]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - net/xfrm/xfrm_user.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'trace-v4.15-rc4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rosted...
[mirror_ubuntu-bionic-kernel.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
fa6dd8a2 29#include <net/ah.h>
7c0f6ba6 30#include <linux/uaccess.h>
dfd56b8b 31#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 32#include <linux/in6.h>
33#endif
e33d4f13 34#include <asm/unaligned.h>
1da177e4 35
5424f32e 36static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 37{
5424f32e 38 struct nlattr *rt = attrs[type];
1da177e4
LT		 39 struct xfrm_algo *algp;
40
41 if (!rt)
42 return 0;
43
5424f32e 44 algp = nla_data(rt);
06cd22f8 45 if (nla_len(rt) < (int)xfrm_alg_len(algp))
31c26852
HX		 46 return -EINVAL;
47
1da177e4
LT		 48 switch (type) {
49 case XFRMA_ALG_AUTH:
1da177e4 50 case XFRMA_ALG_CRYPT:
1da177e4 51 case XFRMA_ALG_COMP:
1da177e4
LT		 52 break;
53
54 default:
55 return -EINVAL;
3ff50b79 56 }
1da177e4 57
633439f5 58 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
1da177e4
LT		 59 return 0;
60}
61
4447bb33
MW		 62static int verify_auth_trunc(struct nlattr **attrs)
63{
64 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
65 struct xfrm_algo_auth *algp;
66
67 if (!rt)
68 return 0;
69
70 algp = nla_data(rt);
1bd963a7 71 if (nla_len(rt) < (int)xfrm_alg_auth_len(algp))
4447bb33
MW		 72 return -EINVAL;
73
633439f5 74 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
4447bb33
MW		 75 return 0;
76}
77
1a6509d9
HX		 78static int verify_aead(struct nlattr **attrs)
79{
80 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
81 struct xfrm_algo_aead *algp;
82
83 if (!rt)
84 return 0;
85
86 algp = nla_data(rt);
373b8eeb 87 if (nla_len(rt) < (int)aead_len(algp))
1a6509d9
HX		 88 return -EINVAL;
89
633439f5 90 algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
1a6509d9
HX		 91 return 0;
92}
93
5424f32e 94static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 95 xfrm_address_t **addrp)
96{
5424f32e 97 struct nlattr *rt = attrs[type];
eb2971b6 98
cf5cb79f 99 if (rt && addrp)
5424f32e 100 *addrp = nla_data(rt);
eb2971b6 101}
df71837d 102
5424f32e 103static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 104{
5424f32e 105 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 106 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 107
108 if (!rt)
109 return 0;
110
5424f32e 111 uctx = nla_data(rt);
cf5cb79f 112 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 113 return -EINVAL;
114
115 return 0;
116}
117
d8647b79
SK		 118static inline int verify_replay(struct xfrm_usersa_info *p,
119 struct nlattr **attrs)
120{
121 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
ecd79187 122 struct xfrm_replay_state_esn *rs;
d8647b79 123
ecd79187
MK		 124 if (p->flags & XFRM_STATE_ESN) {
125 if (!rt)
126 return -EINVAL;
127
128 rs = nla_data(rt);
129
130 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
131 return -EINVAL;
132
5e708e47 133 if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
ecd79187
MK		 134 nla_len(rt) != sizeof(*rs))
135 return -EINVAL;
136 }
7833aa05 137
d8647b79
SK		 138 if (!rt)
139 return 0;
140
01714109
FD		 141 /* As only ESP and AH support ESN feature. */
142 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
02aadf72
SK		 143 return -EINVAL;
144
d8647b79
SK		 145 if (p->replay_window != 0)
146 return -EINVAL;
147
148 return 0;
149}
df71837d 150
1da177e4 151static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 152 struct nlattr **attrs)
1da177e4
LT		 153{
154 int err;
155
156 err = -EINVAL;
157 switch (p->family) {
158 case AF_INET:
159 break;
160
161 case AF_INET6:
dfd56b8b 162#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 163 break;
164#else
165 err = -EAFNOSUPPORT;
166 goto out;
167#endif
168
169 default:
170 goto out;
3ff50b79 171 }
1da177e4
LT		 172
173 err = -EINVAL;
174 switch (p->id.proto) {
175 case IPPROTO_AH:
4447bb33
MW		 176 if ((!attrs[XFRMA_ALG_AUTH] &&
177 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
1a6509d9 178 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 179 attrs[XFRMA_ALG_CRYPT] ||
35d2856b 180 attrs[XFRMA_ALG_COMP] ||
a0e5ef53 181 attrs[XFRMA_TFCPAD])
1da177e4
LT		 182 goto out;
183 break;
184
185 case IPPROTO_ESP:
1a6509d9
HX		 186 if (attrs[XFRMA_ALG_COMP])
187 goto out;
188 if (!attrs[XFRMA_ALG_AUTH] &&
4447bb33 189 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
1a6509d9
HX		 190 !attrs[XFRMA_ALG_CRYPT] &&
191 !attrs[XFRMA_ALG_AEAD])
192 goto out;
193 if ((attrs[XFRMA_ALG_AUTH] ||
4447bb33 194 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9
HX		 195 attrs[XFRMA_ALG_CRYPT]) &&
196 attrs[XFRMA_ALG_AEAD])
1da177e4 197 goto out;
35d2856b
MW		 198 if (attrs[XFRMA_TFCPAD] &&
199 p->mode != XFRM_MODE_TUNNEL)
200 goto out;
1da177e4
LT		 201 break;
202
203 case IPPROTO_COMP:
35a7aa08 204 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 205 attrs[XFRMA_ALG_AEAD] ||
35a7aa08 206 attrs[XFRMA_ALG_AUTH] ||
4447bb33 207 attrs[XFRMA_ALG_AUTH_TRUNC] ||
35d2856b 208 attrs[XFRMA_ALG_CRYPT] ||
a0e5ef53
TB		 209 attrs[XFRMA_TFCPAD] ||
210 (ntohl(p->id.spi) >= 0x10000))
1da177e4
LT		 211 goto out;
212 break;
213
dfd56b8b 214#if IS_ENABLED(CONFIG_IPV6)
e23c7194
MN		 215 case IPPROTO_DSTOPTS:
216 case IPPROTO_ROUTING:
35a7aa08
TG		 217 if (attrs[XFRMA_ALG_COMP] ||
218 attrs[XFRMA_ALG_AUTH] ||
4447bb33 219 attrs[XFRMA_ALG_AUTH_TRUNC] ||
1a6509d9 220 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 221 attrs[XFRMA_ALG_CRYPT] ||
222 attrs[XFRMA_ENCAP] ||
223 attrs[XFRMA_SEC_CTX] ||
35d2856b 224 attrs[XFRMA_TFCPAD] ||
35a7aa08 225 !attrs[XFRMA_COADDR])
e23c7194
MN		 226 goto out;
227 break;
228#endif
229
1da177e4
LT		 230 default:
231 goto out;
3ff50b79 232 }
1da177e4 233
1a6509d9
HX		 234 if ((err = verify_aead(attrs)))
235 goto out;
4447bb33
MW		 236 if ((err = verify_auth_trunc(attrs)))
237 goto out;
35a7aa08 238 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 239 goto out;
35a7aa08 240 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 241 goto out;
35a7aa08 242 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 243 goto out;
35a7aa08 244 if ((err = verify_sec_ctx_len(attrs)))
df71837d 245 goto out;
d8647b79
SK		 246 if ((err = verify_replay(p, attrs)))
247 goto out;
1da177e4
LT		 248
249 err = -EINVAL;
250 switch (p->mode) {
7e49e6de
MN		 251 case XFRM_MODE_TRANSPORT:
252 case XFRM_MODE_TUNNEL:
060f02a3 253 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 254 case XFRM_MODE_BEET:
1da177e4
LT		 255 break;
256
257 default:
258 goto out;
3ff50b79 259 }
1da177e4
LT		 260
261 err = 0;
262
263out:
264 return err;
265}
266
267static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
6f2f19ed 268 struct xfrm_algo_desc *(*get_byname)(const char *, int),
5424f32e 269 struct nlattr *rta)
1da177e4 270{
1da177e4
LT		 271 struct xfrm_algo *p, *ualg;
272 struct xfrm_algo_desc *algo;
273
274 if (!rta)
275 return 0;
276
5424f32e 277 ualg = nla_data(rta);
1da177e4
LT		 278
279 algo = get_byname(ualg->alg_name, 1);
280 if (!algo)
281 return -ENOSYS;
282 *props = algo->desc.sadb_alg_id;
283
0f99be0d 284 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 285 if (!p)
286 return -ENOMEM;
287
04ff1260 288 strcpy(p->alg_name, algo->name);
1da177e4
LT		 289 *algpp = p;
290 return 0;
291}
292
69b0137f
HX		 293static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
294{
295 struct xfrm_algo *p, *ualg;
296 struct xfrm_algo_desc *algo;
297
298 if (!rta)
299 return 0;
300
301 ualg = nla_data(rta);
302
303 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
304 if (!algo)
305 return -ENOSYS;
306 x->props.ealgo = algo->desc.sadb_alg_id;
307
308 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
309 if (!p)
310 return -ENOMEM;
311
312 strcpy(p->alg_name, algo->name);
313 x->ealg = p;
314 x->geniv = algo->uinfo.encr.geniv;
315 return 0;
316}
317
4447bb33
MW		 318static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
319 struct nlattr *rta)
320{
321 struct xfrm_algo *ualg;
322 struct xfrm_algo_auth *p;
323 struct xfrm_algo_desc *algo;
324
325 if (!rta)
326 return 0;
327
328 ualg = nla_data(rta);
329
330 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
331 if (!algo)
332 return -ENOSYS;
333 *props = algo->desc.sadb_alg_id;
334
335 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
336 if (!p)
337 return -ENOMEM;
338
339 strcpy(p->alg_name, algo->name);
340 p->alg_key_len = ualg->alg_key_len;
341 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
342 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
343
344 *algpp = p;
345 return 0;
346}
347
348static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
349 struct nlattr *rta)
350{
351 struct xfrm_algo_auth *p, *ualg;
352 struct xfrm_algo_desc *algo;
353
354 if (!rta)
355 return 0;
356
357 ualg = nla_data(rta);
358
359 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
360 if (!algo)
361 return -ENOSYS;
689f1c9d 362 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
4447bb33
MW		 363 return -EINVAL;
364 *props = algo->desc.sadb_alg_id;
365
366 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
367 if (!p)
368 return -ENOMEM;
369
370 strcpy(p->alg_name, algo->name);
371 if (!p->alg_trunc_len)
372 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
373
374 *algpp = p;
375 return 0;
376}
377
69b0137f 378static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
1a6509d9
HX		 379{
380 struct xfrm_algo_aead *p, *ualg;
381 struct xfrm_algo_desc *algo;
382
383 if (!rta)
384 return 0;
385
386 ualg = nla_data(rta);
387
388 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
389 if (!algo)
390 return -ENOSYS;
69b0137f 391 x->props.ealgo = algo->desc.sadb_alg_id;
1a6509d9
HX		 392
393 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
394 if (!p)
395 return -ENOMEM;
396
397 strcpy(p->alg_name, algo->name);
69b0137f
HX		 398 x->aead = p;
399 x->geniv = algo->uinfo.aead.geniv;
1a6509d9
HX		 400 return 0;
401}
402
e2b19125
SK		 403static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
404 struct nlattr *rp)
405{
406 struct xfrm_replay_state_esn *up;
5e708e47 407 unsigned int ulen;
e2b19125
SK		 408
409 if (!replay_esn || !rp)
410 return 0;
411
412 up = nla_data(rp);
ecd79187 413 ulen = xfrm_replay_state_esn_len(up);
e2b19125 414
f843ee6d
AW		 415 /* Check the overall length and the internal bitmap length to avoid
416 * potential overflow. */
5e708e47 417 if (nla_len(rp) < (int)ulen ||
f843ee6d
AW		 418 xfrm_replay_state_esn_len(replay_esn) != ulen ||
419 replay_esn->bmp_len != up->bmp_len)
e2b19125
SK		 420 return -EINVAL;
421
677e806d
AW		 422 if (up->replay_window > up->bmp_len * sizeof(__u32) * 8)
423 return -EINVAL;
424
e2b19125
SK		 425 return 0;
426}
427
d8647b79
SK		 428static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
429 struct xfrm_replay_state_esn **preplay_esn,
430 struct nlattr *rta)
431{
432 struct xfrm_replay_state_esn *p, *pp, *up;
5e708e47 433 unsigned int klen, ulen;
d8647b79
SK		 434
435 if (!rta)
436 return 0;
437
438 up = nla_data(rta);
ecd79187 439 klen = xfrm_replay_state_esn_len(up);
5e708e47 440 ulen = nla_len(rta) >= (int)klen ? klen : sizeof(*up);
d8647b79 441
ecd79187 442 p = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 443 if (!p)
444 return -ENOMEM;
445
ecd79187 446 pp = kzalloc(klen, GFP_KERNEL);
d8647b79
SK		 447 if (!pp) {
448 kfree(p);
449 return -ENOMEM;
450 }
451
ecd79187
MK		 452 memcpy(p, up, ulen);
453 memcpy(pp, up, ulen);
454
d8647b79
SK		 455 *replay_esn = p;
456 *preplay_esn = pp;
457
458 return 0;
459}
460
a1b831f2 461static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 462{
a1b831f2 463 unsigned int len = 0;
df71837d
TJ		 464
465 if (xfrm_ctx) {
466 len += sizeof(struct xfrm_user_sec_ctx);
467 len += xfrm_ctx->ctx_len;
468 }
469 return len;
470}
471
1da177e4
LT		 472static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
473{
474 memcpy(&x->id, &p->id, sizeof(x->id));
475 memcpy(&x->sel, &p->sel, sizeof(x->sel));
476 memcpy(&x->lft, &p->lft, sizeof(x->lft));
477 x->props.mode = p->mode;
33fce60d
FD		 478 x->props.replay_window = min_t(unsigned int, p->replay_window,
479 sizeof(x->replay.bitmap) * 8);
1da177e4
LT		 480 x->props.reqid = p->reqid;
481 x->props.family = p->family;
54489c14 482 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 483 x->props.flags = p->flags;
196b0036 484
ccf9b3b8 485 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 486 x->sel.family = p->family;
1da177e4
LT		 487}
488
d51d081d
JHS		 489/*
490 * someday when pfkey also has support, we could have the code
491 * somehow made shareable and move it to xfrm_state.c - JHS
492 *
493*/
e3ac104d
MK		 494static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
495 int update_esn)
d51d081d 496{
5424f32e 497 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
e3ac104d 498 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
5424f32e
TG		 499 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
500 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
501 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 502
d8647b79
SK		 503 if (re) {
504 struct xfrm_replay_state_esn *replay_esn;
505 replay_esn = nla_data(re);
506 memcpy(x->replay_esn, replay_esn,
507 xfrm_replay_state_esn_len(replay_esn));
508 memcpy(x->preplay_esn, replay_esn,
509 xfrm_replay_state_esn_len(replay_esn));
510 }
511
d51d081d
JHS		 512 if (rp) {
513 struct xfrm_replay_state *replay;
5424f32e 514 replay = nla_data(rp);
d51d081d
JHS		 515 memcpy(&x->replay, replay, sizeof(*replay));
516 memcpy(&x->preplay, replay, sizeof(*replay));
517 }
518
519 if (lt) {
520 struct xfrm_lifetime_cur *ltime;
5424f32e 521 ltime = nla_data(lt);
d51d081d
JHS		 522 x->curlft.bytes = ltime->bytes;
523 x->curlft.packets = ltime->packets;
524 x->curlft.add_time = ltime->add_time;
525 x->curlft.use_time = ltime->use_time;
526 }
527
cf5cb79f 528 if (et)
5424f32e 529 x->replay_maxage = nla_get_u32(et);
d51d081d 530
cf5cb79f 531 if (rt)
5424f32e 532 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 533}
534
fc34acd3
AD		 535static struct xfrm_state *xfrm_state_construct(struct net *net,
536 struct xfrm_usersa_info *p,
5424f32e 537 struct nlattr **attrs,
1da177e4
LT		 538 int *errp)
539{
fc34acd3 540 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 541 int err = -ENOMEM;
542
543 if (!x)
544 goto error_no_put;
545
546 copy_from_user_state(x, p);
547
a947b0a9
ND		 548 if (attrs[XFRMA_SA_EXTRA_FLAGS])
549 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
550
69b0137f 551 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
1a6509d9 552 goto error;
4447bb33
MW		 553 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
554 attrs[XFRMA_ALG_AUTH_TRUNC])))
1da177e4 555 goto error;
4447bb33
MW		 556 if (!x->props.aalgo) {
557 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
558 attrs[XFRMA_ALG_AUTH])))
559 goto error;
560 }
69b0137f 561 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 562 goto error;
563 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
564 xfrm_calg_get_byname,
35a7aa08 565 attrs[XFRMA_ALG_COMP])))
1da177e4 566 goto error;
fd21150a
TG		 567
568 if (attrs[XFRMA_ENCAP]) {
569 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
570 sizeof(*x->encap), GFP_KERNEL);
571 if (x->encap == NULL)
572 goto error;
573 }
574
35d2856b
MW		 575 if (attrs[XFRMA_TFCPAD])
576 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
577
fd21150a
TG		 578 if (attrs[XFRMA_COADDR]) {
579 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
580 sizeof(*x->coaddr), GFP_KERNEL);
581 if (x->coaddr == NULL)
582 goto error;
583 }
584
6f26b61e
JHS		 585 xfrm_mark_get(attrs, &x->mark);
586
077fbac4
LC		 587 if (attrs[XFRMA_OUTPUT_MARK])
588 x->props.output_mark = nla_get_u32(attrs[XFRMA_OUTPUT_MARK]);
589
ffdb5211 590 err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
1da177e4
LT		 591 if (err)
592 goto error;
593
2f30ea50
MK		 594 if (attrs[XFRMA_SEC_CTX]) {
595 err = security_xfrm_state_alloc(x,
596 nla_data(attrs[XFRMA_SEC_CTX]));
597 if (err)
598 goto error;
599 }
df71837d 600
152afb9b
IT		 601 if (attrs[XFRMA_OFFLOAD_DEV]) {
602 err = xfrm_dev_state_add(net, x,
603 nla_data(attrs[XFRMA_OFFLOAD_DEV]));
604 if (err)
605 goto error;
606 }
d77e38e6 607
d8647b79
SK		 608 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
609 attrs[XFRMA_REPLAY_ESN_VAL])))
610 goto error;
611
1da177e4 612 x->km.seq = p->seq;
b27aeadb 613 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 614 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 615 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d 616
9fdc4883
SK		 617 if ((err = xfrm_init_replay(x)))
618 goto error;
d51d081d 619
9fdc4883 620 /* override default values from above */
e3ac104d 621 xfrm_update_ae_params(x, attrs, 0);
1da177e4
LT		 622
623 return x;
624
625error:
626 x->km.state = XFRM_STATE_DEAD;
627 xfrm_state_put(x);
628error_no_put:
629 *errp = err;
630 return NULL;
631}
632
22e70050 633static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 634 struct nlattr **attrs)
1da177e4 635{
fc34acd3 636 struct net *net = sock_net(skb->sk);
7b67c857 637 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 638 struct xfrm_state *x;
639 int err;
26b15dad 640 struct km_event c;
1da177e4 641
35a7aa08 642 err = verify_newsa_info(p, attrs);
1da177e4
LT		 643 if (err)
644 return err;
645
fc34acd3 646 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 647 if (!x)
648 return err;
649
26b15dad 650 xfrm_state_hold(x);
1da177e4
LT		 651 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
652 err = xfrm_state_add(x);
653 else
654 err = xfrm_state_update(x);
655
2e71029e 656 xfrm_audit_state_add(x, err ? 0 : 1, true);
161a09e7 657
1da177e4
LT		 658 if (err < 0) {
659 x->km.state = XFRM_STATE_DEAD;
c5d4d7d8 660 xfrm_dev_state_delete(x);
21380b81 661 __xfrm_state_put(x);
7d6dfe1f 662 goto out;
1da177e4
LT		 663 }
664
26b15dad 665 c.seq = nlh->nlmsg_seq;
15e47304 666 c.portid = nlh->nlmsg_pid;
f60f6b8f 667 c.event = nlh->nlmsg_type;
26b15dad
JHS		 668
669 km_state_notify(x, &c);
7d6dfe1f 670out:
26b15dad 671 xfrm_state_put(x);
1da177e4
LT		 672 return err;
673}
674
fc34acd3
AD		 675static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
676 struct xfrm_usersa_id *p,
5424f32e 677 struct nlattr **attrs,
eb2971b6
MN		 678 int *errp)
679{
680 struct xfrm_state *x = NULL;
6f26b61e 681 struct xfrm_mark m;
eb2971b6 682 int err;
6f26b61e 683 u32 mark = xfrm_mark_get(attrs, &m);
eb2971b6
MN		 684
685 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
686 err = -ESRCH;
6f26b61e 687 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 688 } else {
689 xfrm_address_t *saddr = NULL;
690
35a7aa08 691 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 692 if (!saddr) {
693 err = -EINVAL;
694 goto out;
695 }
696
9abbffee 697 err = -ESRCH;
6f26b61e
JHS		 698 x = xfrm_state_lookup_byaddr(net, mark,
699 &p->daddr, saddr,
221df1ed 700 p->proto, p->family);
eb2971b6
MN		 701 }
702
703 out:
704 if (!x && errp)
705 *errp = err;
706 return x;
707}
708
22e70050 709static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 710 struct nlattr **attrs)
1da177e4 711{
fc34acd3 712 struct net *net = sock_net(skb->sk);
1da177e4 713 struct xfrm_state *x;
eb2971b6 714 int err = -ESRCH;
26b15dad 715 struct km_event c;
7b67c857 716 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4 717
fc34acd3 718 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 719 if (x == NULL)
eb2971b6 720 return err;
1da177e4 721
6f68dc37 722 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 723 goto out;
724
1da177e4 725 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 726 err = -EPERM;
727 goto out;
1da177e4
LT		 728 }
729
26b15dad 730 err = xfrm_state_delete(x);
161a09e7 731
c8c05a8e
CZ		 732 if (err < 0)
733 goto out;
26b15dad
JHS		 734
735 c.seq = nlh->nlmsg_seq;
15e47304 736 c.portid = nlh->nlmsg_pid;
f60f6b8f 737 c.event = nlh->nlmsg_type;
26b15dad 738 km_state_notify(x, &c);
1da177e4 739
c8c05a8e 740out:
2e71029e 741 xfrm_audit_state_delete(x, err ? 0 : 1, true);
c8c05a8e 742 xfrm_state_put(x);
26b15dad 743 return err;
1da177e4
LT		 744}
745
746static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
747{
f778a636 748 memset(p, 0, sizeof(*p));
1da177e4
LT		 749 memcpy(&p->id, &x->id, sizeof(p->id));
750 memcpy(&p->sel, &x->sel, sizeof(p->sel));
751 memcpy(&p->lft, &x->lft, sizeof(p->lft));
752 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
e33d4f13
SV		 753 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
754 put_unaligned(x->stats.replay, &p->stats.replay);
755 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
54489c14 756 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 757 p->mode = x->props.mode;
758 p->replay_window = x->props.replay_window;
759 p->reqid = x->props.reqid;
760 p->family = x->props.family;
761 p->flags = x->props.flags;
762 p->seq = x->km.seq;
763}
764
765struct xfrm_dump_info {
766 struct sk_buff *in_skb;
767 struct sk_buff *out_skb;
768 u32 nlmsg_seq;
769 u16 nlmsg_flags;
1da177e4
LT		 770};
771
c0144bea
TG		 772static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
773{
c0144bea
TG		 774 struct xfrm_user_sec_ctx *uctx;
775 struct nlattr *attr;
68325d3b 776 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 777
778 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
779 if (attr == NULL)
780 return -EMSGSIZE;
781
782 uctx = nla_data(attr);
783 uctx->exttype = XFRMA_SEC_CTX;
784 uctx->len = ctx_size;
785 uctx->ctx_doi = s->ctx_doi;
786 uctx->ctx_alg = s->ctx_alg;
787 uctx->ctx_len = s->ctx_len;
788 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
789
790 return 0;
791}
792
d77e38e6
SK		 793static int copy_user_offload(struct xfrm_state_offload *xso, struct sk_buff *skb)
794{
795 struct xfrm_user_offload *xuo;
796 struct nlattr *attr;
797
798 attr = nla_reserve(skb, XFRMA_OFFLOAD_DEV, sizeof(*xuo));
799 if (attr == NULL)
800 return -EMSGSIZE;
801
802 xuo = nla_data(attr);
5fe0d4bd 803 memset(xuo, 0, sizeof(*xuo));
d77e38e6
SK		 804 xuo->ifindex = xso->dev->ifindex;
805 xuo->flags = xso->flags;
806
807 return 0;
808}
809
4447bb33
MW		 810static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
811{
812 struct xfrm_algo *algo;
813 struct nlattr *nla;
814
815 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
816 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
817 if (!nla)
818 return -EMSGSIZE;
819
820 algo = nla_data(nla);
4c87308b 821 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
4447bb33
MW		 822 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
823 algo->alg_key_len = auth->alg_key_len;
824
825 return 0;
826}
827
68325d3b
HX		 828/* Don't change this without updating xfrm_sa_len! */
829static int copy_to_user_state_extra(struct xfrm_state *x,
830 struct xfrm_usersa_info *p,
831 struct sk_buff *skb)
1da177e4 832{
1d1e34dd 833 int ret = 0;
d0fde795 834
1d1e34dd 835 copy_to_user_state(x, p);
68325d3b 836
a947b0a9
ND		 837 if (x->props.extra_flags) {
838 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
839 x->props.extra_flags);
840 if (ret)
841 goto out;
842 }
843
1d1e34dd
DM		 844 if (x->coaddr) {
845 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
846 if (ret)
847 goto out;
848 }
849 if (x->lastused) {
de95c4a4
ND		 850 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
851 XFRMA_PAD);
1d1e34dd
DM		 852 if (ret)
853 goto out;
854 }
855 if (x->aead) {
856 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
857 if (ret)
858 goto out;
859 }
860 if (x->aalg) {
861 ret = copy_to_user_auth(x->aalg, skb);
862 if (!ret)
863 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
864 xfrm_alg_auth_len(x->aalg), x->aalg);
865 if (ret)
866 goto out;
867 }
868 if (x->ealg) {
869 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
870 if (ret)
871 goto out;
872 }
873 if (x->calg) {
874 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
875 if (ret)
876 goto out;
877 }
878 if (x->encap) {
879 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
880 if (ret)
881 goto out;
882 }
883 if (x->tfcpad) {
884 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
885 if (ret)
886 goto out;
887 }
888 ret = xfrm_mark_put(skb, &x->mark);
889 if (ret)
890 goto out;
f293a5e3 891 if (x->replay_esn)
1d1e34dd
DM		 892 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
893 xfrm_replay_state_esn_len(x->replay_esn),
894 x->replay_esn);
f293a5e3 895 else
896 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
897 &x->replay);
898 if (ret)
899 goto out;
d77e38e6
SK		 900 if(x->xso.dev)
901 ret = copy_user_offload(&x->xso, skb);
902 if (ret)
903 goto out;
077fbac4
LC		 904 if (x->props.output_mark) {
905 ret = nla_put_u32(skb, XFRMA_OUTPUT_MARK, x->props.output_mark);
906 if (ret)
907 goto out;
908 }
8598112d
SK		 909 if (x->security)
910 ret = copy_sec_ctx(x->security, skb);
1d1e34dd
DM		 911out:
912 return ret;
68325d3b
HX		 913}
914
915static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
916{
917 struct xfrm_dump_info *sp = ptr;
918 struct sk_buff *in_skb = sp->in_skb;
919 struct sk_buff *skb = sp->out_skb;
920 struct xfrm_usersa_info *p;
921 struct nlmsghdr *nlh;
922 int err;
923
15e47304 924 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
68325d3b
HX		 925 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
926 if (nlh == NULL)
927 return -EMSGSIZE;
928
929 p = nlmsg_data(nlh);
930
931 err = copy_to_user_state_extra(x, p, skb);
1d1e34dd
DM		 932 if (err) {
933 nlmsg_cancel(skb, nlh);
934 return err;
935 }
9825069d 936 nlmsg_end(skb, nlh);
1da177e4 937 return 0;
1da177e4
LT		 938}
939
4c563f76
TT		 940static int xfrm_dump_sa_done(struct netlink_callback *cb)
941{
942 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
283bc9f3
FD		 943 struct sock *sk = cb->skb->sk;
944 struct net *net = sock_net(sk);
945
1ba5bf99
VN		 946 if (cb->args[0])
947 xfrm_state_walk_done(walk, net);
4c563f76
TT		 948 return 0;
949}
950
d3623099 951static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
1da177e4
LT		 952static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
953{
fc34acd3 954 struct net *net = sock_net(skb->sk);
4c563f76 955 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 956 struct xfrm_dump_info info;
957
4c563f76
TT		 958 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
959 sizeof(cb->args) - sizeof(cb->args[0]));
960
1da177e4
LT		 961 info.in_skb = cb->skb;
962 info.out_skb = skb;
963 info.nlmsg_seq = cb->nlh->nlmsg_seq;
964 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 965
966 if (!cb->args[0]) {
d3623099 967 struct nlattr *attrs[XFRMA_MAX+1];
870a2df4 968 struct xfrm_address_filter *filter = NULL;
d3623099
ND		 969 u8 proto = 0;
970 int err;
971
fceb6435
JB		 972 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, xfrma_policy,
973 NULL);
d3623099
ND		 974 if (err < 0)
975 return err;
976
870a2df4 977 if (attrs[XFRMA_ADDRESS_FILTER]) {
df367561
AH		 978 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
979 sizeof(*filter), GFP_KERNEL);
d3623099
ND		 980 if (filter == NULL)
981 return -ENOMEM;
d3623099
ND		 982 }
983
984 if (attrs[XFRMA_PROTO])
985 proto = nla_get_u8(attrs[XFRMA_PROTO]);
986
987 xfrm_state_walk_init(walk, proto, filter);
1ba5bf99 988 cb->args[0] = 1;
4c563f76
TT		 989 }
990
fc34acd3 991 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 992
993 return skb->len;
994}
995
996static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
997 struct xfrm_state *x, u32 seq)
998{
999 struct xfrm_dump_info info;
1000 struct sk_buff *skb;
864745d2 1001 int err;
1da177e4 1002
7deb2264 1003 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 1004 if (!skb)
1005 return ERR_PTR(-ENOMEM);
1006
1da177e4
LT		 1007 info.in_skb = in_skb;
1008 info.out_skb = skb;
1009 info.nlmsg_seq = seq;
1010 info.nlmsg_flags = 0;
1da177e4 1011
864745d2
MK		 1012 err = dump_one_state(x, 0, &info);
1013 if (err) {
1da177e4 1014 kfree_skb(skb);
864745d2 1015 return ERR_PTR(err);
1da177e4
LT		 1016 }
1017
1018 return skb;
1019}
1020
21ee543e
MK		 1021/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1022 * Must be called with RCU read lock.
1023 */
1024static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
1025 u32 pid, unsigned int group)
1026{
1027 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
1028
1029 if (nlsk)
1030 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
1031 else
1032 return -1;
1033}
1034
a1b831f2 1035static inline unsigned int xfrm_spdinfo_msgsize(void)
7deb2264
TG		 1036{
1037 return NLMSG_ALIGN(4)
1038 + nla_total_size(sizeof(struct xfrmu_spdinfo))
880a6fab
CG		 1039 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
1040 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
1041 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
7deb2264
TG		 1042}
1043
e071041b 1044static int build_spdinfo(struct sk_buff *skb, struct net *net,
15e47304 1045 u32 portid, u32 seq, u32 flags)
ecfd6b18 1046{
5a6d3416
JHS		 1047 struct xfrmk_spdinfo si;
1048 struct xfrmu_spdinfo spc;
1049 struct xfrmu_spdhinfo sph;
880a6fab 1050 struct xfrmu_spdhthresh spt4, spt6;
ecfd6b18 1051 struct nlmsghdr *nlh;
1d1e34dd 1052 int err;
ecfd6b18 1053 u32 *f;
880a6fab 1054 unsigned lseq;
ecfd6b18 1055
15e47304 1056 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
25985edc 1057 if (nlh == NULL) /* shouldn't really happen ... */
ecfd6b18
JHS		 1058 return -EMSGSIZE;
1059
1060 f = nlmsg_data(nlh);
1061 *f = flags;
e071041b 1062 xfrm_spd_getinfo(net, &si);
5a6d3416
JHS		 1063 spc.incnt = si.incnt;
1064 spc.outcnt = si.outcnt;
1065 spc.fwdcnt = si.fwdcnt;
1066 spc.inscnt = si.inscnt;
1067 spc.outscnt = si.outscnt;
1068 spc.fwdscnt = si.fwdscnt;
1069 sph.spdhcnt = si.spdhcnt;
1070 sph.spdhmcnt = si.spdhmcnt;
1071
880a6fab
CG		 1072 do {
1073 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1074
1075 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1076 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1077 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1078 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1079 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1080
1d1e34dd
DM		 1081 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1082 if (!err)
1083 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
880a6fab
CG		 1084 if (!err)
1085 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1086 if (!err)
1087 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
1d1e34dd
DM		 1088 if (err) {
1089 nlmsg_cancel(skb, nlh);
1090 return err;
1091 }
ecfd6b18 1092
053c095a
JB		 1093 nlmsg_end(skb, nlh);
1094 return 0;
ecfd6b18
JHS		 1095}
1096
880a6fab
CG		 1097static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1098 struct nlattr **attrs)
1099{
1100 struct net *net = sock_net(skb->sk);
1101 struct xfrmu_spdhthresh *thresh4 = NULL;
1102 struct xfrmu_spdhthresh *thresh6 = NULL;
1103
1104 /* selector prefixlen thresholds to hash policies */
1105 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1106 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1107
1108 if (nla_len(rta) < sizeof(*thresh4))
1109 return -EINVAL;
1110 thresh4 = nla_data(rta);
1111 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1112 return -EINVAL;
1113 }
1114 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1115 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1116
1117 if (nla_len(rta) < sizeof(*thresh6))
1118 return -EINVAL;
1119 thresh6 = nla_data(rta);
1120 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1121 return -EINVAL;
1122 }
1123
1124 if (thresh4 || thresh6) {
1125 write_seqlock(&net->xfrm.policy_hthresh.lock);
1126 if (thresh4) {
1127 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1128 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1129 }
1130 if (thresh6) {
1131 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1132 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1133 }
1134 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1135
1136 xfrm_policy_hash_rebuild(net);
1137 }
1138
1139 return 0;
1140}
1141
ecfd6b18 1142static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1143 struct nlattr **attrs)
ecfd6b18 1144{
a6483b79 1145 struct net *net = sock_net(skb->sk);
ecfd6b18 1146 struct sk_buff *r_skb;
7b67c857 1147 u32 *flags = nlmsg_data(nlh);
15e47304 1148 u32 sportid = NETLINK_CB(skb).portid;
ecfd6b18 1149 u32 seq = nlh->nlmsg_seq;
2fc5f83b 1150 int err;
ecfd6b18 1151
7deb2264 1152 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 1153 if (r_skb == NULL)
1154 return -ENOMEM;
1155
2fc5f83b
GS		 1156 err = build_spdinfo(r_skb, net, sportid, seq, *flags);
1157 BUG_ON(err < 0);
ecfd6b18 1158
15e47304 1159 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
ecfd6b18
JHS		 1160}
1161
a1b831f2 1162static inline unsigned int xfrm_sadinfo_msgsize(void)
7deb2264
TG		 1163{
1164 return NLMSG_ALIGN(4)
1165 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1166 + nla_total_size(4); /* XFRMA_SAD_CNT */
1167}
1168
e071041b 1169static int build_sadinfo(struct sk_buff *skb, struct net *net,
15e47304 1170 u32 portid, u32 seq, u32 flags)
28d8909b 1171{
af11e316
JHS		 1172 struct xfrmk_sadinfo si;
1173 struct xfrmu_sadhinfo sh;
28d8909b 1174 struct nlmsghdr *nlh;
1d1e34dd 1175 int err;
28d8909b
JHS		 1176 u32 *f;
1177
15e47304 1178 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
25985edc 1179 if (nlh == NULL) /* shouldn't really happen ... */
28d8909b
JHS		 1180 return -EMSGSIZE;
1181
1182 f = nlmsg_data(nlh);
1183 *f = flags;
e071041b 1184 xfrm_sad_getinfo(net, &si);
28d8909b 1185
af11e316
JHS		 1186 sh.sadhmcnt = si.sadhmcnt;
1187 sh.sadhcnt = si.sadhcnt;
1188
1d1e34dd
DM		 1189 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1190 if (!err)
1191 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1192 if (err) {
1193 nlmsg_cancel(skb, nlh);
1194 return err;
1195 }
28d8909b 1196
053c095a
JB		 1197 nlmsg_end(skb, nlh);
1198 return 0;
28d8909b
JHS		 1199}
1200
1201static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1202 struct nlattr **attrs)
28d8909b 1203{
a6483b79 1204 struct net *net = sock_net(skb->sk);
28d8909b 1205 struct sk_buff *r_skb;
7b67c857 1206 u32 *flags = nlmsg_data(nlh);
15e47304 1207 u32 sportid = NETLINK_CB(skb).portid;
28d8909b 1208 u32 seq = nlh->nlmsg_seq;
2fc5f83b 1209 int err;
28d8909b 1210
7deb2264 1211 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 1212 if (r_skb == NULL)
1213 return -ENOMEM;
1214
2fc5f83b
GS		 1215 err = build_sadinfo(r_skb, net, sportid, seq, *flags);
1216 BUG_ON(err < 0);
28d8909b 1217
15e47304 1218 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
28d8909b
JHS		 1219}
1220
22e70050 1221static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1222 struct nlattr **attrs)
1da177e4 1223{
fc34acd3 1224 struct net *net = sock_net(skb->sk);
7b67c857 1225 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 1226 struct xfrm_state *x;
1227 struct sk_buff *resp_skb;
eb2971b6 1228 int err = -ESRCH;
1da177e4 1229
fc34acd3 1230 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 1231 if (x == NULL)
1232 goto out_noput;
1233
1234 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1235 if (IS_ERR(resp_skb)) {
1236 err = PTR_ERR(resp_skb);
1237 } else {
15e47304 1238 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1239 }
1240 xfrm_state_put(x);
1241out_noput:
1242 return err;
1243}
1244
22e70050 1245static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1246 struct nlattr **attrs)
1da177e4 1247{
fc34acd3 1248 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1249 struct xfrm_state *x;
1250 struct xfrm_userspi_info *p;
1251 struct sk_buff *resp_skb;
1252 xfrm_address_t *daddr;
1253 int family;
1254 int err;
6f26b61e
JHS		 1255 u32 mark;
1256 struct xfrm_mark m;
1da177e4 1257
7b67c857 1258 p = nlmsg_data(nlh);
776e9dd9 1259 err = verify_spi_info(p->info.id.proto, p->min, p->max);
1da177e4
LT		 1260 if (err)
1261 goto out_noput;
1262
1263 family = p->info.family;
1264 daddr = &p->info.id.daddr;
1265
1266 x = NULL;
6f26b61e
JHS		 1267
1268 mark = xfrm_mark_get(attrs, &m);
1da177e4 1269 if (p->info.seq) {
6f26b61e 1270 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
70e94e66 1271 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
1da177e4
LT		 1272 xfrm_state_put(x);
1273 x = NULL;
1274 }
1275 }
1276
1277 if (!x)
6f26b61e 1278 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
1da177e4
LT		 1279 p->info.id.proto, daddr,
1280 &p->info.saddr, 1,
1281 family);
1282 err = -ENOENT;
1283 if (x == NULL)
1284 goto out_noput;
1285
658b219e
HX		 1286 err = xfrm_alloc_spi(x, p->min, p->max);
1287 if (err)
1288 goto out;
1da177e4 1289
658b219e 1290 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 1291 if (IS_ERR(resp_skb)) {
1292 err = PTR_ERR(resp_skb);
1293 goto out;
1294 }
1295
15e47304 1296 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
1da177e4
LT		 1297
1298out:
1299 xfrm_state_put(x);
1300out_noput:
1301 return err;
1302}
1303
b798a9ed 1304static int verify_policy_dir(u8 dir)
1da177e4
LT		 1305{
1306 switch (dir) {
1307 case XFRM_POLICY_IN:
1308 case XFRM_POLICY_OUT:
1309 case XFRM_POLICY_FWD:
1310 break;
1311
1312 default:
1313 return -EINVAL;
3ff50b79 1314 }
1da177e4
LT		 1315
1316 return 0;
1317}
1318
b798a9ed 1319static int verify_policy_type(u8 type)
f7b6983f
MN		 1320{
1321 switch (type) {
1322 case XFRM_POLICY_TYPE_MAIN:
1323#ifdef CONFIG_XFRM_SUB_POLICY
1324 case XFRM_POLICY_TYPE_SUB:
1325#endif
1326 break;
1327
1328 default:
1329 return -EINVAL;
3ff50b79 1330 }
f7b6983f
MN		 1331
1332 return 0;
1333}
1334
1da177e4
LT		 1335static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1336{
e682adf0
FD		 1337 int ret;
1338
1da177e4
LT		 1339 switch (p->share) {
1340 case XFRM_SHARE_ANY:
1341 case XFRM_SHARE_SESSION:
1342 case XFRM_SHARE_USER:
1343 case XFRM_SHARE_UNIQUE:
1344 break;
1345
1346 default:
1347 return -EINVAL;
3ff50b79 1348 }
1da177e4
LT		 1349
1350 switch (p->action) {
1351 case XFRM_POLICY_ALLOW:
1352 case XFRM_POLICY_BLOCK:
1353 break;
1354
1355 default:
1356 return -EINVAL;
3ff50b79 1357 }
1da177e4
LT		 1358
1359 switch (p->sel.family) {
1360 case AF_INET:
1361 break;
1362
1363 case AF_INET6:
dfd56b8b 1364#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 1365 break;
1366#else
1367 return -EAFNOSUPPORT;
1368#endif
1369
1370 default:
1371 return -EINVAL;
3ff50b79 1372 }
1da177e4 1373
e682adf0
FD		 1374 ret = verify_policy_dir(p->dir);
1375 if (ret)
1376 return ret;
1377 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1378 return -EINVAL;
1379
1380 return 0;
1da177e4
LT		 1381}
1382
5424f32e 1383static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 1384{
5424f32e 1385 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1386 struct xfrm_user_sec_ctx *uctx;
1387
1388 if (!rt)
1389 return 0;
1390
5424f32e 1391 uctx = nla_data(rt);
52a4c640 1392 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
df71837d
TJ		 1393}
1394
1da177e4
LT		 1395static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1396 int nr)
1397{
1398 int i;
1399
1400 xp->xfrm_nr = nr;
1401 for (i = 0; i < nr; i++, ut++) {
1402 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1403
1404 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1405 memcpy(&t->saddr, &ut->saddr,
1406 sizeof(xfrm_address_t));
1407 t->reqid = ut->reqid;
1408 t->mode = ut->mode;
1409 t->share = ut->share;
1410 t->optional = ut->optional;
1411 t->aalgos = ut->aalgos;
1412 t->ealgos = ut->ealgos;
1413 t->calgos = ut->calgos;
c5d18e98
HX		 1414 /* If all masks are ~0, then we allow all algorithms. */
1415 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 1416 t->encap_family = ut->family;
1da177e4
LT		 1417 }
1418}
1419
b4ad86bf
DM		 1420static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1421{
732706af 1422 u16 prev_family;
b4ad86bf
DM		 1423 int i;
1424
1425 if (nr > XFRM_MAX_DEPTH)
1426 return -EINVAL;
1427
732706af
SK		 1428 prev_family = family;
1429
b4ad86bf
DM		 1430 for (i = 0; i < nr; i++) {
1431 /* We never validated the ut->family value, so many
1432 * applications simply leave it at zero. The check was
1433 * never made and ut->family was ignored because all
1434 * templates could be assumed to have the same family as
1435 * the policy itself. Now that we will have ipv4-in-ipv6
1436 * and ipv6-in-ipv4 tunnels, this is no longer true.
1437 */
1438 if (!ut[i].family)
1439 ut[i].family = family;
1440
732706af
SK		 1441 if ((ut[i].mode == XFRM_MODE_TRANSPORT) &&
1442 (ut[i].family != prev_family))
1443 return -EINVAL;
1444
1445 prev_family = ut[i].family;
1446
b4ad86bf
DM		 1447 switch (ut[i].family) {
1448 case AF_INET:
1449 break;
dfd56b8b 1450#if IS_ENABLED(CONFIG_IPV6)
b4ad86bf
DM		 1451 case AF_INET6:
1452 break;
1453#endif
1454 default:
1455 return -EINVAL;
3ff50b79 1456 }
6a53b759
CW		 1457
1458 switch (ut[i].id.proto) {
1459 case IPPROTO_AH:
1460 case IPPROTO_ESP:
1461 case IPPROTO_COMP:
1462#if IS_ENABLED(CONFIG_IPV6)
1463 case IPPROTO_ROUTING:
1464 case IPPROTO_DSTOPTS:
1465#endif
1466 case IPSEC_PROTO_ANY:
1467 break;
1468 default:
1469 return -EINVAL;
1470 }
1471
b4ad86bf
DM		 1472 }
1473
1474 return 0;
1475}
1476
5424f32e 1477static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1478{
5424f32e 1479 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1480
1481 if (!rt) {
1482 pol->xfrm_nr = 0;
1483 } else {
5424f32e
TG		 1484 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1485 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1486 int err;
1da177e4 1487
b4ad86bf
DM		 1488 err = validate_tmpl(nr, utmpl, pol->family);
1489 if (err)
1490 return err;
1da177e4 1491
5424f32e 1492 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1493 }
1494 return 0;
1495}
1496
5424f32e 1497static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1498{
5424f32e 1499 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1500 struct xfrm_userpolicy_type *upt;
b798a9ed 1501 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1502 int err;
1503
1504 if (rt) {
5424f32e 1505 upt = nla_data(rt);
f7b6983f
MN		 1506 type = upt->type;
1507 }
1508
1509 err = verify_policy_type(type);
1510 if (err)
1511 return err;
1512
1513 *tp = type;
1514 return 0;
1515}
1516
1da177e4
LT		 1517static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1518{
1519 xp->priority = p->priority;
1520 xp->index = p->index;
1521 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1522 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1523 xp->action = p->action;
1524 xp->flags = p->flags;
1525 xp->family = p->sel.family;
1526 /* XXX xp->share = p->share; */
1527}
1528
1529static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1530{
7b789836 1531 memset(p, 0, sizeof(*p));
1da177e4
LT		 1532 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1533 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1534 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1535 p->priority = xp->priority;
1536 p->index = xp->index;
1537 p->sel.family = xp->family;
1538 p->dir = dir;
1539 p->action = xp->action;
1540 p->flags = xp->flags;
1541 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1542}
1543
fc34acd3 1544static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1545{
fc34acd3 1546 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1547 int err;
1548
1549 if (!xp) {
1550 *errp = -ENOMEM;
1551 return NULL;
1552 }
1553
1554 copy_from_user_policy(xp, p);
df71837d 1555
35a7aa08 1556 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1557 if (err)
1558 goto error;
1559
35a7aa08
TG		 1560 if (!(err = copy_from_user_tmpl(xp, attrs)))
1561 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1562 if (err)
1563 goto error;
1da177e4 1564
295fae56
JHS		 1565 xfrm_mark_get(attrs, &xp->mark);
1566
1da177e4 1567 return xp;
f7b6983f
MN		 1568 error:
1569 *errp = err;
12a169e7 1570 xp->walk.dead = 1;
64c31b3f 1571 xfrm_policy_destroy(xp);
f7b6983f 1572 return NULL;
1da177e4
LT		 1573}
1574
22e70050 1575static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1576 struct nlattr **attrs)
1da177e4 1577{
fc34acd3 1578 struct net *net = sock_net(skb->sk);
7b67c857 1579 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1580 struct xfrm_policy *xp;
26b15dad 1581 struct km_event c;
1da177e4
LT		 1582 int err;
1583 int excl;
1584
1585 err = verify_newpolicy_info(p);
df71837d
TJ		 1586 if (err)
1587 return err;
35a7aa08 1588 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1589 if (err)
1590 return err;
1591
fc34acd3 1592 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1593 if (!xp)
1594 return err;
1595
25985edc 1596 /* shouldn't excl be based on nlh flags??
26b15dad
JHS		 1597 * Aha! this is anti-netlink really i.e more pfkey derived
1598 * in netlink excl is a flag and you wouldnt need
1599 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1600 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1601 err = xfrm_policy_insert(p->dir, xp, excl);
2e71029e 1602 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
161a09e7 1603
1da177e4 1604 if (err) {
03e1ad7b 1605 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1606 kfree(xp);
1607 return err;
1608 }
1609
f60f6b8f 1610 c.event = nlh->nlmsg_type;
26b15dad 1611 c.seq = nlh->nlmsg_seq;
15e47304 1612 c.portid = nlh->nlmsg_pid;
26b15dad
JHS		 1613 km_policy_notify(xp, p->dir, &c);
1614
1da177e4
LT		 1615 xfrm_pol_put(xp);
1616
1617 return 0;
1618}
1619
1620static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1621{
1622 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1623 int i;
1624
1625 if (xp->xfrm_nr == 0)
1626 return 0;
1627
1628 for (i = 0; i < xp->xfrm_nr; i++) {
1629 struct xfrm_user_tmpl *up = &vec[i];
1630 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1631
1f86840f 1632 memset(up, 0, sizeof(*up));
1da177e4 1633 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1634 up->family = kp->encap_family;
1da177e4
LT		 1635 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1636 up->reqid = kp->reqid;
1637 up->mode = kp->mode;
1638 up->share = kp->share;
1639 up->optional = kp->optional;
1640 up->aalgos = kp->aalgos;
1641 up->ealgos = kp->ealgos;
1642 up->calgos = kp->calgos;
1643 }
df71837d 1644
c0144bea
TG		 1645 return nla_put(skb, XFRMA_TMPL,
1646 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1647}
1648
1649static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1650{
1651 if (x->security) {
1652 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1653 }
1654 return 0;
0d681623 1655}
df71837d 1656
0d681623
SH		 1657static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1658{
1d1e34dd 1659 if (xp->security)
0d681623 1660 return copy_sec_ctx(xp->security, skb);
0d681623 1661 return 0;
df71837d 1662}
a1b831f2 1663static inline unsigned int userpolicy_type_attrsize(void)
cfbfd45a
TG		 1664{
1665#ifdef CONFIG_XFRM_SUB_POLICY
1666 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1667#else
1668 return 0;
1669#endif
1670}
df71837d 1671
f7b6983f 1672#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1673static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1674{
c0144bea
TG		 1675 struct xfrm_userpolicy_type upt = {
1676 .type = type,
1677 };
f7b6983f 1678
c0144bea 1679 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1680}
1681
1682#else
b798a9ed 1683static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1684{
1685 return 0;
1686}
1687#endif
1688
1da177e4
LT		 1689static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1690{
1691 struct xfrm_dump_info *sp = ptr;
1692 struct xfrm_userpolicy_info *p;
1693 struct sk_buff *in_skb = sp->in_skb;
1694 struct sk_buff *skb = sp->out_skb;
1695 struct nlmsghdr *nlh;
1d1e34dd 1696 int err;
1da177e4 1697
15e47304 1698 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
79b8b7f4
TG		 1699 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1700 if (nlh == NULL)
1701 return -EMSGSIZE;
1da177e4 1702
7b67c857 1703 p = nlmsg_data(nlh);
1da177e4 1704 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 1705 err = copy_to_user_tmpl(xp, skb);
1706 if (!err)
1707 err = copy_to_user_sec_ctx(xp, skb);
1708 if (!err)
1709 err = copy_to_user_policy_type(xp->type, skb);
1710 if (!err)
1711 err = xfrm_mark_put(skb, &xp->mark);
1712 if (err) {
1713 nlmsg_cancel(skb, nlh);
1714 return err;
1715 }
9825069d 1716 nlmsg_end(skb, nlh);
1da177e4 1717 return 0;
1da177e4
LT		 1718}
1719
4c563f76
TT		 1720static int xfrm_dump_policy_done(struct netlink_callback *cb)
1721{
1137b5e2 1722 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
283bc9f3 1723 struct net *net = sock_net(cb->skb->sk);
4c563f76 1724
283bc9f3 1725 xfrm_policy_walk_done(walk, net);
4c563f76
TT		 1726 return 0;
1727}
1728
1137b5e2
HX		 1729static int xfrm_dump_policy_start(struct netlink_callback *cb)
1730{
1731 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1732
1733 BUILD_BUG_ON(sizeof(*walk) > sizeof(cb->args));
1734
1735 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1736 return 0;
1737}
1738
1da177e4
LT		 1739static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1740{
fc34acd3 1741 struct net *net = sock_net(skb->sk);
1137b5e2 1742 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *)cb->args;
1da177e4
LT		 1743 struct xfrm_dump_info info;
1744
1745 info.in_skb = cb->skb;
1746 info.out_skb = skb;
1747 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1748 info.nlmsg_flags = NLM_F_MULTI;
4c563f76 1749
fc34acd3 1750 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1751
1752 return skb->len;
1753}
1754
1755static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1756 struct xfrm_policy *xp,
1757 int dir, u32 seq)
1758{
1759 struct xfrm_dump_info info;
1760 struct sk_buff *skb;
c2546372 1761 int err;
1da177e4 1762
7deb2264 1763 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1764 if (!skb)
1765 return ERR_PTR(-ENOMEM);
1766
1da177e4
LT		 1767 info.in_skb = in_skb;
1768 info.out_skb = skb;
1769 info.nlmsg_seq = seq;
1770 info.nlmsg_flags = 0;
1da177e4 1771
c2546372
MK		 1772 err = dump_one_policy(xp, dir, 0, &info);
1773 if (err) {
1da177e4 1774 kfree_skb(skb);
c2546372 1775 return ERR_PTR(err);
1da177e4
LT		 1776 }
1777
1778 return skb;
1779}
1780
22e70050 1781static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1782 struct nlattr **attrs)
1da177e4 1783{
fc34acd3 1784 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1785 struct xfrm_policy *xp;
1786 struct xfrm_userpolicy_id *p;
b798a9ed 1787 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1788 int err;
26b15dad 1789 struct km_event c;
1da177e4 1790 int delete;
295fae56
JHS		 1791 struct xfrm_mark m;
1792 u32 mark = xfrm_mark_get(attrs, &m);
1da177e4 1793
7b67c857 1794 p = nlmsg_data(nlh);
1da177e4
LT		 1795 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1796
35a7aa08 1797 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1798 if (err)
1799 return err;
1800
1da177e4
LT		 1801 err = verify_policy_dir(p->dir);
1802 if (err)
1803 return err;
1804
1805 if (p->index)
295fae56 1806 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
df71837d 1807 else {
5424f32e 1808 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1809 struct xfrm_sec_ctx *ctx;
df71837d 1810
35a7aa08 1811 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1812 if (err)
1813 return err;
1814
2c8dd116 1815 ctx = NULL;
df71837d 1816 if (rt) {
5424f32e 1817 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1818
52a4c640 1819 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 1820 if (err)
df71837d 1821 return err;
2c8dd116 1822 }
295fae56 1823 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
6f26b61e 1824 ctx, delete, &err);
03e1ad7b 1825 security_xfrm_policy_free(ctx);
df71837d 1826 }
1da177e4
LT		 1827 if (xp == NULL)
1828 return -ENOENT;
1829
1830 if (!delete) {
1831 struct sk_buff *resp_skb;
1832
1833 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1834 if (IS_ERR(resp_skb)) {
1835 err = PTR_ERR(resp_skb);
1836 } else {
a6483b79 1837 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
15e47304 1838 NETLINK_CB(skb).portid);
1da177e4 1839 }
26b15dad 1840 } else {
2e71029e 1841 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
13fcfbb0
DM		 1842
1843 if (err != 0)
c8c05a8e 1844 goto out;
13fcfbb0 1845
e7443892 1846 c.data.byid = p->index;
f60f6b8f 1847 c.event = nlh->nlmsg_type;
26b15dad 1848 c.seq = nlh->nlmsg_seq;
15e47304 1849 c.portid = nlh->nlmsg_pid;
26b15dad 1850 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1851 }
1852
c8c05a8e 1853out:
ef41aaa0 1854 xfrm_pol_put(xp);
1da177e4
LT		 1855 return err;
1856}
1857
22e70050 1858static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1859 struct nlattr **attrs)
1da177e4 1860{
fc34acd3 1861 struct net *net = sock_net(skb->sk);
26b15dad 1862 struct km_event c;
7b67c857 1863 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
4aa2e62c 1864 int err;
1da177e4 1865
2e71029e 1866 err = xfrm_state_flush(net, p->proto, true);
9e64cc95
JHS		 1867 if (err) {
1868 if (err == -ESRCH) /* empty table */
1869 return 0;
069c474e 1870 return err;
9e64cc95 1871 }
bf08867f 1872 c.data.proto = p->proto;
f60f6b8f 1873 c.event = nlh->nlmsg_type;
26b15dad 1874 c.seq = nlh->nlmsg_seq;
15e47304 1875 c.portid = nlh->nlmsg_pid;
7067802e 1876 c.net = net;
26b15dad
JHS		 1877 km_state_notify(NULL, &c);
1878
1da177e4
LT		 1879 return 0;
1880}
1881
a1b831f2 1882static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state *x)
7deb2264 1883{
a1b831f2 1884 unsigned int replay_size = x->replay_esn ?
d8647b79
SK		 1885 xfrm_replay_state_esn_len(x->replay_esn) :
1886 sizeof(struct xfrm_replay_state);
1887
7deb2264 1888 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
d8647b79 1889 + nla_total_size(replay_size)
de95c4a4 1890 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
6f26b61e 1891 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 1892 + nla_total_size(4) /* XFRM_AE_RTHR */
1893 + nla_total_size(4); /* XFRM_AE_ETHR */
1894}
d51d081d 1895
214e005b 1896static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
d51d081d
JHS		 1897{
1898 struct xfrm_aevent_id *id;
1899 struct nlmsghdr *nlh;
1d1e34dd 1900 int err;
d51d081d 1901
15e47304 1902 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
79b8b7f4
TG		 1903 if (nlh == NULL)
1904 return -EMSGSIZE;
d51d081d 1905
7b67c857 1906 id = nlmsg_data(nlh);
931e79d7 1907 memset(&id->sa_id, 0, sizeof(id->sa_id));
9b7a787d 1908 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
d51d081d
JHS		 1909 id->sa_id.spi = x->id.spi;
1910 id->sa_id.family = x->props.family;
1911 id->sa_id.proto = x->id.proto;
9b7a787d 1912 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
2b5f6dcc 1913 id->reqid = x->props.reqid;
d51d081d
JHS		 1914 id->flags = c->data.aevent;
1915
d0fde795 1916 if (x->replay_esn) {
1d1e34dd
DM		 1917 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1918 xfrm_replay_state_esn_len(x->replay_esn),
1919 x->replay_esn);
d0fde795 1920 } else {
1d1e34dd
DM		 1921 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1922 &x->replay);
d0fde795 1923 }
1d1e34dd
DM		 1924 if (err)
1925 goto out_cancel;
de95c4a4
ND		 1926 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
1927 XFRMA_PAD);
1d1e34dd
DM		 1928 if (err)
1929 goto out_cancel;
d51d081d 1930
1d1e34dd
DM		 1931 if (id->flags & XFRM_AE_RTHR) {
1932 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1933 if (err)
1934 goto out_cancel;
1935 }
1936 if (id->flags & XFRM_AE_ETHR) {
1937 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1938 x->replay_maxage * 10 / HZ);
1939 if (err)
1940 goto out_cancel;
1941 }
1942 err = xfrm_mark_put(skb, &x->mark);
1943 if (err)
1944 goto out_cancel;
6f26b61e 1945
053c095a
JB		 1946 nlmsg_end(skb, nlh);
1947 return 0;
d51d081d 1948
1d1e34dd 1949out_cancel:
9825069d 1950 nlmsg_cancel(skb, nlh);
1d1e34dd 1951 return err;
d51d081d
JHS		 1952}
1953
22e70050 1954static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1955 struct nlattr **attrs)
d51d081d 1956{
fc34acd3 1957 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1958 struct xfrm_state *x;
1959 struct sk_buff *r_skb;
1960 int err;
1961 struct km_event c;
6f26b61e
JHS		 1962 u32 mark;
1963 struct xfrm_mark m;
7b67c857 1964 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1965 struct xfrm_usersa_id *id = &p->sa_id;
1966
6f26b61e
JHS		 1967 mark = xfrm_mark_get(attrs, &m);
1968
1969 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
d8647b79 1970 if (x == NULL)
d51d081d 1971 return -ESRCH;
d8647b79
SK		 1972
1973 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1974 if (r_skb == NULL) {
1975 xfrm_state_put(x);
1976 return -ENOMEM;
d51d081d
JHS		 1977 }
1978
1979 /*
1980 * XXX: is this lock really needed - none of the other
1981 * gets lock (the concern is things getting updated
1982 * while we are still reading) - jhs
1983 */
1984 spin_lock_bh(&x->lock);
1985 c.data.aevent = p->flags;
1986 c.seq = nlh->nlmsg_seq;
15e47304 1987 c.portid = nlh->nlmsg_pid;
d51d081d 1988
2fc5f83b
GS		 1989 err = build_aevent(r_skb, x, &c);
1990 BUG_ON(err < 0);
1991
15e47304 1992 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
d51d081d
JHS		 1993 spin_unlock_bh(&x->lock);
1994 xfrm_state_put(x);
1995 return err;
1996}
1997
22e70050 1998static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1999 struct nlattr **attrs)
d51d081d 2000{
fc34acd3 2001 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 2002 struct xfrm_state *x;
2003 struct km_event c;
02d0892f 2004 int err = -EINVAL;
6f26b61e
JHS		 2005 u32 mark = 0;
2006 struct xfrm_mark m;
7b67c857 2007 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e 2008 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
d8647b79 2009 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
5424f32e 2010 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
4e077237
MR		 2011 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
2012 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d 2013
4e077237 2014 if (!lt && !rp && !re && !et && !rt)
d51d081d
JHS		 2015 return err;
2016
2017 /* pedantic mode - thou shalt sayeth replaceth */
2018 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
2019 return err;
2020
6f26b61e
JHS		 2021 mark = xfrm_mark_get(attrs, &m);
2022
2023 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 2024 if (x == NULL)
2025 return -ESRCH;
2026
2027 if (x->km.state != XFRM_STATE_VALID)
2028 goto out;
2029
4479ff76 2030 err = xfrm_replay_verify_len(x->replay_esn, re);
e2b19125
SK		 2031 if (err)
2032 goto out;
2033
d51d081d 2034 spin_lock_bh(&x->lock);
e3ac104d 2035 xfrm_update_ae_params(x, attrs, 1);
d51d081d 2036 spin_unlock_bh(&x->lock);
d51d081d
JHS		 2037
2038 c.event = nlh->nlmsg_type;
2039 c.seq = nlh->nlmsg_seq;
15e47304 2040 c.portid = nlh->nlmsg_pid;
d51d081d
JHS		 2041 c.data.aevent = XFRM_AE_CU;
2042 km_state_notify(x, &c);
2043 err = 0;
2044out:
2045 xfrm_state_put(x);
2046 return err;
2047}
2048
22e70050 2049static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2050 struct nlattr **attrs)
1da177e4 2051{
fc34acd3 2052 struct net *net = sock_net(skb->sk);
f7b6983f 2053 struct km_event c;
b798a9ed 2054 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 2055 int err;
2056
35a7aa08 2057 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2058 if (err)
2059 return err;
26b15dad 2060
2e71029e 2061 err = xfrm_policy_flush(net, type, true);
2f1eb65f
JHS		 2062 if (err) {
2063 if (err == -ESRCH) /* empty table */
2064 return 0;
069c474e 2065 return err;
2f1eb65f
JHS		 2066 }
2067
f7b6983f 2068 c.data.type = type;
f60f6b8f 2069 c.event = nlh->nlmsg_type;
26b15dad 2070 c.seq = nlh->nlmsg_seq;
15e47304 2071 c.portid = nlh->nlmsg_pid;
7067802e 2072 c.net = net;
26b15dad 2073 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 2074 return 0;
2075}
2076
22e70050 2077static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2078 struct nlattr **attrs)
6c5c8ca7 2079{
fc34acd3 2080 struct net *net = sock_net(skb->sk);
6c5c8ca7 2081 struct xfrm_policy *xp;
7b67c857 2082 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 2083 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 2084 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7 2085 int err = -ENOENT;
295fae56
JHS		 2086 struct xfrm_mark m;
2087 u32 mark = xfrm_mark_get(attrs, &m);
6c5c8ca7 2088
35a7aa08 2089 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 2090 if (err)
2091 return err;
2092
c8bf4d04
TT		 2093 err = verify_policy_dir(p->dir);
2094 if (err)
2095 return err;
2096
6c5c8ca7 2097 if (p->index)
295fae56 2098 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
6c5c8ca7 2099 else {
5424f32e 2100 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 2101 struct xfrm_sec_ctx *ctx;
6c5c8ca7 2102
35a7aa08 2103 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 2104 if (err)
2105 return err;
2106
2c8dd116 2107 ctx = NULL;
6c5c8ca7 2108 if (rt) {
5424f32e 2109 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 2110
52a4c640 2111 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
03e1ad7b 2112 if (err)
6c5c8ca7 2113 return err;
2c8dd116 2114 }
295fae56 2115 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
6f26b61e 2116 &p->sel, ctx, 0, &err);
03e1ad7b 2117 security_xfrm_policy_free(ctx);
6c5c8ca7 2118 }
6c5c8ca7 2119 if (xp == NULL)
ef41aaa0 2120 return -ENOENT;
03e1ad7b 2121
ea2dea9d 2122 if (unlikely(xp->walk.dead))
6c5c8ca7 2123 goto out;
6c5c8ca7 2124
6c5c8ca7
JHS		 2125 err = 0;
2126 if (up->hard) {
2127 xfrm_policy_delete(xp, p->dir);
2e71029e 2128 xfrm_audit_policy_delete(xp, 1, true);
6c5c8ca7 2129 }
c6bb8136 2130 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
6c5c8ca7
JHS		 2131
2132out:
2133 xfrm_pol_put(xp);
2134 return err;
2135}
2136
22e70050 2137static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2138 struct nlattr **attrs)
53bc6b4d 2139{
fc34acd3 2140 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 2141 struct xfrm_state *x;
2142 int err;
7b67c857 2143 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d 2144 struct xfrm_usersa_info *p = &ue->state;
6f26b61e 2145 struct xfrm_mark m;
928497f0 2146 u32 mark = xfrm_mark_get(attrs, &m);
53bc6b4d 2147
6f26b61e 2148 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 2149
3a765aa5 2150 err = -ENOENT;
53bc6b4d
JHS		 2151 if (x == NULL)
2152 return err;
2153
53bc6b4d 2154 spin_lock_bh(&x->lock);
3a765aa5 2155 err = -EINVAL;
53bc6b4d
JHS		 2156 if (x->km.state != XFRM_STATE_VALID)
2157 goto out;
c6bb8136 2158 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
53bc6b4d 2159
161a09e7 2160 if (ue->hard) {
53bc6b4d 2161 __xfrm_state_delete(x);
2e71029e 2162 xfrm_audit_state_delete(x, 1, true);
161a09e7 2163 }
3a765aa5 2164 err = 0;
53bc6b4d
JHS		 2165out:
2166 spin_unlock_bh(&x->lock);
2167 xfrm_state_put(x);
2168 return err;
2169}
2170
22e70050 2171static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2172 struct nlattr **attrs)
980ebd25 2173{
fc34acd3 2174 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 2175 struct xfrm_policy *xp;
2176 struct xfrm_user_tmpl *ut;
2177 int i;
5424f32e 2178 struct nlattr *rt = attrs[XFRMA_TMPL];
6f26b61e 2179 struct xfrm_mark mark;
980ebd25 2180
7b67c857 2181 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 2182 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 2183 int err = -ENOMEM;
2184
2185 if (!x)
d8eb9307 2186 goto nomem;
980ebd25 2187
6f26b61e
JHS		 2188 xfrm_mark_get(attrs, &mark);
2189
980ebd25 2190 err = verify_newpolicy_info(&ua->policy);
d8eb9307 2191 if (err)
73efc324 2192 goto free_state;
980ebd25
JHS		 2193
2194 /* build an XP */
fc34acd3 2195 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 2196 if (!xp)
2197 goto free_state;
980ebd25
JHS		 2198
2199 memcpy(&x->id, &ua->id, sizeof(ua->id));
2200 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2201 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
6f26b61e
JHS		 2202 xp->mark.m = x->mark.m = mark.m;
2203 xp->mark.v = x->mark.v = mark.v;
5424f32e 2204 ut = nla_data(rt);
980ebd25
JHS		 2205 /* extract the templates and for each call km_key */
2206 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2207 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2208 memcpy(&x->id, &t->id, sizeof(x->id));
2209 x->props.mode = t->mode;
2210 x->props.reqid = t->reqid;
2211 x->props.family = ut->family;
2212 t->aalgos = ua->aalgos;
2213 t->ealgos = ua->ealgos;
2214 t->calgos = ua->calgos;
2215 err = km_query(x, t, xp);
2216
2217 }
2218
2219 kfree(x);
2220 kfree(xp);
2221
2222 return 0;
d8eb9307 2223
d8eb9307
IJ		 2224free_state:
2225 kfree(x);
2226nomem:
2227 return err;
980ebd25
JHS		 2228}
2229
5c79de6e 2230#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 2231static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 2232 struct xfrm_kmaddress *k,
5424f32e 2233 struct nlattr **attrs, int *num)
5c79de6e 2234{
5424f32e 2235 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 2236 struct xfrm_user_migrate *um;
2237 int i, num_migrate;
2238
13c1d189
AE		 2239 if (k != NULL) {
2240 struct xfrm_user_kmaddress *uk;
2241
2242 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2243 memcpy(&k->local, &uk->local, sizeof(k->local));
2244 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2245 k->family = uk->family;
2246 k->reserved = uk->reserved;
2247 }
2248
5424f32e
TG		 2249 um = nla_data(rt);
2250 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 2251
2252 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2253 return -EINVAL;
2254
2255 for (i = 0; i < num_migrate; i++, um++, ma++) {
2256 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2257 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2258 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2259 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2260
2261 ma->proto = um->proto;
2262 ma->mode = um->mode;
2263 ma->reqid = um->reqid;
2264
2265 ma->old_family = um->old_family;
2266 ma->new_family = um->new_family;
2267 }
2268
2269 *num = i;
2270 return 0;
2271}
2272
2273static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2274 struct nlattr **attrs)
5c79de6e 2275{
7b67c857 2276 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 2277 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 2278 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 2279 u8 type;
2280 int err;
2281 int n = 0;
8d549c4f 2282 struct net *net = sock_net(skb->sk);
4ab47d47 2283 struct xfrm_encap_tmpl *encap = NULL;
5c79de6e 2284
35a7aa08 2285 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 2286 return -EINVAL;
5c79de6e 2287
13c1d189
AE		 2288 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2289
5424f32e 2290 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 2291 if (err)
2292 return err;
2293
13c1d189 2294 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 2295 if (err)
2296 return err;
2297
2298 if (!n)
2299 return 0;
2300
4ab47d47
AA		 2301 if (attrs[XFRMA_ENCAP]) {
2302 encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
2303 sizeof(*encap), GFP_KERNEL);
2304 if (!encap)
2305 return 0;
2306 }
5c79de6e 2307
4ab47d47
AA		 2308 err = xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net, encap);
2309
2310 kfree(encap);
2311
2312 return err;
5c79de6e
SS		 2313}
2314#else
2315static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 2316 struct nlattr **attrs)
5c79de6e
SS		 2317{
2318 return -ENOPROTOOPT;
2319}
2320#endif
2321
2322#ifdef CONFIG_XFRM_MIGRATE
183cad12 2323static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
5c79de6e
SS		 2324{
2325 struct xfrm_user_migrate um;
2326
2327 memset(&um, 0, sizeof(um));
2328 um.proto = m->proto;
2329 um.mode = m->mode;
2330 um.reqid = m->reqid;
2331 um.old_family = m->old_family;
2332 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2333 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2334 um.new_family = m->new_family;
2335 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2336 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2337
c0144bea 2338 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 2339}
2340
183cad12 2341static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
13c1d189
AE		 2342{
2343 struct xfrm_user_kmaddress uk;
2344
2345 memset(&uk, 0, sizeof(uk));
2346 uk.family = k->family;
2347 uk.reserved = k->reserved;
2348 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 2349 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 2350
2351 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2352}
2353
a1b831f2
AD		 2354static inline unsigned int xfrm_migrate_msgsize(int num_migrate, int with_kma,
2355 int with_encp)
7deb2264
TG		 2356{
2357 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189 2358 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
8bafd730 2359 + (with_encp ? nla_total_size(sizeof(struct xfrm_encap_tmpl)) : 0)
13c1d189
AE		 2360 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2361 + userpolicy_type_attrsize();
7deb2264
TG		 2362}
2363
183cad12
DM		 2364static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2365 int num_migrate, const struct xfrm_kmaddress *k,
8bafd730
AA		 2366 const struct xfrm_selector *sel,
2367 const struct xfrm_encap_tmpl *encap, u8 dir, u8 type)
5c79de6e 2368{
183cad12 2369 const struct xfrm_migrate *mp;
5c79de6e
SS		 2370 struct xfrm_userpolicy_id *pol_id;
2371 struct nlmsghdr *nlh;
1d1e34dd 2372 int i, err;
5c79de6e 2373
79b8b7f4
TG		 2374 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2375 if (nlh == NULL)
2376 return -EMSGSIZE;
5c79de6e 2377
7b67c857 2378 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 2379 /* copy data from selector, dir, and type to the pol_id */
2380 memset(pol_id, 0, sizeof(*pol_id));
2381 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2382 pol_id->dir = dir;
2383
1d1e34dd
DM		 2384 if (k != NULL) {
2385 err = copy_to_user_kmaddress(k, skb);
2386 if (err)
2387 goto out_cancel;
2388 }
8bafd730
AA		 2389 if (encap) {
2390 err = nla_put(skb, XFRMA_ENCAP, sizeof(*encap), encap);
2391 if (err)
2392 goto out_cancel;
2393 }
1d1e34dd
DM		 2394 err = copy_to_user_policy_type(type, skb);
2395 if (err)
2396 goto out_cancel;
5c79de6e 2397 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1d1e34dd
DM		 2398 err = copy_to_user_migrate(mp, skb);
2399 if (err)
2400 goto out_cancel;
5c79de6e
SS		 2401 }
2402
053c095a
JB		 2403 nlmsg_end(skb, nlh);
2404 return 0;
1d1e34dd
DM		 2405
2406out_cancel:
9825069d 2407 nlmsg_cancel(skb, nlh);
1d1e34dd 2408 return err;
5c79de6e
SS		 2409}
2410
183cad12
DM		 2411static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2412 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2413 const struct xfrm_kmaddress *k,
2414 const struct xfrm_encap_tmpl *encap)
5c79de6e 2415{
a6483b79 2416 struct net *net = &init_net;
5c79de6e 2417 struct sk_buff *skb;
2fc5f83b 2418 int err;
5c79de6e 2419
8bafd730
AA		 2420 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k, !!encap),
2421 GFP_ATOMIC);
5c79de6e
SS		 2422 if (skb == NULL)
2423 return -ENOMEM;
2424
2425 /* build migrate */
2fc5f83b
GS		 2426 err = build_migrate(skb, m, num_migrate, k, sel, encap, dir, type);
2427 BUG_ON(err < 0);
5c79de6e 2428
21ee543e 2429 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
5c79de6e
SS		 2430}
2431#else
183cad12
DM		 2432static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2433 const struct xfrm_migrate *m, int num_migrate,
8bafd730
AA		 2434 const struct xfrm_kmaddress *k,
2435 const struct xfrm_encap_tmpl *encap)
5c79de6e
SS		 2436{
2437 return -ENOPROTOOPT;
2438}
2439#endif
d51d081d 2440
a7bd9a45 2441#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 2442
2443static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
66f9a259 2444 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
492b558b
TG		 2445 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2446 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2447 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2448 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2449 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2450 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 2451 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 2452 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 2453 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
66f9a259 2454 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 2455 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 2456 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 2457 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 2458 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2459 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 2460 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 2461 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45 2462 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
880a6fab 2463 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
a7bd9a45 2464 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 2465};
2466
492b558b
TG		 2467#undef XMSGSIZE
2468
cf5cb79f 2469static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
c28e9304 2470 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2471 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2472 [XFRMA_LASTUSED] = { .type = NLA_U64},
2473 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
1a6509d9 2474 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 2475 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2476 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2477 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2478 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2479 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2480 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2481 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2482 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2483 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2484 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2485 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2486 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2487 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2488 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 2489 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
6f26b61e 2490 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
35d2856b 2491 [XFRMA_TFCPAD] = { .type = NLA_U32 },
d8647b79 2492 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
a947b0a9 2493 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
d3623099 2494 [XFRMA_PROTO] = { .type = NLA_U8 },
870a2df4 2495 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
d77e38e6 2496 [XFRMA_OFFLOAD_DEV] = { .len = sizeof(struct xfrm_user_offload) },
e7191358 2497 [XFRMA_OUTPUT_MARK] = { .type = NLA_U32 },
cf5cb79f
TG		 2498};
2499
880a6fab
CG		 2500static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2501 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2502 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2503};
2504
05600a79 2505static const struct xfrm_link {
5424f32e 2506 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1137b5e2 2507 int (*start)(struct netlink_callback *);
1da177e4 2508 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 2509 int (*done)(struct netlink_callback *);
880a6fab
CG		 2510 const struct nla_policy *nla_pol;
2511 int nla_max;
492b558b
TG		 2512} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2513 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2514 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2515 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 2516 .dump = xfrm_dump_sa,
2517 .done = xfrm_dump_sa_done },
492b558b
TG		 2518 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2519 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2520 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1137b5e2 2521 .start = xfrm_dump_policy_start,
4c563f76
TT		 2522 .dump = xfrm_dump_policy,
2523 .done = xfrm_dump_policy_done },
492b558b 2524 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 2525 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 2526 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 2527 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2528 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 2529 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 2530 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2531 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 2532 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2533 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 2534 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 2535 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
880a6fab
CG		 2536 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2537 .nla_pol = xfrma_spd_policy,
2538 .nla_max = XFRMA_SPD_MAX },
ecfd6b18 2539 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 2540};
2541
2d4bc933
JB		 2542static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
2543 struct netlink_ext_ack *extack)
1da177e4 2544{
a6483b79 2545 struct net *net = sock_net(skb->sk);
35a7aa08 2546 struct nlattr *attrs[XFRMA_MAX+1];
05600a79 2547 const struct xfrm_link *link;
a7bd9a45 2548 int type, err;
1da177e4 2549
74005991 2550#ifdef CONFIG_COMPAT
2bf8c476 2551 if (in_compat_syscall())
83e2d058 2552 return -EOPNOTSUPP;
74005991
FD		 2553#endif
2554
1da177e4 2555 type = nlh->nlmsg_type;
1da177e4 2556 if (type > XFRM_MSG_MAX)
1d00a4eb 2557 return -EINVAL;
1da177e4
LT		 2558
2559 type -= XFRM_MSG_BASE;
2560 link = &xfrm_dispatch[type];
2561
2562 /* All operations require privileges, even GET */
90f62cf3 2563 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
1d00a4eb 2564 return -EPERM;
1da177e4 2565
492b558b
TG		 2566 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2567 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
b8f3ab42 2568 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2569 if (link->dump == NULL)
1d00a4eb 2570 return -EINVAL;
88fc2c84 2571
80d326fa
PNA		 2572 {
2573 struct netlink_dump_control c = {
1137b5e2 2574 .start = link->start,
80d326fa
PNA		 2575 .dump = link->dump,
2576 .done = link->done,
2577 };
2578 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2579 }
1da177e4
LT		 2580 }
2581
880a6fab
CG		 2582 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2583 link->nla_max ? : XFRMA_MAX,
fe52145f 2584 link->nla_pol ? : xfrma_policy, extack);
a7bd9a45
TG		 2585 if (err < 0)
2586 return err;
1da177e4
LT		 2587
2588 if (link->doit == NULL)
1d00a4eb 2589 return -EINVAL;
1da177e4 2590
5424f32e 2591 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2592}
2593
cd40b7d3 2594static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2595{
283bc9f3
FD		 2596 struct net *net = sock_net(skb->sk);
2597
2598 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
cd40b7d3 2599 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
283bc9f3 2600 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
1da177e4
LT		 2601}
2602
a1b831f2 2603static inline unsigned int xfrm_expire_msgsize(void)
7deb2264 2604{
6f26b61e
JHS		 2605 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2606 + nla_total_size(sizeof(struct xfrm_mark));
7deb2264
TG		 2607}
2608
214e005b 2609static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
1da177e4
LT		 2610{
2611 struct xfrm_user_expire *ue;
2612 struct nlmsghdr *nlh;
1d1e34dd 2613 int err;
1da177e4 2614
15e47304 2615 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
79b8b7f4
TG		 2616 if (nlh == NULL)
2617 return -EMSGSIZE;
1da177e4 2618
7b67c857 2619 ue = nlmsg_data(nlh);
1da177e4 2620 copy_to_user_state(x, &ue->state);
d51d081d 2621 ue->hard = (c->data.hard != 0) ? 1 : 0;
e3e5fc16
MK		 2622 /* clear the padding bytes */
2623 memset(&ue->hard + 1, 0, sizeof(*ue) - offsetofend(typeof(*ue), hard));
1da177e4 2624
1d1e34dd
DM		 2625 err = xfrm_mark_put(skb, &x->mark);
2626 if (err)
2627 return err;
6f26b61e 2628
053c095a
JB		 2629 nlmsg_end(skb, nlh);
2630 return 0;
1da177e4
LT		 2631}
2632
214e005b 2633static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
1da177e4 2634{
fc34acd3 2635 struct net *net = xs_net(x);
1da177e4
LT		 2636 struct sk_buff *skb;
2637
7deb2264 2638 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2639 if (skb == NULL)
2640 return -ENOMEM;
2641
6f26b61e
JHS		 2642 if (build_expire(skb, x, c) < 0) {
2643 kfree_skb(skb);
2644 return -EMSGSIZE;
2645 }
1da177e4 2646
21ee543e 2647 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2648}
2649
214e005b 2650static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
d51d081d 2651{
fc34acd3 2652 struct net *net = xs_net(x);
d51d081d 2653 struct sk_buff *skb;
2fc5f83b 2654 int err;
d51d081d 2655
d8647b79 2656 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
d51d081d
JHS		 2657 if (skb == NULL)
2658 return -ENOMEM;
2659
2fc5f83b
GS		 2660 err = build_aevent(skb, x, c);
2661 BUG_ON(err < 0);
d51d081d 2662
21ee543e 2663 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
d51d081d
JHS		 2664}
2665
214e005b 2666static int xfrm_notify_sa_flush(const struct km_event *c)
26b15dad 2667{
7067802e 2668 struct net *net = c->net;
26b15dad
JHS		 2669 struct xfrm_usersa_flush *p;
2670 struct nlmsghdr *nlh;
2671 struct sk_buff *skb;
7deb2264 2672 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2673
7deb2264 2674 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2675 if (skb == NULL)
2676 return -ENOMEM;
26b15dad 2677
15e47304 2678 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
79b8b7f4
TG		 2679 if (nlh == NULL) {
2680 kfree_skb(skb);
2681 return -EMSGSIZE;
2682 }
26b15dad 2683
7b67c857 2684 p = nlmsg_data(nlh);
bf08867f 2685 p->proto = c->data.proto;
26b15dad 2686
9825069d 2687 nlmsg_end(skb, nlh);
26b15dad 2688
21ee543e 2689 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad
JHS		 2690}
2691
a1b831f2 2692static inline unsigned int xfrm_sa_len(struct xfrm_state *x)
26b15dad 2693{
a1b831f2 2694 unsigned int l = 0;
1a6509d9
HX		 2695 if (x->aead)
2696 l += nla_total_size(aead_len(x->aead));
4447bb33
MW		 2697 if (x->aalg) {
2698 l += nla_total_size(sizeof(struct xfrm_algo) +
2699 (x->aalg->alg_key_len + 7) / 8);
2700 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2701 }
26b15dad 2702 if (x->ealg)
0f99be0d 2703 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2704 if (x->calg)
7deb2264 2705 l += nla_total_size(sizeof(*x->calg));
26b15dad 2706 if (x->encap)
7deb2264 2707 l += nla_total_size(sizeof(*x->encap));
35d2856b
MW		 2708 if (x->tfcpad)
2709 l += nla_total_size(sizeof(x->tfcpad));
d8647b79
SK		 2710 if (x->replay_esn)
2711 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
f293a5e3 2712 else
2713 l += nla_total_size(sizeof(struct xfrm_replay_state));
68325d3b
HX		 2714 if (x->security)
2715 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2716 x->security->ctx_len);
2717 if (x->coaddr)
2718 l += nla_total_size(sizeof(*x->coaddr));
a947b0a9
ND		 2719 if (x->props.extra_flags)
2720 l += nla_total_size(sizeof(x->props.extra_flags));
d77e38e6
SK		 2721 if (x->xso.dev)
2722 l += nla_total_size(sizeof(x->xso));
077fbac4
LC		 2723 if (x->props.output_mark)
2724 l += nla_total_size(sizeof(x->props.output_mark));
68325d3b 2725
d26f3984 2726 /* Must count x->lastused as it may become non-zero behind our back. */
de95c4a4 2727 l += nla_total_size_64bit(sizeof(u64));
26b15dad
JHS		 2728
2729 return l;
2730}
2731
214e005b 2732static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
26b15dad 2733{
fc34acd3 2734 struct net *net = xs_net(x);
26b15dad 2735 struct xfrm_usersa_info *p;
0603eac0 2736 struct xfrm_usersa_id *id;
26b15dad
JHS		 2737 struct nlmsghdr *nlh;
2738 struct sk_buff *skb;
a1b831f2
AD		 2739 unsigned int len = xfrm_sa_len(x);
2740 unsigned int headlen;
2741 int err;
0603eac0
HX		 2742
2743 headlen = sizeof(*p);
2744 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2745 len += nla_total_size(headlen);
0603eac0 2746 headlen = sizeof(*id);
6f26b61e 2747 len += nla_total_size(sizeof(struct xfrm_mark));
0603eac0 2748 }
7deb2264 2749 len += NLMSG_ALIGN(headlen);
26b15dad 2750
7deb2264 2751 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2752 if (skb == NULL)
2753 return -ENOMEM;
26b15dad 2754
15e47304 2755 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 2756 err = -EMSGSIZE;
79b8b7f4 2757 if (nlh == NULL)
1d1e34dd 2758 goto out_free_skb;
26b15dad 2759
7b67c857 2760 p = nlmsg_data(nlh);
0603eac0 2761 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2762 struct nlattr *attr;
2763
7b67c857 2764 id = nlmsg_data(nlh);
50329c8a 2765 memset(id, 0, sizeof(*id));
0603eac0
HX		 2766 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2767 id->spi = x->id.spi;
2768 id->family = x->props.family;
2769 id->proto = x->id.proto;
2770
c0144bea 2771 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
1d1e34dd 2772 err = -EMSGSIZE;
c0144bea 2773 if (attr == NULL)
1d1e34dd 2774 goto out_free_skb;
c0144bea
TG		 2775
2776 p = nla_data(attr);
0603eac0 2777 }
1d1e34dd
DM		 2778 err = copy_to_user_state_extra(x, p, skb);
2779 if (err)
2780 goto out_free_skb;
26b15dad 2781
9825069d 2782 nlmsg_end(skb, nlh);
26b15dad 2783
21ee543e 2784 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
26b15dad 2785
1d1e34dd 2786out_free_skb:
26b15dad 2787 kfree_skb(skb);
1d1e34dd 2788 return err;
26b15dad
JHS		 2789}
2790
214e005b 2791static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
26b15dad
JHS		 2792{
2793
2794 switch (c->event) {
f60f6b8f 2795 case XFRM_MSG_EXPIRE:
26b15dad 2796 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2797 case XFRM_MSG_NEWAE:
2798 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2799 case XFRM_MSG_DELSA:
2800 case XFRM_MSG_UPDSA:
2801 case XFRM_MSG_NEWSA:
26b15dad 2802 return xfrm_notify_sa(x, c);
f60f6b8f 2803 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2804 return xfrm_notify_sa_flush(c);
2805 default:
62db5cfd 2806 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2807 c->event);
2808 break;
26b15dad
JHS		 2809 }
2810
2811 return 0;
2812
2813}
2814
a1b831f2
AD		 2815static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state *x,
2816 struct xfrm_policy *xp)
7deb2264
TG		 2817{
2818 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2819 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
6f26b61e 2820 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2821 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2822 + userpolicy_type_attrsize();
2823}
2824
1da177e4 2825static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
65e0736b 2826 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
1da177e4 2827{
1d1e34dd 2828 __u32 seq = xfrm_get_acqseq();
1da177e4
LT		 2829 struct xfrm_user_acquire *ua;
2830 struct nlmsghdr *nlh;
1d1e34dd 2831 int err;
1da177e4 2832
79b8b7f4
TG		 2833 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2834 if (nlh == NULL)
2835 return -EMSGSIZE;
1da177e4 2836
7b67c857 2837 ua = nlmsg_data(nlh);
1da177e4
LT		 2838 memcpy(&ua->id, &x->id, sizeof(ua->id));
2839 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2840 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
65e0736b 2841 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
1da177e4
LT		 2842 ua->aalgos = xt->aalgos;
2843 ua->ealgos = xt->ealgos;
2844 ua->calgos = xt->calgos;
2845 ua->seq = x->km.seq = seq;
2846
1d1e34dd
DM		 2847 err = copy_to_user_tmpl(xp, skb);
2848 if (!err)
2849 err = copy_to_user_state_sec_ctx(x, skb);
2850 if (!err)
2851 err = copy_to_user_policy_type(xp->type, skb);
2852 if (!err)
2853 err = xfrm_mark_put(skb, &xp->mark);
2854 if (err) {
2855 nlmsg_cancel(skb, nlh);
2856 return err;
2857 }
1da177e4 2858
053c095a
JB		 2859 nlmsg_end(skb, nlh);
2860 return 0;
1da177e4
LT		 2861}
2862
2863static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
65e0736b 2864 struct xfrm_policy *xp)
1da177e4 2865{
a6483b79 2866 struct net *net = xs_net(x);
1da177e4 2867 struct sk_buff *skb;
2fc5f83b 2868 int err;
1da177e4 2869
7deb2264 2870 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2871 if (skb == NULL)
2872 return -ENOMEM;
2873
2fc5f83b
GS		 2874 err = build_acquire(skb, x, xt, xp);
2875 BUG_ON(err < 0);
1da177e4 2876
21ee543e 2877 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
1da177e4
LT		 2878}
2879
2880/* User gives us xfrm_user_policy_info followed by an array of 0
2881 * or more templates.
2882 */
cb969f07 2883static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2884 u8 *data, int len, int *dir)
2885{
fc34acd3 2886 struct net *net = sock_net(sk);
1da177e4
LT		 2887 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2888 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2889 struct xfrm_policy *xp;
2890 int nr;
2891
cb969f07 2892 switch (sk->sk_family) {
1da177e4
LT		 2893 case AF_INET:
2894 if (opt != IP_XFRM_POLICY) {
2895 *dir = -EOPNOTSUPP;
2896 return NULL;
2897 }
2898 break;
dfd56b8b 2899#if IS_ENABLED(CONFIG_IPV6)
1da177e4
LT		 2900 case AF_INET6:
2901 if (opt != IPV6_XFRM_POLICY) {
2902 *dir = -EOPNOTSUPP;
2903 return NULL;
2904 }
2905 break;
2906#endif
2907 default:
2908 *dir = -EINVAL;
2909 return NULL;
2910 }
2911
2912 *dir = -EINVAL;
2913
2914 if (len < sizeof(*p) ||
2915 verify_newpolicy_info(p))
2916 return NULL;
2917
2918 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2919 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2920 return NULL;
2921
a4f1bac6
HX		 2922 if (p->dir > XFRM_POLICY_OUT)
2923 return NULL;
2924
2f09a4d5 2925 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
1da177e4
LT		 2926 if (xp == NULL) {
2927 *dir = -ENOBUFS;
2928 return NULL;
2929 }
2930
2931 copy_from_user_policy(xp, p);
f7b6983f 2932 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2933 copy_templates(xp, ut, nr);
2934
2935 *dir = p->dir;
2936
2937 return xp;
2938}
2939
a1b831f2 2940static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy *xp)
7deb2264
TG		 2941{
2942 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2943 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2944 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
295fae56 2945 + nla_total_size(sizeof(struct xfrm_mark))
7deb2264
TG		 2946 + userpolicy_type_attrsize();
2947}
2948
1da177e4 2949static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
214e005b 2950 int dir, const struct km_event *c)
1da177e4
LT		 2951{
2952 struct xfrm_user_polexpire *upe;
d51d081d 2953 int hard = c->data.hard;
1d1e34dd
DM		 2954 struct nlmsghdr *nlh;
2955 int err;
1da177e4 2956
15e47304 2957 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
79b8b7f4
TG		 2958 if (nlh == NULL)
2959 return -EMSGSIZE;
1da177e4 2960
7b67c857 2961 upe = nlmsg_data(nlh);
1da177e4 2962 copy_to_user_policy(xp, &upe->pol, dir);
1d1e34dd
DM		 2963 err = copy_to_user_tmpl(xp, skb);
2964 if (!err)
2965 err = copy_to_user_sec_ctx(xp, skb);
2966 if (!err)
2967 err = copy_to_user_policy_type(xp->type, skb);
2968 if (!err)
2969 err = xfrm_mark_put(skb, &xp->mark);
2970 if (err) {
2971 nlmsg_cancel(skb, nlh);
2972 return err;
2973 }
1da177e4
LT		 2974 upe->hard = !!hard;
2975
053c095a
JB		 2976 nlmsg_end(skb, nlh);
2977 return 0;
1da177e4
LT		 2978}
2979
214e005b 2980static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
1da177e4 2981{
fc34acd3 2982 struct net *net = xp_net(xp);
1da177e4 2983 struct sk_buff *skb;
2fc5f83b 2984 int err;
1da177e4 2985
7deb2264 2986 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2987 if (skb == NULL)
2988 return -ENOMEM;
2989
2fc5f83b
GS		 2990 err = build_polexpire(skb, xp, dir, c);
2991 BUG_ON(err < 0);
1da177e4 2992
21ee543e 2993 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
1da177e4
LT		 2994}
2995
214e005b 2996static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad 2997{
a1b831f2 2998 unsigned int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
fc34acd3 2999 struct net *net = xp_net(xp);
26b15dad 3000 struct xfrm_userpolicy_info *p;
0603eac0 3001 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 3002 struct nlmsghdr *nlh;
3003 struct sk_buff *skb;
a1b831f2
AD		 3004 unsigned int headlen;
3005 int err;
0603eac0
HX		 3006
3007 headlen = sizeof(*p);
3008 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 3009 len += nla_total_size(headlen);
0603eac0
HX		 3010 headlen = sizeof(*id);
3011 }
cfbfd45a 3012 len += userpolicy_type_attrsize();
295fae56 3013 len += nla_total_size(sizeof(struct xfrm_mark));
7deb2264 3014 len += NLMSG_ALIGN(headlen);
26b15dad 3015
7deb2264 3016 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 3017 if (skb == NULL)
3018 return -ENOMEM;
26b15dad 3019
15e47304 3020 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
1d1e34dd 3021 err = -EMSGSIZE;
79b8b7f4 3022 if (nlh == NULL)
1d1e34dd 3023 goto out_free_skb;
26b15dad 3024
7b67c857 3025 p = nlmsg_data(nlh);
0603eac0 3026 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 3027 struct nlattr *attr;
3028
7b67c857 3029 id = nlmsg_data(nlh);
0603eac0
HX		 3030 memset(id, 0, sizeof(*id));
3031 id->dir = dir;
3032 if (c->data.byid)
3033 id->index = xp->index;
3034 else
3035 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
3036
c0144bea 3037 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
1d1e34dd 3038 err = -EMSGSIZE;
c0144bea 3039 if (attr == NULL)
1d1e34dd 3040 goto out_free_skb;
c0144bea
TG		 3041
3042 p = nla_data(attr);
0603eac0 3043 }
26b15dad 3044
26b15dad 3045 copy_to_user_policy(xp, p, dir);
1d1e34dd
DM		 3046 err = copy_to_user_tmpl(xp, skb);
3047 if (!err)
3048 err = copy_to_user_policy_type(xp->type, skb);
3049 if (!err)
3050 err = xfrm_mark_put(skb, &xp->mark);
3051 if (err)
3052 goto out_free_skb;
295fae56 3053
9825069d 3054 nlmsg_end(skb, nlh);
26b15dad 3055
21ee543e 3056 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3057
1d1e34dd 3058out_free_skb:
26b15dad 3059 kfree_skb(skb);
1d1e34dd 3060 return err;
26b15dad
JHS		 3061}
3062
214e005b 3063static int xfrm_notify_policy_flush(const struct km_event *c)
26b15dad 3064{
7067802e 3065 struct net *net = c->net;
26b15dad
JHS		 3066 struct nlmsghdr *nlh;
3067 struct sk_buff *skb;
1d1e34dd 3068 int err;
26b15dad 3069
7deb2264 3070 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 3071 if (skb == NULL)
3072 return -ENOMEM;
26b15dad 3073
15e47304 3074 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
1d1e34dd 3075 err = -EMSGSIZE;
79b8b7f4 3076 if (nlh == NULL)
1d1e34dd
DM		 3077 goto out_free_skb;
3078 err = copy_to_user_policy_type(c->data.type, skb);
3079 if (err)
3080 goto out_free_skb;
26b15dad 3081
9825069d 3082 nlmsg_end(skb, nlh);
26b15dad 3083
21ee543e 3084 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
26b15dad 3085
1d1e34dd 3086out_free_skb:
26b15dad 3087 kfree_skb(skb);
1d1e34dd 3088 return err;
26b15dad
JHS		 3089}
3090
214e005b 3091static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
26b15dad
JHS		 3092{
3093
3094 switch (c->event) {
f60f6b8f
HX		 3095 case XFRM_MSG_NEWPOLICY:
3096 case XFRM_MSG_UPDPOLICY:
3097 case XFRM_MSG_DELPOLICY:
26b15dad 3098 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 3099 case XFRM_MSG_FLUSHPOLICY:
26b15dad 3100 return xfrm_notify_policy_flush(c);
f60f6b8f 3101 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 3102 return xfrm_exp_policy_notify(xp, dir, c);
3103 default:
62db5cfd 3104 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
3105 c->event);
26b15dad
JHS		 3106 }
3107
3108 return 0;
3109
3110}
3111
a1b831f2 3112static inline unsigned int xfrm_report_msgsize(void)
7deb2264
TG		 3113{
3114 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3115}
3116
97a64b45
MN		 3117static int build_report(struct sk_buff *skb, u8 proto,
3118 struct xfrm_selector *sel, xfrm_address_t *addr)
3119{
3120 struct xfrm_user_report *ur;
3121 struct nlmsghdr *nlh;
97a64b45 3122
79b8b7f4
TG		 3123 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3124 if (nlh == NULL)
3125 return -EMSGSIZE;
97a64b45 3126
7b67c857 3127 ur = nlmsg_data(nlh);
97a64b45
MN		 3128 ur->proto = proto;
3129 memcpy(&ur->sel, sel, sizeof(ur->sel));
3130
1d1e34dd
DM		 3131 if (addr) {
3132 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3133 if (err) {
3134 nlmsg_cancel(skb, nlh);
3135 return err;
3136 }
3137 }
053c095a
JB		 3138 nlmsg_end(skb, nlh);
3139 return 0;
97a64b45
MN		 3140}
3141
db983c11
AD		 3142static int xfrm_send_report(struct net *net, u8 proto,
3143 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 3144{
3145 struct sk_buff *skb;
2fc5f83b 3146 int err;
97a64b45 3147
7deb2264 3148 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 3149 if (skb == NULL)
3150 return -ENOMEM;
3151
2fc5f83b
GS		 3152 err = build_report(skb, proto, sel, addr);
3153 BUG_ON(err < 0);
97a64b45 3154
21ee543e 3155 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
97a64b45
MN		 3156}
3157
a1b831f2 3158static inline unsigned int xfrm_mapping_msgsize(void)
3a2dfbe8
MW		 3159{
3160 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3161}
3162
3163static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3164 xfrm_address_t *new_saddr, __be16 new_sport)
3165{
3166 struct xfrm_user_mapping *um;
3167 struct nlmsghdr *nlh;
3168
3169 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3170 if (nlh == NULL)
3171 return -EMSGSIZE;
3172
3173 um = nlmsg_data(nlh);
3174
3175 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3176 um->id.spi = x->id.spi;
3177 um->id.family = x->props.family;
3178 um->id.proto = x->id.proto;
3179 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3180 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3181 um->new_sport = new_sport;
3182 um->old_sport = x->encap->encap_sport;
3183 um->reqid = x->props.reqid;
3184
053c095a
JB		 3185 nlmsg_end(skb, nlh);
3186 return 0;
3a2dfbe8
MW		 3187}
3188
3189static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3190 __be16 sport)
3191{
a6483b79 3192 struct net *net = xs_net(x);
3a2dfbe8 3193 struct sk_buff *skb;
2fc5f83b 3194 int err;
3a2dfbe8
MW		 3195
3196 if (x->id.proto != IPPROTO_ESP)
3197 return -EINVAL;
3198
3199 if (!x->encap)
3200 return -EINVAL;
3201
3202 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3203 if (skb == NULL)
3204 return -ENOMEM;
3205
2fc5f83b
GS		 3206 err = build_mapping(skb, x, ipaddr, sport);
3207 BUG_ON(err < 0);
3a2dfbe8 3208
21ee543e 3209 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
3a2dfbe8
MW		 3210}
3211
0f24558e
HG		 3212static bool xfrm_is_alive(const struct km_event *c)
3213{
3214 return (bool)xfrm_acquire_is_on(c->net);
3215}
3216
1da177e4 3217static struct xfrm_mgr netlink_mgr = {
1da177e4
LT		 3218 .notify = xfrm_send_state_notify,
3219 .acquire = xfrm_send_acquire,
3220 .compile_policy = xfrm_compile_policy,
3221 .notify_policy = xfrm_send_policy_notify,
97a64b45 3222 .report = xfrm_send_report,
5c79de6e 3223 .migrate = xfrm_send_migrate,
3a2dfbe8 3224 .new_mapping = xfrm_send_mapping,
0f24558e 3225 .is_alive = xfrm_is_alive,
1da177e4
LT		 3226};
3227
a6483b79 3228static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 3229{
be33690d 3230 struct sock *nlsk;
a31f2d17
PNA		 3231 struct netlink_kernel_cfg cfg = {
3232 .groups = XFRMNLGRP_MAX,
3233 .input = xfrm_netlink_rcv,
3234 };
be33690d 3235
9f00d977 3236 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
be33690d 3237 if (nlsk == NULL)
1da177e4 3238 return -ENOMEM;
d79d792e 3239 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
cf778b00 3240 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 3241 return 0;
3242}
3243
d79d792e 3244static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
1da177e4 3245{
d79d792e
EB		 3246 struct net *net;
3247 list_for_each_entry(net, net_exit_list, exit_list)
a9b3cd7f 3248 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
d79d792e
EB		 3249 synchronize_net();
3250 list_for_each_entry(net, net_exit_list, exit_list)
3251 netlink_kernel_release(net->xfrm.nlsk_stash);
1da177e4
LT		 3252}
3253
a6483b79 3254static struct pernet_operations xfrm_user_net_ops = {
d79d792e
EB		 3255 .init = xfrm_user_net_init,
3256 .exit_batch = xfrm_user_net_exit,
a6483b79
AD		 3257};
3258
3259static int __init xfrm_user_init(void)
3260{
3261 int rv;
3262
3263 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3264
3265 rv = register_pernet_subsys(&xfrm_user_net_ops);
3266 if (rv < 0)
3267 return rv;
3268 rv = xfrm_register_km(&netlink_mgr);
3269 if (rv < 0)
3270 unregister_pernet_subsys(&xfrm_user_net_ops);
3271 return rv;
3272}
3273
3274static void __exit xfrm_user_exit(void)
3275{
3276 xfrm_unregister_km(&netlink_mgr);
3277 unregister_pernet_subsys(&xfrm_user_net_ops);
3278}
3279
1da177e4
LT		 3280module_init(xfrm_user_init);
3281module_exit(xfrm_user_exit);
3282MODULE_LICENSE("GPL");
4fdb3bb7 3283MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 3284
ubuntu-bionic-kernel mirror