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netns xfrm: per-netns NETLINK_XFRM socket
[linux-2.6-block.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
1da177e4 29#include <asm/uaccess.h>
e23c7194
MN		 30#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
31#include <linux/in6.h>
32#endif
1da177e4 33
1a6509d9
HX		 34static inline int aead_len(struct xfrm_algo_aead *alg)
35{
36 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
37}
38
5424f32e 39static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 40{
5424f32e 41 struct nlattr *rt = attrs[type];
1da177e4
LT		 42 struct xfrm_algo *algp;
43
44 if (!rt)
45 return 0;
46
5424f32e 47 algp = nla_data(rt);
0f99be0d 48 if (nla_len(rt) < xfrm_alg_len(algp))
31c26852
HX		 49 return -EINVAL;
50
1da177e4
LT		 51 switch (type) {
52 case XFRMA_ALG_AUTH:
1da177e4 53 case XFRMA_ALG_CRYPT:
1da177e4 54 case XFRMA_ALG_COMP:
1da177e4
LT		 55 break;
56
57 default:
58 return -EINVAL;
3ff50b79 59 }
1da177e4
LT		 60
61 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
62 return 0;
63}
64
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
1da177e4 319static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
5424f32e 320 struct nlattr **attrs,
1da177e4
LT		 321 int *errp)
322{
673c09be 323 struct xfrm_state *x = xfrm_state_alloc(&init_net);
1da177e4
LT		 324 int err = -ENOMEM;
325
326 if (!x)
327 goto error_no_put;
328
329 copy_from_user_state(x, p);
330
1a6509d9
HX		 331 if ((err = attach_aead(&x->aead, &x->props.ealgo,
332 attrs[XFRMA_ALG_AEAD])))
333 goto error;
1da177e4
LT		 334 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
335 xfrm_aalg_get_byname,
35a7aa08 336 attrs[XFRMA_ALG_AUTH])))
1da177e4
LT		 337 goto error;
338 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
339 xfrm_ealg_get_byname,
35a7aa08 340 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 341 goto error;
342 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
343 xfrm_calg_get_byname,
35a7aa08 344 attrs[XFRMA_ALG_COMP])))
1da177e4 345 goto error;
fd21150a
TG		 346
347 if (attrs[XFRMA_ENCAP]) {
348 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
349 sizeof(*x->encap), GFP_KERNEL);
350 if (x->encap == NULL)
351 goto error;
352 }
353
354 if (attrs[XFRMA_COADDR]) {
355 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
356 sizeof(*x->coaddr), GFP_KERNEL);
357 if (x->coaddr == NULL)
358 goto error;
359 }
360
72cb6962 361 err = xfrm_init_state(x);
1da177e4
LT		 362 if (err)
363 goto error;
364
fd21150a
TG		 365 if (attrs[XFRMA_SEC_CTX] &&
366 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 367 goto error;
368
1da177e4 369 x->km.seq = p->seq;
d51d081d
JHS		 370 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
371 /* sysctl_xfrm_aevent_etime is in 100ms units */
372 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
373 x->preplay.bitmap = 0;
374 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
375 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
376
377 /* override default values from above */
378
5424f32e 379 xfrm_update_ae_params(x, attrs);
1da177e4
LT		 380
381 return x;
382
383error:
384 x->km.state = XFRM_STATE_DEAD;
385 xfrm_state_put(x);
386error_no_put:
387 *errp = err;
388 return NULL;
389}
390
22e70050 391static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 392 struct nlattr **attrs)
1da177e4 393{
7b67c857 394 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 395 struct xfrm_state *x;
396 int err;
26b15dad 397 struct km_event c;
2532386f
EP		 398 uid_t loginuid = NETLINK_CB(skb).loginuid;
399 u32 sessionid = NETLINK_CB(skb).sessionid;
400 u32 sid = NETLINK_CB(skb).sid;
1da177e4 401
35a7aa08 402 err = verify_newsa_info(p, attrs);
1da177e4
LT		 403 if (err)
404 return err;
405
35a7aa08 406 x = xfrm_state_construct(p, attrs, &err);
1da177e4
LT		 407 if (!x)
408 return err;
409
26b15dad 410 xfrm_state_hold(x);
1da177e4
LT		 411 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
412 err = xfrm_state_add(x);
413 else
414 err = xfrm_state_update(x);
415
2532386f 416 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 417
1da177e4
LT		 418 if (err < 0) {
419 x->km.state = XFRM_STATE_DEAD;
21380b81 420 __xfrm_state_put(x);
7d6dfe1f 421 goto out;
1da177e4
LT		 422 }
423
26b15dad
JHS		 424 c.seq = nlh->nlmsg_seq;
425 c.pid = nlh->nlmsg_pid;
f60f6b8f 426 c.event = nlh->nlmsg_type;
26b15dad
JHS		 427
428 km_state_notify(x, &c);
7d6dfe1f 429out:
26b15dad 430 xfrm_state_put(x);
1da177e4
LT		 431 return err;
432}
433
eb2971b6 434static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
5424f32e 435 struct nlattr **attrs,
eb2971b6
MN		 436 int *errp)
437{
438 struct xfrm_state *x = NULL;
439 int err;
440
441 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
442 err = -ESRCH;
221df1ed 443 x = xfrm_state_lookup(&init_net, &p->daddr, p->spi, p->proto, p->family);
eb2971b6
MN		 444 } else {
445 xfrm_address_t *saddr = NULL;
446
35a7aa08 447 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 448 if (!saddr) {
449 err = -EINVAL;
450 goto out;
451 }
452
9abbffee 453 err = -ESRCH;
221df1ed
AD		 454 x = xfrm_state_lookup_byaddr(&init_net, &p->daddr, saddr,
455 p->proto, p->family);
eb2971b6
MN		 456 }
457
458 out:
459 if (!x && errp)
460 *errp = err;
461 return x;
462}
463
22e70050 464static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 465 struct nlattr **attrs)
1da177e4
LT		 466{
467 struct xfrm_state *x;
eb2971b6 468 int err = -ESRCH;
26b15dad 469 struct km_event c;
7b67c857 470 struct xfrm_usersa_id *p = nlmsg_data(nlh);
2532386f
EP		 471 uid_t loginuid = NETLINK_CB(skb).loginuid;
472 u32 sessionid = NETLINK_CB(skb).sessionid;
473 u32 sid = NETLINK_CB(skb).sid;
1da177e4 474
35a7aa08 475 x = xfrm_user_state_lookup(p, attrs, &err);
1da177e4 476 if (x == NULL)
eb2971b6 477 return err;
1da177e4 478
6f68dc37 479 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 480 goto out;
481
1da177e4 482 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 483 err = -EPERM;
484 goto out;
1da177e4
LT		 485 }
486
26b15dad 487 err = xfrm_state_delete(x);
161a09e7 488
c8c05a8e
CZ		 489 if (err < 0)
490 goto out;
26b15dad
JHS		 491
492 c.seq = nlh->nlmsg_seq;
493 c.pid = nlh->nlmsg_pid;
f60f6b8f 494 c.event = nlh->nlmsg_type;
26b15dad 495 km_state_notify(x, &c);
1da177e4 496
c8c05a8e 497out:
2532386f 498 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
c8c05a8e 499 xfrm_state_put(x);
26b15dad 500 return err;
1da177e4
LT		 501}
502
503static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
504{
505 memcpy(&p->id, &x->id, sizeof(p->id));
506 memcpy(&p->sel, &x->sel, sizeof(p->sel));
507 memcpy(&p->lft, &x->lft, sizeof(p->lft));
508 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
509 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 510 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 511 p->mode = x->props.mode;
512 p->replay_window = x->props.replay_window;
513 p->reqid = x->props.reqid;
514 p->family = x->props.family;
515 p->flags = x->props.flags;
516 p->seq = x->km.seq;
517}
518
519struct xfrm_dump_info {
520 struct sk_buff *in_skb;
521 struct sk_buff *out_skb;
522 u32 nlmsg_seq;
523 u16 nlmsg_flags;
1da177e4
LT		 524};
525
c0144bea
TG		 526static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
527{
c0144bea
TG		 528 struct xfrm_user_sec_ctx *uctx;
529 struct nlattr *attr;
68325d3b 530 int ctx_size = sizeof(*uctx) + s->ctx_len;
c0144bea
TG		 531
532 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
533 if (attr == NULL)
534 return -EMSGSIZE;
535
536 uctx = nla_data(attr);
537 uctx->exttype = XFRMA_SEC_CTX;
538 uctx->len = ctx_size;
539 uctx->ctx_doi = s->ctx_doi;
540 uctx->ctx_alg = s->ctx_alg;
541 uctx->ctx_len = s->ctx_len;
542 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
543
544 return 0;
545}
546
68325d3b
HX		 547/* Don't change this without updating xfrm_sa_len! */
548static int copy_to_user_state_extra(struct xfrm_state *x,
549 struct xfrm_usersa_info *p,
550 struct sk_buff *skb)
1da177e4 551{
1da177e4
LT		 552 copy_to_user_state(x, p);
553
050f009e
HX		 554 if (x->coaddr)
555 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
556
557 if (x->lastused)
558 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
050f009e 559
1a6509d9
HX		 560 if (x->aead)
561 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
1da177e4 562 if (x->aalg)
0f99be0d 563 NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg);
1da177e4 564 if (x->ealg)
0f99be0d 565 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
1da177e4 566 if (x->calg)
c0144bea 567 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1da177e4
LT		 568
569 if (x->encap)
c0144bea 570 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1da177e4 571
c0144bea
TG		 572 if (x->security && copy_sec_ctx(x->security, skb) < 0)
573 goto nla_put_failure;
060f02a3 574
68325d3b
HX		 575 return 0;
576
577nla_put_failure:
578 return -EMSGSIZE;
579}
580
581static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
582{
583 struct xfrm_dump_info *sp = ptr;
584 struct sk_buff *in_skb = sp->in_skb;
585 struct sk_buff *skb = sp->out_skb;
586 struct xfrm_usersa_info *p;
587 struct nlmsghdr *nlh;
588 int err;
589
68325d3b
HX		 590 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
591 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
592 if (nlh == NULL)
593 return -EMSGSIZE;
594
595 p = nlmsg_data(nlh);
596
597 err = copy_to_user_state_extra(x, p, skb);
598 if (err)
599 goto nla_put_failure;
600
9825069d 601 nlmsg_end(skb, nlh);
1da177e4
LT		 602 return 0;
603
c0144bea 604nla_put_failure:
9825069d 605 nlmsg_cancel(skb, nlh);
68325d3b 606 return err;
1da177e4
LT		 607}
608
4c563f76
TT		 609static int xfrm_dump_sa_done(struct netlink_callback *cb)
610{
611 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
612 xfrm_state_walk_done(walk);
613 return 0;
614}
615
1da177e4
LT		 616static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
617{
4c563f76 618 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
1da177e4
LT		 619 struct xfrm_dump_info info;
620
4c563f76
TT		 621 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
622 sizeof(cb->args) - sizeof(cb->args[0]));
623
1da177e4
LT		 624 info.in_skb = cb->skb;
625 info.out_skb = skb;
626 info.nlmsg_seq = cb->nlh->nlmsg_seq;
627 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 628
629 if (!cb->args[0]) {
630 cb->args[0] = 1;
631 xfrm_state_walk_init(walk, 0);
632 }
633
284fa7da 634 (void) xfrm_state_walk(&init_net, walk, dump_one_state, &info);
1da177e4
LT		 635
636 return skb->len;
637}
638
639static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
640 struct xfrm_state *x, u32 seq)
641{
642 struct xfrm_dump_info info;
643 struct sk_buff *skb;
644
7deb2264 645 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 646 if (!skb)
647 return ERR_PTR(-ENOMEM);
648
1da177e4
LT		 649 info.in_skb = in_skb;
650 info.out_skb = skb;
651 info.nlmsg_seq = seq;
652 info.nlmsg_flags = 0;
1da177e4
LT		 653
654 if (dump_one_state(x, 0, &info)) {
655 kfree_skb(skb);
656 return NULL;
657 }
658
659 return skb;
660}
661
7deb2264
TG		 662static inline size_t xfrm_spdinfo_msgsize(void)
663{
664 return NLMSG_ALIGN(4)
665 + nla_total_size(sizeof(struct xfrmu_spdinfo))
666 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
667}
668
ecfd6b18
JHS		 669static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
670{
5a6d3416
JHS		 671 struct xfrmk_spdinfo si;
672 struct xfrmu_spdinfo spc;
673 struct xfrmu_spdhinfo sph;
ecfd6b18
JHS		 674 struct nlmsghdr *nlh;
675 u32 *f;
676
677 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
678 if (nlh == NULL) /* shouldnt really happen ... */
679 return -EMSGSIZE;
680
681 f = nlmsg_data(nlh);
682 *f = flags;
683 xfrm_spd_getinfo(&si);
5a6d3416
JHS		 684 spc.incnt = si.incnt;
685 spc.outcnt = si.outcnt;
686 spc.fwdcnt = si.fwdcnt;
687 spc.inscnt = si.inscnt;
688 spc.outscnt = si.outscnt;
689 spc.fwdscnt = si.fwdscnt;
690 sph.spdhcnt = si.spdhcnt;
691 sph.spdhmcnt = si.spdhmcnt;
692
693 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
694 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
ecfd6b18
JHS		 695
696 return nlmsg_end(skb, nlh);
697
698nla_put_failure:
699 nlmsg_cancel(skb, nlh);
700 return -EMSGSIZE;
701}
702
703static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 704 struct nlattr **attrs)
ecfd6b18 705{
a6483b79 706 struct net *net = sock_net(skb->sk);
ecfd6b18 707 struct sk_buff *r_skb;
7b67c857 708 u32 *flags = nlmsg_data(nlh);
ecfd6b18
JHS		 709 u32 spid = NETLINK_CB(skb).pid;
710 u32 seq = nlh->nlmsg_seq;
ecfd6b18 711
7deb2264 712 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 713 if (r_skb == NULL)
714 return -ENOMEM;
715
716 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
717 BUG();
718
a6483b79 719 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
ecfd6b18
JHS		 720}
721
7deb2264
TG		 722static inline size_t xfrm_sadinfo_msgsize(void)
723{
724 return NLMSG_ALIGN(4)
725 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
726 + nla_total_size(4); /* XFRMA_SAD_CNT */
727}
728
28d8909b
JHS		 729static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
730{
af11e316
JHS		 731 struct xfrmk_sadinfo si;
732 struct xfrmu_sadhinfo sh;
28d8909b
JHS		 733 struct nlmsghdr *nlh;
734 u32 *f;
735
736 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
737 if (nlh == NULL) /* shouldnt really happen ... */
738 return -EMSGSIZE;
739
740 f = nlmsg_data(nlh);
741 *f = flags;
742 xfrm_sad_getinfo(&si);
743
af11e316
JHS		 744 sh.sadhmcnt = si.sadhmcnt;
745 sh.sadhcnt = si.sadhcnt;
746
747 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
748 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
28d8909b
JHS		 749
750 return nlmsg_end(skb, nlh);
751
752nla_put_failure:
753 nlmsg_cancel(skb, nlh);
754 return -EMSGSIZE;
755}
756
757static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 758 struct nlattr **attrs)
28d8909b 759{
a6483b79 760 struct net *net = sock_net(skb->sk);
28d8909b 761 struct sk_buff *r_skb;
7b67c857 762 u32 *flags = nlmsg_data(nlh);
28d8909b
JHS		 763 u32 spid = NETLINK_CB(skb).pid;
764 u32 seq = nlh->nlmsg_seq;
28d8909b 765
7deb2264 766 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 767 if (r_skb == NULL)
768 return -ENOMEM;
769
770 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
771 BUG();
772
a6483b79 773 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
28d8909b
JHS		 774}
775
22e70050 776static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 777 struct nlattr **attrs)
1da177e4 778{
a6483b79 779 struct net *net = &init_net;
7b67c857 780 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 781 struct xfrm_state *x;
782 struct sk_buff *resp_skb;
eb2971b6 783 int err = -ESRCH;
1da177e4 784
35a7aa08 785 x = xfrm_user_state_lookup(p, attrs, &err);
1da177e4
LT		 786 if (x == NULL)
787 goto out_noput;
788
789 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
790 if (IS_ERR(resp_skb)) {
791 err = PTR_ERR(resp_skb);
792 } else {
a6483b79 793 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 794 }
795 xfrm_state_put(x);
796out_noput:
797 return err;
798}
799
800static int verify_userspi_info(struct xfrm_userspi_info *p)
801{
802 switch (p->info.id.proto) {
803 case IPPROTO_AH:
804 case IPPROTO_ESP:
805 break;
806
807 case IPPROTO_COMP:
808 /* IPCOMP spi is 16-bits. */
809 if (p->max >= 0x10000)
810 return -EINVAL;
811 break;
812
813 default:
814 return -EINVAL;
3ff50b79 815 }
1da177e4
LT		 816
817 if (p->min > p->max)
818 return -EINVAL;
819
820 return 0;
821}
822
22e70050 823static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 824 struct nlattr **attrs)
1da177e4 825{
a6483b79 826 struct net *net = &init_net;
1da177e4
LT		 827 struct xfrm_state *x;
828 struct xfrm_userspi_info *p;
829 struct sk_buff *resp_skb;
830 xfrm_address_t *daddr;
831 int family;
832 int err;
833
7b67c857 834 p = nlmsg_data(nlh);
1da177e4
LT		 835 err = verify_userspi_info(p);
836 if (err)
837 goto out_noput;
838
839 family = p->info.family;
840 daddr = &p->info.id.daddr;
841
842 x = NULL;
843 if (p->info.seq) {
a6483b79 844 x = xfrm_find_acq_byseq(net, p->info.seq);
1da177e4
LT		 845 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
846 xfrm_state_put(x);
847 x = NULL;
848 }
849 }
850
851 if (!x)
a6483b79 852 x = xfrm_find_acq(net, p->info.mode, p->info.reqid,
1da177e4
LT		 853 p->info.id.proto, daddr,
854 &p->info.saddr, 1,
855 family);
856 err = -ENOENT;
857 if (x == NULL)
858 goto out_noput;
859
658b219e
HX		 860 err = xfrm_alloc_spi(x, p->min, p->max);
861 if (err)
862 goto out;
1da177e4 863
658b219e 864 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1da177e4
LT		 865 if (IS_ERR(resp_skb)) {
866 err = PTR_ERR(resp_skb);
867 goto out;
868 }
869
a6483b79 870 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 871
872out:
873 xfrm_state_put(x);
874out_noput:
875 return err;
876}
877
b798a9ed 878static int verify_policy_dir(u8 dir)
1da177e4
LT		 879{
880 switch (dir) {
881 case XFRM_POLICY_IN:
882 case XFRM_POLICY_OUT:
883 case XFRM_POLICY_FWD:
884 break;
885
886 default:
887 return -EINVAL;
3ff50b79 888 }
1da177e4
LT		 889
890 return 0;
891}
892
b798a9ed 893static int verify_policy_type(u8 type)
f7b6983f
MN		 894{
895 switch (type) {
896 case XFRM_POLICY_TYPE_MAIN:
897#ifdef CONFIG_XFRM_SUB_POLICY
898 case XFRM_POLICY_TYPE_SUB:
899#endif
900 break;
901
902 default:
903 return -EINVAL;
3ff50b79 904 }
f7b6983f
MN		 905
906 return 0;
907}
908
1da177e4
LT		 909static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
910{
911 switch (p->share) {
912 case XFRM_SHARE_ANY:
913 case XFRM_SHARE_SESSION:
914 case XFRM_SHARE_USER:
915 case XFRM_SHARE_UNIQUE:
916 break;
917
918 default:
919 return -EINVAL;
3ff50b79 920 }
1da177e4
LT		 921
922 switch (p->action) {
923 case XFRM_POLICY_ALLOW:
924 case XFRM_POLICY_BLOCK:
925 break;
926
927 default:
928 return -EINVAL;
3ff50b79 929 }
1da177e4
LT		 930
931 switch (p->sel.family) {
932 case AF_INET:
933 break;
934
935 case AF_INET6:
936#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
937 break;
938#else
939 return -EAFNOSUPPORT;
940#endif
941
942 default:
943 return -EINVAL;
3ff50b79 944 }
1da177e4
LT		 945
946 return verify_policy_dir(p->dir);
947}
948
5424f32e 949static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 950{
5424f32e 951 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 952 struct xfrm_user_sec_ctx *uctx;
953
954 if (!rt)
955 return 0;
956
5424f32e 957 uctx = nla_data(rt);
03e1ad7b 958 return security_xfrm_policy_alloc(&pol->security, uctx);
df71837d
TJ		 959}
960
1da177e4
LT		 961static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
962 int nr)
963{
964 int i;
965
966 xp->xfrm_nr = nr;
967 for (i = 0; i < nr; i++, ut++) {
968 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
969
970 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
971 memcpy(&t->saddr, &ut->saddr,
972 sizeof(xfrm_address_t));
973 t->reqid = ut->reqid;
974 t->mode = ut->mode;
975 t->share = ut->share;
976 t->optional = ut->optional;
977 t->aalgos = ut->aalgos;
978 t->ealgos = ut->ealgos;
979 t->calgos = ut->calgos;
c5d18e98
HX		 980 /* If all masks are ~0, then we allow all algorithms. */
981 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
8511d01d 982 t->encap_family = ut->family;
1da177e4
LT		 983 }
984}
985
b4ad86bf
DM		 986static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
987{
988 int i;
989
990 if (nr > XFRM_MAX_DEPTH)
991 return -EINVAL;
992
993 for (i = 0; i < nr; i++) {
994 /* We never validated the ut->family value, so many
995 * applications simply leave it at zero. The check was
996 * never made and ut->family was ignored because all
997 * templates could be assumed to have the same family as
998 * the policy itself. Now that we will have ipv4-in-ipv6
999 * and ipv6-in-ipv4 tunnels, this is no longer true.
1000 */
1001 if (!ut[i].family)
1002 ut[i].family = family;
1003
1004 switch (ut[i].family) {
1005 case AF_INET:
1006 break;
1007#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1008 case AF_INET6:
1009 break;
1010#endif
1011 default:
1012 return -EINVAL;
3ff50b79 1013 }
b4ad86bf
DM		 1014 }
1015
1016 return 0;
1017}
1018
5424f32e 1019static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 1020{
5424f32e 1021 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 1022
1023 if (!rt) {
1024 pol->xfrm_nr = 0;
1025 } else {
5424f32e
TG		 1026 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1027 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 1028 int err;
1da177e4 1029
b4ad86bf
DM		 1030 err = validate_tmpl(nr, utmpl, pol->family);
1031 if (err)
1032 return err;
1da177e4 1033
5424f32e 1034 copy_templates(pol, utmpl, nr);
1da177e4
LT		 1035 }
1036 return 0;
1037}
1038
5424f32e 1039static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 1040{
5424f32e 1041 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1042 struct xfrm_userpolicy_type *upt;
b798a9ed 1043 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1044 int err;
1045
1046 if (rt) {
5424f32e 1047 upt = nla_data(rt);
f7b6983f
MN		 1048 type = upt->type;
1049 }
1050
1051 err = verify_policy_type(type);
1052 if (err)
1053 return err;
1054
1055 *tp = type;
1056 return 0;
1057}
1058
1da177e4
LT		 1059static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1060{
1061 xp->priority = p->priority;
1062 xp->index = p->index;
1063 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1064 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1065 xp->action = p->action;
1066 xp->flags = p->flags;
1067 xp->family = p->sel.family;
1068 /* XXX xp->share = p->share; */
1069}
1070
1071static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1072{
1073 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1074 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1075 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1076 p->priority = xp->priority;
1077 p->index = xp->index;
1078 p->sel.family = xp->family;
1079 p->dir = dir;
1080 p->action = xp->action;
1081 p->flags = xp->flags;
1082 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1083}
1084
5424f32e 1085static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4 1086{
0331b1f3 1087 struct xfrm_policy *xp = xfrm_policy_alloc(&init_net, GFP_KERNEL);
1da177e4
LT		 1088 int err;
1089
1090 if (!xp) {
1091 *errp = -ENOMEM;
1092 return NULL;
1093 }
1094
1095 copy_from_user_policy(xp, p);
df71837d 1096
35a7aa08 1097 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1098 if (err)
1099 goto error;
1100
35a7aa08
TG		 1101 if (!(err = copy_from_user_tmpl(xp, attrs)))
1102 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1103 if (err)
1104 goto error;
1da177e4
LT		 1105
1106 return xp;
f7b6983f
MN		 1107 error:
1108 *errp = err;
12a169e7 1109 xp->walk.dead = 1;
64c31b3f 1110 xfrm_policy_destroy(xp);
f7b6983f 1111 return NULL;
1da177e4
LT		 1112}
1113
22e70050 1114static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1115 struct nlattr **attrs)
1da177e4 1116{
7b67c857 1117 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1118 struct xfrm_policy *xp;
26b15dad 1119 struct km_event c;
1da177e4
LT		 1120 int err;
1121 int excl;
2532386f
EP		 1122 uid_t loginuid = NETLINK_CB(skb).loginuid;
1123 u32 sessionid = NETLINK_CB(skb).sessionid;
1124 u32 sid = NETLINK_CB(skb).sid;
1da177e4
LT		 1125
1126 err = verify_newpolicy_info(p);
df71837d
TJ		 1127 if (err)
1128 return err;
35a7aa08 1129 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1130 if (err)
1131 return err;
1132
35a7aa08 1133 xp = xfrm_policy_construct(p, attrs, &err);
1da177e4
LT		 1134 if (!xp)
1135 return err;
1136
26b15dad
JHS		 1137 /* shouldnt excl be based on nlh flags??
1138 * Aha! this is anti-netlink really i.e more pfkey derived
1139 * in netlink excl is a flag and you wouldnt need
1140 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1141 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1142 err = xfrm_policy_insert(p->dir, xp, excl);
2532386f 1143 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
161a09e7 1144
1da177e4 1145 if (err) {
03e1ad7b 1146 security_xfrm_policy_free(xp->security);
1da177e4
LT		 1147 kfree(xp);
1148 return err;
1149 }
1150
f60f6b8f 1151 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1152 c.seq = nlh->nlmsg_seq;
1153 c.pid = nlh->nlmsg_pid;
1154 km_policy_notify(xp, p->dir, &c);
1155
1da177e4
LT		 1156 xfrm_pol_put(xp);
1157
1158 return 0;
1159}
1160
1161static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1162{
1163 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1164 int i;
1165
1166 if (xp->xfrm_nr == 0)
1167 return 0;
1168
1169 for (i = 0; i < xp->xfrm_nr; i++) {
1170 struct xfrm_user_tmpl *up = &vec[i];
1171 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1172
1173 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1174 up->family = kp->encap_family;
1da177e4
LT		 1175 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1176 up->reqid = kp->reqid;
1177 up->mode = kp->mode;
1178 up->share = kp->share;
1179 up->optional = kp->optional;
1180 up->aalgos = kp->aalgos;
1181 up->ealgos = kp->ealgos;
1182 up->calgos = kp->calgos;
1183 }
df71837d 1184
c0144bea
TG		 1185 return nla_put(skb, XFRMA_TMPL,
1186 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1187}
1188
1189static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1190{
1191 if (x->security) {
1192 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1193 }
1194 return 0;
0d681623 1195}
df71837d 1196
0d681623
SH		 1197static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1198{
1199 if (xp->security) {
1200 return copy_sec_ctx(xp->security, skb);
1201 }
1202 return 0;
df71837d 1203}
cfbfd45a
TG		 1204static inline size_t userpolicy_type_attrsize(void)
1205{
1206#ifdef CONFIG_XFRM_SUB_POLICY
1207 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1208#else
1209 return 0;
1210#endif
1211}
df71837d 1212
f7b6983f 1213#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1214static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1215{
c0144bea
TG		 1216 struct xfrm_userpolicy_type upt = {
1217 .type = type,
1218 };
f7b6983f 1219
c0144bea 1220 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1221}
1222
1223#else
b798a9ed 1224static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1225{
1226 return 0;
1227}
1228#endif
1229
1da177e4
LT		 1230static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1231{
1232 struct xfrm_dump_info *sp = ptr;
1233 struct xfrm_userpolicy_info *p;
1234 struct sk_buff *in_skb = sp->in_skb;
1235 struct sk_buff *skb = sp->out_skb;
1236 struct nlmsghdr *nlh;
1da177e4 1237
79b8b7f4
TG		 1238 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1239 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1240 if (nlh == NULL)
1241 return -EMSGSIZE;
1da177e4 1242
7b67c857 1243 p = nlmsg_data(nlh);
1da177e4
LT		 1244 copy_to_user_policy(xp, p, dir);
1245 if (copy_to_user_tmpl(xp, skb) < 0)
1246 goto nlmsg_failure;
df71837d
TJ		 1247 if (copy_to_user_sec_ctx(xp, skb))
1248 goto nlmsg_failure;
1459bb36 1249 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 1250 goto nlmsg_failure;
1da177e4 1251
9825069d 1252 nlmsg_end(skb, nlh);
1da177e4
LT		 1253 return 0;
1254
1255nlmsg_failure:
9825069d
TG		 1256 nlmsg_cancel(skb, nlh);
1257 return -EMSGSIZE;
1da177e4
LT		 1258}
1259
4c563f76
TT		 1260static int xfrm_dump_policy_done(struct netlink_callback *cb)
1261{
1262 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1263
1264 xfrm_policy_walk_done(walk);
1265 return 0;
1266}
1267
1da177e4
LT		 1268static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1269{
4c563f76 1270 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1da177e4
LT		 1271 struct xfrm_dump_info info;
1272
4c563f76
TT		 1273 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1274 sizeof(cb->args) - sizeof(cb->args[0]));
1275
1da177e4
LT		 1276 info.in_skb = cb->skb;
1277 info.out_skb = skb;
1278 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1279 info.nlmsg_flags = NLM_F_MULTI;
4c563f76
TT		 1280
1281 if (!cb->args[0]) {
1282 cb->args[0] = 1;
1283 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1284 }
1285
cdcbca7c 1286 (void) xfrm_policy_walk(&init_net, walk, dump_one_policy, &info);
1da177e4
LT		 1287
1288 return skb->len;
1289}
1290
1291static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1292 struct xfrm_policy *xp,
1293 int dir, u32 seq)
1294{
1295 struct xfrm_dump_info info;
1296 struct sk_buff *skb;
1297
7deb2264 1298 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1299 if (!skb)
1300 return ERR_PTR(-ENOMEM);
1301
1da177e4
LT		 1302 info.in_skb = in_skb;
1303 info.out_skb = skb;
1304 info.nlmsg_seq = seq;
1305 info.nlmsg_flags = 0;
1da177e4
LT		 1306
1307 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1308 kfree_skb(skb);
1309 return NULL;
1310 }
1311
1312 return skb;
1313}
1314
22e70050 1315static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1316 struct nlattr **attrs)
1da177e4 1317{
a6483b79 1318 struct net *net = &init_net;
1da177e4
LT		 1319 struct xfrm_policy *xp;
1320 struct xfrm_userpolicy_id *p;
b798a9ed 1321 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1322 int err;
26b15dad 1323 struct km_event c;
1da177e4
LT		 1324 int delete;
1325
7b67c857 1326 p = nlmsg_data(nlh);
1da177e4
LT		 1327 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1328
35a7aa08 1329 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1330 if (err)
1331 return err;
1332
1da177e4
LT		 1333 err = verify_policy_dir(p->dir);
1334 if (err)
1335 return err;
1336
1337 if (p->index)
a6483b79 1338 xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err);
df71837d 1339 else {
5424f32e 1340 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1341 struct xfrm_sec_ctx *ctx;
df71837d 1342
35a7aa08 1343 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1344 if (err)
1345 return err;
1346
2c8dd116 1347 ctx = NULL;
df71837d 1348 if (rt) {
5424f32e 1349 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d 1350
03e1ad7b
PM		 1351 err = security_xfrm_policy_alloc(&ctx, uctx);
1352 if (err)
df71837d 1353 return err;
2c8dd116 1354 }
a6483b79 1355 xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx,
ef41aaa0 1356 delete, &err);
03e1ad7b 1357 security_xfrm_policy_free(ctx);
df71837d 1358 }
1da177e4
LT		 1359 if (xp == NULL)
1360 return -ENOENT;
1361
1362 if (!delete) {
1363 struct sk_buff *resp_skb;
1364
1365 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1366 if (IS_ERR(resp_skb)) {
1367 err = PTR_ERR(resp_skb);
1368 } else {
a6483b79 1369 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
082a1ad5 1370 NETLINK_CB(skb).pid);
1da177e4 1371 }
26b15dad 1372 } else {
2532386f
EP		 1373 uid_t loginuid = NETLINK_CB(skb).loginuid;
1374 u32 sessionid = NETLINK_CB(skb).sessionid;
1375 u32 sid = NETLINK_CB(skb).sid;
1376
1377 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1378 sid);
13fcfbb0
DM		 1379
1380 if (err != 0)
c8c05a8e 1381 goto out;
13fcfbb0 1382
e7443892 1383 c.data.byid = p->index;
f60f6b8f 1384 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1385 c.seq = nlh->nlmsg_seq;
1386 c.pid = nlh->nlmsg_pid;
1387 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1388 }
1389
c8c05a8e 1390out:
ef41aaa0 1391 xfrm_pol_put(xp);
1da177e4
LT		 1392 return err;
1393}
1394
22e70050 1395static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1396 struct nlattr **attrs)
1da177e4 1397{
26b15dad 1398 struct km_event c;
7b67c857 1399 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1400 struct xfrm_audit audit_info;
4aa2e62c 1401 int err;
1da177e4 1402
161a09e7 1403 audit_info.loginuid = NETLINK_CB(skb).loginuid;
2532386f 1404 audit_info.sessionid = NETLINK_CB(skb).sessionid;
161a09e7 1405 audit_info.secid = NETLINK_CB(skb).sid;
0e602451 1406 err = xfrm_state_flush(&init_net, p->proto, &audit_info);
4aa2e62c
JL		 1407 if (err)
1408 return err;
bf08867f 1409 c.data.proto = p->proto;
f60f6b8f 1410 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1411 c.seq = nlh->nlmsg_seq;
1412 c.pid = nlh->nlmsg_pid;
1413 km_state_notify(NULL, &c);
1414
1da177e4
LT		 1415 return 0;
1416}
1417
7deb2264
TG		 1418static inline size_t xfrm_aevent_msgsize(void)
1419{
1420 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1421 + nla_total_size(sizeof(struct xfrm_replay_state))
1422 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1423 + nla_total_size(4) /* XFRM_AE_RTHR */
1424 + nla_total_size(4); /* XFRM_AE_ETHR */
1425}
d51d081d
JHS		 1426
1427static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1428{
1429 struct xfrm_aevent_id *id;
1430 struct nlmsghdr *nlh;
d51d081d 1431
79b8b7f4
TG		 1432 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1433 if (nlh == NULL)
1434 return -EMSGSIZE;
d51d081d 1435
7b67c857 1436 id = nlmsg_data(nlh);
2b5f6dcc 1437 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1438 id->sa_id.spi = x->id.spi;
1439 id->sa_id.family = x->props.family;
1440 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1441 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1442 id->reqid = x->props.reqid;
d51d081d
JHS		 1443 id->flags = c->data.aevent;
1444
c0144bea
TG		 1445 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1446 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
d51d081d 1447
c0144bea
TG		 1448 if (id->flags & XFRM_AE_RTHR)
1449 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
d51d081d 1450
c0144bea
TG		 1451 if (id->flags & XFRM_AE_ETHR)
1452 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1453 x->replay_maxage * 10 / HZ);
d51d081d 1454
9825069d 1455 return nlmsg_end(skb, nlh);
d51d081d 1456
c0144bea 1457nla_put_failure:
9825069d
TG		 1458 nlmsg_cancel(skb, nlh);
1459 return -EMSGSIZE;
d51d081d
JHS		 1460}
1461
22e70050 1462static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1463 struct nlattr **attrs)
d51d081d 1464{
a6483b79 1465 struct net *net = &init_net;
d51d081d
JHS		 1466 struct xfrm_state *x;
1467 struct sk_buff *r_skb;
1468 int err;
1469 struct km_event c;
7b67c857 1470 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1471 struct xfrm_usersa_id *id = &p->sa_id;
1472
7deb2264 1473 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 1474 if (r_skb == NULL)
1475 return -ENOMEM;
1476
a6483b79 1477 x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family);
d51d081d 1478 if (x == NULL) {
b08d5840 1479 kfree_skb(r_skb);
d51d081d
JHS		 1480 return -ESRCH;
1481 }
1482
1483 /*
1484 * XXX: is this lock really needed - none of the other
1485 * gets lock (the concern is things getting updated
1486 * while we are still reading) - jhs
1487 */
1488 spin_lock_bh(&x->lock);
1489 c.data.aevent = p->flags;
1490 c.seq = nlh->nlmsg_seq;
1491 c.pid = nlh->nlmsg_pid;
1492
1493 if (build_aevent(r_skb, x, &c) < 0)
1494 BUG();
a6483b79 1495 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
d51d081d
JHS		 1496 spin_unlock_bh(&x->lock);
1497 xfrm_state_put(x);
1498 return err;
1499}
1500
22e70050 1501static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1502 struct nlattr **attrs)
d51d081d
JHS		 1503{
1504 struct xfrm_state *x;
1505 struct km_event c;
1506 int err = - EINVAL;
7b67c857 1507 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e
TG		 1508 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1509 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d
JHS		 1510
1511 if (!lt && !rp)
1512 return err;
1513
1514 /* pedantic mode - thou shalt sayeth replaceth */
1515 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1516 return err;
1517
221df1ed 1518 x = xfrm_state_lookup(&init_net, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
d51d081d
JHS		 1519 if (x == NULL)
1520 return -ESRCH;
1521
1522 if (x->km.state != XFRM_STATE_VALID)
1523 goto out;
1524
1525 spin_lock_bh(&x->lock);
35a7aa08 1526 xfrm_update_ae_params(x, attrs);
d51d081d 1527 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1528
1529 c.event = nlh->nlmsg_type;
1530 c.seq = nlh->nlmsg_seq;
1531 c.pid = nlh->nlmsg_pid;
1532 c.data.aevent = XFRM_AE_CU;
1533 km_state_notify(x, &c);
1534 err = 0;
1535out:
1536 xfrm_state_put(x);
1537 return err;
1538}
1539
22e70050 1540static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1541 struct nlattr **attrs)
1da177e4 1542{
f7b6983f 1543 struct km_event c;
b798a9ed 1544 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1545 int err;
161a09e7 1546 struct xfrm_audit audit_info;
f7b6983f 1547
35a7aa08 1548 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1549 if (err)
1550 return err;
26b15dad 1551
161a09e7 1552 audit_info.loginuid = NETLINK_CB(skb).loginuid;
2532386f 1553 audit_info.sessionid = NETLINK_CB(skb).sessionid;
161a09e7 1554 audit_info.secid = NETLINK_CB(skb).sid;
33ffbbd5 1555 err = xfrm_policy_flush(&init_net, type, &audit_info);
4aa2e62c
JL		 1556 if (err)
1557 return err;
f7b6983f 1558 c.data.type = type;
f60f6b8f 1559 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1560 c.seq = nlh->nlmsg_seq;
1561 c.pid = nlh->nlmsg_pid;
1562 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1563 return 0;
1564}
1565
22e70050 1566static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1567 struct nlattr **attrs)
6c5c8ca7
JHS		 1568{
1569 struct xfrm_policy *xp;
7b67c857 1570 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1571 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1572 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7
JHS		 1573 int err = -ENOENT;
1574
35a7aa08 1575 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1576 if (err)
1577 return err;
1578
6c5c8ca7 1579 if (p->index)
8d1211a6 1580 xp = xfrm_policy_byid(&init_net, type, p->dir, p->index, 0, &err);
6c5c8ca7 1581 else {
5424f32e 1582 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
03e1ad7b 1583 struct xfrm_sec_ctx *ctx;
6c5c8ca7 1584
35a7aa08 1585 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1586 if (err)
1587 return err;
1588
2c8dd116 1589 ctx = NULL;
6c5c8ca7 1590 if (rt) {
5424f32e 1591 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7 1592
03e1ad7b
PM		 1593 err = security_xfrm_policy_alloc(&ctx, uctx);
1594 if (err)
6c5c8ca7 1595 return err;
2c8dd116 1596 }
8d1211a6 1597 xp = xfrm_policy_bysel_ctx(&init_net, type, p->dir, &p->sel, ctx, 0, &err);
03e1ad7b 1598 security_xfrm_policy_free(ctx);
6c5c8ca7 1599 }
6c5c8ca7 1600 if (xp == NULL)
ef41aaa0 1601 return -ENOENT;
03e1ad7b 1602
ef41aaa0 1603 read_lock(&xp->lock);
12a169e7 1604 if (xp->walk.dead) {
6c5c8ca7
JHS		 1605 read_unlock(&xp->lock);
1606 goto out;
1607 }
1608
1609 read_unlock(&xp->lock);
1610 err = 0;
1611 if (up->hard) {
2532386f
EP		 1612 uid_t loginuid = NETLINK_CB(skb).loginuid;
1613 uid_t sessionid = NETLINK_CB(skb).sessionid;
1614 u32 sid = NETLINK_CB(skb).sid;
6c5c8ca7 1615 xfrm_policy_delete(xp, p->dir);
2532386f 1616 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
161a09e7 1617
6c5c8ca7
JHS		 1618 } else {
1619 // reset the timers here?
1620 printk("Dont know what to do with soft policy expire\n");
1621 }
1622 km_policy_expired(xp, p->dir, up->hard, current->pid);
1623
1624out:
1625 xfrm_pol_put(xp);
1626 return err;
1627}
1628
22e70050 1629static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1630 struct nlattr **attrs)
53bc6b4d
JHS		 1631{
1632 struct xfrm_state *x;
1633 int err;
7b67c857 1634 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d
JHS		 1635 struct xfrm_usersa_info *p = &ue->state;
1636
221df1ed 1637 x = xfrm_state_lookup(&init_net, &p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1638
3a765aa5 1639 err = -ENOENT;
53bc6b4d
JHS		 1640 if (x == NULL)
1641 return err;
1642
53bc6b4d 1643 spin_lock_bh(&x->lock);
3a765aa5 1644 err = -EINVAL;
53bc6b4d
JHS		 1645 if (x->km.state != XFRM_STATE_VALID)
1646 goto out;
1647 km_state_expired(x, ue->hard, current->pid);
1648
161a09e7 1649 if (ue->hard) {
2532386f
EP		 1650 uid_t loginuid = NETLINK_CB(skb).loginuid;
1651 uid_t sessionid = NETLINK_CB(skb).sessionid;
1652 u32 sid = NETLINK_CB(skb).sid;
53bc6b4d 1653 __xfrm_state_delete(x);
2532386f 1654 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
161a09e7 1655 }
3a765aa5 1656 err = 0;
53bc6b4d
JHS		 1657out:
1658 spin_unlock_bh(&x->lock);
1659 xfrm_state_put(x);
1660 return err;
1661}
1662
22e70050 1663static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1664 struct nlattr **attrs)
980ebd25
JHS		 1665{
1666 struct xfrm_policy *xp;
1667 struct xfrm_user_tmpl *ut;
1668 int i;
5424f32e 1669 struct nlattr *rt = attrs[XFRMA_TMPL];
980ebd25 1670
7b67c857 1671 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
673c09be 1672 struct xfrm_state *x = xfrm_state_alloc(&init_net);
980ebd25
JHS		 1673 int err = -ENOMEM;
1674
1675 if (!x)
1676 return err;
1677
1678 err = verify_newpolicy_info(&ua->policy);
1679 if (err) {
1680 printk("BAD policy passed\n");
1681 kfree(x);
1682 return err;
1683 }
1684
1685 /* build an XP */
5424f32e 1686 xp = xfrm_policy_construct(&ua->policy, attrs, &err);
b4ad86bf 1687 if (!xp) {
980ebd25
JHS		 1688 kfree(x);
1689 return err;
1690 }
1691
1692 memcpy(&x->id, &ua->id, sizeof(ua->id));
1693 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1694 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1695
5424f32e 1696 ut = nla_data(rt);
980ebd25
JHS		 1697 /* extract the templates and for each call km_key */
1698 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1699 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1700 memcpy(&x->id, &t->id, sizeof(x->id));
1701 x->props.mode = t->mode;
1702 x->props.reqid = t->reqid;
1703 x->props.family = ut->family;
1704 t->aalgos = ua->aalgos;
1705 t->ealgos = ua->ealgos;
1706 t->calgos = ua->calgos;
1707 err = km_query(x, t, xp);
1708
1709 }
1710
1711 kfree(x);
1712 kfree(xp);
1713
1714 return 0;
1715}
1716
5c79de6e 1717#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 1718static int copy_from_user_migrate(struct xfrm_migrate *ma,
13c1d189 1719 struct xfrm_kmaddress *k,
5424f32e 1720 struct nlattr **attrs, int *num)
5c79de6e 1721{
5424f32e 1722 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 1723 struct xfrm_user_migrate *um;
1724 int i, num_migrate;
1725
13c1d189
AE		 1726 if (k != NULL) {
1727 struct xfrm_user_kmaddress *uk;
1728
1729 uk = nla_data(attrs[XFRMA_KMADDRESS]);
1730 memcpy(&k->local, &uk->local, sizeof(k->local));
1731 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
1732 k->family = uk->family;
1733 k->reserved = uk->reserved;
1734 }
1735
5424f32e
TG		 1736 um = nla_data(rt);
1737 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 1738
1739 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1740 return -EINVAL;
1741
1742 for (i = 0; i < num_migrate; i++, um++, ma++) {
1743 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1744 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1745 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1746 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1747
1748 ma->proto = um->proto;
1749 ma->mode = um->mode;
1750 ma->reqid = um->reqid;
1751
1752 ma->old_family = um->old_family;
1753 ma->new_family = um->new_family;
1754 }
1755
1756 *num = i;
1757 return 0;
1758}
1759
1760static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1761 struct nlattr **attrs)
5c79de6e 1762{
7b67c857 1763 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e 1764 struct xfrm_migrate m[XFRM_MAX_DEPTH];
13c1d189 1765 struct xfrm_kmaddress km, *kmp;
5c79de6e
SS		 1766 u8 type;
1767 int err;
1768 int n = 0;
1769
35a7aa08 1770 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 1771 return -EINVAL;
5c79de6e 1772
13c1d189
AE		 1773 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
1774
5424f32e 1775 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 1776 if (err)
1777 return err;
1778
13c1d189 1779 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
5c79de6e
SS		 1780 if (err)
1781 return err;
1782
1783 if (!n)
1784 return 0;
1785
13c1d189 1786 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
5c79de6e
SS		 1787
1788 return 0;
1789}
1790#else
1791static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1792 struct nlattr **attrs)
5c79de6e
SS		 1793{
1794 return -ENOPROTOOPT;
1795}
1796#endif
1797
1798#ifdef CONFIG_XFRM_MIGRATE
1799static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1800{
1801 struct xfrm_user_migrate um;
1802
1803 memset(&um, 0, sizeof(um));
1804 um.proto = m->proto;
1805 um.mode = m->mode;
1806 um.reqid = m->reqid;
1807 um.old_family = m->old_family;
1808 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1809 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1810 um.new_family = m->new_family;
1811 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1812 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1813
c0144bea 1814 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 1815}
1816
13c1d189
AE		 1817static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb)
1818{
1819 struct xfrm_user_kmaddress uk;
1820
1821 memset(&uk, 0, sizeof(uk));
1822 uk.family = k->family;
1823 uk.reserved = k->reserved;
1824 memcpy(&uk.local, &k->local, sizeof(uk.local));
a1caa322 1825 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
13c1d189
AE		 1826
1827 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
1828}
1829
1830static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
7deb2264
TG		 1831{
1832 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
13c1d189
AE		 1833 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
1834 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1835 + userpolicy_type_attrsize();
7deb2264
TG		 1836}
1837
5c79de6e 1838static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
13c1d189
AE		 1839 int num_migrate, struct xfrm_kmaddress *k,
1840 struct xfrm_selector *sel, u8 dir, u8 type)
5c79de6e
SS		 1841{
1842 struct xfrm_migrate *mp;
1843 struct xfrm_userpolicy_id *pol_id;
1844 struct nlmsghdr *nlh;
5c79de6e
SS		 1845 int i;
1846
79b8b7f4
TG		 1847 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1848 if (nlh == NULL)
1849 return -EMSGSIZE;
5c79de6e 1850
7b67c857 1851 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 1852 /* copy data from selector, dir, and type to the pol_id */
1853 memset(pol_id, 0, sizeof(*pol_id));
1854 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1855 pol_id->dir = dir;
1856
13c1d189
AE		 1857 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
1858 goto nlmsg_failure;
1859
5c79de6e
SS		 1860 if (copy_to_user_policy_type(type, skb) < 0)
1861 goto nlmsg_failure;
1862
1863 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1864 if (copy_to_user_migrate(mp, skb) < 0)
1865 goto nlmsg_failure;
1866 }
1867
9825069d 1868 return nlmsg_end(skb, nlh);
5c79de6e 1869nlmsg_failure:
9825069d
TG		 1870 nlmsg_cancel(skb, nlh);
1871 return -EMSGSIZE;
5c79de6e
SS		 1872}
1873
1874static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 1875 struct xfrm_migrate *m, int num_migrate,
1876 struct xfrm_kmaddress *k)
5c79de6e 1877{
a6483b79 1878 struct net *net = &init_net;
5c79de6e 1879 struct sk_buff *skb;
5c79de6e 1880
13c1d189 1881 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
5c79de6e
SS		 1882 if (skb == NULL)
1883 return -ENOMEM;
1884
1885 /* build migrate */
13c1d189 1886 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
5c79de6e
SS		 1887 BUG();
1888
a6483b79 1889 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 1890}
1891#else
1892static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
13c1d189
AE		 1893 struct xfrm_migrate *m, int num_migrate,
1894 struct xfrm_kmaddress *k)
5c79de6e
SS		 1895{
1896 return -ENOPROTOOPT;
1897}
1898#endif
d51d081d 1899
a7bd9a45 1900#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 1901
1902static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1903 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1904 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1905 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1906 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1907 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1908 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1909 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 1910 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 1911 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b
TG		 1912 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1913 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 1914 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 1915 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 1916 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 1917 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1918 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 1919 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 1920 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 1921 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1922 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 1923};
1924
492b558b
TG		 1925#undef XMSGSIZE
1926
cf5cb79f 1927static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1a6509d9 1928 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
cf5cb79f
TG		 1929 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1930 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1931 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1932 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1933 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1934 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1935 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1936 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1937 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1938 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1939 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1940 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1941 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1942 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
13c1d189 1943 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
cf5cb79f
TG		 1944};
1945
1da177e4 1946static struct xfrm_link {
5424f32e 1947 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 1948 int (*dump)(struct sk_buff *, struct netlink_callback *);
4c563f76 1949 int (*done)(struct netlink_callback *);
492b558b
TG		 1950} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1951 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1952 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1953 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
4c563f76
TT		 1954 .dump = xfrm_dump_sa,
1955 .done = xfrm_dump_sa_done },
492b558b
TG		 1956 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1957 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1958 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
4c563f76
TT		 1959 .dump = xfrm_dump_policy,
1960 .done = xfrm_dump_policy_done },
492b558b 1961 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 1962 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 1963 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 1964 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1965 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 1966 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 1967 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1968 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 1969 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1970 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 1971 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 1972 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 1973 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 1974};
1975
1d00a4eb 1976static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 1977{
a6483b79 1978 struct net *net = sock_net(skb->sk);
35a7aa08 1979 struct nlattr *attrs[XFRMA_MAX+1];
1da177e4 1980 struct xfrm_link *link;
a7bd9a45 1981 int type, err;
1da177e4 1982
1da177e4 1983 type = nlh->nlmsg_type;
1da177e4 1984 if (type > XFRM_MSG_MAX)
1d00a4eb 1985 return -EINVAL;
1da177e4
LT		 1986
1987 type -= XFRM_MSG_BASE;
1988 link = &xfrm_dispatch[type];
1989
1990 /* All operations require privileges, even GET */
1d00a4eb
TG		 1991 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1992 return -EPERM;
1da177e4 1993
492b558b
TG		 1994 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1995 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1996 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 1997 if (link->dump == NULL)
1d00a4eb 1998 return -EINVAL;
88fc2c84 1999
a6483b79 2000 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
1da177e4
LT		 2001 }
2002
35a7aa08 2003 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 2004 xfrma_policy);
a7bd9a45
TG		 2005 if (err < 0)
2006 return err;
1da177e4
LT		 2007
2008 if (link->doit == NULL)
1d00a4eb 2009 return -EINVAL;
1da177e4 2010
5424f32e 2011 return link->doit(skb, nlh, attrs);
1da177e4
LT		 2012}
2013
cd40b7d3 2014static void xfrm_netlink_rcv(struct sk_buff *skb)
1da177e4 2015{
cd40b7d3
DL		 2016 mutex_lock(&xfrm_cfg_mutex);
2017 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2018 mutex_unlock(&xfrm_cfg_mutex);
1da177e4
LT		 2019}
2020
7deb2264
TG		 2021static inline size_t xfrm_expire_msgsize(void)
2022{
2023 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
2024}
2025
d51d081d 2026static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2027{
2028 struct xfrm_user_expire *ue;
2029 struct nlmsghdr *nlh;
1da177e4 2030
79b8b7f4
TG		 2031 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2032 if (nlh == NULL)
2033 return -EMSGSIZE;
1da177e4 2034
7b67c857 2035 ue = nlmsg_data(nlh);
1da177e4 2036 copy_to_user_state(x, &ue->state);
d51d081d 2037 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2038
9825069d 2039 return nlmsg_end(skb, nlh);
1da177e4
LT		 2040}
2041
26b15dad 2042static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1da177e4 2043{
a6483b79 2044 struct net *net = &init_net;
1da177e4
LT		 2045 struct sk_buff *skb;
2046
7deb2264 2047 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 2048 if (skb == NULL)
2049 return -ENOMEM;
2050
d51d081d 2051 if (build_expire(skb, x, c) < 0)
1da177e4
LT		 2052 BUG();
2053
a6483b79 2054 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2055}
2056
d51d081d
JHS		 2057static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2058{
a6483b79 2059 struct net *net = &init_net;
d51d081d 2060 struct sk_buff *skb;
d51d081d 2061
7deb2264 2062 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 2063 if (skb == NULL)
2064 return -ENOMEM;
2065
2066 if (build_aevent(skb, x, c) < 0)
2067 BUG();
2068
a6483b79 2069 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 2070}
2071
26b15dad
JHS		 2072static int xfrm_notify_sa_flush(struct km_event *c)
2073{
a6483b79 2074 struct net *net = &init_net;
26b15dad
JHS		 2075 struct xfrm_usersa_flush *p;
2076 struct nlmsghdr *nlh;
2077 struct sk_buff *skb;
7deb2264 2078 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 2079
7deb2264 2080 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2081 if (skb == NULL)
2082 return -ENOMEM;
26b15dad 2083
79b8b7f4
TG		 2084 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2085 if (nlh == NULL) {
2086 kfree_skb(skb);
2087 return -EMSGSIZE;
2088 }
26b15dad 2089
7b67c857 2090 p = nlmsg_data(nlh);
bf08867f 2091 p->proto = c->data.proto;
26b15dad 2092
9825069d 2093 nlmsg_end(skb, nlh);
26b15dad 2094
a6483b79 2095 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2096}
2097
7deb2264 2098static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2099{
7deb2264 2100 size_t l = 0;
1a6509d9
HX		 2101 if (x->aead)
2102 l += nla_total_size(aead_len(x->aead));
26b15dad 2103 if (x->aalg)
0f99be0d 2104 l += nla_total_size(xfrm_alg_len(x->aalg));
26b15dad 2105 if (x->ealg)
0f99be0d 2106 l += nla_total_size(xfrm_alg_len(x->ealg));
26b15dad 2107 if (x->calg)
7deb2264 2108 l += nla_total_size(sizeof(*x->calg));
26b15dad 2109 if (x->encap)
7deb2264 2110 l += nla_total_size(sizeof(*x->encap));
68325d3b
HX		 2111 if (x->security)
2112 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2113 x->security->ctx_len);
2114 if (x->coaddr)
2115 l += nla_total_size(sizeof(*x->coaddr));
2116
d26f3984
HX		 2117 /* Must count x->lastused as it may become non-zero behind our back. */
2118 l += nla_total_size(sizeof(u64));
26b15dad
JHS		 2119
2120 return l;
2121}
2122
2123static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2124{
a6483b79 2125 struct net *net = &init_net;
26b15dad 2126 struct xfrm_usersa_info *p;
0603eac0 2127 struct xfrm_usersa_id *id;
26b15dad
JHS		 2128 struct nlmsghdr *nlh;
2129 struct sk_buff *skb;
26b15dad 2130 int len = xfrm_sa_len(x);
0603eac0
HX		 2131 int headlen;
2132
2133 headlen = sizeof(*p);
2134 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2135 len += nla_total_size(headlen);
0603eac0
HX		 2136 headlen = sizeof(*id);
2137 }
7deb2264 2138 len += NLMSG_ALIGN(headlen);
26b15dad 2139
7deb2264 2140 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2141 if (skb == NULL)
2142 return -ENOMEM;
26b15dad 2143
79b8b7f4
TG		 2144 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2145 if (nlh == NULL)
c0144bea 2146 goto nla_put_failure;
26b15dad 2147
7b67c857 2148 p = nlmsg_data(nlh);
0603eac0 2149 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2150 struct nlattr *attr;
2151
7b67c857 2152 id = nlmsg_data(nlh);
0603eac0
HX		 2153 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2154 id->spi = x->id.spi;
2155 id->family = x->props.family;
2156 id->proto = x->id.proto;
2157
c0144bea
TG		 2158 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2159 if (attr == NULL)
2160 goto nla_put_failure;
2161
2162 p = nla_data(attr);
0603eac0
HX		 2163 }
2164
68325d3b
HX		 2165 if (copy_to_user_state_extra(x, p, skb))
2166 goto nla_put_failure;
26b15dad 2167
9825069d 2168 nlmsg_end(skb, nlh);
26b15dad 2169
a6483b79 2170 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2171
c0144bea 2172nla_put_failure:
68325d3b
HX		 2173 /* Somebody screwed up with xfrm_sa_len! */
2174 WARN_ON(1);
26b15dad
JHS		 2175 kfree_skb(skb);
2176 return -1;
2177}
2178
2179static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2180{
2181
2182 switch (c->event) {
f60f6b8f 2183 case XFRM_MSG_EXPIRE:
26b15dad 2184 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2185 case XFRM_MSG_NEWAE:
2186 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2187 case XFRM_MSG_DELSA:
2188 case XFRM_MSG_UPDSA:
2189 case XFRM_MSG_NEWSA:
26b15dad 2190 return xfrm_notify_sa(x, c);
f60f6b8f 2191 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2192 return xfrm_notify_sa_flush(c);
2193 default:
2194 printk("xfrm_user: Unknown SA event %d\n", c->event);
2195 break;
2196 }
2197
2198 return 0;
2199
2200}
2201
7deb2264
TG		 2202static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2203 struct xfrm_policy *xp)
2204{
2205 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2206 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2207 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2208 + userpolicy_type_attrsize();
2209}
2210
1da177e4
LT		 2211static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2212 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2213 int dir)
2214{
2215 struct xfrm_user_acquire *ua;
2216 struct nlmsghdr *nlh;
1da177e4
LT		 2217 __u32 seq = xfrm_get_acqseq();
2218
79b8b7f4
TG		 2219 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2220 if (nlh == NULL)
2221 return -EMSGSIZE;
1da177e4 2222
7b67c857 2223 ua = nlmsg_data(nlh);
1da177e4
LT		 2224 memcpy(&ua->id, &x->id, sizeof(ua->id));
2225 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2226 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2227 copy_to_user_policy(xp, &ua->policy, dir);
2228 ua->aalgos = xt->aalgos;
2229 ua->ealgos = xt->ealgos;
2230 ua->calgos = xt->calgos;
2231 ua->seq = x->km.seq = seq;
2232
2233 if (copy_to_user_tmpl(xp, skb) < 0)
2234 goto nlmsg_failure;
0d681623 2235 if (copy_to_user_state_sec_ctx(x, skb))
df71837d 2236 goto nlmsg_failure;
1459bb36 2237 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2238 goto nlmsg_failure;
1da177e4 2239
9825069d 2240 return nlmsg_end(skb, nlh);
1da177e4
LT		 2241
2242nlmsg_failure:
9825069d
TG		 2243 nlmsg_cancel(skb, nlh);
2244 return -EMSGSIZE;
1da177e4
LT		 2245}
2246
2247static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2248 struct xfrm_policy *xp, int dir)
2249{
a6483b79 2250 struct net *net = xs_net(x);
1da177e4 2251 struct sk_buff *skb;
1da177e4 2252
7deb2264 2253 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2254 if (skb == NULL)
2255 return -ENOMEM;
2256
2257 if (build_acquire(skb, x, xt, xp, dir) < 0)
2258 BUG();
2259
a6483b79 2260 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2261}
2262
2263/* User gives us xfrm_user_policy_info followed by an array of 0
2264 * or more templates.
2265 */
cb969f07 2266static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2267 u8 *data, int len, int *dir)
2268{
2269 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2270 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2271 struct xfrm_policy *xp;
2272 int nr;
2273
cb969f07 2274 switch (sk->sk_family) {
1da177e4
LT		 2275 case AF_INET:
2276 if (opt != IP_XFRM_POLICY) {
2277 *dir = -EOPNOTSUPP;
2278 return NULL;
2279 }
2280 break;
2281#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2282 case AF_INET6:
2283 if (opt != IPV6_XFRM_POLICY) {
2284 *dir = -EOPNOTSUPP;
2285 return NULL;
2286 }
2287 break;
2288#endif
2289 default:
2290 *dir = -EINVAL;
2291 return NULL;
2292 }
2293
2294 *dir = -EINVAL;
2295
2296 if (len < sizeof(*p) ||
2297 verify_newpolicy_info(p))
2298 return NULL;
2299
2300 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2301 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2302 return NULL;
2303
a4f1bac6
HX		 2304 if (p->dir > XFRM_POLICY_OUT)
2305 return NULL;
2306
0331b1f3 2307 xp = xfrm_policy_alloc(&init_net, GFP_KERNEL);
1da177e4
LT		 2308 if (xp == NULL) {
2309 *dir = -ENOBUFS;
2310 return NULL;
2311 }
2312
2313 copy_from_user_policy(xp, p);
f7b6983f 2314 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2315 copy_templates(xp, ut, nr);
2316
2317 *dir = p->dir;
2318
2319 return xp;
2320}
2321
7deb2264
TG		 2322static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2323{
2324 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2325 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2326 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2327 + userpolicy_type_attrsize();
2328}
2329
1da177e4 2330static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
d51d081d 2331 int dir, struct km_event *c)
1da177e4
LT		 2332{
2333 struct xfrm_user_polexpire *upe;
2334 struct nlmsghdr *nlh;
d51d081d 2335 int hard = c->data.hard;
1da177e4 2336
79b8b7f4
TG		 2337 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2338 if (nlh == NULL)
2339 return -EMSGSIZE;
1da177e4 2340
7b67c857 2341 upe = nlmsg_data(nlh);
1da177e4
LT		 2342 copy_to_user_policy(xp, &upe->pol, dir);
2343 if (copy_to_user_tmpl(xp, skb) < 0)
2344 goto nlmsg_failure;
df71837d
TJ		 2345 if (copy_to_user_sec_ctx(xp, skb))
2346 goto nlmsg_failure;
1459bb36 2347 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2348 goto nlmsg_failure;
1da177e4
LT		 2349 upe->hard = !!hard;
2350
9825069d 2351 return nlmsg_end(skb, nlh);
1da177e4
LT		 2352
2353nlmsg_failure:
9825069d
TG		 2354 nlmsg_cancel(skb, nlh);
2355 return -EMSGSIZE;
1da177e4
LT		 2356}
2357
26b15dad 2358static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4 2359{
a6483b79 2360 struct net *net = &init_net;
1da177e4 2361 struct sk_buff *skb;
1da177e4 2362
7deb2264 2363 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2364 if (skb == NULL)
2365 return -ENOMEM;
2366
d51d081d 2367 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2368 BUG();
2369
a6483b79 2370 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2371}
2372
26b15dad
JHS		 2373static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2374{
a6483b79 2375 struct net *net = &init_net;
26b15dad 2376 struct xfrm_userpolicy_info *p;
0603eac0 2377 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2378 struct nlmsghdr *nlh;
2379 struct sk_buff *skb;
7deb2264 2380 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
0603eac0
HX		 2381 int headlen;
2382
2383 headlen = sizeof(*p);
2384 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2385 len += nla_total_size(headlen);
0603eac0
HX		 2386 headlen = sizeof(*id);
2387 }
cfbfd45a 2388 len += userpolicy_type_attrsize();
7deb2264 2389 len += NLMSG_ALIGN(headlen);
26b15dad 2390
7deb2264 2391 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2392 if (skb == NULL)
2393 return -ENOMEM;
26b15dad 2394
79b8b7f4
TG		 2395 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2396 if (nlh == NULL)
2397 goto nlmsg_failure;
26b15dad 2398
7b67c857 2399 p = nlmsg_data(nlh);
0603eac0 2400 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2401 struct nlattr *attr;
2402
7b67c857 2403 id = nlmsg_data(nlh);
0603eac0
HX		 2404 memset(id, 0, sizeof(*id));
2405 id->dir = dir;
2406 if (c->data.byid)
2407 id->index = xp->index;
2408 else
2409 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2410
c0144bea
TG		 2411 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2412 if (attr == NULL)
2413 goto nlmsg_failure;
2414
2415 p = nla_data(attr);
0603eac0 2416 }
26b15dad 2417
26b15dad
JHS		 2418 copy_to_user_policy(xp, p, dir);
2419 if (copy_to_user_tmpl(xp, skb) < 0)
2420 goto nlmsg_failure;
1459bb36 2421 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2422 goto nlmsg_failure;
26b15dad 2423
9825069d 2424 nlmsg_end(skb, nlh);
26b15dad 2425
a6483b79 2426 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2427
2428nlmsg_failure:
2429 kfree_skb(skb);
2430 return -1;
2431}
2432
2433static int xfrm_notify_policy_flush(struct km_event *c)
2434{
a6483b79 2435 struct net *net = &init_net;
26b15dad
JHS		 2436 struct nlmsghdr *nlh;
2437 struct sk_buff *skb;
26b15dad 2438
7deb2264 2439 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2440 if (skb == NULL)
2441 return -ENOMEM;
26b15dad 2442
79b8b7f4
TG		 2443 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2444 if (nlh == NULL)
2445 goto nlmsg_failure;
0c51f53c
JHS		 2446 if (copy_to_user_policy_type(c->data.type, skb) < 0)
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_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2459{
2460
2461 switch (c->event) {
f60f6b8f
HX		 2462 case XFRM_MSG_NEWPOLICY:
2463 case XFRM_MSG_UPDPOLICY:
2464 case XFRM_MSG_DELPOLICY:
26b15dad 2465 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2466 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2467 return xfrm_notify_policy_flush(c);
f60f6b8f 2468 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2469 return xfrm_exp_policy_notify(xp, dir, c);
2470 default:
2471 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2472 }
2473
2474 return 0;
2475
2476}
2477
7deb2264
TG		 2478static inline size_t xfrm_report_msgsize(void)
2479{
2480 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2481}
2482
97a64b45
MN		 2483static int build_report(struct sk_buff *skb, u8 proto,
2484 struct xfrm_selector *sel, xfrm_address_t *addr)
2485{
2486 struct xfrm_user_report *ur;
2487 struct nlmsghdr *nlh;
97a64b45 2488
79b8b7f4
TG		 2489 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2490 if (nlh == NULL)
2491 return -EMSGSIZE;
97a64b45 2492
7b67c857 2493 ur = nlmsg_data(nlh);
97a64b45
MN		 2494 ur->proto = proto;
2495 memcpy(&ur->sel, sel, sizeof(ur->sel));
2496
2497 if (addr)
c0144bea 2498 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
97a64b45 2499
9825069d 2500 return nlmsg_end(skb, nlh);
97a64b45 2501
c0144bea 2502nla_put_failure:
9825069d
TG		 2503 nlmsg_cancel(skb, nlh);
2504 return -EMSGSIZE;
97a64b45
MN		 2505}
2506
2507static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2508 xfrm_address_t *addr)
2509{
a6483b79 2510 struct net *net = &init_net;
97a64b45 2511 struct sk_buff *skb;
97a64b45 2512
7deb2264 2513 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2514 if (skb == NULL)
2515 return -ENOMEM;
2516
2517 if (build_report(skb, proto, sel, addr) < 0)
2518 BUG();
2519
a6483b79 2520 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2521}
2522
3a2dfbe8
MW		 2523static inline size_t xfrm_mapping_msgsize(void)
2524{
2525 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2526}
2527
2528static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2529 xfrm_address_t *new_saddr, __be16 new_sport)
2530{
2531 struct xfrm_user_mapping *um;
2532 struct nlmsghdr *nlh;
2533
2534 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2535 if (nlh == NULL)
2536 return -EMSGSIZE;
2537
2538 um = nlmsg_data(nlh);
2539
2540 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2541 um->id.spi = x->id.spi;
2542 um->id.family = x->props.family;
2543 um->id.proto = x->id.proto;
2544 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2545 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2546 um->new_sport = new_sport;
2547 um->old_sport = x->encap->encap_sport;
2548 um->reqid = x->props.reqid;
2549
2550 return nlmsg_end(skb, nlh);
2551}
2552
2553static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2554 __be16 sport)
2555{
a6483b79 2556 struct net *net = xs_net(x);
3a2dfbe8
MW		 2557 struct sk_buff *skb;
2558
2559 if (x->id.proto != IPPROTO_ESP)
2560 return -EINVAL;
2561
2562 if (!x->encap)
2563 return -EINVAL;
2564
2565 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2566 if (skb == NULL)
2567 return -ENOMEM;
2568
2569 if (build_mapping(skb, x, ipaddr, sport) < 0)
2570 BUG();
2571
a6483b79 2572 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
3a2dfbe8
MW		 2573}
2574
1da177e4
LT		 2575static struct xfrm_mgr netlink_mgr = {
2576 .id = "netlink",
2577 .notify = xfrm_send_state_notify,
2578 .acquire = xfrm_send_acquire,
2579 .compile_policy = xfrm_compile_policy,
2580 .notify_policy = xfrm_send_policy_notify,
97a64b45 2581 .report = xfrm_send_report,
5c79de6e 2582 .migrate = xfrm_send_migrate,
3a2dfbe8 2583 .new_mapping = xfrm_send_mapping,
1da177e4
LT		 2584};
2585
a6483b79 2586static int __net_init xfrm_user_net_init(struct net *net)
1da177e4 2587{
be33690d
PM		 2588 struct sock *nlsk;
2589
a6483b79 2590 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
af65bdfc 2591 xfrm_netlink_rcv, NULL, THIS_MODULE);
be33690d 2592 if (nlsk == NULL)
1da177e4 2593 return -ENOMEM;
a6483b79 2594 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
1da177e4
LT		 2595 return 0;
2596}
2597
a6483b79 2598static void __net_exit xfrm_user_net_exit(struct net *net)
1da177e4 2599{
a6483b79 2600 struct sock *nlsk = net->xfrm.nlsk;
be33690d 2601
a6483b79 2602 rcu_assign_pointer(net->xfrm.nlsk, NULL);
be33690d 2603 synchronize_rcu();
b7c6ba6e 2604 netlink_kernel_release(nlsk);
1da177e4
LT		 2605}
2606
a6483b79
AD		 2607static struct pernet_operations xfrm_user_net_ops = {
2608 .init = xfrm_user_net_init,
2609 .exit = xfrm_user_net_exit,
2610};
2611
2612static int __init xfrm_user_init(void)
2613{
2614 int rv;
2615
2616 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2617
2618 rv = register_pernet_subsys(&xfrm_user_net_ops);
2619 if (rv < 0)
2620 return rv;
2621 rv = xfrm_register_km(&netlink_mgr);
2622 if (rv < 0)
2623 unregister_pernet_subsys(&xfrm_user_net_ops);
2624 return rv;
2625}
2626
2627static void __exit xfrm_user_exit(void)
2628{
2629 xfrm_unregister_km(&netlink_mgr);
2630 unregister_pernet_subsys(&xfrm_user_net_ops);
2631}
2632
1da177e4
LT		 2633module_init(xfrm_user_init);
2634module_exit(xfrm_user_exit);
2635MODULE_LICENSE("GPL");
4fdb3bb7 2636MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 2637
Linux 6.x block layer and io_uring tree(s)