]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - net/xfrm/xfrm_user.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[XFRM] netlink: Use nlmsg_end() and nlmsg_cancel()
[mirror_ubuntu-artful-kernel.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/rtnetlink.h>
23#include <linux/pfkeyv2.h>
24#include <linux/ipsec.h>
25#include <linux/init.h>
26#include <linux/security.h>
27#include <net/sock.h>
28#include <net/xfrm.h>
88fc2c84 29#include <net/netlink.h>
1da177e4 30#include <asm/uaccess.h>
e23c7194
MN		 31#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
32#include <linux/in6.h>
33#endif
161a09e7 34#include <linux/audit.h>
1da177e4 35
1da177e4
LT		 36static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type)
37{
38 struct rtattr *rt = xfrma[type - 1];
39 struct xfrm_algo *algp;
31c26852 40 int len;
1da177e4
LT		 41
42 if (!rt)
43 return 0;
44
31c26852
HX		 45 len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp);
46 if (len < 0)
1da177e4
LT		 47 return -EINVAL;
48
49 algp = RTA_DATA(rt);
31c26852 50
a716c119 51 len -= (algp->alg_key_len + 7U) / 8;
31c26852
HX		 52 if (len < 0)
53 return -EINVAL;
54
1da177e4
LT		 55 switch (type) {
56 case XFRMA_ALG_AUTH:
57 if (!algp->alg_key_len &&
58 strcmp(algp->alg_name, "digest_null") != 0)
59 return -EINVAL;
60 break;
61
62 case XFRMA_ALG_CRYPT:
63 if (!algp->alg_key_len &&
64 strcmp(algp->alg_name, "cipher_null") != 0)
65 return -EINVAL;
66 break;
67
68 case XFRMA_ALG_COMP:
69 /* Zero length keys are legal. */
70 break;
71
72 default:
73 return -EINVAL;
3ff50b79 74 }
1da177e4
LT		 75
76 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
77 return 0;
78}
79
80static int verify_encap_tmpl(struct rtattr **xfrma)
81{
82 struct rtattr *rt = xfrma[XFRMA_ENCAP - 1];
83 struct xfrm_encap_tmpl *encap;
84
85 if (!rt)
86 return 0;
87
88 if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap))
89 return -EINVAL;
90
91 return 0;
92}
93
eb2971b6
MN		 94static int verify_one_addr(struct rtattr **xfrma, enum xfrm_attr_type_t type,
95 xfrm_address_t **addrp)
96{
97 struct rtattr *rt = xfrma[type - 1];
98
99 if (!rt)
100 return 0;
101
102 if ((rt->rta_len - sizeof(*rt)) < sizeof(**addrp))
103 return -EINVAL;
104
105 if (addrp)
106 *addrp = RTA_DATA(rt);
107
108 return 0;
109}
df71837d
TJ		 110
111static inline int verify_sec_ctx_len(struct rtattr **xfrma)
112{
113 struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1];
114 struct xfrm_user_sec_ctx *uctx;
115 int len = 0;
116
117 if (!rt)
118 return 0;
119
120 if (rt->rta_len < sizeof(*uctx))
121 return -EINVAL;
122
123 uctx = RTA_DATA(rt);
124
df71837d
TJ		 125 len += sizeof(struct xfrm_user_sec_ctx);
126 len += uctx->ctx_len;
127
128 if (uctx->len != len)
129 return -EINVAL;
130
131 return 0;
132}
133
134
1da177e4
LT		 135static int verify_newsa_info(struct xfrm_usersa_info *p,
136 struct rtattr **xfrma)
137{
138 int err;
139
140 err = -EINVAL;
141 switch (p->family) {
142 case AF_INET:
143 break;
144
145 case AF_INET6:
146#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
147 break;
148#else
149 err = -EAFNOSUPPORT;
150 goto out;
151#endif
152
153 default:
154 goto out;
3ff50b79 155 }
1da177e4
LT		 156
157 err = -EINVAL;
158 switch (p->id.proto) {
159 case IPPROTO_AH:
160 if (!xfrma[XFRMA_ALG_AUTH-1] ||
161 xfrma[XFRMA_ALG_CRYPT-1] ||
162 xfrma[XFRMA_ALG_COMP-1])
163 goto out;
164 break;
165
166 case IPPROTO_ESP:
167 if ((!xfrma[XFRMA_ALG_AUTH-1] &&
168 !xfrma[XFRMA_ALG_CRYPT-1]) ||
169 xfrma[XFRMA_ALG_COMP-1])
170 goto out;
171 break;
172
173 case IPPROTO_COMP:
174 if (!xfrma[XFRMA_ALG_COMP-1] ||
175 xfrma[XFRMA_ALG_AUTH-1] ||
176 xfrma[XFRMA_ALG_CRYPT-1])
177 goto out;
178 break;
179
e23c7194
MN		 180#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
181 case IPPROTO_DSTOPTS:
182 case IPPROTO_ROUTING:
183 if (xfrma[XFRMA_ALG_COMP-1] ||
184 xfrma[XFRMA_ALG_AUTH-1] ||
185 xfrma[XFRMA_ALG_CRYPT-1] ||
186 xfrma[XFRMA_ENCAP-1] ||
187 xfrma[XFRMA_SEC_CTX-1] ||
188 !xfrma[XFRMA_COADDR-1])
189 goto out;
190 break;
191#endif
192
1da177e4
LT		 193 default:
194 goto out;
3ff50b79 195 }
1da177e4
LT		 196
197 if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH)))
198 goto out;
199 if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT)))
200 goto out;
201 if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP)))
202 goto out;
203 if ((err = verify_encap_tmpl(xfrma)))
204 goto out;
df71837d
TJ		 205 if ((err = verify_sec_ctx_len(xfrma)))
206 goto out;
060f02a3
NT		 207 if ((err = verify_one_addr(xfrma, XFRMA_COADDR, NULL)))
208 goto out;
1da177e4
LT		 209
210 err = -EINVAL;
211 switch (p->mode) {
7e49e6de
MN		 212 case XFRM_MODE_TRANSPORT:
213 case XFRM_MODE_TUNNEL:
060f02a3 214 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 215 case XFRM_MODE_BEET:
1da177e4
LT		 216 break;
217
218 default:
219 goto out;
3ff50b79 220 }
1da177e4
LT		 221
222 err = 0;
223
224out:
225 return err;
226}
227
228static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
229 struct xfrm_algo_desc *(*get_byname)(char *, int),
230 struct rtattr *u_arg)
231{
232 struct rtattr *rta = u_arg;
233 struct xfrm_algo *p, *ualg;
234 struct xfrm_algo_desc *algo;
b9e9dead 235 int len;
1da177e4
LT		 236
237 if (!rta)
238 return 0;
239
240 ualg = RTA_DATA(rta);
241
242 algo = get_byname(ualg->alg_name, 1);
243 if (!algo)
244 return -ENOSYS;
245 *props = algo->desc.sadb_alg_id;
246
b9e9dead 247 len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8;
cdbc6dae 248 p = kmemdup(ualg, len, GFP_KERNEL);
1da177e4
LT		 249 if (!p)
250 return -ENOMEM;
251
04ff1260 252 strcpy(p->alg_name, algo->name);
1da177e4
LT		 253 *algpp = p;
254 return 0;
255}
256
257static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg)
258{
259 struct rtattr *rta = u_arg;
260 struct xfrm_encap_tmpl *p, *uencap;
261
262 if (!rta)
263 return 0;
264
265 uencap = RTA_DATA(rta);
cdbc6dae 266 p = kmemdup(uencap, sizeof(*p), GFP_KERNEL);
1da177e4
LT		 267 if (!p)
268 return -ENOMEM;
269
1da177e4
LT		 270 *encapp = p;
271 return 0;
272}
273
df71837d 274
661697f7 275static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 276{
df71837d
TJ		 277 int len = 0;
278
279 if (xfrm_ctx) {
280 len += sizeof(struct xfrm_user_sec_ctx);
281 len += xfrm_ctx->ctx_len;
282 }
283 return len;
284}
285
286static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
287{
288 struct xfrm_user_sec_ctx *uctx;
289
290 if (!u_arg)
291 return 0;
292
293 uctx = RTA_DATA(u_arg);
294 return security_xfrm_state_alloc(x, uctx);
295}
296
060f02a3
NT		 297static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg)
298{
299 struct rtattr *rta = u_arg;
300 xfrm_address_t *p, *uaddrp;
301
302 if (!rta)
303 return 0;
304
305 uaddrp = RTA_DATA(rta);
cdbc6dae 306 p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL);
060f02a3
NT		 307 if (!p)
308 return -ENOMEM;
309
060f02a3
NT		 310 *addrpp = p;
311 return 0;
312}
313
1da177e4
LT		 314static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
315{
316 memcpy(&x->id, &p->id, sizeof(x->id));
317 memcpy(&x->sel, &p->sel, sizeof(x->sel));
318 memcpy(&x->lft, &p->lft, sizeof(x->lft));
319 x->props.mode = p->mode;
320 x->props.replay_window = p->replay_window;
321 x->props.reqid = p->reqid;
322 x->props.family = p->family;
54489c14 323 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 324 x->props.flags = p->flags;
196b0036
HX		 325
326 /*
327 * Set inner address family if the KM left it as zero.
328 * See comment in validate_tmpl.
329 */
330 if (!x->sel.family)
331 x->sel.family = p->family;
1da177e4
LT		 332}
333
d51d081d
JHS		 334/*
335 * someday when pfkey also has support, we could have the code
336 * somehow made shareable and move it to xfrm_state.c - JHS
337 *
338*/
339static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma)
340{
341 int err = - EINVAL;
342 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
343 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
344 struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1];
345 struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1];
346
347 if (rp) {
348 struct xfrm_replay_state *replay;
349 if (RTA_PAYLOAD(rp) < sizeof(*replay))
350 goto error;
351 replay = RTA_DATA(rp);
352 memcpy(&x->replay, replay, sizeof(*replay));
353 memcpy(&x->preplay, replay, sizeof(*replay));
354 }
355
356 if (lt) {
357 struct xfrm_lifetime_cur *ltime;
358 if (RTA_PAYLOAD(lt) < sizeof(*ltime))
359 goto error;
360 ltime = RTA_DATA(lt);
361 x->curlft.bytes = ltime->bytes;
362 x->curlft.packets = ltime->packets;
363 x->curlft.add_time = ltime->add_time;
364 x->curlft.use_time = ltime->use_time;
365 }
366
367 if (et) {
368 if (RTA_PAYLOAD(et) < sizeof(u32))
369 goto error;
370 x->replay_maxage = *(u32*)RTA_DATA(et);
371 }
372
373 if (rt) {
374 if (RTA_PAYLOAD(rt) < sizeof(u32))
375 goto error;
376 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
377 }
378
379 return 0;
380error:
381 return err;
382}
383
1da177e4
LT		 384static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
385 struct rtattr **xfrma,
386 int *errp)
387{
388 struct xfrm_state *x = xfrm_state_alloc();
389 int err = -ENOMEM;
390
391 if (!x)
392 goto error_no_put;
393
394 copy_from_user_state(x, p);
395
396 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
397 xfrm_aalg_get_byname,
398 xfrma[XFRMA_ALG_AUTH-1])))
399 goto error;
400 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
401 xfrm_ealg_get_byname,
402 xfrma[XFRMA_ALG_CRYPT-1])))
403 goto error;
404 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
405 xfrm_calg_get_byname,
406 xfrma[XFRMA_ALG_COMP-1])))
407 goto error;
408 if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1])))
409 goto error;
060f02a3
NT		 410 if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1])))
411 goto error;
72cb6962 412 err = xfrm_init_state(x);
1da177e4
LT		 413 if (err)
414 goto error;
415
df71837d
TJ		 416 if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1])))
417 goto error;
418
1da177e4 419 x->km.seq = p->seq;
d51d081d
JHS		 420 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
421 /* sysctl_xfrm_aevent_etime is in 100ms units */
422 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
423 x->preplay.bitmap = 0;
424 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
425 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
426
427 /* override default values from above */
428
429 err = xfrm_update_ae_params(x, (struct rtattr **)xfrma);
430 if (err < 0)
431 goto error;
1da177e4
LT		 432
433 return x;
434
435error:
436 x->km.state = XFRM_STATE_DEAD;
437 xfrm_state_put(x);
438error_no_put:
439 *errp = err;
440 return NULL;
441}
442
22e70050
CH		 443static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
444 struct rtattr **xfrma)
1da177e4
LT		 445{
446 struct xfrm_usersa_info *p = NLMSG_DATA(nlh);
447 struct xfrm_state *x;
448 int err;
26b15dad 449 struct km_event c;
1da177e4 450
22e70050 451 err = verify_newsa_info(p, xfrma);
1da177e4
LT		 452 if (err)
453 return err;
454
22e70050 455 x = xfrm_state_construct(p, xfrma, &err);
1da177e4
LT		 456 if (!x)
457 return err;
458
26b15dad 459 xfrm_state_hold(x);
1da177e4
LT		 460 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
461 err = xfrm_state_add(x);
462 else
463 err = xfrm_state_update(x);
464
161a09e7
JL		 465 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
466 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
467
1da177e4
LT		 468 if (err < 0) {
469 x->km.state = XFRM_STATE_DEAD;
21380b81 470 __xfrm_state_put(x);
7d6dfe1f 471 goto out;
1da177e4
LT		 472 }
473
26b15dad
JHS		 474 c.seq = nlh->nlmsg_seq;
475 c.pid = nlh->nlmsg_pid;
f60f6b8f 476 c.event = nlh->nlmsg_type;
26b15dad
JHS		 477
478 km_state_notify(x, &c);
7d6dfe1f 479out:
26b15dad 480 xfrm_state_put(x);
1da177e4
LT		 481 return err;
482}
483
eb2971b6
MN		 484static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
485 struct rtattr **xfrma,
486 int *errp)
487{
488 struct xfrm_state *x = NULL;
489 int err;
490
491 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
492 err = -ESRCH;
493 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
494 } else {
495 xfrm_address_t *saddr = NULL;
496
497 err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr);
498 if (err)
499 goto out;
500
501 if (!saddr) {
502 err = -EINVAL;
503 goto out;
504 }
505
9abbffee 506 err = -ESRCH;
eb2971b6
MN		 507 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
508 p->family);
509 }
510
511 out:
512 if (!x && errp)
513 *errp = err;
514 return x;
515}
516
22e70050
CH		 517static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
518 struct rtattr **xfrma)
1da177e4
LT		 519{
520 struct xfrm_state *x;
eb2971b6 521 int err = -ESRCH;
26b15dad 522 struct km_event c;
1da177e4
LT		 523 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
524
22e70050 525 x = xfrm_user_state_lookup(p, xfrma, &err);
1da177e4 526 if (x == NULL)
eb2971b6 527 return err;
1da177e4 528
6f68dc37 529 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 530 goto out;
531
1da177e4 532 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 533 err = -EPERM;
534 goto out;
1da177e4
LT		 535 }
536
26b15dad 537 err = xfrm_state_delete(x);
161a09e7 538
c8c05a8e
CZ		 539 if (err < 0)
540 goto out;
26b15dad
JHS		 541
542 c.seq = nlh->nlmsg_seq;
543 c.pid = nlh->nlmsg_pid;
f60f6b8f 544 c.event = nlh->nlmsg_type;
26b15dad 545 km_state_notify(x, &c);
1da177e4 546
c8c05a8e 547out:
16bec31d
EP		 548 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
549 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
c8c05a8e 550 xfrm_state_put(x);
26b15dad 551 return err;
1da177e4
LT		 552}
553
554static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
555{
556 memcpy(&p->id, &x->id, sizeof(p->id));
557 memcpy(&p->sel, &x->sel, sizeof(p->sel));
558 memcpy(&p->lft, &x->lft, sizeof(p->lft));
559 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
560 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 561 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 562 p->mode = x->props.mode;
563 p->replay_window = x->props.replay_window;
564 p->reqid = x->props.reqid;
565 p->family = x->props.family;
566 p->flags = x->props.flags;
567 p->seq = x->km.seq;
568}
569
570struct xfrm_dump_info {
571 struct sk_buff *in_skb;
572 struct sk_buff *out_skb;
573 u32 nlmsg_seq;
574 u16 nlmsg_flags;
575 int start_idx;
576 int this_idx;
577};
578
579static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
580{
581 struct xfrm_dump_info *sp = ptr;
582 struct sk_buff *in_skb = sp->in_skb;
583 struct sk_buff *skb = sp->out_skb;
584 struct xfrm_usersa_info *p;
585 struct nlmsghdr *nlh;
1da177e4
LT		 586
587 if (sp->this_idx < sp->start_idx)
588 goto out;
589
79b8b7f4
TG		 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;
1da177e4
LT		 594
595 p = NLMSG_DATA(nlh);
596 copy_to_user_state(x, p);
597
598 if (x->aalg)
599 RTA_PUT(skb, XFRMA_ALG_AUTH,
600 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
601 if (x->ealg)
602 RTA_PUT(skb, XFRMA_ALG_CRYPT,
603 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
604 if (x->calg)
605 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
606
607 if (x->encap)
608 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
609
df71837d
TJ		 610 if (x->security) {
611 int ctx_size = sizeof(struct xfrm_sec_ctx) +
612 x->security->ctx_len;
613 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
614 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
615
616 uctx->exttype = XFRMA_SEC_CTX;
617 uctx->len = ctx_size;
618 uctx->ctx_doi = x->security->ctx_doi;
619 uctx->ctx_alg = x->security->ctx_alg;
620 uctx->ctx_len = x->security->ctx_len;
621 memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len);
622 }
060f02a3
NT		 623
624 if (x->coaddr)
625 RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
626
9afaca05
MN		 627 if (x->lastused)
628 RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);
629
9825069d 630 nlmsg_end(skb, nlh);
1da177e4
LT		 631out:
632 sp->this_idx++;
633 return 0;
634
1da177e4 635rtattr_failure:
9825069d
TG		 636 nlmsg_cancel(skb, nlh);
637 return -EMSGSIZE;
1da177e4
LT		 638}
639
640static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
641{
642 struct xfrm_dump_info info;
643
644 info.in_skb = cb->skb;
645 info.out_skb = skb;
646 info.nlmsg_seq = cb->nlh->nlmsg_seq;
647 info.nlmsg_flags = NLM_F_MULTI;
648 info.this_idx = 0;
649 info.start_idx = cb->args[0];
dc00a525 650 (void) xfrm_state_walk(0, dump_one_state, &info);
1da177e4
LT		 651 cb->args[0] = info.this_idx;
652
653 return skb->len;
654}
655
656static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
657 struct xfrm_state *x, u32 seq)
658{
659 struct xfrm_dump_info info;
660 struct sk_buff *skb;
661
662 skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
663 if (!skb)
664 return ERR_PTR(-ENOMEM);
665
1da177e4
LT		 666 info.in_skb = in_skb;
667 info.out_skb = skb;
668 info.nlmsg_seq = seq;
669 info.nlmsg_flags = 0;
670 info.this_idx = info.start_idx = 0;
671
672 if (dump_one_state(x, 0, &info)) {
673 kfree_skb(skb);
674 return NULL;
675 }
676
677 return skb;
678}
679
ecfd6b18
JHS		 680static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
681{
5a6d3416
JHS		 682 struct xfrmk_spdinfo si;
683 struct xfrmu_spdinfo spc;
684 struct xfrmu_spdhinfo sph;
ecfd6b18
JHS		 685 struct nlmsghdr *nlh;
686 u32 *f;
687
688 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
689 if (nlh == NULL) /* shouldnt really happen ... */
690 return -EMSGSIZE;
691
692 f = nlmsg_data(nlh);
693 *f = flags;
694 xfrm_spd_getinfo(&si);
5a6d3416
JHS		 695 spc.incnt = si.incnt;
696 spc.outcnt = si.outcnt;
697 spc.fwdcnt = si.fwdcnt;
698 spc.inscnt = si.inscnt;
699 spc.outscnt = si.outscnt;
700 spc.fwdscnt = si.fwdscnt;
701 sph.spdhcnt = si.spdhcnt;
702 sph.spdhmcnt = si.spdhmcnt;
703
704 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
705 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
ecfd6b18
JHS		 706
707 return nlmsg_end(skb, nlh);
708
709nla_put_failure:
710 nlmsg_cancel(skb, nlh);
711 return -EMSGSIZE;
712}
713
714static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
715 struct rtattr **xfrma)
716{
717 struct sk_buff *r_skb;
718 u32 *flags = NLMSG_DATA(nlh);
719 u32 spid = NETLINK_CB(skb).pid;
720 u32 seq = nlh->nlmsg_seq;
721 int len = NLMSG_LENGTH(sizeof(u32));
722
5a6d3416
JHS		 723 len += RTA_SPACE(sizeof(struct xfrmu_spdinfo));
724 len += RTA_SPACE(sizeof(struct xfrmu_spdhinfo));
ecfd6b18
JHS		 725
726 r_skb = alloc_skb(len, GFP_ATOMIC);
727 if (r_skb == NULL)
728 return -ENOMEM;
729
730 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
731 BUG();
732
733 return nlmsg_unicast(xfrm_nl, r_skb, spid);
734}
735
28d8909b
JHS		 736static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
737{
af11e316
JHS		 738 struct xfrmk_sadinfo si;
739 struct xfrmu_sadhinfo sh;
28d8909b
JHS		 740 struct nlmsghdr *nlh;
741 u32 *f;
742
743 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
744 if (nlh == NULL) /* shouldnt really happen ... */
745 return -EMSGSIZE;
746
747 f = nlmsg_data(nlh);
748 *f = flags;
749 xfrm_sad_getinfo(&si);
750
af11e316
JHS		 751 sh.sadhmcnt = si.sadhmcnt;
752 sh.sadhcnt = si.sadhcnt;
753
754 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
755 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
28d8909b
JHS		 756
757 return nlmsg_end(skb, nlh);
758
759nla_put_failure:
760 nlmsg_cancel(skb, nlh);
761 return -EMSGSIZE;
762}
763
764static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
765 struct rtattr **xfrma)
766{
767 struct sk_buff *r_skb;
768 u32 *flags = NLMSG_DATA(nlh);
769 u32 spid = NETLINK_CB(skb).pid;
770 u32 seq = nlh->nlmsg_seq;
771 int len = NLMSG_LENGTH(sizeof(u32));
772
af11e316
JHS		 773 len += RTA_SPACE(sizeof(struct xfrmu_sadhinfo));
774 len += RTA_SPACE(sizeof(u32));
28d8909b
JHS		 775
776 r_skb = alloc_skb(len, GFP_ATOMIC);
777
778 if (r_skb == NULL)
779 return -ENOMEM;
780
781 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
782 BUG();
783
784 return nlmsg_unicast(xfrm_nl, r_skb, spid);
785}
786
22e70050
CH		 787static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
788 struct rtattr **xfrma)
1da177e4
LT		 789{
790 struct xfrm_usersa_id *p = NLMSG_DATA(nlh);
791 struct xfrm_state *x;
792 struct sk_buff *resp_skb;
eb2971b6 793 int err = -ESRCH;
1da177e4 794
22e70050 795 x = xfrm_user_state_lookup(p, xfrma, &err);
1da177e4
LT		 796 if (x == NULL)
797 goto out_noput;
798
799 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
800 if (IS_ERR(resp_skb)) {
801 err = PTR_ERR(resp_skb);
802 } else {
803 err = netlink_unicast(xfrm_nl, resp_skb,
804 NETLINK_CB(skb).pid, MSG_DONTWAIT);
805 }
806 xfrm_state_put(x);
807out_noput:
808 return err;
809}
810
811static int verify_userspi_info(struct xfrm_userspi_info *p)
812{
813 switch (p->info.id.proto) {
814 case IPPROTO_AH:
815 case IPPROTO_ESP:
816 break;
817
818 case IPPROTO_COMP:
819 /* IPCOMP spi is 16-bits. */
820 if (p->max >= 0x10000)
821 return -EINVAL;
822 break;
823
824 default:
825 return -EINVAL;
3ff50b79 826 }
1da177e4
LT		 827
828 if (p->min > p->max)
829 return -EINVAL;
830
831 return 0;
832}
833
22e70050
CH		 834static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
835 struct rtattr **xfrma)
1da177e4
LT		 836{
837 struct xfrm_state *x;
838 struct xfrm_userspi_info *p;
839 struct sk_buff *resp_skb;
840 xfrm_address_t *daddr;
841 int family;
842 int err;
843
844 p = NLMSG_DATA(nlh);
845 err = verify_userspi_info(p);
846 if (err)
847 goto out_noput;
848
849 family = p->info.family;
850 daddr = &p->info.id.daddr;
851
852 x = NULL;
853 if (p->info.seq) {
854 x = xfrm_find_acq_byseq(p->info.seq);
855 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
856 xfrm_state_put(x);
857 x = NULL;
858 }
859 }
860
861 if (!x)
862 x = xfrm_find_acq(p->info.mode, p->info.reqid,
863 p->info.id.proto, daddr,
864 &p->info.saddr, 1,
865 family);
866 err = -ENOENT;
867 if (x == NULL)
868 goto out_noput;
869
870 resp_skb = ERR_PTR(-ENOENT);
871
872 spin_lock_bh(&x->lock);
873 if (x->km.state != XFRM_STATE_DEAD) {
874 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
875 if (x->id.spi)
876 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
877 }
878 spin_unlock_bh(&x->lock);
879
880 if (IS_ERR(resp_skb)) {
881 err = PTR_ERR(resp_skb);
882 goto out;
883 }
884
885 err = netlink_unicast(xfrm_nl, resp_skb,
886 NETLINK_CB(skb).pid, MSG_DONTWAIT);
887
888out:
889 xfrm_state_put(x);
890out_noput:
891 return err;
892}
893
b798a9ed 894static int verify_policy_dir(u8 dir)
1da177e4
LT		 895{
896 switch (dir) {
897 case XFRM_POLICY_IN:
898 case XFRM_POLICY_OUT:
899 case XFRM_POLICY_FWD:
900 break;
901
902 default:
903 return -EINVAL;
3ff50b79 904 }
1da177e4
LT		 905
906 return 0;
907}
908
b798a9ed 909static int verify_policy_type(u8 type)
f7b6983f
MN		 910{
911 switch (type) {
912 case XFRM_POLICY_TYPE_MAIN:
913#ifdef CONFIG_XFRM_SUB_POLICY
914 case XFRM_POLICY_TYPE_SUB:
915#endif
916 break;
917
918 default:
919 return -EINVAL;
3ff50b79 920 }
f7b6983f
MN		 921
922 return 0;
923}
924
1da177e4
LT		 925static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
926{
927 switch (p->share) {
928 case XFRM_SHARE_ANY:
929 case XFRM_SHARE_SESSION:
930 case XFRM_SHARE_USER:
931 case XFRM_SHARE_UNIQUE:
932 break;
933
934 default:
935 return -EINVAL;
3ff50b79 936 }
1da177e4
LT		 937
938 switch (p->action) {
939 case XFRM_POLICY_ALLOW:
940 case XFRM_POLICY_BLOCK:
941 break;
942
943 default:
944 return -EINVAL;
3ff50b79 945 }
1da177e4
LT		 946
947 switch (p->sel.family) {
948 case AF_INET:
949 break;
950
951 case AF_INET6:
952#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
953 break;
954#else
955 return -EAFNOSUPPORT;
956#endif
957
958 default:
959 return -EINVAL;
3ff50b79 960 }
1da177e4
LT		 961
962 return verify_policy_dir(p->dir);
963}
964
df71837d
TJ		 965static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma)
966{
967 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
968 struct xfrm_user_sec_ctx *uctx;
969
970 if (!rt)
971 return 0;
972
973 uctx = RTA_DATA(rt);
974 return security_xfrm_policy_alloc(pol, uctx);
975}
976
1da177e4
LT		 977static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
978 int nr)
979{
980 int i;
981
982 xp->xfrm_nr = nr;
983 for (i = 0; i < nr; i++, ut++) {
984 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
985
986 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
987 memcpy(&t->saddr, &ut->saddr,
988 sizeof(xfrm_address_t));
989 t->reqid = ut->reqid;
990 t->mode = ut->mode;
991 t->share = ut->share;
992 t->optional = ut->optional;
993 t->aalgos = ut->aalgos;
994 t->ealgos = ut->ealgos;
995 t->calgos = ut->calgos;
8511d01d 996 t->encap_family = ut->family;
1da177e4
LT		 997 }
998}
999
b4ad86bf
DM		 1000static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1001{
1002 int i;
1003
1004 if (nr > XFRM_MAX_DEPTH)
1005 return -EINVAL;
1006
1007 for (i = 0; i < nr; i++) {
1008 /* We never validated the ut->family value, so many
1009 * applications simply leave it at zero. The check was
1010 * never made and ut->family was ignored because all
1011 * templates could be assumed to have the same family as
1012 * the policy itself. Now that we will have ipv4-in-ipv6
1013 * and ipv6-in-ipv4 tunnels, this is no longer true.
1014 */
1015 if (!ut[i].family)
1016 ut[i].family = family;
1017
1018 switch (ut[i].family) {
1019 case AF_INET:
1020 break;
1021#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1022 case AF_INET6:
1023 break;
1024#endif
1025 default:
1026 return -EINVAL;
3ff50b79 1027 }
b4ad86bf
DM		 1028 }
1029
1030 return 0;
1031}
1032
1da177e4
LT		 1033static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma)
1034{
1035 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1da177e4
LT		 1036
1037 if (!rt) {
1038 pol->xfrm_nr = 0;
1039 } else {
b4ad86bf
DM		 1040 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
1041 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
1042 int err;
1da177e4 1043
b4ad86bf
DM		 1044 err = validate_tmpl(nr, utmpl, pol->family);
1045 if (err)
1046 return err;
1da177e4
LT		 1047
1048 copy_templates(pol, RTA_DATA(rt), nr);
1049 }
1050 return 0;
1051}
1052
f7b6983f
MN		 1053static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma)
1054{
1055 struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1];
1056 struct xfrm_userpolicy_type *upt;
b798a9ed 1057 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1058 int err;
1059
1060 if (rt) {
1061 if (rt->rta_len < sizeof(*upt))
1062 return -EINVAL;
1063
1064 upt = RTA_DATA(rt);
1065 type = upt->type;
1066 }
1067
1068 err = verify_policy_type(type);
1069 if (err)
1070 return err;
1071
1072 *tp = type;
1073 return 0;
1074}
1075
1da177e4
LT		 1076static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1077{
1078 xp->priority = p->priority;
1079 xp->index = p->index;
1080 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1081 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1082 xp->action = p->action;
1083 xp->flags = p->flags;
1084 xp->family = p->sel.family;
1085 /* XXX xp->share = p->share; */
1086}
1087
1088static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1089{
1090 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1091 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1092 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1093 p->priority = xp->priority;
1094 p->index = xp->index;
1095 p->sel.family = xp->family;
1096 p->dir = dir;
1097 p->action = xp->action;
1098 p->flags = xp->flags;
1099 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1100}
1101
1102static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **xfrma, int *errp)
1103{
1104 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1105 int err;
1106
1107 if (!xp) {
1108 *errp = -ENOMEM;
1109 return NULL;
1110 }
1111
1112 copy_from_user_policy(xp, p);
df71837d 1113
f7b6983f
MN		 1114 err = copy_from_user_policy_type(&xp->type, xfrma);
1115 if (err)
1116 goto error;
1117
df71837d
TJ		 1118 if (!(err = copy_from_user_tmpl(xp, xfrma)))
1119 err = copy_from_user_sec_ctx(xp, xfrma);
f7b6983f
MN		 1120 if (err)
1121 goto error;
1da177e4
LT		 1122
1123 return xp;
f7b6983f
MN		 1124 error:
1125 *errp = err;
1126 kfree(xp);
1127 return NULL;
1da177e4
LT		 1128}
1129
22e70050
CH		 1130static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1131 struct rtattr **xfrma)
1da177e4
LT		 1132{
1133 struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh);
1134 struct xfrm_policy *xp;
26b15dad 1135 struct km_event c;
1da177e4
LT		 1136 int err;
1137 int excl;
1138
1139 err = verify_newpolicy_info(p);
df71837d
TJ		 1140 if (err)
1141 return err;
22e70050 1142 err = verify_sec_ctx_len(xfrma);
1da177e4
LT		 1143 if (err)
1144 return err;
1145
22e70050 1146 xp = xfrm_policy_construct(p, xfrma, &err);
1da177e4
LT		 1147 if (!xp)
1148 return err;
1149
26b15dad
JHS		 1150 /* shouldnt excl be based on nlh flags??
1151 * Aha! this is anti-netlink really i.e more pfkey derived
1152 * in netlink excl is a flag and you wouldnt need
1153 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1154 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1155 err = xfrm_policy_insert(p->dir, xp, excl);
161a09e7
JL		 1156 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1157 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1158
1da177e4 1159 if (err) {
5f8ac64b 1160 security_xfrm_policy_free(xp);
1da177e4
LT		 1161 kfree(xp);
1162 return err;
1163 }
1164
f60f6b8f 1165 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1166 c.seq = nlh->nlmsg_seq;
1167 c.pid = nlh->nlmsg_pid;
1168 km_policy_notify(xp, p->dir, &c);
1169
1da177e4
LT		 1170 xfrm_pol_put(xp);
1171
1172 return 0;
1173}
1174
1175static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1176{
1177 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1178 int i;
1179
1180 if (xp->xfrm_nr == 0)
1181 return 0;
1182
1183 for (i = 0; i < xp->xfrm_nr; i++) {
1184 struct xfrm_user_tmpl *up = &vec[i];
1185 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1186
1187 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1188 up->family = kp->encap_family;
1da177e4
LT		 1189 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1190 up->reqid = kp->reqid;
1191 up->mode = kp->mode;
1192 up->share = kp->share;
1193 up->optional = kp->optional;
1194 up->aalgos = kp->aalgos;
1195 up->ealgos = kp->ealgos;
1196 up->calgos = kp->calgos;
1197 }
1198 RTA_PUT(skb, XFRMA_TMPL,
1199 (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr),
1200 vec);
1201
1202 return 0;
1203
1204rtattr_failure:
1205 return -1;
1206}
1207
0d681623 1208static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
df71837d 1209{
0d681623
SH		 1210 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
1211 struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size);
1212 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1213
1214 uctx->exttype = XFRMA_SEC_CTX;
1215 uctx->len = ctx_size;
1216 uctx->ctx_doi = s->ctx_doi;
1217 uctx->ctx_alg = s->ctx_alg;
1218 uctx->ctx_len = s->ctx_len;
1219 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
a716c119 1220 return 0;
df71837d 1221
0d681623
SH		 1222 rtattr_failure:
1223 return -1;
1224}
1225
1226static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1227{
1228 if (x->security) {
1229 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1230 }
1231 return 0;
0d681623 1232}
df71837d 1233
0d681623
SH		 1234static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1235{
1236 if (xp->security) {
1237 return copy_sec_ctx(xp->security, skb);
1238 }
1239 return 0;
df71837d
TJ		 1240}
1241
f7b6983f 1242#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1243static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1244{
1245 struct xfrm_userpolicy_type upt;
1246
1247 memset(&upt, 0, sizeof(upt));
1459bb36 1248 upt.type = type;
f7b6983f
MN		 1249
1250 RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
1251
1252 return 0;
1253
1254rtattr_failure:
1255 return -1;
1256}
1257
1258#else
b798a9ed 1259static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1260{
1261 return 0;
1262}
1263#endif
1264
1da177e4
LT		 1265static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1266{
1267 struct xfrm_dump_info *sp = ptr;
1268 struct xfrm_userpolicy_info *p;
1269 struct sk_buff *in_skb = sp->in_skb;
1270 struct sk_buff *skb = sp->out_skb;
1271 struct nlmsghdr *nlh;
1da177e4
LT		 1272
1273 if (sp->this_idx < sp->start_idx)
1274 goto out;
1275
79b8b7f4
TG		 1276 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1277 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1278 if (nlh == NULL)
1279 return -EMSGSIZE;
1da177e4 1280 p = NLMSG_DATA(nlh);
1da177e4
LT		 1281
1282 copy_to_user_policy(xp, p, dir);
1283 if (copy_to_user_tmpl(xp, skb) < 0)
1284 goto nlmsg_failure;
df71837d
TJ		 1285 if (copy_to_user_sec_ctx(xp, skb))
1286 goto nlmsg_failure;
1459bb36 1287 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 1288 goto nlmsg_failure;
1da177e4 1289
9825069d 1290 nlmsg_end(skb, nlh);
1da177e4
LT		 1291out:
1292 sp->this_idx++;
1293 return 0;
1294
1295nlmsg_failure:
9825069d
TG		 1296 nlmsg_cancel(skb, nlh);
1297 return -EMSGSIZE;
1da177e4
LT		 1298}
1299
1300static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1301{
1302 struct xfrm_dump_info info;
1303
1304 info.in_skb = cb->skb;
1305 info.out_skb = skb;
1306 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1307 info.nlmsg_flags = NLM_F_MULTI;
1308 info.this_idx = 0;
1309 info.start_idx = cb->args[0];
f7b6983f
MN		 1310 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1311#ifdef CONFIG_XFRM_SUB_POLICY
1312 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1313#endif
1da177e4
LT		 1314 cb->args[0] = info.this_idx;
1315
1316 return skb->len;
1317}
1318
1319static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1320 struct xfrm_policy *xp,
1321 int dir, u32 seq)
1322{
1323 struct xfrm_dump_info info;
1324 struct sk_buff *skb;
1325
1326 skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
1327 if (!skb)
1328 return ERR_PTR(-ENOMEM);
1329
1da177e4
LT		 1330 info.in_skb = in_skb;
1331 info.out_skb = skb;
1332 info.nlmsg_seq = seq;
1333 info.nlmsg_flags = 0;
1334 info.this_idx = info.start_idx = 0;
1335
1336 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1337 kfree_skb(skb);
1338 return NULL;
1339 }
1340
1341 return skb;
1342}
1343
22e70050
CH		 1344static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1345 struct rtattr **xfrma)
1da177e4
LT		 1346{
1347 struct xfrm_policy *xp;
1348 struct xfrm_userpolicy_id *p;
b798a9ed 1349 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1350 int err;
26b15dad 1351 struct km_event c;
1da177e4
LT		 1352 int delete;
1353
1354 p = NLMSG_DATA(nlh);
1355 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1356
22e70050 1357 err = copy_from_user_policy_type(&type, xfrma);
f7b6983f
MN		 1358 if (err)
1359 return err;
1360
1da177e4
LT		 1361 err = verify_policy_dir(p->dir);
1362 if (err)
1363 return err;
1364
1365 if (p->index)
ef41aaa0 1366 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
df71837d 1367 else {
22e70050 1368 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
df71837d
TJ		 1369 struct xfrm_policy tmp;
1370
22e70050 1371 err = verify_sec_ctx_len(xfrma);
df71837d
TJ		 1372 if (err)
1373 return err;
1374
1375 memset(&tmp, 0, sizeof(struct xfrm_policy));
1376 if (rt) {
1377 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1378
1379 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1380 return err;
1381 }
ef41aaa0
EP		 1382 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1383 delete, &err);
df71837d
TJ		 1384 security_xfrm_policy_free(&tmp);
1385 }
1da177e4
LT		 1386 if (xp == NULL)
1387 return -ENOENT;
1388
1389 if (!delete) {
1390 struct sk_buff *resp_skb;
1391
1392 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1393 if (IS_ERR(resp_skb)) {
1394 err = PTR_ERR(resp_skb);
1395 } else {
1396 err = netlink_unicast(xfrm_nl, resp_skb,
1397 NETLINK_CB(skb).pid,
1398 MSG_DONTWAIT);
1399 }
26b15dad 1400 } else {
13fcfbb0
DM		 1401 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1402 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1403
1404 if (err != 0)
c8c05a8e 1405 goto out;
13fcfbb0 1406
e7443892 1407 c.data.byid = p->index;
f60f6b8f 1408 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1409 c.seq = nlh->nlmsg_seq;
1410 c.pid = nlh->nlmsg_pid;
1411 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1412 }
1413
c8c05a8e 1414out:
ef41aaa0 1415 xfrm_pol_put(xp);
1da177e4
LT		 1416 return err;
1417}
1418
22e70050
CH		 1419static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
1420 struct rtattr **xfrma)
1da177e4 1421{
26b15dad 1422 struct km_event c;
1da177e4 1423 struct xfrm_usersa_flush *p = NLMSG_DATA(nlh);
161a09e7 1424 struct xfrm_audit audit_info;
4aa2e62c 1425 int err;
1da177e4 1426
161a09e7
JL		 1427 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1428 audit_info.secid = NETLINK_CB(skb).sid;
4aa2e62c
JL		 1429 err = xfrm_state_flush(p->proto, &audit_info);
1430 if (err)
1431 return err;
bf08867f 1432 c.data.proto = p->proto;
f60f6b8f 1433 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1434 c.seq = nlh->nlmsg_seq;
1435 c.pid = nlh->nlmsg_pid;
1436 km_state_notify(NULL, &c);
1437
1da177e4
LT		 1438 return 0;
1439}
1440
d51d081d
JHS		 1441
1442static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1443{
1444 struct xfrm_aevent_id *id;
1445 struct nlmsghdr *nlh;
1446 struct xfrm_lifetime_cur ltime;
d51d081d 1447
79b8b7f4
TG		 1448 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1449 if (nlh == NULL)
1450 return -EMSGSIZE;
d51d081d 1451 id = NLMSG_DATA(nlh);
d51d081d 1452
2b5f6dcc 1453 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1454 id->sa_id.spi = x->id.spi;
1455 id->sa_id.family = x->props.family;
1456 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1457 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1458 id->reqid = x->props.reqid;
d51d081d
JHS		 1459 id->flags = c->data.aevent;
1460
1461 RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1462
1463 ltime.bytes = x->curlft.bytes;
1464 ltime.packets = x->curlft.packets;
1465 ltime.add_time = x->curlft.add_time;
1466 ltime.use_time = x->curlft.use_time;
1467
1468 RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), &ltime);
1469
1470 if (id->flags&XFRM_AE_RTHR) {
1471 RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff);
1472 }
1473
1474 if (id->flags&XFRM_AE_ETHR) {
1475 u32 etimer = x->replay_maxage*10/HZ;
1476 RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer);
1477 }
1478
9825069d 1479 return nlmsg_end(skb, nlh);
d51d081d
JHS		 1480
1481rtattr_failure:
9825069d
TG		 1482 nlmsg_cancel(skb, nlh);
1483 return -EMSGSIZE;
d51d081d
JHS		 1484}
1485
22e70050
CH		 1486static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1487 struct rtattr **xfrma)
d51d081d
JHS		 1488{
1489 struct xfrm_state *x;
1490 struct sk_buff *r_skb;
1491 int err;
1492 struct km_event c;
1493 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1494 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
1495 struct xfrm_usersa_id *id = &p->sa_id;
1496
1497 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
1498 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
1499
1500 if (p->flags&XFRM_AE_RTHR)
1501 len+=RTA_SPACE(sizeof(u32));
1502
1503 if (p->flags&XFRM_AE_ETHR)
1504 len+=RTA_SPACE(sizeof(u32));
1505
1506 r_skb = alloc_skb(len, GFP_ATOMIC);
1507 if (r_skb == NULL)
1508 return -ENOMEM;
1509
1510 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1511 if (x == NULL) {
b08d5840 1512 kfree_skb(r_skb);
d51d081d
JHS		 1513 return -ESRCH;
1514 }
1515
1516 /*
1517 * XXX: is this lock really needed - none of the other
1518 * gets lock (the concern is things getting updated
1519 * while we are still reading) - jhs
1520 */
1521 spin_lock_bh(&x->lock);
1522 c.data.aevent = p->flags;
1523 c.seq = nlh->nlmsg_seq;
1524 c.pid = nlh->nlmsg_pid;
1525
1526 if (build_aevent(r_skb, x, &c) < 0)
1527 BUG();
1528 err = netlink_unicast(xfrm_nl, r_skb,
1529 NETLINK_CB(skb).pid, MSG_DONTWAIT);
1530 spin_unlock_bh(&x->lock);
1531 xfrm_state_put(x);
1532 return err;
1533}
1534
22e70050
CH		 1535static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
1536 struct rtattr **xfrma)
d51d081d
JHS		 1537{
1538 struct xfrm_state *x;
1539 struct km_event c;
1540 int err = - EINVAL;
1541 struct xfrm_aevent_id *p = NLMSG_DATA(nlh);
1542 struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1];
1543 struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1];
1544
1545 if (!lt && !rp)
1546 return err;
1547
1548 /* pedantic mode - thou shalt sayeth replaceth */
1549 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1550 return err;
1551
1552 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1553 if (x == NULL)
1554 return -ESRCH;
1555
1556 if (x->km.state != XFRM_STATE_VALID)
1557 goto out;
1558
1559 spin_lock_bh(&x->lock);
22e70050 1560 err = xfrm_update_ae_params(x, xfrma);
d51d081d
JHS		 1561 spin_unlock_bh(&x->lock);
1562 if (err < 0)
1563 goto out;
1564
1565 c.event = nlh->nlmsg_type;
1566 c.seq = nlh->nlmsg_seq;
1567 c.pid = nlh->nlmsg_pid;
1568 c.data.aevent = XFRM_AE_CU;
1569 km_state_notify(x, &c);
1570 err = 0;
1571out:
1572 xfrm_state_put(x);
1573 return err;
1574}
1575
22e70050
CH		 1576static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
1577 struct rtattr **xfrma)
1da177e4 1578{
f7b6983f 1579 struct km_event c;
b798a9ed 1580 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1581 int err;
161a09e7 1582 struct xfrm_audit audit_info;
f7b6983f 1583
22e70050 1584 err = copy_from_user_policy_type(&type, xfrma);
f7b6983f
MN		 1585 if (err)
1586 return err;
26b15dad 1587
161a09e7
JL		 1588 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1589 audit_info.secid = NETLINK_CB(skb).sid;
4aa2e62c
JL		 1590 err = xfrm_policy_flush(type, &audit_info);
1591 if (err)
1592 return err;
f7b6983f 1593 c.data.type = type;
f60f6b8f 1594 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1595 c.seq = nlh->nlmsg_seq;
1596 c.pid = nlh->nlmsg_pid;
1597 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1598 return 0;
1599}
1600
22e70050
CH		 1601static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1602 struct rtattr **xfrma)
6c5c8ca7
JHS		 1603{
1604 struct xfrm_policy *xp;
1605 struct xfrm_user_polexpire *up = NLMSG_DATA(nlh);
1606 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1607 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7
JHS		 1608 int err = -ENOENT;
1609
22e70050 1610 err = copy_from_user_policy_type(&type, xfrma);
f7b6983f
MN		 1611 if (err)
1612 return err;
1613
6c5c8ca7 1614 if (p->index)
ef41aaa0 1615 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
6c5c8ca7 1616 else {
22e70050 1617 struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1];
6c5c8ca7
JHS		 1618 struct xfrm_policy tmp;
1619
22e70050 1620 err = verify_sec_ctx_len(xfrma);
6c5c8ca7
JHS		 1621 if (err)
1622 return err;
1623
1624 memset(&tmp, 0, sizeof(struct xfrm_policy));
1625 if (rt) {
1626 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1627
1628 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1629 return err;
1630 }
ef41aaa0
EP		 1631 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1632 0, &err);
6c5c8ca7
JHS		 1633 security_xfrm_policy_free(&tmp);
1634 }
1635
1636 if (xp == NULL)
ef41aaa0
EP		 1637 return -ENOENT;
1638 read_lock(&xp->lock);
6c5c8ca7
JHS		 1639 if (xp->dead) {
1640 read_unlock(&xp->lock);
1641 goto out;
1642 }
1643
1644 read_unlock(&xp->lock);
1645 err = 0;
1646 if (up->hard) {
1647 xfrm_policy_delete(xp, p->dir);
161a09e7
JL		 1648 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1649 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1650
6c5c8ca7
JHS		 1651 } else {
1652 // reset the timers here?
1653 printk("Dont know what to do with soft policy expire\n");
1654 }
1655 km_policy_expired(xp, p->dir, up->hard, current->pid);
1656
1657out:
1658 xfrm_pol_put(xp);
1659 return err;
1660}
1661
22e70050
CH		 1662static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
1663 struct rtattr **xfrma)
53bc6b4d
JHS		 1664{
1665 struct xfrm_state *x;
1666 int err;
1667 struct xfrm_user_expire *ue = NLMSG_DATA(nlh);
1668 struct xfrm_usersa_info *p = &ue->state;
1669
1670 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1671
3a765aa5 1672 err = -ENOENT;
53bc6b4d
JHS		 1673 if (x == NULL)
1674 return err;
1675
53bc6b4d 1676 spin_lock_bh(&x->lock);
3a765aa5 1677 err = -EINVAL;
53bc6b4d
JHS		 1678 if (x->km.state != XFRM_STATE_VALID)
1679 goto out;
1680 km_state_expired(x, ue->hard, current->pid);
1681
161a09e7 1682 if (ue->hard) {
53bc6b4d 1683 __xfrm_state_delete(x);
161a09e7
JL		 1684 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1685 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1686 }
3a765aa5 1687 err = 0;
53bc6b4d
JHS		 1688out:
1689 spin_unlock_bh(&x->lock);
1690 xfrm_state_put(x);
1691 return err;
1692}
1693
22e70050
CH		 1694static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
1695 struct rtattr **xfrma)
980ebd25
JHS		 1696{
1697 struct xfrm_policy *xp;
1698 struct xfrm_user_tmpl *ut;
1699 int i;
1700 struct rtattr *rt = xfrma[XFRMA_TMPL-1];
1701
1702 struct xfrm_user_acquire *ua = NLMSG_DATA(nlh);
1703 struct xfrm_state *x = xfrm_state_alloc();
1704 int err = -ENOMEM;
1705
1706 if (!x)
1707 return err;
1708
1709 err = verify_newpolicy_info(&ua->policy);
1710 if (err) {
1711 printk("BAD policy passed\n");
1712 kfree(x);
1713 return err;
1714 }
1715
1716 /* build an XP */
b4ad86bf
DM		 1717 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err);
1718 if (!xp) {
980ebd25
JHS		 1719 kfree(x);
1720 return err;
1721 }
1722
1723 memcpy(&x->id, &ua->id, sizeof(ua->id));
1724 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1725 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1726
1727 ut = RTA_DATA(rt);
1728 /* extract the templates and for each call km_key */
1729 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1730 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1731 memcpy(&x->id, &t->id, sizeof(x->id));
1732 x->props.mode = t->mode;
1733 x->props.reqid = t->reqid;
1734 x->props.family = ut->family;
1735 t->aalgos = ua->aalgos;
1736 t->ealgos = ua->ealgos;
1737 t->calgos = ua->calgos;
1738 err = km_query(x, t, xp);
1739
1740 }
1741
1742 kfree(x);
1743 kfree(xp);
1744
1745 return 0;
1746}
1747
5c79de6e
SS		 1748#ifdef CONFIG_XFRM_MIGRATE
1749static int verify_user_migrate(struct rtattr **xfrma)
1750{
1751 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1752 struct xfrm_user_migrate *um;
1753
1754 if (!rt)
1755 return -EINVAL;
1756
1757 if ((rt->rta_len - sizeof(*rt)) < sizeof(*um))
1758 return -EINVAL;
1759
1760 return 0;
1761}
1762
1763static int copy_from_user_migrate(struct xfrm_migrate *ma,
1764 struct rtattr **xfrma, int *num)
1765{
1766 struct rtattr *rt = xfrma[XFRMA_MIGRATE-1];
1767 struct xfrm_user_migrate *um;
1768 int i, num_migrate;
1769
1770 um = RTA_DATA(rt);
1771 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1772
1773 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1774 return -EINVAL;
1775
1776 for (i = 0; i < num_migrate; i++, um++, ma++) {
1777 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1778 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1779 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1780 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1781
1782 ma->proto = um->proto;
1783 ma->mode = um->mode;
1784 ma->reqid = um->reqid;
1785
1786 ma->old_family = um->old_family;
1787 ma->new_family = um->new_family;
1788 }
1789
1790 *num = i;
1791 return 0;
1792}
1793
1794static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1795 struct rtattr **xfrma)
1796{
1797 struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh);
1798 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1799 u8 type;
1800 int err;
1801 int n = 0;
1802
1803 err = verify_user_migrate((struct rtattr **)xfrma);
1804 if (err)
1805 return err;
1806
1807 err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma);
1808 if (err)
1809 return err;
1810
1811 err = copy_from_user_migrate((struct xfrm_migrate *)m,
1812 (struct rtattr **)xfrma, &n);
1813 if (err)
1814 return err;
1815
1816 if (!n)
1817 return 0;
1818
1819 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1820
1821 return 0;
1822}
1823#else
1824static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
1825 struct rtattr **xfrma)
1826{
1827 return -ENOPROTOOPT;
1828}
1829#endif
1830
1831#ifdef CONFIG_XFRM_MIGRATE
1832static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1833{
1834 struct xfrm_user_migrate um;
1835
1836 memset(&um, 0, sizeof(um));
1837 um.proto = m->proto;
1838 um.mode = m->mode;
1839 um.reqid = m->reqid;
1840 um.old_family = m->old_family;
1841 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1842 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1843 um.new_family = m->new_family;
1844 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1845 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1846
1847 RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um);
1848 return 0;
1849
1850rtattr_failure:
1851 return -1;
1852}
1853
1854static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1855 int num_migrate, struct xfrm_selector *sel,
1856 u8 dir, u8 type)
1857{
1858 struct xfrm_migrate *mp;
1859 struct xfrm_userpolicy_id *pol_id;
1860 struct nlmsghdr *nlh;
5c79de6e
SS		 1861 int i;
1862
79b8b7f4
TG		 1863 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1864 if (nlh == NULL)
1865 return -EMSGSIZE;
5c79de6e 1866 pol_id = NLMSG_DATA(nlh);
5c79de6e
SS		 1867
1868 /* copy data from selector, dir, and type to the pol_id */
1869 memset(pol_id, 0, sizeof(*pol_id));
1870 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1871 pol_id->dir = dir;
1872
1873 if (copy_to_user_policy_type(type, skb) < 0)
1874 goto nlmsg_failure;
1875
1876 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1877 if (copy_to_user_migrate(mp, skb) < 0)
1878 goto nlmsg_failure;
1879 }
1880
9825069d 1881 return nlmsg_end(skb, nlh);
5c79de6e 1882nlmsg_failure:
9825069d
TG		 1883 nlmsg_cancel(skb, nlh);
1884 return -EMSGSIZE;
5c79de6e
SS		 1885}
1886
1887static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1888 struct xfrm_migrate *m, int num_migrate)
1889{
1890 struct sk_buff *skb;
1891 size_t len;
1892
1893 len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate);
1894 len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id));
1895#ifdef CONFIG_XFRM_SUB_POLICY
1896 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
1897#endif
1898 skb = alloc_skb(len, GFP_ATOMIC);
1899 if (skb == NULL)
1900 return -ENOMEM;
1901
1902 /* build migrate */
1903 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1904 BUG();
1905
1906 NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE;
1907 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE,
1908 GFP_ATOMIC);
1909}
1910#else
1911static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1912 struct xfrm_migrate *m, int num_migrate)
1913{
1914 return -ENOPROTOOPT;
1915}
1916#endif
d51d081d 1917
492b558b
TG		 1918#define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1919
1920static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1921 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1922 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1923 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1924 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1925 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1926 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1927 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 1928 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 1929 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b
TG		 1930 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1931 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 1932 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b
TG		 1933 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
1934 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0),
d51d081d
JHS		 1935 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1936 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 1937 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 1938 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
566ec034 1939 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
ecfd6b18 1940 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)),
1da177e4
LT		 1941};
1942
492b558b
TG		 1943#undef XMSGSIZE
1944
1da177e4 1945static struct xfrm_link {
22e70050 1946 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1da177e4 1947 int (*dump)(struct sk_buff *, struct netlink_callback *);
492b558b
TG		 1948} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1949 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1950 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1951 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1952 .dump = xfrm_dump_sa },
1953 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1954 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1955 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1956 .dump = xfrm_dump_policy },
1957 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 1958 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 1959 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 1960 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1961 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 1962 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 1963 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1964 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 1965 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1966 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 1967 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 1968 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 1969 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 1970};
1971
1d00a4eb 1972static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4
LT		 1973{
1974 struct rtattr *xfrma[XFRMA_MAX];
1975 struct xfrm_link *link;
c702e804 1976 int type, min_len;
1da177e4 1977
1da177e4 1978 type = nlh->nlmsg_type;
1da177e4 1979 if (type > XFRM_MSG_MAX)
1d00a4eb 1980 return -EINVAL;
1da177e4
LT		 1981
1982 type -= XFRM_MSG_BASE;
1983 link = &xfrm_dispatch[type];
1984
1985 /* All operations require privileges, even GET */
1d00a4eb
TG		 1986 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1987 return -EPERM;
1da177e4 1988
492b558b
TG		 1989 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1990 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1991 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 1992 if (link->dump == NULL)
1d00a4eb 1993 return -EINVAL;
88fc2c84 1994
c702e804 1995 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1da177e4
LT		 1996 }
1997
1998 memset(xfrma, 0, sizeof(xfrma));
1999
2000 if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type]))
1d00a4eb 2001 return -EINVAL;
1da177e4
LT		 2002
2003 if (nlh->nlmsg_len > min_len) {
2004 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
2005 struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len);
2006
2007 while (RTA_OK(attr, attrlen)) {
2008 unsigned short flavor = attr->rta_type;
2009 if (flavor) {
2010 if (flavor > XFRMA_MAX)
1d00a4eb 2011 return -EINVAL;
1da177e4
LT		 2012 xfrma[flavor - 1] = attr;
2013 }
2014 attr = RTA_NEXT(attr, attrlen);
2015 }
2016 }
2017
2018 if (link->doit == NULL)
1d00a4eb 2019 return -EINVAL;
1da177e4 2020
1d00a4eb 2021 return link->doit(skb, nlh, xfrma);
1da177e4
LT		 2022}
2023
1da177e4
LT		 2024static void xfrm_netlink_rcv(struct sock *sk, int len)
2025{
88fc2c84 2026 unsigned int qlen = 0;
2a0a6ebe 2027
1da177e4 2028 do {
4a3e2f71 2029 mutex_lock(&xfrm_cfg_mutex);
88fc2c84 2030 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
4a3e2f71 2031 mutex_unlock(&xfrm_cfg_mutex);
1da177e4 2032
2a0a6ebe 2033 } while (qlen);
1da177e4
LT		 2034}
2035
d51d081d 2036static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2037{
2038 struct xfrm_user_expire *ue;
2039 struct nlmsghdr *nlh;
1da177e4 2040
79b8b7f4
TG		 2041 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2042 if (nlh == NULL)
2043 return -EMSGSIZE;
1da177e4 2044 ue = NLMSG_DATA(nlh);
1da177e4
LT		 2045
2046 copy_to_user_state(x, &ue->state);
d51d081d 2047 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 2048
9825069d 2049 return nlmsg_end(skb, nlh);
1da177e4
LT		 2050}
2051
26b15dad 2052static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 2053{
2054 struct sk_buff *skb;
ee57eef9 2055 int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire));
1da177e4 2056
ee57eef9 2057 skb = alloc_skb(len, GFP_ATOMIC);
1da177e4
LT		 2058 if (skb == NULL)
2059 return -ENOMEM;
2060
d51d081d 2061 if (build_expire(skb, x, c) < 0)
1da177e4
LT		 2062 BUG();
2063
ac6d439d
PM		 2064 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2065 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2066}
2067
d51d081d
JHS		 2068static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2069{
2070 struct sk_buff *skb;
2071 int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id));
2072
2073 len += RTA_SPACE(sizeof(struct xfrm_replay_state));
2074 len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur));
2075 skb = alloc_skb(len, GFP_ATOMIC);
2076 if (skb == NULL)
2077 return -ENOMEM;
2078
2079 if (build_aevent(skb, x, c) < 0)
2080 BUG();
2081
2082 NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS;
2083 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
2084}
2085
26b15dad
JHS		 2086static int xfrm_notify_sa_flush(struct km_event *c)
2087{
2088 struct xfrm_usersa_flush *p;
2089 struct nlmsghdr *nlh;
2090 struct sk_buff *skb;
26b15dad
JHS		 2091 int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush));
2092
2093 skb = alloc_skb(len, GFP_ATOMIC);
2094 if (skb == NULL)
2095 return -ENOMEM;
26b15dad 2096
79b8b7f4
TG		 2097 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2098 if (nlh == NULL) {
2099 kfree_skb(skb);
2100 return -EMSGSIZE;
2101 }
26b15dad
JHS		 2102
2103 p = NLMSG_DATA(nlh);
bf08867f 2104 p->proto = c->data.proto;
26b15dad 2105
9825069d 2106 nlmsg_end(skb, nlh);
26b15dad 2107
ac6d439d
PM		 2108 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2109 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2110}
2111
b6f99a21 2112static inline int xfrm_sa_len(struct xfrm_state *x)
26b15dad 2113{
0603eac0 2114 int l = 0;
26b15dad
JHS		 2115 if (x->aalg)
2116 l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8);
2117 if (x->ealg)
2118 l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8);
2119 if (x->calg)
2120 l += RTA_SPACE(sizeof(*x->calg));
2121 if (x->encap)
2122 l += RTA_SPACE(sizeof(*x->encap));
2123
2124 return l;
2125}
2126
2127static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2128{
2129 struct xfrm_usersa_info *p;
0603eac0 2130 struct xfrm_usersa_id *id;
26b15dad
JHS		 2131 struct nlmsghdr *nlh;
2132 struct sk_buff *skb;
26b15dad 2133 int len = xfrm_sa_len(x);
0603eac0
HX		 2134 int headlen;
2135
2136 headlen = sizeof(*p);
2137 if (c->event == XFRM_MSG_DELSA) {
2138 len += RTA_SPACE(headlen);
2139 headlen = sizeof(*id);
2140 }
2141 len += NLMSG_SPACE(headlen);
26b15dad
JHS		 2142
2143 skb = alloc_skb(len, GFP_ATOMIC);
2144 if (skb == NULL)
2145 return -ENOMEM;
26b15dad 2146
79b8b7f4
TG		 2147 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2148 if (nlh == NULL)
2149 goto nlmsg_failure;
26b15dad
JHS		 2150
2151 p = NLMSG_DATA(nlh);
0603eac0
HX		 2152 if (c->event == XFRM_MSG_DELSA) {
2153 id = NLMSG_DATA(nlh);
2154 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2155 id->spi = x->id.spi;
2156 id->family = x->props.family;
2157 id->proto = x->id.proto;
2158
2159 p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p)));
2160 }
2161
26b15dad
JHS		 2162 copy_to_user_state(x, p);
2163
2164 if (x->aalg)
2165 RTA_PUT(skb, XFRMA_ALG_AUTH,
2166 sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg);
2167 if (x->ealg)
2168 RTA_PUT(skb, XFRMA_ALG_CRYPT,
2169 sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg);
2170 if (x->calg)
2171 RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
2172
2173 if (x->encap)
2174 RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
2175
9825069d 2176 nlmsg_end(skb, nlh);
26b15dad 2177
ac6d439d
PM		 2178 NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
2179 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2180
2181nlmsg_failure:
2182rtattr_failure:
2183 kfree_skb(skb);
2184 return -1;
2185}
2186
2187static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2188{
2189
2190 switch (c->event) {
f60f6b8f 2191 case XFRM_MSG_EXPIRE:
26b15dad 2192 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2193 case XFRM_MSG_NEWAE:
2194 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2195 case XFRM_MSG_DELSA:
2196 case XFRM_MSG_UPDSA:
2197 case XFRM_MSG_NEWSA:
26b15dad 2198 return xfrm_notify_sa(x, c);
f60f6b8f 2199 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2200 return xfrm_notify_sa_flush(c);
2201 default:
2202 printk("xfrm_user: Unknown SA event %d\n", c->event);
2203 break;
2204 }
2205
2206 return 0;
2207
2208}
2209
1da177e4
LT		 2210static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2211 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2212 int dir)
2213{
2214 struct xfrm_user_acquire *ua;
2215 struct nlmsghdr *nlh;
1da177e4
LT		 2216 __u32 seq = xfrm_get_acqseq();
2217
79b8b7f4
TG		 2218 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2219 if (nlh == NULL)
2220 return -EMSGSIZE;
1da177e4 2221 ua = NLMSG_DATA(nlh);
1da177e4
LT		 2222
2223 memcpy(&ua->id, &x->id, sizeof(ua->id));
2224 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2225 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2226 copy_to_user_policy(xp, &ua->policy, dir);
2227 ua->aalgos = xt->aalgos;
2228 ua->ealgos = xt->ealgos;
2229 ua->calgos = xt->calgos;
2230 ua->seq = x->km.seq = seq;
2231
2232 if (copy_to_user_tmpl(xp, skb) < 0)
2233 goto nlmsg_failure;
0d681623 2234 if (copy_to_user_state_sec_ctx(x, skb))
df71837d 2235 goto nlmsg_failure;
1459bb36 2236 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2237 goto nlmsg_failure;
1da177e4 2238
9825069d 2239 return nlmsg_end(skb, nlh);
1da177e4
LT		 2240
2241nlmsg_failure:
9825069d
TG		 2242 nlmsg_cancel(skb, nlh);
2243 return -EMSGSIZE;
1da177e4
LT		 2244}
2245
2246static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2247 struct xfrm_policy *xp, int dir)
2248{
2249 struct sk_buff *skb;
2250 size_t len;
2251
2252 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2253 len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire));
661697f7 2254 len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security));
785fd8b8
JHS		 2255#ifdef CONFIG_XFRM_SUB_POLICY
2256 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2257#endif
1da177e4
LT		 2258 skb = alloc_skb(len, GFP_ATOMIC);
2259 if (skb == NULL)
2260 return -ENOMEM;
2261
2262 if (build_acquire(skb, x, xt, xp, dir) < 0)
2263 BUG();
2264
ac6d439d
PM		 2265 NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE;
2266 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2267}
2268
2269/* User gives us xfrm_user_policy_info followed by an array of 0
2270 * or more templates.
2271 */
cb969f07 2272static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2273 u8 *data, int len, int *dir)
2274{
2275 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2276 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2277 struct xfrm_policy *xp;
2278 int nr;
2279
cb969f07 2280 switch (sk->sk_family) {
1da177e4
LT		 2281 case AF_INET:
2282 if (opt != IP_XFRM_POLICY) {
2283 *dir = -EOPNOTSUPP;
2284 return NULL;
2285 }
2286 break;
2287#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2288 case AF_INET6:
2289 if (opt != IPV6_XFRM_POLICY) {
2290 *dir = -EOPNOTSUPP;
2291 return NULL;
2292 }
2293 break;
2294#endif
2295 default:
2296 *dir = -EINVAL;
2297 return NULL;
2298 }
2299
2300 *dir = -EINVAL;
2301
2302 if (len < sizeof(*p) ||
2303 verify_newpolicy_info(p))
2304 return NULL;
2305
2306 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2307 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2308 return NULL;
2309
a4f1bac6
HX		 2310 if (p->dir > XFRM_POLICY_OUT)
2311 return NULL;
2312
1da177e4
LT		 2313 xp = xfrm_policy_alloc(GFP_KERNEL);
2314 if (xp == NULL) {
2315 *dir = -ENOBUFS;
2316 return NULL;
2317 }
2318
2319 copy_from_user_policy(xp, p);
f7b6983f 2320 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2321 copy_templates(xp, ut, nr);
2322
2323 *dir = p->dir;
2324
2325 return xp;
2326}
2327
2328static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
d51d081d 2329 int dir, struct km_event *c)
1da177e4
LT		 2330{
2331 struct xfrm_user_polexpire *upe;
2332 struct nlmsghdr *nlh;
d51d081d 2333 int hard = c->data.hard;
1da177e4 2334
79b8b7f4
TG		 2335 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2336 if (nlh == NULL)
2337 return -EMSGSIZE;
1da177e4 2338 upe = NLMSG_DATA(nlh);
1da177e4
LT		 2339
2340 copy_to_user_policy(xp, &upe->pol, dir);
2341 if (copy_to_user_tmpl(xp, skb) < 0)
2342 goto nlmsg_failure;
df71837d
TJ		 2343 if (copy_to_user_sec_ctx(xp, skb))
2344 goto nlmsg_failure;
1459bb36 2345 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2346 goto nlmsg_failure;
1da177e4
LT		 2347 upe->hard = !!hard;
2348
9825069d 2349 return nlmsg_end(skb, nlh);
1da177e4
LT		 2350
2351nlmsg_failure:
9825069d
TG		 2352 nlmsg_cancel(skb, nlh);
2353 return -EMSGSIZE;
1da177e4
LT		 2354}
2355
26b15dad 2356static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4
LT		 2357{
2358 struct sk_buff *skb;
2359 size_t len;
2360
2361 len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
2362 len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire));
661697f7 2363 len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security));
785fd8b8
JHS		 2364#ifdef CONFIG_XFRM_SUB_POLICY
2365 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2366#endif
1da177e4
LT		 2367 skb = alloc_skb(len, GFP_ATOMIC);
2368 if (skb == NULL)
2369 return -ENOMEM;
2370
d51d081d 2371 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2372 BUG();
2373
ac6d439d
PM		 2374 NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
2375 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2376}
2377
26b15dad
JHS		 2378static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2379{
2380 struct xfrm_userpolicy_info *p;
0603eac0 2381 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2382 struct nlmsghdr *nlh;
2383 struct sk_buff *skb;
26b15dad 2384 int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
0603eac0
HX		 2385 int headlen;
2386
2387 headlen = sizeof(*p);
2388 if (c->event == XFRM_MSG_DELPOLICY) {
2389 len += RTA_SPACE(headlen);
2390 headlen = sizeof(*id);
2391 }
334f3d45
JHS		 2392#ifdef CONFIG_XFRM_SUB_POLICY
2393 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
2394#endif
0603eac0 2395 len += NLMSG_SPACE(headlen);
26b15dad
JHS		 2396
2397 skb = alloc_skb(len, GFP_ATOMIC);
2398 if (skb == NULL)
2399 return -ENOMEM;
26b15dad 2400
79b8b7f4
TG		 2401 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2402 if (nlh == NULL)
2403 goto nlmsg_failure;
26b15dad
JHS		 2404
2405 p = NLMSG_DATA(nlh);
0603eac0
HX		 2406 if (c->event == XFRM_MSG_DELPOLICY) {
2407 id = NLMSG_DATA(nlh);
2408 memset(id, 0, sizeof(*id));
2409 id->dir = dir;
2410 if (c->data.byid)
2411 id->index = xp->index;
2412 else
2413 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2414
2415 p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p)));
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
ac6d439d
PM		 2426 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2427 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2428
2429nlmsg_failure:
0603eac0 2430rtattr_failure:
26b15dad
JHS		 2431 kfree_skb(skb);
2432 return -1;
2433}
2434
2435static int xfrm_notify_policy_flush(struct km_event *c)
2436{
2437 struct nlmsghdr *nlh;
2438 struct sk_buff *skb;
785fd8b8 2439 int len = 0;
f7b6983f 2440#ifdef CONFIG_XFRM_SUB_POLICY
785fd8b8 2441 len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type));
f7b6983f 2442#endif
785fd8b8 2443 len += NLMSG_LENGTH(0);
26b15dad
JHS		 2444
2445 skb = alloc_skb(len, GFP_ATOMIC);
2446 if (skb == NULL)
2447 return -ENOMEM;
26b15dad 2448
79b8b7f4
TG		 2449 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2450 if (nlh == NULL)
2451 goto nlmsg_failure;
0c51f53c
JHS		 2452 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2453 goto nlmsg_failure;
26b15dad 2454
9825069d 2455 nlmsg_end(skb, nlh);
26b15dad 2456
ac6d439d
PM		 2457 NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
2458 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2459
2460nlmsg_failure:
2461 kfree_skb(skb);
2462 return -1;
2463}
2464
2465static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2466{
2467
2468 switch (c->event) {
f60f6b8f
HX		 2469 case XFRM_MSG_NEWPOLICY:
2470 case XFRM_MSG_UPDPOLICY:
2471 case XFRM_MSG_DELPOLICY:
26b15dad 2472 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2473 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2474 return xfrm_notify_policy_flush(c);
f60f6b8f 2475 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2476 return xfrm_exp_policy_notify(xp, dir, c);
2477 default:
2478 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2479 }
2480
2481 return 0;
2482
2483}
2484
97a64b45
MN		 2485static int build_report(struct sk_buff *skb, u8 proto,
2486 struct xfrm_selector *sel, xfrm_address_t *addr)
2487{
2488 struct xfrm_user_report *ur;
2489 struct nlmsghdr *nlh;
97a64b45 2490
79b8b7f4
TG		 2491 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2492 if (nlh == NULL)
2493 return -EMSGSIZE;
97a64b45 2494 ur = NLMSG_DATA(nlh);
97a64b45
MN		 2495
2496 ur->proto = proto;
2497 memcpy(&ur->sel, sel, sizeof(ur->sel));
2498
2499 if (addr)
2500 RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
2501
9825069d 2502 return nlmsg_end(skb, nlh);
97a64b45 2503
97a64b45 2504rtattr_failure:
9825069d
TG		 2505 nlmsg_cancel(skb, nlh);
2506 return -EMSGSIZE;
97a64b45
MN		 2507}
2508
2509static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2510 xfrm_address_t *addr)
2511{
2512 struct sk_buff *skb;
2513 size_t len;
2514
2515 len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
2516 skb = alloc_skb(len, GFP_ATOMIC);
2517 if (skb == NULL)
2518 return -ENOMEM;
2519
2520 if (build_report(skb, proto, sel, addr) < 0)
2521 BUG();
2522
2523 NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT;
2524 return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
2525}
2526
1da177e4
LT		 2527static struct xfrm_mgr netlink_mgr = {
2528 .id = "netlink",
2529 .notify = xfrm_send_state_notify,
2530 .acquire = xfrm_send_acquire,
2531 .compile_policy = xfrm_compile_policy,
2532 .notify_policy = xfrm_send_policy_notify,
97a64b45 2533 .report = xfrm_send_report,
5c79de6e 2534 .migrate = xfrm_send_migrate,
1da177e4
LT		 2535};
2536
2537static int __init xfrm_user_init(void)
2538{
be33690d
PM		 2539 struct sock *nlsk;
2540
654b32c6 2541 printk(KERN_INFO "Initializing XFRM netlink socket\n");
1da177e4 2542
be33690d 2543 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
af65bdfc 2544 xfrm_netlink_rcv, NULL, THIS_MODULE);
be33690d 2545 if (nlsk == NULL)
1da177e4 2546 return -ENOMEM;
be33690d 2547 rcu_assign_pointer(xfrm_nl, nlsk);
1da177e4
LT		 2548
2549 xfrm_register_km(&netlink_mgr);
2550
2551 return 0;
2552}
2553
2554static void __exit xfrm_user_exit(void)
2555{
be33690d
PM		 2556 struct sock *nlsk = xfrm_nl;
2557
1da177e4 2558 xfrm_unregister_km(&netlink_mgr);
be33690d
PM		 2559 rcu_assign_pointer(xfrm_nl, NULL);
2560 synchronize_rcu();
2561 sock_release(nlsk->sk_socket);
1da177e4
LT		 2562}
2563
2564module_init(xfrm_user_init);
2565module_exit(xfrm_user_exit);
2566MODULE_LICENSE("GPL");
4fdb3bb7 2567MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 2568
Ubuntu Artful kernel mirror