491 int err = -ENOMEM;
492
493 if (!x)
494 goto error_no_put;
495
496 copy_from_user_state(x, p);
497
1a6509d9
HX		 498 if ((err = attach_aead(&x->aead, &x->props.ealgo,
499 attrs[XFRMA_ALG_AEAD])))
500 goto error;
4447bb33
MW		 501 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
502 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 503 goto error;
4447bb33
MW		 504 if (!x->props.aalgo) {
505 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
506 attrs[XFRMA_ALG_AUTH])))
507 goto error;
508 }
1da177e4
LT		 509 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
510 xfrm_ealg_get_byname,
35a7aa08 511 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 512 goto error;
513 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
514 xfrm_calg_get_byname,
35a7aa08 515 attrs[XFRMA_ALG_COMP])))
1da177e4 516 goto error;
fd21150a
TG		 517
518 if (attrs[XFRMA_ENCAP]) {
519 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
520 sizeof(*x->encap), GFP_KERNEL);
521 if (x->encap == NULL)
522 goto error;
523 }
524
35d2856b
MW		 525 if (attrs[XFRMA_TFCPAD])
526 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
527
fd21150a
TG		 528 if (attrs[XFRMA_COADDR]) {
529 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
530 sizeof(*x->coaddr), GFP_KERNEL);
531 if (x->coaddr == NULL)
532 goto error;
533 }
534
6f26b61e
JHS		 535 xfrm_mark_get(attrs, &x->mark);
536
a454f0cc 537 err = __xfrm_init_state(x, false);
1da177e4
LT		 538 if (err)
539 goto error;
540
fd21150a
TG		 541 if (attrs[XFRMA_SEC_CTX] &&
542 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 543 goto error;
544
d8647b79
SK		 545 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
546 attrs[XFRMA_REPLAY_ESN_VAL])))
547 goto error;
548
1da177e4 549 x->km.seq = p->seq;
b27aeadb 550 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 551 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 552 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 553
9fdc4883
SK		 554 if ((err = xfrm_init_replay(x)))
555 goto error;
d51d081d 556
9fdc4883 557 /* override default values from above */
5424f32e 558 xfrm_update_ae_params(x, attrs);
1da177e4
LT		 559
560 return x;
561
562error:
563 x->km.state = XFRM_STATE_DEAD;
564 xfrm_state_put(x);
565error_no_put:
566 *errp = err;
567 return NULL;
568}
569
22e70050 570static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 571 struct nlattr **attrs)
1da177e4 572{
fc34acd3 573 struct net *net = sock_net(skb->sk);
7b67c857 574 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 575 struct xfrm_state *x;
576 int err;
26b15dad 577 struct km_event c;
c53fa1ed
PM		 578 uid_t loginuid = audit_get_loginuid(current);
579 u32 sessionid = audit_get_sessionid(current);
580 u32 sid;
1da177e4 581
35a7aa08 582 err = verify_newsa_info(p, attrs);
1da177e4
LT		 583 if (err)
584 return err;
585
fc34acd3 586 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 587 if (!x)
588 return err;
589
26b15dad 590 xfrm_state_hold(x);
1da177e4
LT		 591 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
592 err = xfrm_state_add(x);
593 else
594 err = xfrm_state_update(x);
595
c53fa1ed 596 security_task_getsecid(current, &sid);
2532386f 597 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 598
1da177e4
LT		 599 if (err < 0) {
600 x->km.state = XFRM_STATE_DEAD;
21380b81 601 __xfrm_state_put(x);
7d6dfe1f 602 goto out;
1da177e4
LT		 603 }
604
26b15dad 605 c.seq = nlh->nlmsg_seq;
15e47304 606 c.portid = nlh->nlmsg_pid;
f60f6b8f 607 c.event = nlh->nlmsg_type;
26b15dad
JHS		 608
609 km_state_notify(x, &c);
7d6dfe1f 610out:
26b15dad 611 xfrm_state_put(x);
1da177e4
LT		 612 return err;
613}
614
fc34acd3
AD		 615static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
616 struct xfrm_usersa_id *p,
5424f32e 617 struct nlattr **attrs,
eb2971b6
MN		 618 int *errp)
619{
620 struct xfrm_state *x = NULL;
6f26b61e 621 struct xfrm_mark m;
eb2971b6 622 int err;
6f26b61e 623 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 624
625 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
626 err = -ESRCH;
6f26b61e 627 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 628 } else {
629 xfrm_address_t *saddr = NULL;
630
35a7aa08 631 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 632 if (!saddr) {
633 err = -EINVAL;
634 goto out;
635 }
636
9abbffee 637 err = -ESRCH;
6f26b61e
JHS		 638 x = xfrm_state_lookup_byaddr(net, mark,
639 &p->daddr, saddr,
221df1ed 640 p->proto, p->family);
eb2971b6
MN		 641 }
642
643 out:
644 if (!x && errp)
645 *errp = err;
646 return x;
647}
648
22e70050 649static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 650 struct nlattr **attrs)
1da177e4 651{
fc34acd3 652 struct net *net = sock_net(skb->sk);
1da177e4 653 struct xfrm_state *x;
eb2971b6 654 int err = -ESRCH;
26b15dad 655 struct km_event c;
7b67c857 656 struct xfrm_usersa_id *p = nlmsg_data(nlh);
c53fa1ed
PM		 657 uid_t loginuid = audit_get_loginuid(current);
658 u32 sessionid = audit_get_sessionid(current);
659 u32 sid;
1da177e4 660
fc34acd3 661 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 662 if (x == NULL)
eb2971b6 663 return err;
1da177e4 664
6f68dc37 665 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 666 goto out;
667
1da177e4 668 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 669 err = -EPERM;
670 goto out;
1da177e4
LT		 671 }
672
26b15dad 673 err = xfrm_state_delete(x);
161a09e7 674
c8c05a8e
CZ		 675 if (err < 0)
676 goto out;
26b15dad
JHS		 677
678 c.seq = nlh->nlmsg_seq;
15e47304 679 c.portid = nlh->nlmsg_pid;
f60f6b8f 680 c.event = nlh->nlmsg_type;
26b15dad 681 km_state_notify(x, &c);
1da177e4 682
c8c05a8e 683out:
c53fa1ed 684 security_task_getsecid(current, &sid);
2532386f 685 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
c8c05a8e 686 xfrm_state_put(x);
26b15dad 687 return err;
1da177e4
LT		 688}
689
690static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
691{
692 memcpy(&p->id, &x->id, sizeof(p->id));
693 memcpy(&p->sel, &x->sel, sizeof(p->sel));
694 memcpy(&p->lft, &x->lft, sizeof(p->lft));
695 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
696 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 697 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 698 p->mode = x->props.mode;
699 p->replay_window = x->props.replay_window;
700 p->reqid = x->props.reqid;
701 p->family = x->props.family;
702 p->flags = x->props.flags;
703 p->seq = x->km.seq;
704}
705
706struct xfrm_dump_info {
707 struct sk_buff *in_skb;
708 struct sk_buff *out_skb;
709 u32 nlmsg_seq;
710 u16 nlmsg_flags;
1da177e4
LT		 711};
712
c0144bea
TG		 713static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
714{
c0144bea
TG		 715 struct xfrm_user_sec_ctx *uctx;
716 struct nlattr *attr;
68325d3b 717 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 718
719 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
720 if (attr == NULL)
721 return -EMSGSIZE;
722
723 uctx = nla_data(attr);
724 uctx->exttype = XFRMA_SEC_CTX;
725 uctx->len = ctx_size;
726 uctx->ctx_doi = s->ctx_doi;
727 uctx->ctx_alg = s->ctx_alg;
728 uctx->ctx_len = s->ctx_len;
729 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
730
731 return 0;
732}
733
4447bb33
MW		 734static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
735{
736 struct xfrm_algo *algo;
737 struct nlattr *nla;
738
739 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
740 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
741 if (!nla)
742 return -EMSGSIZE;
743
744 algo = nla_data(nla);
745 strcpy(algo->alg_name, auth->alg_name);
746 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
747 algo->alg_key_len = auth->alg_key_len;
748
749 return 0;
750}
751
68325d3b
HX		 752/* Don't change this without updating xfrm_sa_len! */
753static int copy_to_user_state_extra(struct xfrm_state *x,
754 struct xfrm_usersa_info *p,
755 struct sk_buff *skb)
1da177e4 756{
1d1e34dd 757 int ret = 0;
d0fde795 758
1d1e34dd 759 copy_to_user_state(x, p);
68325d3b 760
1d1e34dd
DM		 761 if (x->coaddr) {
762 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
763 if (ret)
764 goto out;
765 }
766 if (x->lastused) {
767 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
768 if (ret)
769 goto out;
770 }
771 if (x->aead) {
772 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
773 if (ret)
774 goto out;
775 }
776 if (x->aalg) {
777 ret = copy_to_user_auth(x->aalg, skb);
778 if (!ret)
779 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
780 xfrm_alg_auth_len(x->aalg), x->aalg);
781 if (ret)
782 goto out;
783 }
784 if (x->ealg) {
785 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
786 if (ret)
787 goto out;
788 }
789 if (x->calg) {
790 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
791 if (ret)
792 goto out;
793 }
794 if (x->encap) {
795 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
796 if (ret)
797 goto out;
798 }
799 if (x->tfcpad) {
800 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
801 if (ret)
802 goto out;
803 }
804 ret = xfrm_mark_put(skb, &x->mark);
805 if (ret)
806 goto out;
807 if (x->replay_esn) {
808 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
809 xfrm_replay_state_esn_len(x->replay_esn),
810 x->replay_esn);
811 if (ret)
812 goto out;
813 }
814 if (x->security)
815 ret = copy_sec_ctx(x->security, skb);
816out:
817 return ret;
68325d3b
HX		 818}
819
820static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
821{
822 struct xfrm_dump_info *sp = ptr;
823 struct sk_buff *in_skb = sp->in_skb;
824 struct sk_buff *skb = sp->out_skb;
825 struct xfrm_usersa_info *p;
826 struct nlmsghdr *nlh;
827 int err;
828
15e47304 829 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 830 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
831 if (nlh == NULL)
832 return -EMSGSIZE;
833
834 p = nlmsg_data(nlh);
835
836 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 837 if (err) {
838 nlmsg_cancel(skb, nlh);
839 return err;
840 }
9825069d 841 nlmsg_end(skb, nlh);
1da177e4 842 return 0;
1da177e4
LT		 843}
844
4c563f76
TT		 845static int xfrm_dump_sa_done(struct netlink_callback *cb)
846{
847 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
848 xfrm_state_walk_done(walk);
849 return 0;
850}
851
1da177e4
LT		 852static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
853{
fc34acd3 854 struct net *net = sock_net(skb->sk);
4c563f76 855 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 856 struct xfrm_dump_info info;
857
4c563f76
TT		 858 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
859 sizeof(cb->args) - sizeof(cb->args[0]));
860
1da177e4
LT		 861 info.in_skb = cb->skb;
862 info.out_skb = skb;
863 info.nlmsg_seq = cb->nlh->nlmsg_seq;
864 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 865
866 if (!cb->args[0]) {
867 cb->args[0] = 1;
868 xfrm_state_walk_init(walk, 0);
869 }
870
fc34acd3 871 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 872
873 return skb->len;
874}
875
876static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
877 struct xfrm_state *x, u32 seq)
878{
879 struct xfrm_dump_info info;
880 struct sk_buff *skb;
881
7deb2264 882 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 883 if (!skb)
884 return ERR_PTR(-ENOMEM);
885
1da177e4
LT		 886 info.in_skb = in_skb;
887 info.out_skb = skb;
888 info.nlmsg_seq = seq;
889 info.nlmsg_flags = 0;
1da177e4
LT		 890
891 if (dump_one_state(x, 0, &info)) {
892 kfree_skb(skb);
893 return NULL;
894 }
895
896 return skb;
897}
898
7deb2264
TG		 899static inline size_t xfrm_spdinfo_msgsize(void)
900{
901 return NLMSG_ALIGN(4)
902 + nla_total_size(sizeof(struct xfrmu_spdinfo))
903 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
904}
905
e071041b 906static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 907 u32 portid, u32 seq, u32 flags)
ecfd6b18 908{
5a6d3416
JHS		 909 struct xfrmk_spdinfo si;
910 struct xfrmu_spdinfo spc;
911 struct xfrmu_spdhinfo sph;
ecfd6b18 912 struct nlmsghdr *nlh;
1d1e34dd 913 int err;
ecfd6b18
JHS		 914 u32 *f;
915
15e47304 916 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 917 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 918 return -EMSGSIZE;
919
920 f = nlmsg_data(nlh);
921 *f = flags;
e071041b 922 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 923 spc.incnt = si.incnt;
924 spc.outcnt = si.outcnt;
925 spc.fwdcnt = si.fwdcnt;
926 spc.inscnt = si.inscnt;
927 spc.outscnt = si.outscnt;
928 spc.fwdscnt = si.fwdscnt;
929 sph.spdhcnt = si.spdhcnt;
930 sph.spdhmcnt = si.spdhmcnt;
931
1d1e34dd
DM		 932 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
933 if (!err)
934 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
935 if (err) {
936 nlmsg_cancel(skb, nlh);
937 return err;
938 }
ecfd6b18
JHS		 939
940 return nlmsg_end(skb, nlh);
ecfd6b18
JHS		 941}
942
943static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 944 struct nlattr **attrs)
ecfd6b18 945{
a6483b79 946 struct net *net = sock_net(skb->sk);
ecfd6b18 947 struct sk_buff *r_skb;
7b67c857 948 u32 *flags = nlmsg_data(nlh);
15e47304 949 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 950 u32 seq = nlh->nlmsg_seq;
ecfd6b18 951
7deb2264 952 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 953 if (r_skb == NULL)
954 return -ENOMEM;
955
15e47304 956 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
ecfd6b18
JHS		 957 BUG();
958
15e47304 959 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 960}
961
7deb2264
TG		 962static inline size_t xfrm_sadinfo_msgsize(void)
963{
964 return NLMSG_ALIGN(4)
965 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
966 + nla_total_size(4); /* XFRMA_SAD_CNT */
967}
968
e071041b 969static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 970 u32 portid, u32 seq, u32 flags)
28d8909b 971{
af11e316
JHS		 972 struct xfrmk_sadinfo si;
973 struct xfrmu_sadhinfo sh;
28d8909b 974 struct nlmsghdr *nlh;
1d1e34dd 975 int err;
28d8909b
JHS		 976 u32 *f;
977
15e47304 978 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 979 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 980 return -EMSGSIZE;
981
982 f = nlmsg_data(nlh);
983 *f = flags;
e071041b 984 xfrm_sad_getinfo(net, &si);
28d8909b 985
af11e316
JHS		 986 sh.sadhmcnt = si.sadhmcnt;
987 sh.sadhcnt = si.sadhcnt;
988
1d1e34dd
DM		 989 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
990 if (!err)
991 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
992 if (err) {
993 nlmsg_cancel(skb, nlh);
994 return err;
995 }
28d8909b
JHS		 996
997 return nlmsg_end(skb, nlh);
28d8909b
JHS		 998}
999
1000static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1001 struct nlattr **attrs)
28d8909b 1002{
a6483b79 1003 struct net *net = sock_net(skb->sk);
28d8909b 1004 struct sk_buff *r_skb;
7b67c857 1005 u32 *flags = nlmsg_data(nlh);
15e47304 1006 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1007 u32 seq = nlh->nlmsg_seq;
28d8909b 1008
7deb2264 1009 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1010 if (r_skb == NULL)
1011 return -ENOMEM;
1012
15e47304 1013 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
28d8909b
JHS		 1014 BUG();
1015
15e47304 1016 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1017}
1018
22e70050 1019static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1020 struct nlattr **attrs)
1da177e4 1021{
fc34acd3 1022 struct net *net = sock_net(skb->sk);
7b67c857 1023 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1024 struct xfrm_state *x;
1025 struct sk_buff *resp_skb;
eb2971b6 1026 int err = -ESRCH;
1da177e4 1027
fc34acd3 1028 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1029 if (x == NULL)
1030 goto out_noput;
1031
1032 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1033 if (IS_ERR(resp_skb)) {
1034 err = PTR_ERR(resp_skb);
1035 } else {
15e47304 1036 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1037 }
1038 xfrm_state_put(x);
1039out_noput:
1040 return err;
1041}
1042
1043static int verify_userspi_info(struct xfrm_userspi_info *p)
1044{
1045 switch (p->info.id.proto) {
1046 case IPPROTO_AH:
1047 case IPPROTO_ESP:
1048 break;
1049
1050 case IPPROTO_COMP:
1051 /* IPCOMP spi is 16-bits. */
1052 if (p->max >= 0x10000)
1053 return -EINVAL;
1054 break;
1055
1056 default:
1057 return -EINVAL;
3ff50b79 1058 }
1da177e4
LT		 1059
1060 if (p->min > p->max)
1061 return -EINVAL;
1062
1063 return 0;
1064}
1065
22e70050 1066static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1067 struct nlattr **attrs)
1da177e4 1068{
fc34acd3 1069 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1070 struct xfrm_state *x;
1071 struct xfrm_userspi_info *p;
1072 struct sk_buff *resp_skb;
1073 xfrm_address_t *daddr;
1074 int family;
1075 int err;
6f26b61e
JHS		 1076 u32 mark;
1077 struct xfrm_mark m;
1da177e4 1078
7b67c857 1079 p = nlmsg_data(nlh);
1da177e4
LT		 1080 err = verify_userspi_info(p);
1081 if (err)
1082 goto out_noput;
1083
1084 family = p->info.family;
1085 daddr = &p->info.id.daddr;
1086
1087 x = NULL;
6f26b61e
JHS		 1088
1089 mark = xfrm_mark_get(attrs, &m);
1da177e4 1090 if (p->info.seq) {
6f26b61e 1091 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
1da177e4
LT		 1092 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
1093 xfrm_state_put(x);
1094 x = NULL;
1095 }
1096 }
1097
1098 if (!x)
6f26b61e 1099 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1100 p->info.id.proto, daddr,
1101 &p->info.saddr, 1,
1102 family);
1103 err = -ENOENT;
1104 if (x == NULL)
1105 goto out_noput;
1106
658b219e
HX		 1107 err = xfrm_alloc_spi(x, p->min, p->max);
1108 if (err)
1109 goto out;
1da177e4 1110
658b219e 1111 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1112 if (IS_ERR(resp_skb)) {
1113 err = PTR_ERR(resp_skb);
1114 goto out;
1115 }
1116
15e47304 1117 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1118
1119out:
1120 xfrm_state_put(x);
1121out_noput:
1122 return err;
1123}
1124
b798a9ed 1125static int verify_policy_dir(u8 dir)
1da177e4
LT		 1126{
1127 switch (dir) {
1128 case XFRM_POLICY_IN:
1129 case XFRM_POLICY_OUT:
1130 case XFRM_POLICY_FWD:
1131 break;
1132
1133 default:
1134 return -EINVAL;
3ff50b79 1135 }
1da177e4
LT		 1136
1137 return 0;
1138}
1139
b798a9ed 1140static int verify_policy_type(u8 type)
f7b6983f
MN		 1141{
1142 switch (type) {
1143 case XFRM_POLICY_TYPE_MAIN:
1144#ifdef CONFIG_XFRM_SUB_POLICY
1145 case XFRM_POLICY_TYPE_SUB:
1146#endif
1147 break;
1148
1149 default:
1150 return -EINVAL;
3ff50b79 1151 }
f7b6983f
MN		 1152
1153 return 0;
1154}
1155
1da177e4
LT		 1156static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1157{
1158 switch (p->share) {
1159 case XFRM_SHARE_ANY:
1160 case XFRM_SHARE_SESSION:
1161 case XFRM_SHARE_USER:
1162 case XFRM_SHARE_UNIQUE:
1163 break;
1164
1165 default:
1166 return -EINVAL;
3ff50b79 1167 }
1da177e4
LT		 1168
1169 switch (p->action) {
1170 case XFRM_POLICY_ALLOW:
1171 case XFRM_POLICY_BLOCK:
1172 break;
1173
1174 default:
1175 return -EINVAL;
3ff50b79 1176 }
1da177e4
LT		 1177
1178 switch (p->sel.family) {
1179 case AF_INET:
1180 break;
1181
1182 case AF_INET6:
dfd56b8b 1183#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1184 break;
1185#else
1186 return -EAFNOSUPPORT;
1187#endif
1188
1189 default:
1190 return -EINVAL;
3ff50b79 1191 }
1da177e4
LT		 1192
1193 return verify_policy_dir(p->dir);
1194}
1195
5424f32e 1196static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1197{
5424f32e 1198 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1199 struct xfrm_user_sec_ctx *uctx;
1200
1201 if (!rt)
1202 return 0;
1203
5424f32e 1204 uctx = nla_data(rt);
03e1ad7b 1205 return security_xfrm_policy_alloc(&pol->security, uctx);
df71837d
TJ		 1206}
1207
1da177e4
LT		 1208static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1209 int nr)
1210{
1211 int i;
1212
1213 xp->xfrm_nr = nr;
1214 for (i = 0; i < nr; i++, ut++) {
1215 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1216
1217 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1218 memcpy(&t->saddr, &ut->saddr,
1219 sizeof(xfrm_address_t));
1220 t->reqid = ut->reqid;
1221 t->mode = ut->mode;
1222 t->share = ut->share;
1223 t->optional = ut->optional;
1224 t->aalgos = ut->aalgos;
1225 t->ealgos = ut->ealgos;
1226 t->calgos = ut->calgos;
c5d18e98
HX		 1227 /* If all masks are ~0, then we allow all algorithms. */
1228 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1229 t->encap_family = ut->family;
1da177e4
LT		 1230 }
1231}
1232
b4ad86bf
DM		 1233static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1234{
1235 int i;
1236
1237 if (nr > XFRM_MAX_DEPTH)
1238 return -EINVAL;
1239
1240 for (i = 0; i < nr; i++) {
1241 /* We never validated the ut->family value, so many
1242 * applications simply leave it at zero. The check was
1243 * never made and ut->family was ignored because all
1244 * templates could be assumed to have the same family as
1245 * the policy itself. Now that we will have ipv4-in-ipv6
1246 * and ipv6-in-ipv4 tunnels, this is no longer true.
1247 */
1248 if (!ut[i].family)
1249 ut[i].family = family;
1250
1251 switch (ut[i].family) {
1252 case AF_INET:
1253 break;
dfd56b8b 1254#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1255 case AF_INET6:
1256 break;
1257#endif
1258 default:
1259 return -EINVAL;
3ff50b79 1260 }
b4ad86bf
DM		 1261 }
1262
1263 return 0;
1264}
1265
5424f32e 1266static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1267{
5424f32e 1268 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1269
1270 if (!rt) {
1271 pol->xfrm_nr = 0;
1272 } else {
5424f32e
TG		 1273 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1274 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1275 int err;
1da177e4 1276
b4ad86bf
DM		 1277 err = validate_tmpl(nr, utmpl, pol->family);
1278 if (err)
1279 return err;
1da177e4 1280
5424f32e 1281 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1282 }
1283 return 0;
1284}
1285
5424f32e 1286static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1287{
5424f32e 1288 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1289 struct xfrm_userpolicy_type *upt;
b798a9ed 1290 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1291 int err;
1292
1293 if (rt) {
5424f32e 1294 upt = nla_data(rt);
f7b6983f
MN		 1295 type = upt->type;
1296 }
1297
1298 err = verify_policy_type(type);
1299 if (err)
1300 return err;
1301
1302 *tp = type;
1303 return 0;
1304}
1305
1da177e4
LT		 1306static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1307{
1308 xp->priority = p->priority;
1309 xp->index = p->index;
1310 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1311 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1312 xp->action = p->action;
1313 xp->flags = p->flags;
1314 xp->family = p->sel.family;
1315 /* XXX xp->share = p->share; */
1316}
1317
1318static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1319{
1320 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1321 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1322 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1323 p->priority = xp->priority;
1324 p->index = xp->index;
1325 p->sel.family = xp->family;
1326 p->dir = dir;
1327 p->action = xp->action;
1328 p->flags = xp->flags;
1329 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1330}
1331
fc34acd3 1332static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1333{
fc34acd3 1334 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1335 int err;
1336
1337 if (!xp) {
1338 *errp = -ENOMEM;
1339 return NULL;
1340 }
1341
1342 copy_from_user_policy(xp, p);
df71837d 1343
35a7aa08 1344 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1345 if (err)
1346 goto error;
1347
35a7aa08
TG		 1348 if (!(err = copy_from_user_tmpl(xp, attrs)))
1349 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1350 if (err)
1351 goto error;
1da177e4 1352
295fae56
JHS		 1353 xfrm_mark_get(attrs, &xp->mark);
1354
1da177e4 1355 return xp;
f7b6983f
MN		 1356 error:
1357 *errp = err;
12a169e7 1358 xp->walk.dead = 1;
64c31b3f 1359 xfrm_policy_destroy(xp);
f7b6983f 1360 return NULL;
1da177e4
LT		 1361}
1362
22e70050 1363static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1364 struct nlattr **attrs)
1da177e4 1365{
fc34acd3 1366 struct net *net = sock_net(skb->sk);
7b67c857 1367 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1368 struct xfrm_policy *xp;
26b15dad 1369 struct km_event c;
1da177e4
LT		 1370 int err;
1371 int excl;
c53fa1ed
PM		 1372 uid_t loginuid = audit_get_loginuid(current);
1373 u32 sessionid = audit_get_sessionid(current);
1374 u32 sid;
1da177e4
LT		 1375
1376 err = verify_newpolicy_info(p);
df71837d
TJ		 1377 if (err)
1378 return err;
35a7aa08 1379 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1380 if (err)
1381 return err;
1382
fc34acd3 1383 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1384 if (!xp)
1385 return err;
1386
25985edc 1387 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1388 * Aha! this is anti-netlink really i.e more pfkey derived
1389 * in netlink excl is a flag and you wouldnt need
1390 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1391 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1392 err = xfrm_policy_insert(p->dir, xp, excl);
c53fa1ed 1393 security_task_getsecid(current, &sid);
2532386f 1394 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 1395
1da177e4 1396 if (err) {
03e1ad7b 1397 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1398 kfree(xp);
1399 return err;
1400 }
1401
f60f6b8f 1402 c.event = nlh->nlmsg_type;
26b15dad 1403 c.seq = nlh->nlmsg_seq;
15e47304 1404 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1405 km_policy_notify(xp, p->dir, &c);
1406
1da177e4
LT		 1407 xfrm_pol_put(xp);
1408
1409 return 0;
1410}
1411
1412static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1413{
1414 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1415 int i;
1416
1417 if (xp->xfrm_nr == 0)
1418 return 0;
1419
1420 for (i = 0; i < xp->xfrm_nr; i++) {
1421 struct xfrm_user_tmpl *up = &vec[i];
1422 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1423
1424 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1425 up->family = kp->encap_family;
1da177e4
LT		 1426 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1427 up->reqid = kp->reqid;
1428 up->mode = kp->mode;
1429 up->share = kp->share;
1430 up->optional = kp->optional;
1431 up->aalgos = kp->aalgos;
1432 up->ealgos = kp->ealgos;
1433 up->calgos = kp->calgos;
1434 }
df71837d 1435
c0144bea
TG		 1436 return nla_put(skb, XFRMA_TMPL,
1437 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1438}
1439
1440static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1441{
1442 if (x->security) {
1443 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1444 }
1445 return 0;
0d681623 1446}
df71837d 1447
0d681623
SH		 1448static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1449{
1d1e34dd 1450 if (xp->security)
0d681623 1451 return copy_sec_ctx(xp->security, skb);
0d681623 1452 return 0;
df71837d 1453}
cfbfd45a
TG		 1454static inline size_t userpolicy_type_attrsize(void)
1455{
1456#ifdef CONFIG_XFRM_SUB_POLICY
1457 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1458#else
1459 return 0;
1460#endif
1461}
df71837d 1462
f7b6983f 1463#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1464static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1465{
c0144bea
TG		 1466 struct xfrm_userpolicy_type upt = {
1467 .type = type,
1468 };
f7b6983f 1469
c0144bea 1470 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1471}
1472
1473#else
b798a9ed 1474static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1475{
1476 return 0;
1477}
1478#endif
1479
1da177e4
LT		 1480static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1481{
1482 struct xfrm_dump_info *sp = ptr;
1483 struct xfrm_userpolicy_info *p;
1484 struct sk_buff *in_skb = sp->in_skb;
1485 struct sk_buff *skb = sp->out_skb;
1486 struct nlmsghdr *nlh;
1d1e34dd 1487 int err;
1da177e4 1488
15e47304 1489 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1490 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1491 if (nlh == NULL)
1492 return -EMSGSIZE;
1da177e4 1493
7b67c857 1494 p = nlmsg_data(nlh);
1da177e4 1495 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1496 err = copy_to_user_tmpl(xp, skb);
1497 if (!err)
1498 err = copy_to_user_sec_ctx(xp, skb);
1499 if (!err)
1500 err = copy_to_user_policy_type(xp->type, skb);
1501 if (!err)
1502 err = xfrm_mark_put(skb, &xp->mark);
1503 if (err) {
1504 nlmsg_cancel(skb, nlh);
1505 return err;
1506 }
9825069d 1507 nlmsg_end(skb, nlh);
1da177e4 1508 return 0;
1da177e4
LT		 1509}
1510
4c563f76
TT		 1511static int xfrm_dump_policy_done(struct netlink_callback *cb)
1512{
1513 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1514
1515 xfrm_policy_walk_done(walk);
1516 return 0;
1517}
1518
1da177e4
LT		 1519static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1520{
fc34acd3 1521 struct net *net = sock_net(skb->sk);
4c563f76 1522 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1523 struct xfrm_dump_info info;
1524
4c563f76
TT		 1525 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1526 sizeof(cb->args) - sizeof(cb->args[0]));
1527
1da177e4
LT		 1528 info.in_skb = cb->skb;
1529 info.out_skb = skb;
1530 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1531 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1532
1533 if (!cb->args[0]) {
1534 cb->args[0] = 1;
1535 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1536 }
1537
fc34acd3 1538 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1539
1540 return skb->len;
1541}
1542
1543static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1544 struct xfrm_policy *xp,
1545 int dir, u32 seq)
1546{
1547 struct xfrm_dump_info info;
1548 struct sk_buff *skb;
1549
7deb2264 1550 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1551 if (!skb)
1552 return ERR_PTR(-ENOMEM);
1553
1da177e4
LT		 1554 info.in_skb = in_skb;
1555 info.out_skb = skb;
1556 info.nlmsg_seq = seq;
1557 info.nlmsg_flags = 0;
1da177e4
LT		 1558
1559 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1560 kfree_skb(skb);
1561 return NULL;
1562 }
1563
1564 return skb;
1565}
1566
22e70050 1567static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1568 struct nlattr **attrs)
1da177e4 1569{
fc34acd3 1570 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1571 struct xfrm_policy *xp;
1572 struct xfrm_userpolicy_id *p;
b798a9ed 1573 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1574 int err;
26b15dad 1575 struct km_event c;
1da177e4 1576 int delete;
295fae56
JHS		 1577 struct xfrm_mark m;
1578 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1579
7b67c857 1580 p = nlmsg_data(nlh);
1da177e4
LT		 1581 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1582
35a7aa08 1583 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1584 if (err)
1585 return err;
1586
1da177e4
LT		 1587 err = verify_policy_dir(p->dir);
1588 if (err)
1589 return err;
1590
1591 if (p->index)
295fae56 1592 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1593 else {
5424f32e 1594 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1595 struct xfrm_sec_ctx *ctx;
df71837d 1596
35a7aa08 1597 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1598 if (err)
1599 return err;
1600
2c8dd116 1601 ctx = NULL;
df71837d 1602 if (rt) {
5424f32e 1603 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1604
03e1ad7b
PM		 1605 err = security_xfrm_policy_alloc(&ctx, uctx);
1606 if (err)
df71837d 1607 return err;
2c8dd116 1608 }
295fae56 1609 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1610 ctx, delete, &err);
03e1ad7b 1611 security_xfrm_policy_free(ctx);
df71837d 1612 }
1da177e4
LT		 1613 if (xp == NULL)
1614 return -ENOENT;
1615
1616 if (!delete) {
1617 struct sk_buff *resp_skb;
1618
1619 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1620 if (IS_ERR(resp_skb)) {
1621 err = PTR_ERR(resp_skb);
1622 } else {
a6483b79 1623 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1624 NETLINK_CB(skb).portid);
1da177e4 1625 }
26b15dad 1626 } else {
c53fa1ed
PM		 1627 uid_t loginuid = audit_get_loginuid(current);
1628 u32 sessionid = audit_get_sessionid(current);
1629 u32 sid;
2532386f 1630
c53fa1ed 1631 security_task_getsecid(current, &sid);
2532386f
EP		 1632 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1633 sid);
13fcfbb0
DM		 1634
1635 if (err != 0)
c8c05a8e 1636 goto out;
13fcfbb0 1637
e7443892 1638 c.data.byid = p->index;
f60f6b8f 1639 c.event = nlh->nlmsg_type;
26b15dad 1640 c.seq = nlh->nlmsg_seq;
15e47304 1641 c.portid = nlh->nlmsg_pid;
26b15dad 1642 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1643 }
1644
c8c05a8e 1645out:
ef41aaa0 1646 xfrm_pol_put(xp);
1da177e4
LT		 1647 return err;
1648}
1649
22e70050 1650static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1651 struct nlattr **attrs)
1da177e4 1652{
fc34acd3 1653 struct net *net = sock_net(skb->sk);
26b15dad 1654 struct km_event c;
7b67c857 1655 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1656 struct xfrm_audit audit_info;
4aa2e62c 1657 int err;
1da177e4 1658
c53fa1ed
PM		 1659 audit_info.loginuid = audit_get_loginuid(current);
1660 audit_info.sessionid = audit_get_sessionid(current);
1661 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1662 err = xfrm_state_flush(net, p->proto, &audit_info);
9e64cc95
JHS		 1663 if (err) {
1664 if (err == -ESRCH) /* empty table */
1665 return 0;
069c474e 1666 return err;
9e64cc95 1667 }
bf08867f 1668 c.data.proto = p->proto;
f60f6b8f 1669 c.event = nlh->nlmsg_type;
26b15dad 1670 c.seq = nlh->nlmsg_seq;
15e47304 1671 c.portid = nlh->nlmsg_pid;
7067802e 1672 c.net = net;
26b15dad
JHS		 1673 km_state_notify(NULL, &c);
1674
1da177e4
LT		 1675 return 0;
1676}
1677
d8647b79 1678static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1679{
d8647b79
SK		 1680 size_t replay_size = x->replay_esn ?
1681 xfrm_replay_state_esn_len(x->replay_esn) :
1682 sizeof(struct xfrm_replay_state);
1683
7deb2264 1684 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1685 + nla_total_size(replay_size)
7deb2264 1686 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1687 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1688 + nla_total_size(4) /* XFRM_AE_RTHR */
1689 + nla_total_size(4); /* XFRM_AE_ETHR */
1690}
d51d081d 1691
214e005b 1692static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1693{
1694 struct xfrm_aevent_id *id;
1695 struct nlmsghdr *nlh;
1d1e34dd 1696 int err;
d51d081d 1697
15e47304 1698 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1699 if (nlh == NULL)
1700 return -EMSGSIZE;
d51d081d 1701
7b67c857 1702 id = nlmsg_data(nlh);
2b5f6dcc 1703 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1704 id->sa_id.spi = x->id.spi;
1705 id->sa_id.family = x->props.family;
1706 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1707 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1708 id->reqid = x->props.reqid;
d51d081d
JHS		 1709 id->flags = c->data.aevent;
1710
d0fde795 1711 if (x->replay_esn) {
1d1e34dd
DM		 1712 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1713 xfrm_replay_state_esn_len(x->replay_esn),
1714 x->replay_esn);
d0fde795 1715 } else {
1d1e34dd
DM		 1716 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1717 &x->replay);
d0fde795 1718 }
1d1e34dd
DM		 1719 if (err)
1720 goto out_cancel;
1721 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1722 if (err)
1723 goto out_cancel;
d51d081d 1724
1d1e34dd
DM		 1725 if (id->flags & XFRM_AE_RTHR) {
1726 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1727 if (err)
1728 goto out_cancel;
1729 }
1730 if (id->flags & XFRM_AE_ETHR) {
1731 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1732 x->replay_maxage * 10 / HZ);
1733 if (err)
1734 goto out_cancel;
1735 }
1736 err = xfrm_mark_put(skb, &x->mark);
1737 if (err)
1738 goto out_cancel;
6f26b61e 1739
9825069d 1740 return nlmsg_end(skb, nlh);
d51d081d 1741
1d1e34dd 1742out_cancel:
9825069d 1743 nlmsg_cancel(skb, nlh);
1d1e34dd 1744 return err;
d51d081d
JHS		 1745}
1746
22e70050 1747static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1748 struct nlattr **attrs)
d51d081d 1749{
fc34acd3 1750 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1751 struct xfrm_state *x;
1752 struct sk_buff *r_skb;
1753 int err;
1754 struct km_event c;
6f26b61e
JHS		 1755 u32 mark;
1756 struct xfrm_mark m;
7b67c857 1757 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1758 struct xfrm_usersa_id *id = &p->sa_id;
1759
6f26b61e
JHS		 1760 mark = xfrm_mark_get(attrs, &m);
1761
1762 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1763 if (x == NULL)
d51d081d 1764 return -ESRCH;
d8647b79
SK		 1765
1766 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1767 if (r_skb == NULL) {
1768 xfrm_state_put(x);
1769 return -ENOMEM;
d51d081d
JHS		 1770 }
1771
1772 /*
1773 * XXX: is this lock really needed - none of the other
1774 * gets lock (the concern is things getting updated
1775 * while we are still reading) - jhs
1776 */
1777 spin_lock_bh(&x->lock);
1778 c.data.aevent = p->flags;
1779 c.seq = nlh->nlmsg_seq;
15e47304 1780 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1781
1782 if (build_aevent(r_skb, x, &c) < 0)
1783 BUG();
15e47304 1784 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1785 spin_unlock_bh(&x->lock);
1786 xfrm_state_put(x);
1787 return err;
1788}
1789
22e70050 1790static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1791 struct nlattr **attrs)
d51d081d 1792{
fc34acd3 1793 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1794 struct xfrm_state *x;
1795 struct km_event c;
1796 int err = - EINVAL;
6f26b61e
JHS		 1797 u32 mark = 0;
1798 struct xfrm_mark m;
7b67c857 1799 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 1800 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 1801 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 1802 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d 1803
d8647b79 1804 if (!lt && !rp && !re)
d51d081d
JHS		 1805 return err;
1806
1807 /* pedantic mode - thou shalt sayeth replaceth */
1808 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1809 return err;
1810
6f26b61e
JHS		 1811 mark = xfrm_mark_get(attrs, &m);
1812
1813 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1814 if (x == NULL)
1815 return -ESRCH;
1816
1817 if (x->km.state != XFRM_STATE_VALID)
1818 goto out;
1819
e2b19125
SK		 1820 err = xfrm_replay_verify_len(x->replay_esn, rp);
1821 if (err)
1822 goto out;
1823
d51d081d 1824 spin_lock_bh(&x->lock);
35a7aa08 1825 xfrm_update_ae_params(x, attrs);
d51d081d 1826 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1827
1828 c.event = nlh->nlmsg_type;
1829 c.seq = nlh->nlmsg_seq;
15e47304 1830 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 1831 c.data.aevent = XFRM_AE_CU;
1832 km_state_notify(x, &c);
1833 err = 0;
1834out:
1835 xfrm_state_put(x);
1836 return err;
1837}
1838
22e70050 1839static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1840 struct nlattr **attrs)
1da177e4 1841{
fc34acd3 1842 struct net *net = sock_net(skb->sk);
f7b6983f 1843 struct km_event c;
b798a9ed 1844 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1845 int err;
161a09e7 1846 struct xfrm_audit audit_info;
f7b6983f 1847
35a7aa08 1848 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1849 if (err)
1850 return err;
26b15dad 1851
c53fa1ed
PM		 1852 audit_info.loginuid = audit_get_loginuid(current);
1853 audit_info.sessionid = audit_get_sessionid(current);
1854 security_task_getsecid(current, &audit_info.secid);
fc34acd3 1855 err = xfrm_policy_flush(net, type, &audit_info);
2f1eb65f
JHS		 1856 if (err) {
1857 if (err == -ESRCH) /* empty table */
1858 return 0;
069c474e 1859 return err;
2f1eb65f
JHS		 1860 }
1861
f7b6983f 1862 c.data.type = type;
f60f6b8f 1863 c.event = nlh->nlmsg_type;
26b15dad 1864 c.seq = nlh->nlmsg_seq;
15e47304 1865 c.portid = nlh->nlmsg_pid;
7067802e 1866 c.net = net;
26b15dad 1867 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1868 return 0;
1869}
1870
22e70050 1871static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1872 struct nlattr **attrs)
6c5c8ca7 1873{
fc34acd3 1874 struct net *net = sock_net(skb->sk);
6c5c8ca7 1875 struct xfrm_policy *xp;
7b67c857 1876 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1877 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1878 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 1879 int err = -ENOENT;
295fae56
JHS		 1880 struct xfrm_mark m;
1881 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 1882
35a7aa08 1883 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1884 if (err)
1885 return err;
1886
c8bf4d04
TT		 1887 err = verify_policy_dir(p->dir);
1888 if (err)
1889 return err;
1890
6c5c8ca7 1891 if (p->index)
295fae56 1892 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 1893 else {
5424f32e 1894 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1895 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1896
35a7aa08 1897 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1898 if (err)
1899 return err;
1900
2c8dd116 1901 ctx = NULL;
6c5c8ca7 1902 if (rt) {
5424f32e 1903 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1904
03e1ad7b
PM		 1905 err = security_xfrm_policy_alloc(&ctx, uctx);
1906 if (err)
6c5c8ca7 1907 return err;
2c8dd116 1908 }
295fae56 1909 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 1910 &p->sel, ctx, 0, &err);
03e1ad7b 1911 security_xfrm_policy_free(ctx);
6c5c8ca7 1912 }
6c5c8ca7 1913 if (xp == NULL)
ef41aaa0 1914 return -ENOENT;
03e1ad7b 1915
ea2dea9d 1916 if (unlikely(xp->walk.dead))
6c5c8ca7 1917 goto out;
6c5c8ca7 1918
6c5c8ca7
JHS		 1919 err = 0;
1920 if (up->hard) {
c53fa1ed
PM		 1921 uid_t loginuid = audit_get_loginuid(current);
1922 u32 sessionid = audit_get_sessionid(current);
1923 u32 sid;
1924
1925 security_task_getsecid(current, &sid);
6c5c8ca7 1926 xfrm_policy_delete(xp, p->dir);
2532386f 1927 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
161a09e7 1928
6c5c8ca7
JHS		 1929 } else {
1930 // reset the timers here?
62db5cfd 1931 WARN(1, "Dont know what to do with soft policy expire\n");
6c5c8ca7
JHS		 1932 }
1933 km_policy_expired(xp, p->dir, up->hard, current->pid);
1934
1935out:
1936 xfrm_pol_put(xp);
1937 return err;
1938}
1939
22e70050 1940static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1941 struct nlattr **attrs)
53bc6b4d 1942{
fc34acd3 1943 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 1944 struct xfrm_state *x;
1945 int err;
7b67c857 1946 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 1947 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 1948 struct xfrm_mark m;
928497f0 1949 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 1950
6f26b61e 1951 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1952
3a765aa5 1953 err = -ENOENT;
53bc6b4d
JHS		 1954 if (x == NULL)
1955 return err;
1956
53bc6b4d 1957 spin_lock_bh(&x->lock);
3a765aa5 1958 err = -EINVAL;
53bc6b4d
JHS		 1959 if (x->km.state != XFRM_STATE_VALID)
1960 goto out;
1961 km_state_expired(x, ue->hard, current->pid);
1962
161a09e7 1963 if (ue->hard) {
c53fa1ed
PM		 1964 uid_t loginuid = audit_get_loginuid(current);
1965 u32 sessionid = audit_get_sessionid(current);
1966 u32 sid;
1967
1968 security_task_getsecid(current, &sid);
53bc6b4d 1969 __xfrm_state_delete(x);
2532386f 1970 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
161a09e7 1971 }
3a765aa5 1972 err = 0;
53bc6b4d
JHS		 1973out:
1974 spin_unlock_bh(&x->lock);
1975 xfrm_state_put(x);
1976 return err;
1977}
1978
22e70050 1979static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1980 struct nlattr **attrs)
980ebd25 1981{
fc34acd3 1982 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 1983 struct xfrm_policy *xp;
1984 struct xfrm_user_tmpl *ut;
1985 int i;
5424f32e 1986 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 1987 struct xfrm_mark mark;
980ebd25 1988
7b67c857 1989 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 1990 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 1991 int err = -ENOMEM;
1992
1993 if (!x)
d8eb9307 1994 goto nomem;
980ebd25 1995
6f26b61e
JHS		 1996 xfrm_mark_get(attrs, &mark);
1997
980ebd25 1998 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 1999 if (err)
2000 goto bad_policy;
980ebd25
JHS		 2001
2002 /* build an XP */
fc34acd3 2003 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2004 if (!xp)
2005 goto free_state;
980ebd25
JHS		 2006
2007 memcpy(&x->id, &ua->id, sizeof(ua->id));
2008 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2009 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2010 xp->mark.m = x->mark.m = mark.m;
2011 xp->mark.v = x->mark.v = mark.v;
5424f32e 2012 ut = nla_data(rt);
980ebd25
JHS		 2013 /* extract the templates and for each call km_key */
2014 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2015 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2016 memcpy(&x->id, &t->id, sizeof(x->id));
2017 x->props.mode = t->mode;
2018 x->props.reqid = t->reqid;
2019 x->props.family = ut->family;
2020 t->aalgos = ua->aalgos;
2021 t->ealgos = ua->ealgos;
2022 t->calgos = ua->calgos;
2023 err = km_query(x, t, xp);
2024
2025 }
2026
2027 kfree(x);
2028 kfree(xp);
2029
2030 return 0;
d8eb9307
IJ		 2031
2032bad_policy:
62db5cfd 2033 WARN(1, "BAD policy passed\n");
d8eb9307
IJ		 2034free_state:
2035 kfree(x);
2036nomem:
2037 return err;
980ebd25
JHS		 2038}
2039
5c79de6e 2040#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2041static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2042 struct xfrm_kmaddress *k,
5424f32e 2043 struct nlattr **attrs, int *num)
5c79de6e 2044{
5424f32e 2045 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2046 struct xfrm_user_migrate *um;
2047 int i, num_migrate;
2048
13c1d189
AE		 2049 if (k != NULL) {
2050 struct xfrm_user_kmaddress *uk;
2051
2052 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2053 memcpy(&k->local, &uk->local, sizeof(k->local));
2054 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2055 k->family = uk->family;
2056 k->reserved = uk->reserved;
2057 }
2058
5424f32e
TG		 2059 um = nla_data(rt);
2060 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2061
2062 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2063 return -EINVAL;
2064
2065 for (i = 0; i < num_migrate; i++, um++, ma++) {
2066 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2067 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2068 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2069 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2070
2071 ma->proto = um->proto;
2072 ma->mode = um->mode;
2073 ma->reqid = um->reqid;
2074
2075 ma->old_family = um->old_family;
2076 ma->new_family = um->new_family;
2077 }
2078
2079 *num = i;
2080 return 0;
2081}
2082
2083static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2084 struct nlattr **attrs)
5c79de6e 2085{
7b67c857 2086 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2087 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2088 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2089 u8 type;
2090 int err;
2091 int n = 0;
2092
35a7aa08 2093 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2094 return -EINVAL;
5c79de6e 2095
13c1d189
AE		 2096 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2097
5424f32e 2098 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2099 if (err)
2100 return err;
2101
13c1d189 2102 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2103 if (err)
2104 return err;
2105
2106 if (!n)
2107 return 0;
2108
13c1d189 2109 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
5c79de6e
SS		 2110
2111 return 0;
2112}
2113#else
2114static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2115 struct nlattr **attrs)
5c79de6e
SS		 2116{
2117 return -ENOPROTOOPT;
2118}
2119#endif
2120
2121#ifdef CONFIG_XFRM_MIGRATE
183cad12 2122static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2123{
2124 struct xfrm_user_migrate um;
2125
2126 memset(&um, 0, sizeof(um));
2127 um.proto = m->proto;
2128 um.mode = m->mode;
2129 um.reqid = m->reqid;
2130 um.old_family = m->old_family;
2131 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2132 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2133 um.new_family = m->new_family;
2134 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2135 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2136
c0144bea 2137 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2138}
2139
183cad12 2140static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2141{
2142 struct xfrm_user_kmaddress uk;
2143
2144 memset(&uk, 0, sizeof(uk));
2145 uk.family = k->family;
2146 uk.reserved = k->reserved;
2147 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2148 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2149
2150 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2151}
2152
2153static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 2154{
2155 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 2156 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2157 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2158 + userpolicy_type_attrsize();
7deb2264
TG		 2159}
2160
183cad12
DM		 2161static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2162 int num_migrate, const struct xfrm_kmaddress *k,
2163 const struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e 2164{
183cad12 2165 const struct xfrm_migrate *mp;
5c79de6e
SS		 2166 struct xfrm_userpolicy_id *pol_id;
2167 struct nlmsghdr *nlh;
1d1e34dd 2168 int i, err;
5c79de6e 2169
79b8b7f4
TG		 2170 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2171 if (nlh == NULL)
2172 return -EMSGSIZE;
5c79de6e 2173
7b67c857 2174 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2175 /* copy data from selector, dir, and type to the pol_id */
2176 memset(pol_id, 0, sizeof(*pol_id));
2177 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2178 pol_id->dir = dir;
2179
1d1e34dd
DM		 2180 if (k != NULL) {
2181 err = copy_to_user_kmaddress(k, skb);
2182 if (err)
2183 goto out_cancel;
2184 }
2185 err = copy_to_user_policy_type(type, skb);
2186 if (err)
2187 goto out_cancel;
5c79de6e 2188 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2189 err = copy_to_user_migrate(mp, skb);
2190 if (err)
2191 goto out_cancel;
5c79de6e
SS		 2192 }
2193
9825069d 2194 return nlmsg_end(skb, nlh);
1d1e34dd
DM		 2195
2196out_cancel:
9825069d 2197 nlmsg_cancel(skb, nlh);
1d1e34dd 2198 return err;
5c79de6e
SS		 2199}
2200
183cad12
DM		 2201static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2202 const struct xfrm_migrate *m, int num_migrate,
2203 const struct xfrm_kmaddress *k)
5c79de6e 2204{
a6483b79 2205 struct net *net = &init_net;
5c79de6e 2206 struct sk_buff *skb;
5c79de6e 2207
13c1d189 2208 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 2209 if (skb == NULL)
2210 return -ENOMEM;
2211
2212 /* build migrate */
13c1d189 2213 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 2214 BUG();
2215
a6483b79 2216 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 2217}
2218#else
183cad12
DM		 2219static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2220 const struct xfrm_migrate *m, int num_migrate,
2221 const struct xfrm_kmaddress *k)
5c79de6e
SS		 2222{
2223 return -ENOPROTOOPT;
2224}
2225#endif
d51d081d 2226
a7bd9a45 2227#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2228
2229static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2230 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2231 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2232 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2233 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2234 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2235 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2236 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2237 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2238 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2239 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2240 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2241 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2242 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2243 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2244 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2245 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2246 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2247 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 2248 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2249 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2250};
2251
492b558b
TG		 2252#undef XMSGSIZE
2253
cf5cb79f 2254static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2255 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2256 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2257 [XFRMA_LASTUSED] = { .type = NLA_U64},
2258 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2259 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2260 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2261 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2262 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2263 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2264 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2265 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2266 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2267 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2268 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2269 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2270 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2271 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2272 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2273 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2274 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2275 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2276 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2277 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
cf5cb79f
TG		 2278};
2279
1da177e4 2280static struct xfrm_link {
5424f32e 2281 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 2282 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2283 int (*done)(struct netlink_callback *);
492b558b
TG		 2284} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2285 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2286 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2287 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2288 .dump = xfrm_dump_sa,
2289 .done = xfrm_dump_sa_done },
492b558b
TG		 2290 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2291 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2292 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 2293 .dump = xfrm_dump_policy,
2294 .done = xfrm_dump_policy_done },
492b558b 2295 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2296 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2297 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2298 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2299 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2300 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2301 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2302 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2303 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2304 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2305 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2306 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 2307 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2308};
2309
1d00a4eb 2310static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2311{
a6483b79 2312 struct net *net = sock_net(skb->sk);
35a7aa08 2313 struct nlattr *attrs[XFRMA_MAX+1];
1da177e4 2314 struct xfrm_link *link;
a7bd9a45 2315 int type, err;
1da177e4 2316
1da177e4 2317 type = nlh->nlmsg_type;
1da177e4 2318 if (type > XFRM_MSG_MAX)
1d00a4eb 2319 return -EINVAL;
1da177e4
LT		 2320
2321 type -= XFRM_MSG_BASE;
2322 link = &xfrm_dispatch[type];
2323
2324 /* All operations require privileges, even GET */
fd778461 2325 if (!capable(CAP_NET_ADMIN))
1d00a4eb 2326 return -EPERM;
1da177e4 2327
492b558b
TG		 2328 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2329 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2330 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2331 if (link->dump == NULL)
1d00a4eb 2332 return -EINVAL;
88fc2c84 2333
80d326fa
PNA		 2334 {
2335 struct netlink_dump_control c = {
2336 .dump = link->dump,
2337 .done = link->done,
2338 };
2339 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2340 }
1da177e4
LT		 2341 }
2342
35a7aa08 2343 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2344 xfrma_policy);
a7bd9a45
TG		 2345 if (err < 0)
2346 return err;
1da177e4
LT		 2347
2348 if (link->doit == NULL)
1d00a4eb 2349 return -EINVAL;
1da177e4 2350
5424f32e 2351 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2352}
2353
cd40b7d3 2354static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2355{
cd40b7d3
DL		 2356 mutex_lock(&xfrm_cfg_mutex);
2357 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2358 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 2359}
2360
7deb2264
TG		 2361static inline size_t xfrm_expire_msgsize(void)
2362{
6f26b61e
JHS		 2363 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2364 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2365}
2366
214e005b 2367static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2368{
2369 struct xfrm_user_expire *ue;
2370 struct nlmsghdr *nlh;
1d1e34dd 2371 int err;
1da177e4 2372
15e47304 2373 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2374 if (nlh == NULL)
2375 return -EMSGSIZE;
1da177e4 2376
7b67c857 2377 ue = nlmsg_data(nlh);
1da177e4 2378 copy_to_user_state(x, &ue->state);
d51d081d 2379 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2380
1d1e34dd
DM		 2381 err = xfrm_mark_put(skb, &x->mark);
2382 if (err)
2383 return err;
6f26b61e 2384
9825069d 2385 return nlmsg_end(skb, nlh);
1da177e4
LT		 2386}
2387
214e005b 2388static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2389{
fc34acd3 2390 struct net *net = xs_net(x);
1da177e4
LT		 2391 struct sk_buff *skb;
2392
7deb2264 2393 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2394 if (skb == NULL)
2395 return -ENOMEM;
2396
6f26b61e
JHS		 2397 if (build_expire(skb, x, c) < 0) {
2398 kfree_skb(skb);
2399 return -EMSGSIZE;
2400 }
1da177e4 2401
a6483b79 2402 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2403}
2404
214e005b 2405static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2406{
fc34acd3 2407 struct net *net = xs_net(x);
d51d081d 2408 struct sk_buff *skb;
d51d081d 2409
d8647b79 2410 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2411 if (skb == NULL)
2412 return -ENOMEM;
2413
2414 if (build_aevent(skb, x, c) < 0)
2415 BUG();
2416
a6483b79 2417 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2418}
2419
214e005b 2420static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2421{
7067802e 2422 struct net *net = c->net;
26b15dad
JHS		 2423 struct xfrm_usersa_flush *p;
2424 struct nlmsghdr *nlh;
2425 struct sk_buff *skb;
7deb2264 2426 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2427
7deb2264 2428 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2429 if (skb == NULL)
2430 return -ENOMEM;
26b15dad 2431
15e47304 2432 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2433 if (nlh == NULL) {
2434 kfree_skb(skb);
2435 return -EMSGSIZE;
2436 }
26b15dad 2437
7b67c857 2438 p = nlmsg_data(nlh);
bf08867f 2439 p->proto = c->data.proto;
26b15dad 2440
9825069d 2441 nlmsg_end(skb, nlh);
26b15dad 2442
a6483b79 2443 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2444}
2445
7deb2264 2446static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2447{
7deb2264 2448 size_t l = 0;
1a6509d9
HX		 2449 if (x->aead)
2450 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2451 if (x->aalg) {
2452 l += nla_total_size(sizeof(struct xfrm_algo) +
2453 (x->aalg->alg_key_len + 7) / 8);
2454 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2455 }
26b15dad 2456 if (x->ealg)
0f99be0d 2457 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2458 if (x->calg)
7deb2264 2459 l += nla_total_size(sizeof(*x->calg));
26b15dad 2460 if (x->encap)
7deb2264 2461 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2462 if (x->tfcpad)
2463 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2464 if (x->replay_esn)
2465 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
68325d3b
HX		 2466 if (x->security)
2467 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2468 x->security->ctx_len);
2469 if (x->coaddr)
2470 l += nla_total_size(sizeof(*x->coaddr));
2471
d26f3984
HX		 2472 /* Must count x->lastused as it may become non-zero behind our back. */
2473 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2474
2475 return l;
2476}
2477
214e005b 2478static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2479{
fc34acd3 2480 struct net *net = xs_net(x);
26b15dad 2481 struct xfrm_usersa_info *p;
0603eac0 2482 struct xfrm_usersa_id *id;
26b15dad
JHS		 2483 struct nlmsghdr *nlh;
2484 struct sk_buff *skb;
26b15dad 2485 int len = xfrm_sa_len(x);
1d1e34dd 2486 int headlen, err;
0603eac0
HX		 2487
2488 headlen = sizeof(*p);
2489 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2490 len += nla_total_size(headlen);
0603eac0 2491 headlen = sizeof(*id);
6f26b61e 2492 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2493 }
7deb2264 2494 len += NLMSG_ALIGN(headlen);
26b15dad 2495
7deb2264 2496 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2497 if (skb == NULL)
2498 return -ENOMEM;
26b15dad 2499
15e47304 2500 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2501 err = -EMSGSIZE;
79b8b7f4 2502 if (nlh == NULL)
1d1e34dd 2503 goto out_free_skb;
26b15dad 2504
7b67c857 2505 p = nlmsg_data(nlh);
0603eac0 2506 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2507 struct nlattr *attr;
2508
7b67c857 2509 id = nlmsg_data(nlh);
0603eac0
HX		 2510 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2511 id->spi = x->id.spi;
2512 id->family = x->props.family;
2513 id->proto = x->id.proto;
2514
c0144bea 2515 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2516 err = -EMSGSIZE;
c0144bea 2517 if (attr == NULL)
1d1e34dd 2518 goto out_free_skb;
c0144bea
TG		 2519
2520 p = nla_data(attr);
0603eac0 2521 }
1d1e34dd
DM		 2522 err = copy_to_user_state_extra(x, p, skb);
2523 if (err)
2524 goto out_free_skb;
26b15dad 2525
9825069d 2526 nlmsg_end(skb, nlh);
26b15dad 2527
a6483b79 2528 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2529
1d1e34dd 2530out_free_skb:
26b15dad 2531 kfree_skb(skb);
1d1e34dd 2532 return err;
26b15dad
JHS		 2533}
2534
214e005b 2535static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2536{
2537
2538 switch (c->event) {
f60f6b8f 2539 case XFRM_MSG_EXPIRE:
26b15dad 2540 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2541 case XFRM_MSG_NEWAE:
2542 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2543 case XFRM_MSG_DELSA:
2544 case XFRM_MSG_UPDSA:
2545 case XFRM_MSG_NEWSA:
26b15dad 2546 return xfrm_notify_sa(x, c);
f60f6b8f 2547 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2548 return xfrm_notify_sa_flush(c);
2549 default:
62db5cfd 2550 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2551 c->event);
2552 break;
26b15dad
JHS		 2553 }
2554
2555 return 0;
2556
2557}
2558
7deb2264
TG		 2559static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2560 struct xfrm_policy *xp)
2561{
2562 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2563 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2564 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2565 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2566 + userpolicy_type_attrsize();
2567}
2568
1da177e4 2569static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2570 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2571{
1d1e34dd 2572 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2573 struct xfrm_user_acquire *ua;
2574 struct nlmsghdr *nlh;
1d1e34dd 2575 int err;
1da177e4 2576
79b8b7f4
TG		 2577 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2578 if (nlh == NULL)
2579 return -EMSGSIZE;
1da177e4 2580
7b67c857 2581 ua = nlmsg_data(nlh);
1da177e4
LT		 2582 memcpy(&ua->id, &x->id, sizeof(ua->id));
2583 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2584 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2585 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2586 ua->aalgos = xt->aalgos;
2587 ua->ealgos = xt->ealgos;
2588 ua->calgos = xt->calgos;
2589 ua->seq = x->km.seq = seq;
2590
1d1e34dd
DM		 2591 err = copy_to_user_tmpl(xp, skb);
2592 if (!err)
2593 err = copy_to_user_state_sec_ctx(x, skb);
2594 if (!err)
2595 err = copy_to_user_policy_type(xp->type, skb);
2596 if (!err)
2597 err = xfrm_mark_put(skb, &xp->mark);
2598 if (err) {
2599 nlmsg_cancel(skb, nlh);
2600 return err;
2601 }
1da177e4 2602
9825069d 2603 return nlmsg_end(skb, nlh);
1da177e4
LT		 2604}
2605
2606static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2607 struct xfrm_policy *xp)
1da177e4 2608{
a6483b79 2609 struct net *net = xs_net(x);
1da177e4 2610 struct sk_buff *skb;
1da177e4 2611
7deb2264 2612 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2613 if (skb == NULL)
2614 return -ENOMEM;
2615
65e0736b 2616 if (build_acquire(skb, x, xt, xp) < 0)
1da177e4
LT		 2617 BUG();
2618
a6483b79 2619 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2620}
2621
2622/* User gives us xfrm_user_policy_info followed by an array of 0
2623 * or more templates.
2624 */
cb969f07 2625static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2626 u8 *data, int len, int *dir)
2627{
fc34acd3 2628 struct net *net = sock_net(sk);
1da177e4
LT		 2629 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2630 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2631 struct xfrm_policy *xp;
2632 int nr;
2633
cb969f07 2634 switch (sk->sk_family) {
1da177e4
LT		 2635 case AF_INET:
2636 if (opt != IP_XFRM_POLICY) {
2637 *dir = -EOPNOTSUPP;
2638 return NULL;
2639 }
2640 break;
dfd56b8b 2641#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2642 case AF_INET6:
2643 if (opt != IPV6_XFRM_POLICY) {
2644 *dir = -EOPNOTSUPP;
2645 return NULL;
2646 }
2647 break;
2648#endif
2649 default:
2650 *dir = -EINVAL;
2651 return NULL;
2652 }
2653
2654 *dir = -EINVAL;
2655
2656 if (len < sizeof(*p) ||
2657 verify_newpolicy_info(p))
2658 return NULL;
2659
2660 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2661 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2662 return NULL;
2663
a4f1bac6
HX		 2664 if (p->dir > XFRM_POLICY_OUT)
2665 return NULL;
2666
2f09a4d5 2667 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2668 if (xp == NULL) {
2669 *dir = -ENOBUFS;
2670 return NULL;
2671 }
2672
2673 copy_from_user_policy(xp, p);
f7b6983f 2674 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2675 copy_templates(xp, ut, nr);
2676
2677 *dir = p->dir;
2678
2679 return xp;
2680}
2681
7deb2264
TG		 2682static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2683{
2684 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2685 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2686 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2687 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2688 + userpolicy_type_attrsize();
2689}
2690
1da177e4 2691static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2692 int dir, const struct km_event *c)
1da177e4
LT		 2693{
2694 struct xfrm_user_polexpire *upe;
d51d081d 2695 int hard = c->data.hard;
1d1e34dd
DM		 2696 struct nlmsghdr *nlh;
2697 int err;
1da177e4 2698
15e47304 2699 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2700 if (nlh == NULL)
2701 return -EMSGSIZE;
1da177e4 2702
7b67c857 2703 upe = nlmsg_data(nlh);
1da177e4 2704 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2705 err = copy_to_user_tmpl(xp, skb);
2706 if (!err)
2707 err = copy_to_user_sec_ctx(xp, skb);
2708 if (!err)
2709 err = copy_to_user_policy_type(xp->type, skb);
2710 if (!err)
2711 err = xfrm_mark_put(skb, &xp->mark);
2712 if (err) {
2713 nlmsg_cancel(skb, nlh);
2714 return err;
2715 }
1da177e4
LT		 2716 upe->hard = !!hard;
2717
9825069d 2718 return nlmsg_end(skb, nlh);
1da177e4
LT		 2719}
2720
214e005b 2721static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2722{
fc34acd3 2723 struct net *net = xp_net(xp);
1da177e4 2724 struct sk_buff *skb;
1da177e4 2725
7deb2264 2726 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2727 if (skb == NULL)
2728 return -ENOMEM;
2729
d51d081d 2730 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2731 BUG();
2732
a6483b79 2733 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2734}
2735
214e005b 2736static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2737{
1d1e34dd 2738 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 2739 struct net *net = xp_net(xp);
26b15dad 2740 struct xfrm_userpolicy_info *p;
0603eac0 2741 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2742 struct nlmsghdr *nlh;
2743 struct sk_buff *skb;
1d1e34dd 2744 int headlen, err;
0603eac0
HX		 2745
2746 headlen = sizeof(*p);
2747 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2748 len += nla_total_size(headlen);
0603eac0
HX		 2749 headlen = sizeof(*id);
2750 }
cfbfd45a 2751 len += userpolicy_type_attrsize();
295fae56 2752 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 2753 len += NLMSG_ALIGN(headlen);
26b15dad 2754
7deb2264 2755 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2756 if (skb == NULL)
2757 return -ENOMEM;
26b15dad 2758
15e47304 2759 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2760 err = -EMSGSIZE;
79b8b7f4 2761 if (nlh == NULL)
1d1e34dd 2762 goto out_free_skb;
26b15dad 2763
7b67c857 2764 p = nlmsg_data(nlh);
0603eac0 2765 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2766 struct nlattr *attr;
2767
7b67c857 2768 id = nlmsg_data(nlh);
0603eac0
HX		 2769 memset(id, 0, sizeof(*id));
2770 id->dir = dir;
2771 if (c->data.byid)
2772 id->index = xp->index;
2773 else
2774 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2775
c0144bea 2776 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 2777 err = -EMSGSIZE;
c0144bea 2778 if (attr == NULL)
1d1e34dd 2779 goto out_free_skb;
c0144bea
TG		 2780
2781 p = nla_data(attr);
0603eac0 2782 }
26b15dad 2783
26b15dad 2784 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 2785 err = copy_to_user_tmpl(xp, skb);
2786 if (!err)
2787 err = copy_to_user_policy_type(xp->type, skb);
2788 if (!err)
2789 err = xfrm_mark_put(skb, &xp->mark);
2790 if (err)
2791 goto out_free_skb;
295fae56 2792
9825069d 2793 nlmsg_end(skb, nlh);
26b15dad 2794
a6483b79 2795 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2796
1d1e34dd 2797out_free_skb:
26b15dad 2798 kfree_skb(skb);
1d1e34dd 2799 return err;
26b15dad
JHS		 2800}
2801
214e005b 2802static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 2803{
7067802e 2804 struct net *net = c->net;
26b15dad
JHS		 2805 struct nlmsghdr *nlh;
2806 struct sk_buff *skb;
1d1e34dd 2807 int err;
26b15dad 2808
7deb2264 2809 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2810 if (skb == NULL)
2811 return -ENOMEM;
26b15dad 2812
15e47304 2813 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 2814 err = -EMSGSIZE;
79b8b7f4 2815 if (nlh == NULL)
1d1e34dd
DM		 2816 goto out_free_skb;
2817 err = copy_to_user_policy_type(c->data.type, skb);
2818 if (err)
2819 goto out_free_skb;
26b15dad 2820
9825069d 2821 nlmsg_end(skb, nlh);
26b15dad 2822
a6483b79 2823 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad 2824
1d1e34dd 2825out_free_skb:
26b15dad 2826 kfree_skb(skb);
1d1e34dd 2827 return err;
26b15dad
JHS		 2828}
2829
214e005b 2830static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 2831{
2832
2833 switch (c->event) {
f60f6b8f
HX		 2834 case XFRM_MSG_NEWPOLICY:
2835 case XFRM_MSG_UPDPOLICY:
2836 case XFRM_MSG_DELPOLICY:
26b15dad 2837 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2838 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2839 return xfrm_notify_policy_flush(c);
f60f6b8f 2840 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2841 return xfrm_exp_policy_notify(xp, dir, c);
2842 default:
62db5cfd 2843 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2844 c->event);
26b15dad
JHS		 2845 }
2846
2847 return 0;
2848
2849}
2850
7deb2264
TG		 2851static inline size_t xfrm_report_msgsize(void)
2852{
2853 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2854}
2855
97a64b45
MN		 2856static int build_report(struct sk_buff *skb, u8 proto,
2857 struct xfrm_selector *sel, xfrm_address_t *addr)
2858{
2859 struct xfrm_user_report *ur;
2860 struct nlmsghdr *nlh;
97a64b45 2861
79b8b7f4
TG		 2862 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2863 if (nlh == NULL)
2864 return -EMSGSIZE;
97a64b45 2865
7b67c857 2866 ur = nlmsg_data(nlh);
97a64b45
MN		 2867 ur->proto = proto;
2868 memcpy(&ur->sel, sel, sizeof(ur->sel));
2869
1d1e34dd
DM		 2870 if (addr) {
2871 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2872 if (err) {
2873 nlmsg_cancel(skb, nlh);
2874 return err;
2875 }
2876 }
9825069d 2877 return nlmsg_end(skb, nlh);
97a64b45
MN		 2878}
2879
db983c11
AD		 2880static int xfrm_send_report(struct net *net, u8 proto,
2881 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2882{
2883 struct sk_buff *skb;
97a64b45 2884
7deb2264 2885 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2886 if (skb == NULL)
2887 return -ENOMEM;
2888
2889 if (build_report(skb, proto, sel, addr) < 0)
2890 BUG();
2891
a6483b79 2892 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2893}
2894
3a2dfbe8
MW		 2895static inline size_t xfrm_mapping_msgsize(void)
2896{
2897 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2898}
2899
2900static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2901 xfrm_address_t *new_saddr, __be16 new_sport)
2902{
2903 struct xfrm_user_mapping *um;
2904 struct nlmsghdr *nlh;
2905
2906 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2907 if (nlh == NULL)
2908 return -EMSGSIZE;
2909
2910 um = nlmsg_data(nlh);
2911
2912 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2913 um->id.spi = x->id.spi;
2914 um->id.family = x->props.family;
2915 um->id.proto = x->id.proto;
2916 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2917 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2918 um->new_sport = new_sport;
2919 um->old_sport = x->encap->encap_sport;
2920 um->reqid = x->props.reqid;
2921
2922 return nlmsg_end(skb, nlh);
2923}
2924
2925static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2926 __be16 sport)
2927{
a6483b79 2928 struct net *net = xs_net(x);
3a2dfbe8
MW		 2929 struct sk_buff *skb;
2930
2931 if (x->id.proto != IPPROTO_ESP)
2932 return -EINVAL;
2933
2934 if (!x->encap)
2935 return -EINVAL;
2936
2937 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2938 if (skb == NULL)
2939 return -ENOMEM;
2940
2941 if (build_mapping(skb, x, ipaddr, sport) < 0)
2942 BUG();
2943
a6483b79 2944 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2945}
2946
1da177e4
LT		 2947static struct xfrm_mgr netlink_mgr = {
2948 .id = "netlink",
2949 .notify = xfrm_send_state_notify,
2950 .acquire = xfrm_send_acquire,
2951 .compile_policy = xfrm_compile_policy,
2952 .notify_policy = xfrm_send_policy_notify,
97a64b45 2953 .report = xfrm_send_report,
5c79de6e 2954 .migrate = xfrm_send_migrate,
3a2dfbe8 2955 .new_mapping = xfrm_send_mapping,
1da177e4
LT		 2956};
2957
a6483b79 2958static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 2959{
be33690d 2960 struct sock *nlsk;
a31f2d17
PNA		 2961 struct netlink_kernel_cfg cfg = {
2962 .groups = XFRMNLGRP_MAX,
2963 .input = xfrm_netlink_rcv,
2964 };
be33690d 2965
9f00d977 2966 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 2967 if (nlsk == NULL)
1da177e4 2968 return -ENOMEM;
d79d792e 2969 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 2970 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 2971 return 0;
2972}
2973
d79d792e 2974static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 2975{
d79d792e
EB		 2976 struct net *net;
2977 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 2978 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 2979 synchronize_net();
2980 list_for_each_entry(net, net_exit_list, exit_list)
2981 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 2982}
2983
a6483b79 2984static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 2985 .init = xfrm_user_net_init,
2986 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 2987};
2988
2989static int __init xfrm_user_init(void)
2990{
2991 int rv;
2992
2993 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2994
2995 rv = register_pernet_subsys(&xfrm_user_net_ops);
2996 if (rv < 0)
2997 return rv;
2998 rv = xfrm_register_km(&netlink_mgr);
2999 if (rv < 0)
3000 unregister_pernet_subsys(&xfrm_user_net_ops);
3001 return rv;
3002}
3003
3004static void __exit xfrm_user_exit(void)
3005{
3006 xfrm_unregister_km(&netlink_mgr);
3007 unregister_pernet_subsys(&xfrm_user_net_ops);
3008}
3009
1da177e4
LT		 3010module_init(xfrm_user_init);
3011module_exit(xfrm_user_exit);
3012MODULE_LICENSE("GPL");
4fdb3bb7 3013MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3014
kernel source for telekom puls (alcatel/mediatek)