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xfrm: For 32/64 compatability wrt. xfrm_usersa_info
[deliverable/linux.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
1da177e4 29#include <asm/uaccess.h>
e23c7194
MN		 30#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
31#include <linux/in6.h>
32#endif
1da177e4 33
1a6509d9
HX		 34static inline int aead_len(struct xfrm_algo_aead *alg)
35{
36 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
37}
38
5424f32e 39static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 40{
5424f32e 41 struct nlattr *rt = attrs[type];
1da177e4
LT		 42 struct xfrm_algo *algp;
43
44 if (!rt)
45 return 0;
46
5424f32e 47 algp = nla_data(rt);
0f99be0d 48 if (nla_len(rt) < xfrm_alg_len(algp))
31c26852
HX		 49 return -EINVAL;
50
1da177e4
LT		 51 switch (type) {
52 case XFRMA_ALG_AUTH:
1da177e4 53 case XFRMA_ALG_CRYPT:
1da177e4 54 case XFRMA_ALG_COMP:
1da177e4
LT		 55 break;
56
57 default:
58 return -EINVAL;
3ff50b79 59 }
1da177e4
LT		 60
61 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
62 return 0;
63}
64
1a6509d9
HX		 65static int verify_aead(struct nlattr **attrs)
66{
67 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
68 struct xfrm_algo_aead *algp;
69
70 if (!rt)
71 return 0;
72
73 algp = nla_data(rt);
74 if (nla_len(rt) < aead_len(algp))
75 return -EINVAL;
76
77 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
78 return 0;
79}
80
5424f32e 81static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 82 xfrm_address_t **addrp)
83{
5424f32e 84 struct nlattr *rt = attrs[type];
eb2971b6 85
cf5cb79f 86 if (rt && addrp)
5424f32e 87 *addrp = nla_data(rt);
eb2971b6 88}
df71837d 89
5424f32e 90static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 91{
5424f32e 92 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 93 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 94
95 if (!rt)
96 return 0;
97
5424f32e 98 uctx = nla_data(rt);
cf5cb79f 99 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 100 return -EINVAL;
101
102 return 0;
103}
104
105
1da177e4 106static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 107 struct nlattr **attrs)
1da177e4
LT		 108{
109 int err;
110
111 err = -EINVAL;
112 switch (p->family) {
113 case AF_INET:
114 break;
115
116 case AF_INET6:
117#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
118 break;
119#else
120 err = -EAFNOSUPPORT;
121 goto out;
122#endif
123
124 default:
125 goto out;
3ff50b79 126 }
1da177e4
LT		 127
128 err = -EINVAL;
129 switch (p->id.proto) {
130 case IPPROTO_AH:
35a7aa08 131 if (!attrs[XFRMA_ALG_AUTH] ||
1a6509d9 132 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 133 attrs[XFRMA_ALG_CRYPT] ||
134 attrs[XFRMA_ALG_COMP])
1da177e4
LT		 135 goto out;
136 break;
137
138 case IPPROTO_ESP:
1a6509d9
HX		 139 if (attrs[XFRMA_ALG_COMP])
140 goto out;
141 if (!attrs[XFRMA_ALG_AUTH] &&
142 !attrs[XFRMA_ALG_CRYPT] &&
143 !attrs[XFRMA_ALG_AEAD])
144 goto out;
145 if ((attrs[XFRMA_ALG_AUTH] ||
146 attrs[XFRMA_ALG_CRYPT]) &&
147 attrs[XFRMA_ALG_AEAD])
1da177e4
LT		 148 goto out;
149 break;
150
151 case IPPROTO_COMP:
35a7aa08 152 if (!attrs[XFRMA_ALG_COMP] ||
1a6509d9 153 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 154 attrs[XFRMA_ALG_AUTH] ||
155 attrs[XFRMA_ALG_CRYPT])
1da177e4
LT		 156 goto out;
157 break;
158
e23c7194
MN		 159#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
160 case IPPROTO_DSTOPTS:
161 case IPPROTO_ROUTING:
35a7aa08
TG		 162 if (attrs[XFRMA_ALG_COMP] ||
163 attrs[XFRMA_ALG_AUTH] ||
1a6509d9 164 attrs[XFRMA_ALG_AEAD] ||
35a7aa08
TG		 165 attrs[XFRMA_ALG_CRYPT] ||
166 attrs[XFRMA_ENCAP] ||
167 attrs[XFRMA_SEC_CTX] ||
168 !attrs[XFRMA_COADDR])
e23c7194
MN		 169 goto out;
170 break;
171#endif
172
1da177e4
LT		 173 default:
174 goto out;
3ff50b79 175 }
1da177e4 176
1a6509d9
HX		 177 if ((err = verify_aead(attrs)))
178 goto out;
35a7aa08 179 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 180 goto out;
35a7aa08 181 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 182 goto out;
35a7aa08 183 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 184 goto out;
35a7aa08 185 if ((err = verify_sec_ctx_len(attrs)))
df71837d 186 goto out;
1da177e4
LT		 187
188 err = -EINVAL;
189 switch (p->mode) {
7e49e6de
MN		 190 case XFRM_MODE_TRANSPORT:
191 case XFRM_MODE_TUNNEL:
060f02a3 192 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 193 case XFRM_MODE_BEET:
1da177e4
LT		 194 break;
195
196 default:
197 goto out;
3ff50b79 198 }
1da177e4
LT		 199
200 err = 0;
201
202out:
203 return err;
204}
205
206static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
207 struct xfrm_algo_desc *(*get_byname)(char *, int),
5424f32e 208 struct nlattr *rta)
1da177e4 209{
1da177e4
LT		 210 struct xfrm_algo *p, *ualg;
211 struct xfrm_algo_desc *algo;
212
213 if (!rta)
214 return 0;
215
5424f32e 216 ualg = nla_data(rta);
1da177e4
LT		 217
218 algo = get_byname(ualg->alg_name, 1);
219 if (!algo)
220 return -ENOSYS;
221 *props = algo->desc.sadb_alg_id;
222
0f99be0d 223 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 224 if (!p)
225 return -ENOMEM;
226
04ff1260 227 strcpy(p->alg_name, algo->name);
1da177e4
LT		 228 *algpp = p;
229 return 0;
230}
231
1a6509d9
HX		 232static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
233 struct nlattr *rta)
234{
235 struct xfrm_algo_aead *p, *ualg;
236 struct xfrm_algo_desc *algo;
237
238 if (!rta)
239 return 0;
240
241 ualg = nla_data(rta);
242
243 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
244 if (!algo)
245 return -ENOSYS;
246 *props = algo->desc.sadb_alg_id;
247
248 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
249 if (!p)
250 return -ENOMEM;
251
252 strcpy(p->alg_name, algo->name);
253 *algpp = p;
254 return 0;
255}
256
661697f7 257static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 258{
df71837d
TJ		 259 int len = 0;
260
261 if (xfrm_ctx) {
262 len += sizeof(struct xfrm_user_sec_ctx);
263 len += xfrm_ctx->ctx_len;
264 }
265 return len;
266}
267
1da177e4
LT		 268static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
269{
270 memcpy(&x->id, &p->id, sizeof(x->id));
271 memcpy(&x->sel, &p->sel, sizeof(x->sel));
272 memcpy(&x->lft, &p->lft, sizeof(x->lft));
273 x->props.mode = p->mode;
274 x->props.replay_window = p->replay_window;
275 x->props.reqid = p->reqid;
276 x->props.family = p->family;
54489c14 277 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 278 x->props.flags = p->flags;
196b0036 279
ccf9b3b8 280 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
196b0036 281 x->sel.family = p->family;
1da177e4
LT		 282}
283
d51d081d
JHS		 284/*
285 * someday when pfkey also has support, we could have the code
286 * somehow made shareable and move it to xfrm_state.c - JHS
287 *
288*/
5424f32e 289static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
d51d081d 290{
5424f32e
TG		 291 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
292 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
293 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
294 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d
JHS		 295
296 if (rp) {
297 struct xfrm_replay_state *replay;
5424f32e 298 replay = nla_data(rp);
d51d081d
JHS		 299 memcpy(&x->replay, replay, sizeof(*replay));
300 memcpy(&x->preplay, replay, sizeof(*replay));
301 }
302
303 if (lt) {
304 struct xfrm_lifetime_cur *ltime;
5424f32e 305 ltime = nla_data(lt);
d51d081d
JHS		 306 x->curlft.bytes = ltime->bytes;
307 x->curlft.packets = ltime->packets;
308 x->curlft.add_time = ltime->add_time;
309 x->curlft.use_time = ltime->use_time;
310 }
311
cf5cb79f 312 if (et)
5424f32e 313 x->replay_maxage = nla_get_u32(et);
d51d081d 314
cf5cb79f 315 if (rt)
5424f32e 316 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 317}
318
fc34acd3
AD		 319static struct xfrm_state *xfrm_state_construct(struct net *net,
320 struct xfrm_usersa_info *p,
5424f32e 321 struct nlattr **attrs,
1da177e4
LT		 322 int *errp)
323{
fc34acd3 324 struct xfrm_state *x = xfrm_state_alloc(net);
1da177e4
LT		 325 int err = -ENOMEM;
326
327 if (!x)
328 goto error_no_put;
329
330 copy_from_user_state(x, p);
331
1a6509d9
HX		 332 if ((err = attach_aead(&x->aead, &x->props.ealgo,
333 attrs[XFRMA_ALG_AEAD])))
334 goto error;
1da177e4
LT		 335 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
336 xfrm_aalg_get_byname,
35a7aa08 337 attrs[XFRMA_ALG_AUTH])))
1da177e4
LT		 338 goto error;
339 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
340 xfrm_ealg_get_byname,
35a7aa08 341 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 342 goto error;
343 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
344 xfrm_calg_get_byname,
35a7aa08 345 attrs[XFRMA_ALG_COMP])))
1da177e4 346 goto error;
fd21150a
TG		 347
348 if (attrs[XFRMA_ENCAP]) {
349 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
350 sizeof(*x->encap), GFP_KERNEL);
351 if (x->encap == NULL)
352 goto error;
353 }
354
355 if (attrs[XFRMA_COADDR]) {
356 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
357 sizeof(*x->coaddr), GFP_KERNEL);
358 if (x->coaddr == NULL)
359 goto error;
360 }
361
72cb6962 362 err = xfrm_init_state(x);
1da177e4
LT		 363 if (err)
364 goto error;
365
fd21150a
TG		 366 if (attrs[XFRMA_SEC_CTX] &&
367 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 368 goto error;
369
1da177e4 370 x->km.seq = p->seq;
b27aeadb 371 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
d51d081d 372 /* sysctl_xfrm_aevent_etime is in 100ms units */
b27aeadb 373 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
d51d081d
JHS		 374 x->preplay.bitmap = 0;
375 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
376 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
377
378 /* override default values from above */
379
5424f32e 380 xfrm_update_ae_params(x, attrs);
1da177e4
LT		 381
382 return x;
383
384error:
385 x->km.state = XFRM_STATE_DEAD;
386 xfrm_state_put(x);
387error_no_put:
388 *errp = err;
389 return NULL;
390}
391
22e70050 392static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 393 struct nlattr **attrs)
1da177e4 394{
fc34acd3 395 struct net *net = sock_net(skb->sk);
7b67c857 396 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 397 struct xfrm_state *x;
398 int err;
26b15dad 399 struct km_event c;
2532386f
EP		 400 uid_t loginuid = NETLINK_CB(skb).loginuid;
401 u32 sessionid = NETLINK_CB(skb).sessionid;
402 u32 sid = NETLINK_CB(skb).sid;
1da177e4 403
35a7aa08 404 err = verify_newsa_info(p, attrs);
1da177e4
LT		 405 if (err)
406 return err;
407
fc34acd3 408 x = xfrm_state_construct(net, p, attrs, &err);
1da177e4
LT		 409 if (!x)
410 return err;
411
26b15dad 412 xfrm_state_hold(x);
1da177e4
LT		 413 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
414 err = xfrm_state_add(x);
415 else
416 err = xfrm_state_update(x);
417
2532386f 418 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 419
1da177e4
LT		 420 if (err < 0) {
421 x->km.state = XFRM_STATE_DEAD;
21380b81 422 __xfrm_state_put(x);
7d6dfe1f 423 goto out;
1da177e4
LT		 424 }
425
26b15dad
JHS		 426 c.seq = nlh->nlmsg_seq;
427 c.pid = nlh->nlmsg_pid;
f60f6b8f 428 c.event = nlh->nlmsg_type;
26b15dad
JHS		 429
430 km_state_notify(x, &c);
7d6dfe1f 431out:
26b15dad 432 xfrm_state_put(x);
1da177e4
LT		 433 return err;
434}
435
fc34acd3
AD		 436static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
437 struct xfrm_usersa_id *p,
5424f32e 438 struct nlattr **attrs,
eb2971b6
MN		 439 int *errp)
440{
441 struct xfrm_state *x = NULL;
442 int err;
443
444 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
445 err = -ESRCH;
fc34acd3 446 x = xfrm_state_lookup(net, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 447 } else {
448 xfrm_address_t *saddr = NULL;
449
35a7aa08 450 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 451 if (!saddr) {
452 err = -EINVAL;
453 goto out;
454 }
455
9abbffee 456 err = -ESRCH;
fc34acd3 457 x = xfrm_state_lookup_byaddr(net, &p->daddr, saddr,
221df1ed 458 p->proto, p->family);
eb2971b6
MN		 459 }
460
461 out:
462 if (!x && errp)
463 *errp = err;
464 return x;
465}
466
22e70050 467static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 468 struct nlattr **attrs)
1da177e4 469{
fc34acd3 470 struct net *net = sock_net(skb->sk);
1da177e4 471 struct xfrm_state *x;
eb2971b6 472 int err = -ESRCH;
26b15dad 473 struct km_event c;
7b67c857 474 struct xfrm_usersa_id *p = nlmsg_data(nlh);
2532386f
EP		 475 uid_t loginuid = NETLINK_CB(skb).loginuid;
476 u32 sessionid = NETLINK_CB(skb).sessionid;
477 u32 sid = NETLINK_CB(skb).sid;
1da177e4 478
fc34acd3 479 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4 480 if (x == NULL)
eb2971b6 481 return err;
1da177e4 482
6f68dc37 483 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 484 goto out;
485
1da177e4 486 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 487 err = -EPERM;
488 goto out;
1da177e4
LT		 489 }
490
26b15dad 491 err = xfrm_state_delete(x);
161a09e7 492
c8c05a8e
CZ		 493 if (err < 0)
494 goto out;
26b15dad
JHS		 495
496 c.seq = nlh->nlmsg_seq;
497 c.pid = nlh->nlmsg_pid;
f60f6b8f 498 c.event = nlh->nlmsg_type;
26b15dad 499 km_state_notify(x, &c);
1da177e4 500
c8c05a8e 501out:
2532386f 502 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
c8c05a8e 503 xfrm_state_put(x);
26b15dad 504 return err;
1da177e4
LT		 505}
506
507static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
508{
509 memcpy(&p->id, &x->id, sizeof(p->id));
510 memcpy(&p->sel, &x->sel, sizeof(p->sel));
511 memcpy(&p->lft, &x->lft, sizeof(p->lft));
512 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
513 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 514 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 515 p->mode = x->props.mode;
516 p->replay_window = x->props.replay_window;
517 p->reqid = x->props.reqid;
518 p->family = x->props.family;
519 p->flags = x->props.flags;
520 p->seq = x->km.seq;
521}
522
523struct xfrm_dump_info {
524 struct sk_buff *in_skb;
525 struct sk_buff *out_skb;
526 u32 nlmsg_seq;
527 u16 nlmsg_flags;
1da177e4
LT		 528};
529
c0144bea
TG		 530static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
531{
c0144bea
TG		 532 struct xfrm_user_sec_ctx *uctx;
533 struct nlattr *attr;
68325d3b 534 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 535
536 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
537 if (attr == NULL)
538 return -EMSGSIZE;
539
540 uctx = nla_data(attr);
541 uctx->exttype = XFRMA_SEC_CTX;
542 uctx->len = ctx_size;
543 uctx->ctx_doi = s->ctx_doi;
544 uctx->ctx_alg = s->ctx_alg;
545 uctx->ctx_len = s->ctx_len;
546 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
547
548 return 0;
549}
550
68325d3b
HX		 551/* Don't change this without updating xfrm_sa_len! */
552static int copy_to_user_state_extra(struct xfrm_state *x,
553 struct xfrm_usersa_info *p,
554 struct sk_buff *skb)
1da177e4 555{
1da177e4
LT		 556 copy_to_user_state(x, p);
557
050f009e
HX		 558 if (x->coaddr)
559 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
560
561 if (x->lastused)
562 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
050f009e 563
1a6509d9
HX		 564 if (x->aead)
565 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
1da177e4 566 if (x->aalg)
0f99be0d 567 NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg);
1da177e4 568 if (x->ealg)
0f99be0d 569 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
1da177e4 570 if (x->calg)
c0144bea 571 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1da177e4
LT		 572
573 if (x->encap)
c0144bea 574 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1da177e4 575
c0144bea
TG		 576 if (x->security && copy_sec_ctx(x->security, skb) < 0)
577 goto nla_put_failure;
060f02a3 578
68325d3b
HX		 579 return 0;
580
581nla_put_failure:
582 return -EMSGSIZE;
583}
584
585static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
586{
587 struct xfrm_dump_info *sp = ptr;
588 struct sk_buff *in_skb = sp->in_skb;
589 struct sk_buff *skb = sp->out_skb;
590 struct xfrm_usersa_info *p;
591 struct nlmsghdr *nlh;
592 int err;
593
68325d3b
HX		 594 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
595 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
596 if (nlh == NULL)
597 return -EMSGSIZE;
598
599 p = nlmsg_data(nlh);
600
601 err = copy_to_user_state_extra(x, p, skb);
602 if (err)
603 goto nla_put_failure;
604
9825069d 605 nlmsg_end(skb, nlh);
1da177e4
LT		 606 return 0;
607
c0144bea 608nla_put_failure:
9825069d 609 nlmsg_cancel(skb, nlh);
68325d3b 610 return err;
1da177e4
LT		 611}
612
4c563f76
TT		 613static int xfrm_dump_sa_done(struct netlink_callback *cb)
614{
615 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
616 xfrm_state_walk_done(walk);
617 return 0;
618}
619
1da177e4
LT		 620static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
621{
fc34acd3 622 struct net *net = sock_net(skb->sk);
4c563f76 623 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 624 struct xfrm_dump_info info;
625
4c563f76
TT		 626 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
627 sizeof(cb->args) - sizeof(cb->args[0]));
628
1da177e4
LT		 629 info.in_skb = cb->skb;
630 info.out_skb = skb;
631 info.nlmsg_seq = cb->nlh->nlmsg_seq;
632 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 633
634 if (!cb->args[0]) {
635 cb->args[0] = 1;
636 xfrm_state_walk_init(walk, 0);
637 }
638
fc34acd3 639 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
1da177e4
LT		 640
641 return skb->len;
642}
643
644static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
645 struct xfrm_state *x, u32 seq)
646{
647 struct xfrm_dump_info info;
648 struct sk_buff *skb;
649
7deb2264 650 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 651 if (!skb)
652 return ERR_PTR(-ENOMEM);
653
1da177e4
LT		 654 info.in_skb = in_skb;
655 info.out_skb = skb;
656 info.nlmsg_seq = seq;
657 info.nlmsg_flags = 0;
1da177e4
LT		 658
659 if (dump_one_state(x, 0, &info)) {
660 kfree_skb(skb);
661 return NULL;
662 }
663
664 return skb;
665}
666
7deb2264
TG		 667static inline size_t xfrm_spdinfo_msgsize(void)
668{
669 return NLMSG_ALIGN(4)
670 + nla_total_size(sizeof(struct xfrmu_spdinfo))
671 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
672}
673
ecfd6b18
JHS		 674static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
675{
5a6d3416
JHS		 676 struct xfrmk_spdinfo si;
677 struct xfrmu_spdinfo spc;
678 struct xfrmu_spdhinfo sph;
ecfd6b18
JHS		 679 struct nlmsghdr *nlh;
680 u32 *f;
681
682 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
683 if (nlh == NULL) /* shouldnt really happen ... */
684 return -EMSGSIZE;
685
686 f = nlmsg_data(nlh);
687 *f = flags;
688 xfrm_spd_getinfo(&si);
5a6d3416
JHS		 689 spc.incnt = si.incnt;
690 spc.outcnt = si.outcnt;
691 spc.fwdcnt = si.fwdcnt;
692 spc.inscnt = si.inscnt;
693 spc.outscnt = si.outscnt;
694 spc.fwdscnt = si.fwdscnt;
695 sph.spdhcnt = si.spdhcnt;
696 sph.spdhmcnt = si.spdhmcnt;
697
698 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
699 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
ecfd6b18
JHS		 700
701 return nlmsg_end(skb, nlh);
702
703nla_put_failure:
704 nlmsg_cancel(skb, nlh);
705 return -EMSGSIZE;
706}
707
708static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 709 struct nlattr **attrs)
ecfd6b18 710{
a6483b79 711 struct net *net = sock_net(skb->sk);
ecfd6b18 712 struct sk_buff *r_skb;
7b67c857 713 u32 *flags = nlmsg_data(nlh);
ecfd6b18
JHS		 714 u32 spid = NETLINK_CB(skb).pid;
715 u32 seq = nlh->nlmsg_seq;
ecfd6b18 716
7deb2264 717 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 718 if (r_skb == NULL)
719 return -ENOMEM;
720
721 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
722 BUG();
723
a6483b79 724 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
ecfd6b18
JHS		 725}
726
7deb2264
TG		 727static inline size_t xfrm_sadinfo_msgsize(void)
728{
729 return NLMSG_ALIGN(4)
730 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
731 + nla_total_size(4); /* XFRMA_SAD_CNT */
732}
733
28d8909b
JHS		 734static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
735{
af11e316
JHS		 736 struct xfrmk_sadinfo si;
737 struct xfrmu_sadhinfo sh;
28d8909b
JHS		 738 struct nlmsghdr *nlh;
739 u32 *f;
740
741 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
742 if (nlh == NULL) /* shouldnt really happen ... */
743 return -EMSGSIZE;
744
745 f = nlmsg_data(nlh);
746 *f = flags;
747 xfrm_sad_getinfo(&si);
748
af11e316
JHS		 749 sh.sadhmcnt = si.sadhmcnt;
750 sh.sadhcnt = si.sadhcnt;
751
752 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
753 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
28d8909b
JHS		 754
755 return nlmsg_end(skb, nlh);
756
757nla_put_failure:
758 nlmsg_cancel(skb, nlh);
759 return -EMSGSIZE;
760}
761
762static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 763 struct nlattr **attrs)
28d8909b 764{
a6483b79 765 struct net *net = sock_net(skb->sk);
28d8909b 766 struct sk_buff *r_skb;
7b67c857 767 u32 *flags = nlmsg_data(nlh);
28d8909b
JHS		 768 u32 spid = NETLINK_CB(skb).pid;
769 u32 seq = nlh->nlmsg_seq;
28d8909b 770
7deb2264 771 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 772 if (r_skb == NULL)
773 return -ENOMEM;
774
775 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
776 BUG();
777
a6483b79 778 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
28d8909b
JHS		 779}
780
22e70050 781static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 782 struct nlattr **attrs)
1da177e4 783{
fc34acd3 784 struct net *net = sock_net(skb->sk);
7b67c857 785 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 786 struct xfrm_state *x;
787 struct sk_buff *resp_skb;
eb2971b6 788 int err = -ESRCH;
1da177e4 789
fc34acd3 790 x = xfrm_user_state_lookup(net, p, attrs, &err);
1da177e4
LT		 791 if (x == NULL)
792 goto out_noput;
793
794 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
795 if (IS_ERR(resp_skb)) {
796 err = PTR_ERR(resp_skb);
797 } else {
a6483b79 798 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 799 }
800 xfrm_state_put(x);
801out_noput:
802 return err;
803}
804
805static int verify_userspi_info(struct xfrm_userspi_info *p)
806{
807 switch (p->info.id.proto) {
808 case IPPROTO_AH:
809 case IPPROTO_ESP:
810 break;
811
812 case IPPROTO_COMP:
813 /* IPCOMP spi is 16-bits. */
814 if (p->max >= 0x10000)
815 return -EINVAL;
816 break;
817
818 default:
819 return -EINVAL;
3ff50b79 820 }
1da177e4
LT		 821
822 if (p->min > p->max)
823 return -EINVAL;
824
825 return 0;
826}
827
22e70050 828static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 829 struct nlattr **attrs)
1da177e4 830{
fc34acd3 831 struct net *net = sock_net(skb->sk);
1da177e4
LT		 832 struct xfrm_state *x;
833 struct xfrm_userspi_info *p;
834 struct sk_buff *resp_skb;
835 xfrm_address_t *daddr;
836 int family;
837 int err;
838
7b67c857 839 p = nlmsg_data(nlh);
1da177e4
LT		 840 err = verify_userspi_info(p);
841 if (err)
842 goto out_noput;
843
844 family = p->info.family;
845 daddr = &p->info.id.daddr;
846
847 x = NULL;
848 if (p->info.seq) {
a6483b79 849 x = xfrm_find_acq_byseq(net, p->info.seq);
1da177e4
LT		 850 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
851 xfrm_state_put(x);
852 x = NULL;
853 }
854 }
855
856 if (!x)
a6483b79 857 x = xfrm_find_acq(net, p->info.mode, p->info.reqid,
1da177e4
LT		 858 p->info.id.proto, daddr,
859 &p->info.saddr, 1,
860 family);
861 err = -ENOENT;
862 if (x == NULL)
863 goto out_noput;
864
658b219e
HX		 865 err = xfrm_alloc_spi(x, p->min, p->max);
866 if (err)
867 goto out;
1da177e4 868
658b219e 869 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 870 if (IS_ERR(resp_skb)) {
871 err = PTR_ERR(resp_skb);
872 goto out;
873 }
874
a6483b79 875 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 876
877out:
878 xfrm_state_put(x);
879out_noput:
880 return err;
881}
882
b798a9ed 883static int verify_policy_dir(u8 dir)
1da177e4
LT		 884{
885 switch (dir) {
886 case XFRM_POLICY_IN:
887 case XFRM_POLICY_OUT:
888 case XFRM_POLICY_FWD:
889 break;
890
891 default:
892 return -EINVAL;
3ff50b79 893 }
1da177e4
LT		 894
895 return 0;
896}
897
b798a9ed 898static int verify_policy_type(u8 type)
f7b6983f
MN		 899{
900 switch (type) {
901 case XFRM_POLICY_TYPE_MAIN:
902#ifdef CONFIG_XFRM_SUB_POLICY
903 case XFRM_POLICY_TYPE_SUB:
904#endif
905 break;
906
907 default:
908 return -EINVAL;
3ff50b79 909 }
f7b6983f
MN		 910
911 return 0;
912}
913
1da177e4
LT		 914static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
915{
916 switch (p->share) {
917 case XFRM_SHARE_ANY:
918 case XFRM_SHARE_SESSION:
919 case XFRM_SHARE_USER:
920 case XFRM_SHARE_UNIQUE:
921 break;
922
923 default:
924 return -EINVAL;
3ff50b79 925 }
1da177e4
LT		 926
927 switch (p->action) {
928 case XFRM_POLICY_ALLOW:
929 case XFRM_POLICY_BLOCK:
930 break;
931
932 default:
933 return -EINVAL;
3ff50b79 934 }
1da177e4
LT		 935
936 switch (p->sel.family) {
937 case AF_INET:
938 break;
939
940 case AF_INET6:
941#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
942 break;
943#else
944 return -EAFNOSUPPORT;
945#endif
946
947 default:
948 return -EINVAL;
3ff50b79 949 }
1da177e4
LT		 950
951 return verify_policy_dir(p->dir);
952}
953
5424f32e 954static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 955{
5424f32e 956 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 957 struct xfrm_user_sec_ctx *uctx;
958
959 if (!rt)
960 return 0;
961
5424f32e 962 uctx = nla_data(rt);
03e1ad7b 963 return security_xfrm_policy_alloc(&pol->security, uctx);
df71837d
TJ		 964}
965
1da177e4
LT		 966static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
967 int nr)
968{
969 int i;
970
971 xp->xfrm_nr = nr;
972 for (i = 0; i < nr; i++, ut++) {
973 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
974
975 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
976 memcpy(&t->saddr, &ut->saddr,
977 sizeof(xfrm_address_t));
978 t->reqid = ut->reqid;
979 t->mode = ut->mode;
980 t->share = ut->share;
981 t->optional = ut->optional;
982 t->aalgos = ut->aalgos;
983 t->ealgos = ut->ealgos;
984 t->calgos = ut->calgos;
c5d18e98
HX		 985 /* If all masks are ~0, then we allow all algorithms. */
986 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 987 t->encap_family = ut->family;
1da177e4
LT		 988 }
989}
990
b4ad86bf
DM		 991static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
992{
993 int i;
994
995 if (nr > XFRM_MAX_DEPTH)
996 return -EINVAL;
997
998 for (i = 0; i < nr; i++) {
999 /* We never validated the ut->family value, so many
1000 * applications simply leave it at zero. The check was
1001 * never made and ut->family was ignored because all
1002 * templates could be assumed to have the same family as
1003 * the policy itself. Now that we will have ipv4-in-ipv6
1004 * and ipv6-in-ipv4 tunnels, this is no longer true.
1005 */
1006 if (!ut[i].family)
1007 ut[i].family = family;
1008
1009 switch (ut[i].family) {
1010 case AF_INET:
1011 break;
1012#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1013 case AF_INET6:
1014 break;
1015#endif
1016 default:
1017 return -EINVAL;
3ff50b79 1018 }
b4ad86bf
DM		 1019 }
1020
1021 return 0;
1022}
1023
5424f32e 1024static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1025{
5424f32e 1026 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1027
1028 if (!rt) {
1029 pol->xfrm_nr = 0;
1030 } else {
5424f32e
TG		 1031 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1032 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1033 int err;
1da177e4 1034
b4ad86bf
DM		 1035 err = validate_tmpl(nr, utmpl, pol->family);
1036 if (err)
1037 return err;
1da177e4 1038
5424f32e 1039 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1040 }
1041 return 0;
1042}
1043
5424f32e 1044static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1045{
5424f32e 1046 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1047 struct xfrm_userpolicy_type *upt;
b798a9ed 1048 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1049 int err;
1050
1051 if (rt) {
5424f32e 1052 upt = nla_data(rt);
f7b6983f
MN		 1053 type = upt->type;
1054 }
1055
1056 err = verify_policy_type(type);
1057 if (err)
1058 return err;
1059
1060 *tp = type;
1061 return 0;
1062}
1063
1da177e4
LT		 1064static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1065{
1066 xp->priority = p->priority;
1067 xp->index = p->index;
1068 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1069 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1070 xp->action = p->action;
1071 xp->flags = p->flags;
1072 xp->family = p->sel.family;
1073 /* XXX xp->share = p->share; */
1074}
1075
1076static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1077{
1078 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1079 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1080 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1081 p->priority = xp->priority;
1082 p->index = xp->index;
1083 p->sel.family = xp->family;
1084 p->dir = dir;
1085 p->action = xp->action;
1086 p->flags = xp->flags;
1087 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1088}
1089
fc34acd3 1090static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1091{
fc34acd3 1092 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 1093 int err;
1094
1095 if (!xp) {
1096 *errp = -ENOMEM;
1097 return NULL;
1098 }
1099
1100 copy_from_user_policy(xp, p);
df71837d 1101
35a7aa08 1102 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1103 if (err)
1104 goto error;
1105
35a7aa08
TG		 1106 if (!(err = copy_from_user_tmpl(xp, attrs)))
1107 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1108 if (err)
1109 goto error;
1da177e4
LT		 1110
1111 return xp;
f7b6983f
MN		 1112 error:
1113 *errp = err;
12a169e7 1114 xp->walk.dead = 1;
64c31b3f 1115 xfrm_policy_destroy(xp);
f7b6983f 1116 return NULL;
1da177e4
LT		 1117}
1118
22e70050 1119static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1120 struct nlattr **attrs)
1da177e4 1121{
fc34acd3 1122 struct net *net = sock_net(skb->sk);
7b67c857 1123 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1124 struct xfrm_policy *xp;
26b15dad 1125 struct km_event c;
1da177e4
LT		 1126 int err;
1127 int excl;
2532386f
EP		 1128 uid_t loginuid = NETLINK_CB(skb).loginuid;
1129 u32 sessionid = NETLINK_CB(skb).sessionid;
1130 u32 sid = NETLINK_CB(skb).sid;
1da177e4
LT		 1131
1132 err = verify_newpolicy_info(p);
df71837d
TJ		 1133 if (err)
1134 return err;
35a7aa08 1135 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1136 if (err)
1137 return err;
1138
fc34acd3 1139 xp = xfrm_policy_construct(net, p, attrs, &err);
1da177e4
LT		 1140 if (!xp)
1141 return err;
1142
26b15dad
JHS		 1143 /* shouldnt excl be based on nlh flags??
1144 * Aha! this is anti-netlink really i.e more pfkey derived
1145 * in netlink excl is a flag and you wouldnt need
1146 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1147 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1148 err = xfrm_policy_insert(p->dir, xp, excl);
2532386f 1149 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 1150
1da177e4 1151 if (err) {
03e1ad7b 1152 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1153 kfree(xp);
1154 return err;
1155 }
1156
f60f6b8f 1157 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1158 c.seq = nlh->nlmsg_seq;
1159 c.pid = nlh->nlmsg_pid;
1160 km_policy_notify(xp, p->dir, &c);
1161
1da177e4
LT		 1162 xfrm_pol_put(xp);
1163
1164 return 0;
1165}
1166
1167static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1168{
1169 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1170 int i;
1171
1172 if (xp->xfrm_nr == 0)
1173 return 0;
1174
1175 for (i = 0; i < xp->xfrm_nr; i++) {
1176 struct xfrm_user_tmpl *up = &vec[i];
1177 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1178
1179 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1180 up->family = kp->encap_family;
1da177e4
LT		 1181 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1182 up->reqid = kp->reqid;
1183 up->mode = kp->mode;
1184 up->share = kp->share;
1185 up->optional = kp->optional;
1186 up->aalgos = kp->aalgos;
1187 up->ealgos = kp->ealgos;
1188 up->calgos = kp->calgos;
1189 }
df71837d 1190
c0144bea
TG		 1191 return nla_put(skb, XFRMA_TMPL,
1192 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1193}
1194
1195static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1196{
1197 if (x->security) {
1198 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1199 }
1200 return 0;
0d681623 1201}
df71837d 1202
0d681623
SH		 1203static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1204{
1205 if (xp->security) {
1206 return copy_sec_ctx(xp->security, skb);
1207 }
1208 return 0;
df71837d 1209}
cfbfd45a
TG		 1210static inline size_t userpolicy_type_attrsize(void)
1211{
1212#ifdef CONFIG_XFRM_SUB_POLICY
1213 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1214#else
1215 return 0;
1216#endif
1217}
df71837d 1218
f7b6983f 1219#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1220static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1221{
c0144bea
TG		 1222 struct xfrm_userpolicy_type upt = {
1223 .type = type,
1224 };
f7b6983f 1225
c0144bea 1226 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1227}
1228
1229#else
b798a9ed 1230static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1231{
1232 return 0;
1233}
1234#endif
1235
1da177e4
LT		 1236static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1237{
1238 struct xfrm_dump_info *sp = ptr;
1239 struct xfrm_userpolicy_info *p;
1240 struct sk_buff *in_skb = sp->in_skb;
1241 struct sk_buff *skb = sp->out_skb;
1242 struct nlmsghdr *nlh;
1da177e4 1243
79b8b7f4
TG		 1244 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1245 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1246 if (nlh == NULL)
1247 return -EMSGSIZE;
1da177e4 1248
7b67c857 1249 p = nlmsg_data(nlh);
1da177e4
LT		 1250 copy_to_user_policy(xp, p, dir);
1251 if (copy_to_user_tmpl(xp, skb) < 0)
1252 goto nlmsg_failure;
df71837d
TJ		 1253 if (copy_to_user_sec_ctx(xp, skb))
1254 goto nlmsg_failure;
1459bb36 1255 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 1256 goto nlmsg_failure;
1da177e4 1257
9825069d 1258 nlmsg_end(skb, nlh);
1da177e4
LT		 1259 return 0;
1260
1261nlmsg_failure:
9825069d
TG		 1262 nlmsg_cancel(skb, nlh);
1263 return -EMSGSIZE;
1da177e4
LT		 1264}
1265
4c563f76
TT		 1266static int xfrm_dump_policy_done(struct netlink_callback *cb)
1267{
1268 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1269
1270 xfrm_policy_walk_done(walk);
1271 return 0;
1272}
1273
1da177e4
LT		 1274static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1275{
fc34acd3 1276 struct net *net = sock_net(skb->sk);
4c563f76 1277 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1278 struct xfrm_dump_info info;
1279
4c563f76
TT		 1280 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1281 sizeof(cb->args) - sizeof(cb->args[0]));
1282
1da177e4
LT		 1283 info.in_skb = cb->skb;
1284 info.out_skb = skb;
1285 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1286 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1287
1288 if (!cb->args[0]) {
1289 cb->args[0] = 1;
1290 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1291 }
1292
fc34acd3 1293 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
1da177e4
LT		 1294
1295 return skb->len;
1296}
1297
1298static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1299 struct xfrm_policy *xp,
1300 int dir, u32 seq)
1301{
1302 struct xfrm_dump_info info;
1303 struct sk_buff *skb;
1304
7deb2264 1305 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1306 if (!skb)
1307 return ERR_PTR(-ENOMEM);
1308
1da177e4
LT		 1309 info.in_skb = in_skb;
1310 info.out_skb = skb;
1311 info.nlmsg_seq = seq;
1312 info.nlmsg_flags = 0;
1da177e4
LT		 1313
1314 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1315 kfree_skb(skb);
1316 return NULL;
1317 }
1318
1319 return skb;
1320}
1321
22e70050 1322static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1323 struct nlattr **attrs)
1da177e4 1324{
fc34acd3 1325 struct net *net = sock_net(skb->sk);
1da177e4
LT		 1326 struct xfrm_policy *xp;
1327 struct xfrm_userpolicy_id *p;
b798a9ed 1328 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1329 int err;
26b15dad 1330 struct km_event c;
1da177e4
LT		 1331 int delete;
1332
7b67c857 1333 p = nlmsg_data(nlh);
1da177e4
LT		 1334 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1335
35a7aa08 1336 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1337 if (err)
1338 return err;
1339
1da177e4
LT		 1340 err = verify_policy_dir(p->dir);
1341 if (err)
1342 return err;
1343
1344 if (p->index)
a6483b79 1345 xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err);
df71837d 1346 else {
5424f32e 1347 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1348 struct xfrm_sec_ctx *ctx;
df71837d 1349
35a7aa08 1350 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1351 if (err)
1352 return err;
1353
2c8dd116 1354 ctx = NULL;
df71837d 1355 if (rt) {
5424f32e 1356 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1357
03e1ad7b
PM		 1358 err = security_xfrm_policy_alloc(&ctx, uctx);
1359 if (err)
df71837d 1360 return err;
2c8dd116 1361 }
a6483b79 1362 xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx,
ef41aaa0 1363 delete, &err);
03e1ad7b 1364 security_xfrm_policy_free(ctx);
df71837d 1365 }
1da177e4
LT		 1366 if (xp == NULL)
1367 return -ENOENT;
1368
1369 if (!delete) {
1370 struct sk_buff *resp_skb;
1371
1372 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1373 if (IS_ERR(resp_skb)) {
1374 err = PTR_ERR(resp_skb);
1375 } else {
a6483b79 1376 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
082a1ad5 1377 NETLINK_CB(skb).pid);
1da177e4 1378 }
26b15dad 1379 } else {
2532386f
EP		 1380 uid_t loginuid = NETLINK_CB(skb).loginuid;
1381 u32 sessionid = NETLINK_CB(skb).sessionid;
1382 u32 sid = NETLINK_CB(skb).sid;
1383
1384 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1385 sid);
13fcfbb0
DM		 1386
1387 if (err != 0)
c8c05a8e 1388 goto out;
13fcfbb0 1389
e7443892 1390 c.data.byid = p->index;
f60f6b8f 1391 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1392 c.seq = nlh->nlmsg_seq;
1393 c.pid = nlh->nlmsg_pid;
1394 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1395 }
1396
c8c05a8e 1397out:
ef41aaa0 1398 xfrm_pol_put(xp);
1da177e4
LT		 1399 return err;
1400}
1401
22e70050 1402static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1403 struct nlattr **attrs)
1da177e4 1404{
fc34acd3 1405 struct net *net = sock_net(skb->sk);
26b15dad 1406 struct km_event c;
7b67c857 1407 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1408 struct xfrm_audit audit_info;
4aa2e62c 1409 int err;
1da177e4 1410
161a09e7 1411 audit_info.loginuid = NETLINK_CB(skb).loginuid;
2532386f 1412 audit_info.sessionid = NETLINK_CB(skb).sessionid;
161a09e7 1413 audit_info.secid = NETLINK_CB(skb).sid;
fc34acd3 1414 err = xfrm_state_flush(net, p->proto, &audit_info);
4aa2e62c
JL		 1415 if (err)
1416 return err;
bf08867f 1417 c.data.proto = p->proto;
f60f6b8f 1418 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1419 c.seq = nlh->nlmsg_seq;
1420 c.pid = nlh->nlmsg_pid;
7067802e 1421 c.net = net;
26b15dad
JHS		 1422 km_state_notify(NULL, &c);
1423
1da177e4
LT		 1424 return 0;
1425}
1426
7deb2264
TG		 1427static inline size_t xfrm_aevent_msgsize(void)
1428{
1429 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1430 + nla_total_size(sizeof(struct xfrm_replay_state))
1431 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1432 + nla_total_size(4) /* XFRM_AE_RTHR */
1433 + nla_total_size(4); /* XFRM_AE_ETHR */
1434}
d51d081d
JHS		 1435
1436static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1437{
1438 struct xfrm_aevent_id *id;
1439 struct nlmsghdr *nlh;
d51d081d 1440
79b8b7f4
TG		 1441 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1442 if (nlh == NULL)
1443 return -EMSGSIZE;
d51d081d 1444
7b67c857 1445 id = nlmsg_data(nlh);
2b5f6dcc 1446 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1447 id->sa_id.spi = x->id.spi;
1448 id->sa_id.family = x->props.family;
1449 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1450 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1451 id->reqid = x->props.reqid;
d51d081d
JHS		 1452 id->flags = c->data.aevent;
1453
c0144bea
TG		 1454 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1455 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
d51d081d 1456
c0144bea
TG		 1457 if (id->flags & XFRM_AE_RTHR)
1458 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
d51d081d 1459
c0144bea
TG		 1460 if (id->flags & XFRM_AE_ETHR)
1461 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1462 x->replay_maxage * 10 / HZ);
d51d081d 1463
9825069d 1464 return nlmsg_end(skb, nlh);
d51d081d 1465
c0144bea 1466nla_put_failure:
9825069d
TG		 1467 nlmsg_cancel(skb, nlh);
1468 return -EMSGSIZE;
d51d081d
JHS		 1469}
1470
22e70050 1471static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1472 struct nlattr **attrs)
d51d081d 1473{
fc34acd3 1474 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1475 struct xfrm_state *x;
1476 struct sk_buff *r_skb;
1477 int err;
1478 struct km_event c;
7b67c857 1479 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1480 struct xfrm_usersa_id *id = &p->sa_id;
1481
7deb2264 1482 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 1483 if (r_skb == NULL)
1484 return -ENOMEM;
1485
a6483b79 1486 x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family);
d51d081d 1487 if (x == NULL) {
b08d5840 1488 kfree_skb(r_skb);
d51d081d
JHS		 1489 return -ESRCH;
1490 }
1491
1492 /*
1493 * XXX: is this lock really needed - none of the other
1494 * gets lock (the concern is things getting updated
1495 * while we are still reading) - jhs
1496 */
1497 spin_lock_bh(&x->lock);
1498 c.data.aevent = p->flags;
1499 c.seq = nlh->nlmsg_seq;
1500 c.pid = nlh->nlmsg_pid;
1501
1502 if (build_aevent(r_skb, x, &c) < 0)
1503 BUG();
a6483b79 1504 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
d51d081d
JHS		 1505 spin_unlock_bh(&x->lock);
1506 xfrm_state_put(x);
1507 return err;
1508}
1509
22e70050 1510static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1511 struct nlattr **attrs)
d51d081d 1512{
fc34acd3 1513 struct net *net = sock_net(skb->sk);
d51d081d
JHS		 1514 struct xfrm_state *x;
1515 struct km_event c;
1516 int err = - EINVAL;
7b67c857 1517 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e
TG		 1518 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1519 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d
JHS		 1520
1521 if (!lt && !rp)
1522 return err;
1523
1524 /* pedantic mode - thou shalt sayeth replaceth */
1525 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1526 return err;
1527
fc34acd3 1528 x = xfrm_state_lookup(net, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1529 if (x == NULL)
1530 return -ESRCH;
1531
1532 if (x->km.state != XFRM_STATE_VALID)
1533 goto out;
1534
1535 spin_lock_bh(&x->lock);
35a7aa08 1536 xfrm_update_ae_params(x, attrs);
d51d081d 1537 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1538
1539 c.event = nlh->nlmsg_type;
1540 c.seq = nlh->nlmsg_seq;
1541 c.pid = nlh->nlmsg_pid;
1542 c.data.aevent = XFRM_AE_CU;
1543 km_state_notify(x, &c);
1544 err = 0;
1545out:
1546 xfrm_state_put(x);
1547 return err;
1548}
1549
22e70050 1550static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1551 struct nlattr **attrs)
1da177e4 1552{
fc34acd3 1553 struct net *net = sock_net(skb->sk);
f7b6983f 1554 struct km_event c;
b798a9ed 1555 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1556 int err;
161a09e7 1557 struct xfrm_audit audit_info;
f7b6983f 1558
35a7aa08 1559 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1560 if (err)
1561 return err;
26b15dad 1562
161a09e7 1563 audit_info.loginuid = NETLINK_CB(skb).loginuid;
2532386f 1564 audit_info.sessionid = NETLINK_CB(skb).sessionid;
161a09e7 1565 audit_info.secid = NETLINK_CB(skb).sid;
fc34acd3 1566 err = xfrm_policy_flush(net, type, &audit_info);
4aa2e62c
JL		 1567 if (err)
1568 return err;
f7b6983f 1569 c.data.type = type;
f60f6b8f 1570 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1571 c.seq = nlh->nlmsg_seq;
1572 c.pid = nlh->nlmsg_pid;
7067802e 1573 c.net = net;
26b15dad 1574 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1575 return 0;
1576}
1577
22e70050 1578static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1579 struct nlattr **attrs)
6c5c8ca7 1580{
fc34acd3 1581 struct net *net = sock_net(skb->sk);
6c5c8ca7 1582 struct xfrm_policy *xp;
7b67c857 1583 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1584 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1585 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7
JHS		 1586 int err = -ENOENT;
1587
35a7aa08 1588 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1589 if (err)
1590 return err;
1591
6c5c8ca7 1592 if (p->index)
fc34acd3 1593 xp = xfrm_policy_byid(net, type, p->dir, p->index, 0, &err);
6c5c8ca7 1594 else {
5424f32e 1595 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1596 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1597
35a7aa08 1598 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1599 if (err)
1600 return err;
1601
2c8dd116 1602 ctx = NULL;
6c5c8ca7 1603 if (rt) {
5424f32e 1604 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1605
03e1ad7b
PM		 1606 err = security_xfrm_policy_alloc(&ctx, uctx);
1607 if (err)
6c5c8ca7 1608 return err;
2c8dd116 1609 }
fc34acd3 1610 xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx, 0, &err);
03e1ad7b 1611 security_xfrm_policy_free(ctx);
6c5c8ca7 1612 }
6c5c8ca7 1613 if (xp == NULL)
ef41aaa0 1614 return -ENOENT;
03e1ad7b 1615
ef41aaa0 1616 read_lock(&xp->lock);
12a169e7 1617 if (xp->walk.dead) {
6c5c8ca7
JHS		 1618 read_unlock(&xp->lock);
1619 goto out;
1620 }
1621
1622 read_unlock(&xp->lock);
1623 err = 0;
1624 if (up->hard) {
2532386f
EP		 1625 uid_t loginuid = NETLINK_CB(skb).loginuid;
1626 uid_t sessionid = NETLINK_CB(skb).sessionid;
1627 u32 sid = NETLINK_CB(skb).sid;
6c5c8ca7 1628 xfrm_policy_delete(xp, p->dir);
2532386f 1629 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
161a09e7 1630
6c5c8ca7
JHS		 1631 } else {
1632 // reset the timers here?
1633 printk("Dont know what to do with soft policy expire\n");
1634 }
1635 km_policy_expired(xp, p->dir, up->hard, current->pid);
1636
1637out:
1638 xfrm_pol_put(xp);
1639 return err;
1640}
1641
22e70050 1642static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1643 struct nlattr **attrs)
53bc6b4d 1644{
fc34acd3 1645 struct net *net = sock_net(skb->sk);
53bc6b4d
JHS		 1646 struct xfrm_state *x;
1647 int err;
7b67c857 1648 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d
JHS		 1649 struct xfrm_usersa_info *p = &ue->state;
1650
fc34acd3 1651 x = xfrm_state_lookup(net, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1652
3a765aa5 1653 err = -ENOENT;
53bc6b4d
JHS		 1654 if (x == NULL)
1655 return err;
1656
53bc6b4d 1657 spin_lock_bh(&x->lock);
3a765aa5 1658 err = -EINVAL;
53bc6b4d
JHS		 1659 if (x->km.state != XFRM_STATE_VALID)
1660 goto out;
1661 km_state_expired(x, ue->hard, current->pid);
1662
161a09e7 1663 if (ue->hard) {
2532386f
EP		 1664 uid_t loginuid = NETLINK_CB(skb).loginuid;
1665 uid_t sessionid = NETLINK_CB(skb).sessionid;
1666 u32 sid = NETLINK_CB(skb).sid;
53bc6b4d 1667 __xfrm_state_delete(x);
2532386f 1668 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
161a09e7 1669 }
3a765aa5 1670 err = 0;
53bc6b4d
JHS		 1671out:
1672 spin_unlock_bh(&x->lock);
1673 xfrm_state_put(x);
1674 return err;
1675}
1676
22e70050 1677static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1678 struct nlattr **attrs)
980ebd25 1679{
fc34acd3 1680 struct net *net = sock_net(skb->sk);
980ebd25
JHS		 1681 struct xfrm_policy *xp;
1682 struct xfrm_user_tmpl *ut;
1683 int i;
5424f32e 1684 struct nlattr *rt = attrs[XFRMA_TMPL];
980ebd25 1685
7b67c857 1686 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
fc34acd3 1687 struct xfrm_state *x = xfrm_state_alloc(net);
980ebd25
JHS		 1688 int err = -ENOMEM;
1689
1690 if (!x)
d8eb9307 1691 goto nomem;
980ebd25
JHS		 1692
1693 err = verify_newpolicy_info(&ua->policy);
d8eb9307
IJ		 1694 if (err)
1695 goto bad_policy;
980ebd25
JHS		 1696
1697 /* build an XP */
fc34acd3 1698 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
d8eb9307
IJ		 1699 if (!xp)
1700 goto free_state;
980ebd25
JHS		 1701
1702 memcpy(&x->id, &ua->id, sizeof(ua->id));
1703 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1704 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1705
5424f32e 1706 ut = nla_data(rt);
980ebd25
JHS		 1707 /* extract the templates and for each call km_key */
1708 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1709 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1710 memcpy(&x->id, &t->id, sizeof(x->id));
1711 x->props.mode = t->mode;
1712 x->props.reqid = t->reqid;
1713 x->props.family = ut->family;
1714 t->aalgos = ua->aalgos;
1715 t->ealgos = ua->ealgos;
1716 t->calgos = ua->calgos;
1717 err = km_query(x, t, xp);
1718
1719 }
1720
1721 kfree(x);
1722 kfree(xp);
1723
1724 return 0;
d8eb9307
IJ		 1725
1726bad_policy:
1727 printk("BAD policy passed\n");
1728free_state:
1729 kfree(x);
1730nomem:
1731 return err;
980ebd25
JHS		 1732}
1733
5c79de6e 1734#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 1735static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 1736 struct xfrm_kmaddress *k,
5424f32e 1737 struct nlattr **attrs, int *num)
5c79de6e 1738{
5424f32e 1739 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 1740 struct xfrm_user_migrate *um;
1741 int i, num_migrate;
1742
13c1d189
AE		 1743 if (k != NULL) {
1744 struct xfrm_user_kmaddress *uk;
1745
1746 uk = nla_data(attrs[XFRMA_KMADDRESS]);
1747 memcpy(&k->local, &uk->local, sizeof(k->local));
1748 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
1749 k->family = uk->family;
1750 k->reserved = uk->reserved;
1751 }
1752
5424f32e
TG		 1753 um = nla_data(rt);
1754 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 1755
1756 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1757 return -EINVAL;
1758
1759 for (i = 0; i < num_migrate; i++, um++, ma++) {
1760 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1761 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1762 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1763 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1764
1765 ma->proto = um->proto;
1766 ma->mode = um->mode;
1767 ma->reqid = um->reqid;
1768
1769 ma->old_family = um->old_family;
1770 ma->new_family = um->new_family;
1771 }
1772
1773 *num = i;
1774 return 0;
1775}
1776
1777static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1778 struct nlattr **attrs)
5c79de6e 1779{
7b67c857 1780 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 1781 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 1782 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 1783 u8 type;
1784 int err;
1785 int n = 0;
1786
35a7aa08 1787 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 1788 return -EINVAL;
5c79de6e 1789
13c1d189
AE		 1790 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
1791
5424f32e 1792 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 1793 if (err)
1794 return err;
1795
13c1d189 1796 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 1797 if (err)
1798 return err;
1799
1800 if (!n)
1801 return 0;
1802
13c1d189 1803 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
5c79de6e
SS		 1804
1805 return 0;
1806}
1807#else
1808static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1809 struct nlattr **attrs)
5c79de6e
SS		 1810{
1811 return -ENOPROTOOPT;
1812}
1813#endif
1814
1815#ifdef CONFIG_XFRM_MIGRATE
1816static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1817{
1818 struct xfrm_user_migrate um;
1819
1820 memset(&um, 0, sizeof(um));
1821 um.proto = m->proto;
1822 um.mode = m->mode;
1823 um.reqid = m->reqid;
1824 um.old_family = m->old_family;
1825 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1826 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1827 um.new_family = m->new_family;
1828 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1829 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1830
c0144bea 1831 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 1832}
1833
13c1d189
AE		 1834static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb)
1835{
1836 struct xfrm_user_kmaddress uk;
1837
1838 memset(&uk, 0, sizeof(uk));
1839 uk.family = k->family;
1840 uk.reserved = k->reserved;
1841 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 1842 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 1843
1844 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
1845}
1846
1847static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 1848{
1849 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 1850 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
1851 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1852 + userpolicy_type_attrsize();
7deb2264
TG		 1853}
1854
5c79de6e 1855static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
13c1d189
AE		 1856 int num_migrate, struct xfrm_kmaddress *k,
1857 struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e
SS		 1858{
1859 struct xfrm_migrate *mp;
1860 struct xfrm_userpolicy_id *pol_id;
1861 struct nlmsghdr *nlh;
5c79de6e
SS		 1862 int i;
1863
79b8b7f4
TG		 1864 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1865 if (nlh == NULL)
1866 return -EMSGSIZE;
5c79de6e 1867
7b67c857 1868 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 1869 /* copy data from selector, dir, and type to the pol_id */
1870 memset(pol_id, 0, sizeof(*pol_id));
1871 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1872 pol_id->dir = dir;
1873
13c1d189
AE		 1874 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
1875 goto nlmsg_failure;
1876
5c79de6e
SS		 1877 if (copy_to_user_policy_type(type, skb) < 0)
1878 goto nlmsg_failure;
1879
1880 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1881 if (copy_to_user_migrate(mp, skb) < 0)
1882 goto nlmsg_failure;
1883 }
1884
9825069d 1885 return nlmsg_end(skb, nlh);
5c79de6e 1886nlmsg_failure:
9825069d
TG		 1887 nlmsg_cancel(skb, nlh);
1888 return -EMSGSIZE;
5c79de6e
SS		 1889}
1890
1891static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 1892 struct xfrm_migrate *m, int num_migrate,
1893 struct xfrm_kmaddress *k)
5c79de6e 1894{
a6483b79 1895 struct net *net = &init_net;
5c79de6e 1896 struct sk_buff *skb;
5c79de6e 1897
13c1d189 1898 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 1899 if (skb == NULL)
1900 return -ENOMEM;
1901
1902 /* build migrate */
13c1d189 1903 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 1904 BUG();
1905
a6483b79 1906 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 1907}
1908#else
1909static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 1910 struct xfrm_migrate *m, int num_migrate,
1911 struct xfrm_kmaddress *k)
5c79de6e
SS		 1912{
1913 return -ENOPROTOOPT;
1914}
1915#endif
d51d081d 1916
fc8c7dc1
DM		 1917/* For the xfrm_usersa_info cases we have to work around some 32-bit vs.
1918 * 64-bit compatability issues. On 32-bit the structure is 220 bytes, but
1919 * for 64-bit it gets padded out to 224 bytes. Those bytes are just
1920 * padding and don't have any content we care about. Therefore as long
1921 * as we have enough bytes for the content we can make both cases work.
1922 */
1923
a7bd9a45 1924#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 1925
1926static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
fc8c7dc1 1927 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = 220, /* see above */
492b558b
TG		 1928 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1929 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1930 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1931 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1932 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1933 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 1934 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 1935 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b 1936 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
fc8c7dc1 1937 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = 220, /* see above */
6c5c8ca7 1938 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 1939 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 1940 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 1941 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1942 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 1943 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 1944 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 1945 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1946 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 1947};
1948
492b558b
TG		 1949#undef XMSGSIZE
1950
cf5cb79f 1951static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1a6509d9 1952 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 1953 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1954 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1955 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1956 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1957 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1958 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1959 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1960 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1961 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1962 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1963 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1964 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1965 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1966 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 1967 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
cf5cb79f
TG		 1968};
1969
1da177e4 1970static struct xfrm_link {
5424f32e 1971 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 1972 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 1973 int (*done)(struct netlink_callback *);
492b558b
TG		 1974} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1975 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1976 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1977 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 1978 .dump = xfrm_dump_sa,
1979 .done = xfrm_dump_sa_done },
492b558b
TG		 1980 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1981 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1982 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 1983 .dump = xfrm_dump_policy,
1984 .done = xfrm_dump_policy_done },
492b558b 1985 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 1986 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 1987 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 1988 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1989 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 1990 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 1991 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1992 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 1993 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1994 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 1995 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 1996 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 1997 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 1998};
1999
1d00a4eb 2000static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 2001{
a6483b79 2002 struct net *net = sock_net(skb->sk);
35a7aa08 2003 struct nlattr *attrs[XFRMA_MAX+1];
1da177e4 2004 struct xfrm_link *link;
a7bd9a45 2005 int type, err;
1da177e4 2006
1da177e4 2007 type = nlh->nlmsg_type;
1da177e4 2008 if (type > XFRM_MSG_MAX)
1d00a4eb 2009 return -EINVAL;
1da177e4
LT		 2010
2011 type -= XFRM_MSG_BASE;
2012 link = &xfrm_dispatch[type];
2013
2014 /* All operations require privileges, even GET */
1d00a4eb
TG		 2015 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2016 return -EPERM;
1da177e4 2017
492b558b
TG		 2018 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2019 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2020 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 2021 if (link->dump == NULL)
1d00a4eb 2022 return -EINVAL;
88fc2c84 2023
a6483b79 2024 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
1da177e4
LT		 2025 }
2026
35a7aa08 2027 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2028 xfrma_policy);
a7bd9a45
TG		 2029 if (err < 0)
2030 return err;
1da177e4
LT		 2031
2032 if (link->doit == NULL)
1d00a4eb 2033 return -EINVAL;
1da177e4 2034
5424f32e 2035 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2036}
2037
cd40b7d3 2038static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2039{
cd40b7d3
DL		 2040 mutex_lock(&xfrm_cfg_mutex);
2041 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2042 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 2043}
2044
7deb2264
TG		 2045static inline size_t xfrm_expire_msgsize(void)
2046{
2047 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
2048}
2049
d51d081d 2050static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2051{
2052 struct xfrm_user_expire *ue;
2053 struct nlmsghdr *nlh;
1da177e4 2054
79b8b7f4
TG		 2055 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2056 if (nlh == NULL)
2057 return -EMSGSIZE;
1da177e4 2058
7b67c857 2059 ue = nlmsg_data(nlh);
1da177e4 2060 copy_to_user_state(x, &ue->state);
d51d081d 2061 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2062
9825069d 2063 return nlmsg_end(skb, nlh);
1da177e4
LT		 2064}
2065
26b15dad 2066static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1da177e4 2067{
fc34acd3 2068 struct net *net = xs_net(x);
1da177e4
LT		 2069 struct sk_buff *skb;
2070
7deb2264 2071 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2072 if (skb == NULL)
2073 return -ENOMEM;
2074
d51d081d 2075 if (build_expire(skb, x, c) < 0)
1da177e4
LT		 2076 BUG();
2077
a6483b79 2078 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2079}
2080
d51d081d
JHS		 2081static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2082{
fc34acd3 2083 struct net *net = xs_net(x);
d51d081d 2084 struct sk_buff *skb;
d51d081d 2085
7deb2264 2086 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 2087 if (skb == NULL)
2088 return -ENOMEM;
2089
2090 if (build_aevent(skb, x, c) < 0)
2091 BUG();
2092
a6483b79 2093 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2094}
2095
26b15dad
JHS		 2096static int xfrm_notify_sa_flush(struct km_event *c)
2097{
7067802e 2098 struct net *net = c->net;
26b15dad
JHS		 2099 struct xfrm_usersa_flush *p;
2100 struct nlmsghdr *nlh;
2101 struct sk_buff *skb;
7deb2264 2102 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2103
7deb2264 2104 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2105 if (skb == NULL)
2106 return -ENOMEM;
26b15dad 2107
79b8b7f4
TG		 2108 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2109 if (nlh == NULL) {
2110 kfree_skb(skb);
2111 return -EMSGSIZE;
2112 }
26b15dad 2113
7b67c857 2114 p = nlmsg_data(nlh);
bf08867f 2115 p->proto = c->data.proto;
26b15dad 2116
9825069d 2117 nlmsg_end(skb, nlh);
26b15dad 2118
a6483b79 2119 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2120}
2121
7deb2264 2122static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2123{
7deb2264 2124 size_t l = 0;
1a6509d9
HX		 2125 if (x->aead)
2126 l += nla_total_size(aead_len(x->aead));
26b15dad 2127 if (x->aalg)
0f99be0d 2128 l += nla_total_size(xfrm_alg_len(x->aalg));
26b15dad 2129 if (x->ealg)
0f99be0d 2130 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2131 if (x->calg)
7deb2264 2132 l += nla_total_size(sizeof(*x->calg));
26b15dad 2133 if (x->encap)
7deb2264 2134 l += nla_total_size(sizeof(*x->encap));
68325d3b
HX		 2135 if (x->security)
2136 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2137 x->security->ctx_len);
2138 if (x->coaddr)
2139 l += nla_total_size(sizeof(*x->coaddr));
2140
d26f3984
HX		 2141 /* Must count x->lastused as it may become non-zero behind our back. */
2142 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2143
2144 return l;
2145}
2146
2147static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2148{
fc34acd3 2149 struct net *net = xs_net(x);
26b15dad 2150 struct xfrm_usersa_info *p;
0603eac0 2151 struct xfrm_usersa_id *id;
26b15dad
JHS		 2152 struct nlmsghdr *nlh;
2153 struct sk_buff *skb;
26b15dad 2154 int len = xfrm_sa_len(x);
0603eac0
HX		 2155 int headlen;
2156
2157 headlen = sizeof(*p);
2158 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2159 len += nla_total_size(headlen);
0603eac0
HX		 2160 headlen = sizeof(*id);
2161 }
7deb2264 2162 len += NLMSG_ALIGN(headlen);
26b15dad 2163
7deb2264 2164 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2165 if (skb == NULL)
2166 return -ENOMEM;
26b15dad 2167
79b8b7f4
TG		 2168 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2169 if (nlh == NULL)
c0144bea 2170 goto nla_put_failure;
26b15dad 2171
7b67c857 2172 p = nlmsg_data(nlh);
0603eac0 2173 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2174 struct nlattr *attr;
2175
7b67c857 2176 id = nlmsg_data(nlh);
0603eac0
HX		 2177 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2178 id->spi = x->id.spi;
2179 id->family = x->props.family;
2180 id->proto = x->id.proto;
2181
c0144bea
TG		 2182 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2183 if (attr == NULL)
2184 goto nla_put_failure;
2185
2186 p = nla_data(attr);
0603eac0
HX		 2187 }
2188
68325d3b
HX		 2189 if (copy_to_user_state_extra(x, p, skb))
2190 goto nla_put_failure;
26b15dad 2191
9825069d 2192 nlmsg_end(skb, nlh);
26b15dad 2193
a6483b79 2194 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2195
c0144bea 2196nla_put_failure:
68325d3b
HX		 2197 /* Somebody screwed up with xfrm_sa_len! */
2198 WARN_ON(1);
26b15dad
JHS		 2199 kfree_skb(skb);
2200 return -1;
2201}
2202
2203static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2204{
2205
2206 switch (c->event) {
f60f6b8f 2207 case XFRM_MSG_EXPIRE:
26b15dad 2208 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2209 case XFRM_MSG_NEWAE:
2210 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2211 case XFRM_MSG_DELSA:
2212 case XFRM_MSG_UPDSA:
2213 case XFRM_MSG_NEWSA:
26b15dad 2214 return xfrm_notify_sa(x, c);
f60f6b8f 2215 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2216 return xfrm_notify_sa_flush(c);
2217 default:
2218 printk("xfrm_user: Unknown SA event %d\n", c->event);
2219 break;
2220 }
2221
2222 return 0;
2223
2224}
2225
7deb2264
TG		 2226static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2227 struct xfrm_policy *xp)
2228{
2229 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2230 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2231 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2232 + userpolicy_type_attrsize();
2233}
2234
1da177e4
LT		 2235static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2236 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2237 int dir)
2238{
2239 struct xfrm_user_acquire *ua;
2240 struct nlmsghdr *nlh;
1da177e4
LT		 2241 __u32 seq = xfrm_get_acqseq();
2242
79b8b7f4
TG		 2243 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2244 if (nlh == NULL)
2245 return -EMSGSIZE;
1da177e4 2246
7b67c857 2247 ua = nlmsg_data(nlh);
1da177e4
LT		 2248 memcpy(&ua->id, &x->id, sizeof(ua->id));
2249 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2250 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2251 copy_to_user_policy(xp, &ua->policy, dir);
2252 ua->aalgos = xt->aalgos;
2253 ua->ealgos = xt->ealgos;
2254 ua->calgos = xt->calgos;
2255 ua->seq = x->km.seq = seq;
2256
2257 if (copy_to_user_tmpl(xp, skb) < 0)
2258 goto nlmsg_failure;
0d681623 2259 if (copy_to_user_state_sec_ctx(x, skb))
df71837d 2260 goto nlmsg_failure;
1459bb36 2261 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2262 goto nlmsg_failure;
1da177e4 2263
9825069d 2264 return nlmsg_end(skb, nlh);
1da177e4
LT		 2265
2266nlmsg_failure:
9825069d
TG		 2267 nlmsg_cancel(skb, nlh);
2268 return -EMSGSIZE;
1da177e4
LT		 2269}
2270
2271static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2272 struct xfrm_policy *xp, int dir)
2273{
a6483b79 2274 struct net *net = xs_net(x);
1da177e4 2275 struct sk_buff *skb;
1da177e4 2276
7deb2264 2277 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2278 if (skb == NULL)
2279 return -ENOMEM;
2280
2281 if (build_acquire(skb, x, xt, xp, dir) < 0)
2282 BUG();
2283
a6483b79 2284 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2285}
2286
2287/* User gives us xfrm_user_policy_info followed by an array of 0
2288 * or more templates.
2289 */
cb969f07 2290static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2291 u8 *data, int len, int *dir)
2292{
fc34acd3 2293 struct net *net = sock_net(sk);
1da177e4
LT		 2294 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2295 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2296 struct xfrm_policy *xp;
2297 int nr;
2298
cb969f07 2299 switch (sk->sk_family) {
1da177e4
LT		 2300 case AF_INET:
2301 if (opt != IP_XFRM_POLICY) {
2302 *dir = -EOPNOTSUPP;
2303 return NULL;
2304 }
2305 break;
2306#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2307 case AF_INET6:
2308 if (opt != IPV6_XFRM_POLICY) {
2309 *dir = -EOPNOTSUPP;
2310 return NULL;
2311 }
2312 break;
2313#endif
2314 default:
2315 *dir = -EINVAL;
2316 return NULL;
2317 }
2318
2319 *dir = -EINVAL;
2320
2321 if (len < sizeof(*p) ||
2322 verify_newpolicy_info(p))
2323 return NULL;
2324
2325 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2326 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2327 return NULL;
2328
a4f1bac6
HX		 2329 if (p->dir > XFRM_POLICY_OUT)
2330 return NULL;
2331
fc34acd3 2332 xp = xfrm_policy_alloc(net, GFP_KERNEL);
1da177e4
LT		 2333 if (xp == NULL) {
2334 *dir = -ENOBUFS;
2335 return NULL;
2336 }
2337
2338 copy_from_user_policy(xp, p);
f7b6983f 2339 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2340 copy_templates(xp, ut, nr);
2341
2342 *dir = p->dir;
2343
2344 return xp;
2345}
2346
7deb2264
TG		 2347static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2348{
2349 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2350 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2351 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2352 + userpolicy_type_attrsize();
2353}
2354
1da177e4 2355static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
d51d081d 2356 int dir, struct km_event *c)
1da177e4
LT		 2357{
2358 struct xfrm_user_polexpire *upe;
2359 struct nlmsghdr *nlh;
d51d081d 2360 int hard = c->data.hard;
1da177e4 2361
79b8b7f4
TG		 2362 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2363 if (nlh == NULL)
2364 return -EMSGSIZE;
1da177e4 2365
7b67c857 2366 upe = nlmsg_data(nlh);
1da177e4
LT		 2367 copy_to_user_policy(xp, &upe->pol, dir);
2368 if (copy_to_user_tmpl(xp, skb) < 0)
2369 goto nlmsg_failure;
df71837d
TJ		 2370 if (copy_to_user_sec_ctx(xp, skb))
2371 goto nlmsg_failure;
1459bb36 2372 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2373 goto nlmsg_failure;
1da177e4
LT		 2374 upe->hard = !!hard;
2375
9825069d 2376 return nlmsg_end(skb, nlh);
1da177e4
LT		 2377
2378nlmsg_failure:
9825069d
TG		 2379 nlmsg_cancel(skb, nlh);
2380 return -EMSGSIZE;
1da177e4
LT		 2381}
2382
26b15dad 2383static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4 2384{
fc34acd3 2385 struct net *net = xp_net(xp);
1da177e4 2386 struct sk_buff *skb;
1da177e4 2387
7deb2264 2388 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2389 if (skb == NULL)
2390 return -ENOMEM;
2391
d51d081d 2392 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2393 BUG();
2394
a6483b79 2395 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2396}
2397
26b15dad
JHS		 2398static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2399{
fc34acd3 2400 struct net *net = xp_net(xp);
26b15dad 2401 struct xfrm_userpolicy_info *p;
0603eac0 2402 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2403 struct nlmsghdr *nlh;
2404 struct sk_buff *skb;
7deb2264 2405 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
0603eac0
HX		 2406 int headlen;
2407
2408 headlen = sizeof(*p);
2409 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2410 len += nla_total_size(headlen);
0603eac0
HX		 2411 headlen = sizeof(*id);
2412 }
cfbfd45a 2413 len += userpolicy_type_attrsize();
7deb2264 2414 len += NLMSG_ALIGN(headlen);
26b15dad 2415
7deb2264 2416 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2417 if (skb == NULL)
2418 return -ENOMEM;
26b15dad 2419
79b8b7f4
TG		 2420 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2421 if (nlh == NULL)
2422 goto nlmsg_failure;
26b15dad 2423
7b67c857 2424 p = nlmsg_data(nlh);
0603eac0 2425 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2426 struct nlattr *attr;
2427
7b67c857 2428 id = nlmsg_data(nlh);
0603eac0
HX		 2429 memset(id, 0, sizeof(*id));
2430 id->dir = dir;
2431 if (c->data.byid)
2432 id->index = xp->index;
2433 else
2434 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2435
c0144bea
TG		 2436 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2437 if (attr == NULL)
2438 goto nlmsg_failure;
2439
2440 p = nla_data(attr);
0603eac0 2441 }
26b15dad 2442
26b15dad
JHS		 2443 copy_to_user_policy(xp, p, dir);
2444 if (copy_to_user_tmpl(xp, skb) < 0)
2445 goto nlmsg_failure;
1459bb36 2446 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2447 goto nlmsg_failure;
26b15dad 2448
9825069d 2449 nlmsg_end(skb, nlh);
26b15dad 2450
a6483b79 2451 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2452
2453nlmsg_failure:
2454 kfree_skb(skb);
2455 return -1;
2456}
2457
2458static int xfrm_notify_policy_flush(struct km_event *c)
2459{
7067802e 2460 struct net *net = c->net;
26b15dad
JHS		 2461 struct nlmsghdr *nlh;
2462 struct sk_buff *skb;
26b15dad 2463
7deb2264 2464 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2465 if (skb == NULL)
2466 return -ENOMEM;
26b15dad 2467
79b8b7f4
TG		 2468 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2469 if (nlh == NULL)
2470 goto nlmsg_failure;
0c51f53c
JHS		 2471 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2472 goto nlmsg_failure;
26b15dad 2473
9825069d 2474 nlmsg_end(skb, nlh);
26b15dad 2475
a6483b79 2476 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2477
2478nlmsg_failure:
2479 kfree_skb(skb);
2480 return -1;
2481}
2482
2483static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2484{
2485
2486 switch (c->event) {
f60f6b8f
HX		 2487 case XFRM_MSG_NEWPOLICY:
2488 case XFRM_MSG_UPDPOLICY:
2489 case XFRM_MSG_DELPOLICY:
26b15dad 2490 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2491 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2492 return xfrm_notify_policy_flush(c);
f60f6b8f 2493 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2494 return xfrm_exp_policy_notify(xp, dir, c);
2495 default:
2496 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2497 }
2498
2499 return 0;
2500
2501}
2502
7deb2264
TG		 2503static inline size_t xfrm_report_msgsize(void)
2504{
2505 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2506}
2507
97a64b45
MN		 2508static int build_report(struct sk_buff *skb, u8 proto,
2509 struct xfrm_selector *sel, xfrm_address_t *addr)
2510{
2511 struct xfrm_user_report *ur;
2512 struct nlmsghdr *nlh;
97a64b45 2513
79b8b7f4
TG		 2514 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2515 if (nlh == NULL)
2516 return -EMSGSIZE;
97a64b45 2517
7b67c857 2518 ur = nlmsg_data(nlh);
97a64b45
MN		 2519 ur->proto = proto;
2520 memcpy(&ur->sel, sel, sizeof(ur->sel));
2521
2522 if (addr)
c0144bea 2523 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
97a64b45 2524
9825069d 2525 return nlmsg_end(skb, nlh);
97a64b45 2526
c0144bea 2527nla_put_failure:
9825069d
TG		 2528 nlmsg_cancel(skb, nlh);
2529 return -EMSGSIZE;
97a64b45
MN		 2530}
2531
db983c11
AD		 2532static int xfrm_send_report(struct net *net, u8 proto,
2533 struct xfrm_selector *sel, xfrm_address_t *addr)
97a64b45
MN		 2534{
2535 struct sk_buff *skb;
97a64b45 2536
7deb2264 2537 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2538 if (skb == NULL)
2539 return -ENOMEM;
2540
2541 if (build_report(skb, proto, sel, addr) < 0)
2542 BUG();
2543
a6483b79 2544 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2545}
2546
3a2dfbe8
MW		 2547static inline size_t xfrm_mapping_msgsize(void)
2548{
2549 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2550}
2551
2552static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2553 xfrm_address_t *new_saddr, __be16 new_sport)
2554{
2555 struct xfrm_user_mapping *um;
2556 struct nlmsghdr *nlh;
2557
2558 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2559 if (nlh == NULL)
2560 return -EMSGSIZE;
2561
2562 um = nlmsg_data(nlh);
2563
2564 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2565 um->id.spi = x->id.spi;
2566 um->id.family = x->props.family;
2567 um->id.proto = x->id.proto;
2568 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2569 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2570 um->new_sport = new_sport;
2571 um->old_sport = x->encap->encap_sport;
2572 um->reqid = x->props.reqid;
2573
2574 return nlmsg_end(skb, nlh);
2575}
2576
2577static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2578 __be16 sport)
2579{
a6483b79 2580 struct net *net = xs_net(x);
3a2dfbe8
MW		 2581 struct sk_buff *skb;
2582
2583 if (x->id.proto != IPPROTO_ESP)
2584 return -EINVAL;
2585
2586 if (!x->encap)
2587 return -EINVAL;
2588
2589 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2590 if (skb == NULL)
2591 return -ENOMEM;
2592
2593 if (build_mapping(skb, x, ipaddr, sport) < 0)
2594 BUG();
2595
a6483b79 2596 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2597}
2598
1da177e4
LT		 2599static struct xfrm_mgr netlink_mgr = {
2600 .id = "netlink",
2601 .notify = xfrm_send_state_notify,
2602 .acquire = xfrm_send_acquire,
2603 .compile_policy = xfrm_compile_policy,
2604 .notify_policy = xfrm_send_policy_notify,
97a64b45 2605 .report = xfrm_send_report,
5c79de6e 2606 .migrate = xfrm_send_migrate,
3a2dfbe8 2607 .new_mapping = xfrm_send_mapping,
1da177e4
LT		 2608};
2609
a6483b79 2610static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 2611{
be33690d
PM		 2612 struct sock *nlsk;
2613
a6483b79 2614 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
af65bdfc 2615 xfrm_netlink_rcv, NULL, THIS_MODULE);
be33690d 2616 if (nlsk == NULL)
1da177e4 2617 return -ENOMEM;
a6483b79 2618 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 2619 return 0;
2620}
2621
a6483b79 2622static void __net_exit xfrm_user_net_exit(struct net *net)
1da177e4 2623{
a6483b79 2624 struct sock *nlsk = net->xfrm.nlsk;
be33690d 2625
a6483b79 2626 rcu_assign_pointer(net->xfrm.nlsk, NULL);
be33690d 2627 synchronize_rcu();
b7c6ba6e 2628 netlink_kernel_release(nlsk);
1da177e4
LT		 2629}
2630
a6483b79
AD		 2631static struct pernet_operations xfrm_user_net_ops = {
2632 .init = xfrm_user_net_init,
2633 .exit = xfrm_user_net_exit,
2634};
2635
2636static int __init xfrm_user_init(void)
2637{
2638 int rv;
2639
2640 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2641
2642 rv = register_pernet_subsys(&xfrm_user_net_ops);
2643 if (rv < 0)
2644 return rv;
2645 rv = xfrm_register_km(&netlink_mgr);
2646 if (rv < 0)
2647 unregister_pernet_subsys(&xfrm_user_net_ops);
2648 return rv;
2649}
2650
2651static void __exit xfrm_user_exit(void)
2652{
2653 xfrm_unregister_km(&netlink_mgr);
2654 unregister_pernet_subsys(&xfrm_user_net_ops);
2655}
2656
1da177e4
LT		 2657module_init(xfrm_user_init);
2658module_exit(xfrm_user_exit);
2659MODULE_LICENSE("GPL");
4fdb3bb7 2660MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 2661
Linux kernel - Deliverables
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