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[XFRM] netlink: Rename attribute array from xfrma[] to attrs[]
[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/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
c26445ac
TG		 36static inline int alg_len(struct xfrm_algo *alg)
37{
38 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
39}
40
35a7aa08 41static int verify_one_alg(struct rtattr **attrs, enum xfrm_attr_type_t type)
1da177e4 42{
35a7aa08 43 struct rtattr *rt = attrs[type];
1da177e4
LT		 44 struct xfrm_algo *algp;
45
46 if (!rt)
47 return 0;
48
1da177e4 49 algp = RTA_DATA(rt);
cf5cb79f 50 if (RTA_PAYLOAD(rt) < alg_len(algp))
31c26852
HX		 51 return -EINVAL;
52
1da177e4
LT		 53 switch (type) {
54 case XFRMA_ALG_AUTH:
55 if (!algp->alg_key_len &&
56 strcmp(algp->alg_name, "digest_null") != 0)
57 return -EINVAL;
58 break;
59
60 case XFRMA_ALG_CRYPT:
61 if (!algp->alg_key_len &&
62 strcmp(algp->alg_name, "cipher_null") != 0)
63 return -EINVAL;
64 break;
65
66 case XFRMA_ALG_COMP:
67 /* Zero length keys are legal. */
68 break;
69
70 default:
71 return -EINVAL;
3ff50b79 72 }
1da177e4
LT		 73
74 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
75 return 0;
76}
77
35a7aa08 78static void verify_one_addr(struct rtattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 79 xfrm_address_t **addrp)
80{
35a7aa08 81 struct rtattr *rt = attrs[type];
eb2971b6 82
cf5cb79f 83 if (rt && addrp)
eb2971b6 84 *addrp = RTA_DATA(rt);
eb2971b6 85}
df71837d 86
35a7aa08 87static inline int verify_sec_ctx_len(struct rtattr **attrs)
df71837d 88{
35a7aa08 89 struct rtattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 90 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 91
92 if (!rt)
93 return 0;
94
df71837d 95 uctx = RTA_DATA(rt);
cf5cb79f 96 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 97 return -EINVAL;
98
99 return 0;
100}
101
102
1da177e4 103static int verify_newsa_info(struct xfrm_usersa_info *p,
35a7aa08 104 struct rtattr **attrs)
1da177e4
LT		 105{
106 int err;
107
108 err = -EINVAL;
109 switch (p->family) {
110 case AF_INET:
111 break;
112
113 case AF_INET6:
114#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
115 break;
116#else
117 err = -EAFNOSUPPORT;
118 goto out;
119#endif
120
121 default:
122 goto out;
3ff50b79 123 }
1da177e4
LT		 124
125 err = -EINVAL;
126 switch (p->id.proto) {
127 case IPPROTO_AH:
35a7aa08
TG		 128 if (!attrs[XFRMA_ALG_AUTH] ||
129 attrs[XFRMA_ALG_CRYPT] ||
130 attrs[XFRMA_ALG_COMP])
1da177e4
LT		 131 goto out;
132 break;
133
134 case IPPROTO_ESP:
35a7aa08
TG		 135 if ((!attrs[XFRMA_ALG_AUTH] &&
136 !attrs[XFRMA_ALG_CRYPT]) ||
137 attrs[XFRMA_ALG_COMP])
1da177e4
LT		 138 goto out;
139 break;
140
141 case IPPROTO_COMP:
35a7aa08
TG		 142 if (!attrs[XFRMA_ALG_COMP] ||
143 attrs[XFRMA_ALG_AUTH] ||
144 attrs[XFRMA_ALG_CRYPT])
1da177e4
LT		 145 goto out;
146 break;
147
e23c7194
MN		 148#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
149 case IPPROTO_DSTOPTS:
150 case IPPROTO_ROUTING:
35a7aa08
TG		 151 if (attrs[XFRMA_ALG_COMP] ||
152 attrs[XFRMA_ALG_AUTH] ||
153 attrs[XFRMA_ALG_CRYPT] ||
154 attrs[XFRMA_ENCAP] ||
155 attrs[XFRMA_SEC_CTX] ||
156 !attrs[XFRMA_COADDR])
e23c7194
MN		 157 goto out;
158 break;
159#endif
160
1da177e4
LT		 161 default:
162 goto out;
3ff50b79 163 }
1da177e4 164
35a7aa08 165 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 166 goto out;
35a7aa08 167 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 168 goto out;
35a7aa08 169 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 170 goto out;
35a7aa08 171 if ((err = verify_sec_ctx_len(attrs)))
df71837d 172 goto out;
1da177e4
LT		 173
174 err = -EINVAL;
175 switch (p->mode) {
7e49e6de
MN		 176 case XFRM_MODE_TRANSPORT:
177 case XFRM_MODE_TUNNEL:
060f02a3 178 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 179 case XFRM_MODE_BEET:
1da177e4
LT		 180 break;
181
182 default:
183 goto out;
3ff50b79 184 }
1da177e4
LT		 185
186 err = 0;
187
188out:
189 return err;
190}
191
192static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
193 struct xfrm_algo_desc *(*get_byname)(char *, int),
194 struct rtattr *u_arg)
195{
196 struct rtattr *rta = u_arg;
197 struct xfrm_algo *p, *ualg;
198 struct xfrm_algo_desc *algo;
199
200 if (!rta)
201 return 0;
202
203 ualg = RTA_DATA(rta);
204
205 algo = get_byname(ualg->alg_name, 1);
206 if (!algo)
207 return -ENOSYS;
208 *props = algo->desc.sadb_alg_id;
209
c26445ac 210 p = kmemdup(ualg, alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 211 if (!p)
212 return -ENOMEM;
213
04ff1260 214 strcpy(p->alg_name, algo->name);
1da177e4
LT		 215 *algpp = p;
216 return 0;
217}
218
219static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg)
220{
221 struct rtattr *rta = u_arg;
222 struct xfrm_encap_tmpl *p, *uencap;
223
224 if (!rta)
225 return 0;
226
227 uencap = RTA_DATA(rta);
cdbc6dae 228 p = kmemdup(uencap, sizeof(*p), GFP_KERNEL);
1da177e4
LT		 229 if (!p)
230 return -ENOMEM;
231
1da177e4
LT		 232 *encapp = p;
233 return 0;
234}
235
df71837d 236
661697f7 237static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 238{
df71837d
TJ		 239 int len = 0;
240
241 if (xfrm_ctx) {
242 len += sizeof(struct xfrm_user_sec_ctx);
243 len += xfrm_ctx->ctx_len;
244 }
245 return len;
246}
247
248static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg)
249{
250 struct xfrm_user_sec_ctx *uctx;
251
252 if (!u_arg)
253 return 0;
254
255 uctx = RTA_DATA(u_arg);
256 return security_xfrm_state_alloc(x, uctx);
257}
258
060f02a3
NT		 259static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg)
260{
261 struct rtattr *rta = u_arg;
262 xfrm_address_t *p, *uaddrp;
263
264 if (!rta)
265 return 0;
266
267 uaddrp = RTA_DATA(rta);
cdbc6dae 268 p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL);
060f02a3
NT		 269 if (!p)
270 return -ENOMEM;
271
060f02a3
NT		 272 *addrpp = p;
273 return 0;
274}
275
1da177e4
LT		 276static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
277{
278 memcpy(&x->id, &p->id, sizeof(x->id));
279 memcpy(&x->sel, &p->sel, sizeof(x->sel));
280 memcpy(&x->lft, &p->lft, sizeof(x->lft));
281 x->props.mode = p->mode;
282 x->props.replay_window = p->replay_window;
283 x->props.reqid = p->reqid;
284 x->props.family = p->family;
54489c14 285 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 286 x->props.flags = p->flags;
196b0036
HX		 287
288 /*
289 * Set inner address family if the KM left it as zero.
290 * See comment in validate_tmpl.
291 */
292 if (!x->sel.family)
293 x->sel.family = p->family;
1da177e4
LT		 294}
295
d51d081d
JHS		 296/*
297 * someday when pfkey also has support, we could have the code
298 * somehow made shareable and move it to xfrm_state.c - JHS
299 *
300*/
35a7aa08 301static void xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **attrs)
d51d081d 302{
35a7aa08
TG		 303 struct rtattr *rp = attrs[XFRMA_REPLAY_VAL];
304 struct rtattr *lt = attrs[XFRMA_LTIME_VAL];
305 struct rtattr *et = attrs[XFRMA_ETIMER_THRESH];
306 struct rtattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d
JHS		 307
308 if (rp) {
309 struct xfrm_replay_state *replay;
d51d081d
JHS		 310 replay = RTA_DATA(rp);
311 memcpy(&x->replay, replay, sizeof(*replay));
312 memcpy(&x->preplay, replay, sizeof(*replay));
313 }
314
315 if (lt) {
316 struct xfrm_lifetime_cur *ltime;
d51d081d
JHS		 317 ltime = RTA_DATA(lt);
318 x->curlft.bytes = ltime->bytes;
319 x->curlft.packets = ltime->packets;
320 x->curlft.add_time = ltime->add_time;
321 x->curlft.use_time = ltime->use_time;
322 }
323
cf5cb79f 324 if (et)
d51d081d 325 x->replay_maxage = *(u32*)RTA_DATA(et);
d51d081d 326
cf5cb79f 327 if (rt)
d51d081d 328 x->replay_maxdiff = *(u32*)RTA_DATA(rt);
d51d081d
JHS		 329}
330
1da177e4 331static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
35a7aa08 332 struct rtattr **attrs,
1da177e4
LT		 333 int *errp)
334{
335 struct xfrm_state *x = xfrm_state_alloc();
336 int err = -ENOMEM;
337
338 if (!x)
339 goto error_no_put;
340
341 copy_from_user_state(x, p);
342
343 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
344 xfrm_aalg_get_byname,
35a7aa08 345 attrs[XFRMA_ALG_AUTH])))
1da177e4
LT		 346 goto error;
347 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
348 xfrm_ealg_get_byname,
35a7aa08 349 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 350 goto error;
351 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
352 xfrm_calg_get_byname,
35a7aa08 353 attrs[XFRMA_ALG_COMP])))
1da177e4 354 goto error;
35a7aa08 355 if ((err = attach_encap_tmpl(&x->encap, attrs[XFRMA_ENCAP])))
1da177e4 356 goto error;
35a7aa08 357 if ((err = attach_one_addr(&x->coaddr, attrs[XFRMA_COADDR])))
060f02a3 358 goto error;
72cb6962 359 err = xfrm_init_state(x);
1da177e4
LT		 360 if (err)
361 goto error;
362
35a7aa08 363 if ((err = attach_sec_ctx(x, attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 364 goto error;
365
1da177e4 366 x->km.seq = p->seq;
d51d081d
JHS		 367 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
368 /* sysctl_xfrm_aevent_etime is in 100ms units */
369 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
370 x->preplay.bitmap = 0;
371 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
372 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
373
374 /* override default values from above */
375
35a7aa08 376 xfrm_update_ae_params(x, (struct rtattr **)attrs);
1da177e4
LT		 377
378 return x;
379
380error:
381 x->km.state = XFRM_STATE_DEAD;
382 xfrm_state_put(x);
383error_no_put:
384 *errp = err;
385 return NULL;
386}
387
22e70050 388static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 389 struct rtattr **attrs)
1da177e4 390{
7b67c857 391 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 392 struct xfrm_state *x;
393 int err;
26b15dad 394 struct km_event c;
1da177e4 395
35a7aa08 396 err = verify_newsa_info(p, attrs);
1da177e4
LT		 397 if (err)
398 return err;
399
35a7aa08 400 x = xfrm_state_construct(p, attrs, &err);
1da177e4
LT		 401 if (!x)
402 return err;
403
26b15dad 404 xfrm_state_hold(x);
1da177e4
LT		 405 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
406 err = xfrm_state_add(x);
407 else
408 err = xfrm_state_update(x);
409
161a09e7
JL		 410 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
411 AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x);
412
1da177e4
LT		 413 if (err < 0) {
414 x->km.state = XFRM_STATE_DEAD;
21380b81 415 __xfrm_state_put(x);
7d6dfe1f 416 goto out;
1da177e4
LT		 417 }
418
26b15dad
JHS		 419 c.seq = nlh->nlmsg_seq;
420 c.pid = nlh->nlmsg_pid;
f60f6b8f 421 c.event = nlh->nlmsg_type;
26b15dad
JHS		 422
423 km_state_notify(x, &c);
7d6dfe1f 424out:
26b15dad 425 xfrm_state_put(x);
1da177e4
LT		 426 return err;
427}
428
eb2971b6 429static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
35a7aa08 430 struct rtattr **attrs,
eb2971b6
MN		 431 int *errp)
432{
433 struct xfrm_state *x = NULL;
434 int err;
435
436 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
437 err = -ESRCH;
438 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
439 } else {
440 xfrm_address_t *saddr = NULL;
441
35a7aa08 442 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 443 if (!saddr) {
444 err = -EINVAL;
445 goto out;
446 }
447
9abbffee 448 err = -ESRCH;
eb2971b6
MN		 449 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
450 p->family);
451 }
452
453 out:
454 if (!x && errp)
455 *errp = err;
456 return x;
457}
458
22e70050 459static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 460 struct rtattr **attrs)
1da177e4
LT		 461{
462 struct xfrm_state *x;
eb2971b6 463 int err = -ESRCH;
26b15dad 464 struct km_event c;
7b67c857 465 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4 466
35a7aa08 467 x = xfrm_user_state_lookup(p, attrs, &err);
1da177e4 468 if (x == NULL)
eb2971b6 469 return err;
1da177e4 470
6f68dc37 471 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 472 goto out;
473
1da177e4 474 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 475 err = -EPERM;
476 goto out;
1da177e4
LT		 477 }
478
26b15dad 479 err = xfrm_state_delete(x);
161a09e7 480
c8c05a8e
CZ		 481 if (err < 0)
482 goto out;
26b15dad
JHS		 483
484 c.seq = nlh->nlmsg_seq;
485 c.pid = nlh->nlmsg_pid;
f60f6b8f 486 c.event = nlh->nlmsg_type;
26b15dad 487 km_state_notify(x, &c);
1da177e4 488
c8c05a8e 489out:
16bec31d
EP		 490 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
491 AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x);
c8c05a8e 492 xfrm_state_put(x);
26b15dad 493 return err;
1da177e4
LT		 494}
495
496static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
497{
498 memcpy(&p->id, &x->id, sizeof(p->id));
499 memcpy(&p->sel, &x->sel, sizeof(p->sel));
500 memcpy(&p->lft, &x->lft, sizeof(p->lft));
501 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
502 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 503 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 504 p->mode = x->props.mode;
505 p->replay_window = x->props.replay_window;
506 p->reqid = x->props.reqid;
507 p->family = x->props.family;
508 p->flags = x->props.flags;
509 p->seq = x->km.seq;
510}
511
512struct xfrm_dump_info {
513 struct sk_buff *in_skb;
514 struct sk_buff *out_skb;
515 u32 nlmsg_seq;
516 u16 nlmsg_flags;
517 int start_idx;
518 int this_idx;
519};
520
c0144bea
TG		 521static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
522{
523 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
524 struct xfrm_user_sec_ctx *uctx;
525 struct nlattr *attr;
526
527 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
528 if (attr == NULL)
529 return -EMSGSIZE;
530
531 uctx = nla_data(attr);
532 uctx->exttype = XFRMA_SEC_CTX;
533 uctx->len = ctx_size;
534 uctx->ctx_doi = s->ctx_doi;
535 uctx->ctx_alg = s->ctx_alg;
536 uctx->ctx_len = s->ctx_len;
537 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
538
539 return 0;
540}
541
1da177e4
LT		 542static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
543{
544 struct xfrm_dump_info *sp = ptr;
545 struct sk_buff *in_skb = sp->in_skb;
546 struct sk_buff *skb = sp->out_skb;
547 struct xfrm_usersa_info *p;
548 struct nlmsghdr *nlh;
1da177e4
LT		 549
550 if (sp->this_idx < sp->start_idx)
551 goto out;
552
79b8b7f4
TG		 553 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
554 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
555 if (nlh == NULL)
556 return -EMSGSIZE;
1da177e4 557
7b67c857 558 p = nlmsg_data(nlh);
1da177e4
LT		 559 copy_to_user_state(x, p);
560
561 if (x->aalg)
c26445ac 562 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
1da177e4 563 if (x->ealg)
c26445ac 564 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
1da177e4 565 if (x->calg)
c0144bea 566 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1da177e4
LT		 567
568 if (x->encap)
c0144bea 569 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1da177e4 570
c0144bea
TG		 571 if (x->security && copy_sec_ctx(x->security, skb) < 0)
572 goto nla_put_failure;
060f02a3
NT		 573
574 if (x->coaddr)
c0144bea 575 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
060f02a3 576
9afaca05 577 if (x->lastused)
c0144bea 578 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
9afaca05 579
9825069d 580 nlmsg_end(skb, nlh);
1da177e4
LT		 581out:
582 sp->this_idx++;
583 return 0;
584
c0144bea 585nla_put_failure:
9825069d
TG		 586 nlmsg_cancel(skb, nlh);
587 return -EMSGSIZE;
1da177e4
LT		 588}
589
590static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
591{
592 struct xfrm_dump_info info;
593
594 info.in_skb = cb->skb;
595 info.out_skb = skb;
596 info.nlmsg_seq = cb->nlh->nlmsg_seq;
597 info.nlmsg_flags = NLM_F_MULTI;
598 info.this_idx = 0;
599 info.start_idx = cb->args[0];
dc00a525 600 (void) xfrm_state_walk(0, dump_one_state, &info);
1da177e4
LT		 601 cb->args[0] = info.this_idx;
602
603 return skb->len;
604}
605
606static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
607 struct xfrm_state *x, u32 seq)
608{
609 struct xfrm_dump_info info;
610 struct sk_buff *skb;
611
7deb2264 612 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 613 if (!skb)
614 return ERR_PTR(-ENOMEM);
615
1da177e4
LT		 616 info.in_skb = in_skb;
617 info.out_skb = skb;
618 info.nlmsg_seq = seq;
619 info.nlmsg_flags = 0;
620 info.this_idx = info.start_idx = 0;
621
622 if (dump_one_state(x, 0, &info)) {
623 kfree_skb(skb);
624 return NULL;
625 }
626
627 return skb;
628}
629
7deb2264
TG		 630static inline size_t xfrm_spdinfo_msgsize(void)
631{
632 return NLMSG_ALIGN(4)
633 + nla_total_size(sizeof(struct xfrmu_spdinfo))
634 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
635}
636
ecfd6b18
JHS		 637static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
638{
5a6d3416
JHS		 639 struct xfrmk_spdinfo si;
640 struct xfrmu_spdinfo spc;
641 struct xfrmu_spdhinfo sph;
ecfd6b18
JHS		 642 struct nlmsghdr *nlh;
643 u32 *f;
644
645 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
646 if (nlh == NULL) /* shouldnt really happen ... */
647 return -EMSGSIZE;
648
649 f = nlmsg_data(nlh);
650 *f = flags;
651 xfrm_spd_getinfo(&si);
5a6d3416
JHS		 652 spc.incnt = si.incnt;
653 spc.outcnt = si.outcnt;
654 spc.fwdcnt = si.fwdcnt;
655 spc.inscnt = si.inscnt;
656 spc.outscnt = si.outscnt;
657 spc.fwdscnt = si.fwdscnt;
658 sph.spdhcnt = si.spdhcnt;
659 sph.spdhmcnt = si.spdhmcnt;
660
661 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
662 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
ecfd6b18
JHS		 663
664 return nlmsg_end(skb, nlh);
665
666nla_put_failure:
667 nlmsg_cancel(skb, nlh);
668 return -EMSGSIZE;
669}
670
671static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 672 struct rtattr **attrs)
ecfd6b18
JHS		 673{
674 struct sk_buff *r_skb;
7b67c857 675 u32 *flags = nlmsg_data(nlh);
ecfd6b18
JHS		 676 u32 spid = NETLINK_CB(skb).pid;
677 u32 seq = nlh->nlmsg_seq;
ecfd6b18 678
7deb2264 679 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 680 if (r_skb == NULL)
681 return -ENOMEM;
682
683 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
684 BUG();
685
686 return nlmsg_unicast(xfrm_nl, r_skb, spid);
687}
688
7deb2264
TG		 689static inline size_t xfrm_sadinfo_msgsize(void)
690{
691 return NLMSG_ALIGN(4)
692 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
693 + nla_total_size(4); /* XFRMA_SAD_CNT */
694}
695
28d8909b
JHS		 696static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
697{
af11e316
JHS		 698 struct xfrmk_sadinfo si;
699 struct xfrmu_sadhinfo sh;
28d8909b
JHS		 700 struct nlmsghdr *nlh;
701 u32 *f;
702
703 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
704 if (nlh == NULL) /* shouldnt really happen ... */
705 return -EMSGSIZE;
706
707 f = nlmsg_data(nlh);
708 *f = flags;
709 xfrm_sad_getinfo(&si);
710
af11e316
JHS		 711 sh.sadhmcnt = si.sadhmcnt;
712 sh.sadhcnt = si.sadhcnt;
713
714 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
715 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
28d8909b
JHS		 716
717 return nlmsg_end(skb, nlh);
718
719nla_put_failure:
720 nlmsg_cancel(skb, nlh);
721 return -EMSGSIZE;
722}
723
724static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 725 struct rtattr **attrs)
28d8909b
JHS		 726{
727 struct sk_buff *r_skb;
7b67c857 728 u32 *flags = nlmsg_data(nlh);
28d8909b
JHS		 729 u32 spid = NETLINK_CB(skb).pid;
730 u32 seq = nlh->nlmsg_seq;
28d8909b 731
7deb2264 732 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 733 if (r_skb == NULL)
734 return -ENOMEM;
735
736 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
737 BUG();
738
739 return nlmsg_unicast(xfrm_nl, r_skb, spid);
740}
741
22e70050 742static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 743 struct rtattr **attrs)
1da177e4 744{
7b67c857 745 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 746 struct xfrm_state *x;
747 struct sk_buff *resp_skb;
eb2971b6 748 int err = -ESRCH;
1da177e4 749
35a7aa08 750 x = xfrm_user_state_lookup(p, attrs, &err);
1da177e4
LT		 751 if (x == NULL)
752 goto out_noput;
753
754 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
755 if (IS_ERR(resp_skb)) {
756 err = PTR_ERR(resp_skb);
757 } else {
082a1ad5 758 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 759 }
760 xfrm_state_put(x);
761out_noput:
762 return err;
763}
764
765static int verify_userspi_info(struct xfrm_userspi_info *p)
766{
767 switch (p->info.id.proto) {
768 case IPPROTO_AH:
769 case IPPROTO_ESP:
770 break;
771
772 case IPPROTO_COMP:
773 /* IPCOMP spi is 16-bits. */
774 if (p->max >= 0x10000)
775 return -EINVAL;
776 break;
777
778 default:
779 return -EINVAL;
3ff50b79 780 }
1da177e4
LT		 781
782 if (p->min > p->max)
783 return -EINVAL;
784
785 return 0;
786}
787
22e70050 788static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 789 struct rtattr **attrs)
1da177e4
LT		 790{
791 struct xfrm_state *x;
792 struct xfrm_userspi_info *p;
793 struct sk_buff *resp_skb;
794 xfrm_address_t *daddr;
795 int family;
796 int err;
797
7b67c857 798 p = nlmsg_data(nlh);
1da177e4
LT		 799 err = verify_userspi_info(p);
800 if (err)
801 goto out_noput;
802
803 family = p->info.family;
804 daddr = &p->info.id.daddr;
805
806 x = NULL;
807 if (p->info.seq) {
808 x = xfrm_find_acq_byseq(p->info.seq);
809 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
810 xfrm_state_put(x);
811 x = NULL;
812 }
813 }
814
815 if (!x)
816 x = xfrm_find_acq(p->info.mode, p->info.reqid,
817 p->info.id.proto, daddr,
818 &p->info.saddr, 1,
819 family);
820 err = -ENOENT;
821 if (x == NULL)
822 goto out_noput;
823
824 resp_skb = ERR_PTR(-ENOENT);
825
826 spin_lock_bh(&x->lock);
827 if (x->km.state != XFRM_STATE_DEAD) {
828 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
829 if (x->id.spi)
830 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
831 }
832 spin_unlock_bh(&x->lock);
833
834 if (IS_ERR(resp_skb)) {
835 err = PTR_ERR(resp_skb);
836 goto out;
837 }
838
082a1ad5 839 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 840
841out:
842 xfrm_state_put(x);
843out_noput:
844 return err;
845}
846
b798a9ed 847static int verify_policy_dir(u8 dir)
1da177e4
LT		 848{
849 switch (dir) {
850 case XFRM_POLICY_IN:
851 case XFRM_POLICY_OUT:
852 case XFRM_POLICY_FWD:
853 break;
854
855 default:
856 return -EINVAL;
3ff50b79 857 }
1da177e4
LT		 858
859 return 0;
860}
861
b798a9ed 862static int verify_policy_type(u8 type)
f7b6983f
MN		 863{
864 switch (type) {
865 case XFRM_POLICY_TYPE_MAIN:
866#ifdef CONFIG_XFRM_SUB_POLICY
867 case XFRM_POLICY_TYPE_SUB:
868#endif
869 break;
870
871 default:
872 return -EINVAL;
3ff50b79 873 }
f7b6983f
MN		 874
875 return 0;
876}
877
1da177e4
LT		 878static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
879{
880 switch (p->share) {
881 case XFRM_SHARE_ANY:
882 case XFRM_SHARE_SESSION:
883 case XFRM_SHARE_USER:
884 case XFRM_SHARE_UNIQUE:
885 break;
886
887 default:
888 return -EINVAL;
3ff50b79 889 }
1da177e4
LT		 890
891 switch (p->action) {
892 case XFRM_POLICY_ALLOW:
893 case XFRM_POLICY_BLOCK:
894 break;
895
896 default:
897 return -EINVAL;
3ff50b79 898 }
1da177e4
LT		 899
900 switch (p->sel.family) {
901 case AF_INET:
902 break;
903
904 case AF_INET6:
905#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
906 break;
907#else
908 return -EAFNOSUPPORT;
909#endif
910
911 default:
912 return -EINVAL;
3ff50b79 913 }
1da177e4
LT		 914
915 return verify_policy_dir(p->dir);
916}
917
35a7aa08 918static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **attrs)
df71837d 919{
35a7aa08 920 struct rtattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 921 struct xfrm_user_sec_ctx *uctx;
922
923 if (!rt)
924 return 0;
925
926 uctx = RTA_DATA(rt);
927 return security_xfrm_policy_alloc(pol, uctx);
928}
929
1da177e4
LT		 930static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
931 int nr)
932{
933 int i;
934
935 xp->xfrm_nr = nr;
936 for (i = 0; i < nr; i++, ut++) {
937 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
938
939 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
940 memcpy(&t->saddr, &ut->saddr,
941 sizeof(xfrm_address_t));
942 t->reqid = ut->reqid;
943 t->mode = ut->mode;
944 t->share = ut->share;
945 t->optional = ut->optional;
946 t->aalgos = ut->aalgos;
947 t->ealgos = ut->ealgos;
948 t->calgos = ut->calgos;
8511d01d 949 t->encap_family = ut->family;
1da177e4
LT		 950 }
951}
952
b4ad86bf
DM		 953static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
954{
955 int i;
956
957 if (nr > XFRM_MAX_DEPTH)
958 return -EINVAL;
959
960 for (i = 0; i < nr; i++) {
961 /* We never validated the ut->family value, so many
962 * applications simply leave it at zero. The check was
963 * never made and ut->family was ignored because all
964 * templates could be assumed to have the same family as
965 * the policy itself. Now that we will have ipv4-in-ipv6
966 * and ipv6-in-ipv4 tunnels, this is no longer true.
967 */
968 if (!ut[i].family)
969 ut[i].family = family;
970
971 switch (ut[i].family) {
972 case AF_INET:
973 break;
974#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
975 case AF_INET6:
976 break;
977#endif
978 default:
979 return -EINVAL;
3ff50b79 980 }
b4ad86bf
DM		 981 }
982
983 return 0;
984}
985
35a7aa08 986static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **attrs)
1da177e4 987{
35a7aa08 988 struct rtattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 989
990 if (!rt) {
991 pol->xfrm_nr = 0;
992 } else {
b4ad86bf
DM		 993 struct xfrm_user_tmpl *utmpl = RTA_DATA(rt);
994 int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl);
995 int err;
1da177e4 996
b4ad86bf
DM		 997 err = validate_tmpl(nr, utmpl, pol->family);
998 if (err)
999 return err;
1da177e4
LT		 1000
1001 copy_templates(pol, RTA_DATA(rt), nr);
1002 }
1003 return 0;
1004}
1005
35a7aa08 1006static int copy_from_user_policy_type(u8 *tp, struct rtattr **attrs)
f7b6983f 1007{
35a7aa08 1008 struct rtattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 1009 struct xfrm_userpolicy_type *upt;
b798a9ed 1010 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 1011 int err;
1012
1013 if (rt) {
f7b6983f
MN		 1014 upt = RTA_DATA(rt);
1015 type = upt->type;
1016 }
1017
1018 err = verify_policy_type(type);
1019 if (err)
1020 return err;
1021
1022 *tp = type;
1023 return 0;
1024}
1025
1da177e4
LT		 1026static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1027{
1028 xp->priority = p->priority;
1029 xp->index = p->index;
1030 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1031 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1032 xp->action = p->action;
1033 xp->flags = p->flags;
1034 xp->family = p->sel.family;
1035 /* XXX xp->share = p->share; */
1036}
1037
1038static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1039{
1040 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1041 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1042 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1043 p->priority = xp->priority;
1044 p->index = xp->index;
1045 p->sel.family = xp->family;
1046 p->dir = dir;
1047 p->action = xp->action;
1048 p->flags = xp->flags;
1049 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1050}
1051
35a7aa08 1052static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct rtattr **attrs, int *errp)
1da177e4
LT		 1053{
1054 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1055 int err;
1056
1057 if (!xp) {
1058 *errp = -ENOMEM;
1059 return NULL;
1060 }
1061
1062 copy_from_user_policy(xp, p);
df71837d 1063
35a7aa08 1064 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1065 if (err)
1066 goto error;
1067
35a7aa08
TG		 1068 if (!(err = copy_from_user_tmpl(xp, attrs)))
1069 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1070 if (err)
1071 goto error;
1da177e4
LT		 1072
1073 return xp;
f7b6983f
MN		 1074 error:
1075 *errp = err;
1076 kfree(xp);
1077 return NULL;
1da177e4
LT		 1078}
1079
22e70050 1080static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1081 struct rtattr **attrs)
1da177e4 1082{
7b67c857 1083 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1084 struct xfrm_policy *xp;
26b15dad 1085 struct km_event c;
1da177e4
LT		 1086 int err;
1087 int excl;
1088
1089 err = verify_newpolicy_info(p);
df71837d
TJ		 1090 if (err)
1091 return err;
35a7aa08 1092 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1093 if (err)
1094 return err;
1095
35a7aa08 1096 xp = xfrm_policy_construct(p, attrs, &err);
1da177e4
LT		 1097 if (!xp)
1098 return err;
1099
26b15dad
JHS		 1100 /* shouldnt excl be based on nlh flags??
1101 * Aha! this is anti-netlink really i.e more pfkey derived
1102 * in netlink excl is a flag and you wouldnt need
1103 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1104 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1105 err = xfrm_policy_insert(p->dir, xp, excl);
161a09e7
JL		 1106 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1107 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1108
1da177e4 1109 if (err) {
5f8ac64b 1110 security_xfrm_policy_free(xp);
1da177e4
LT		 1111 kfree(xp);
1112 return err;
1113 }
1114
f60f6b8f 1115 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1116 c.seq = nlh->nlmsg_seq;
1117 c.pid = nlh->nlmsg_pid;
1118 km_policy_notify(xp, p->dir, &c);
1119
1da177e4
LT		 1120 xfrm_pol_put(xp);
1121
1122 return 0;
1123}
1124
1125static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1126{
1127 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1128 int i;
1129
1130 if (xp->xfrm_nr == 0)
1131 return 0;
1132
1133 for (i = 0; i < xp->xfrm_nr; i++) {
1134 struct xfrm_user_tmpl *up = &vec[i];
1135 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1136
1137 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1138 up->family = kp->encap_family;
1da177e4
LT		 1139 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1140 up->reqid = kp->reqid;
1141 up->mode = kp->mode;
1142 up->share = kp->share;
1143 up->optional = kp->optional;
1144 up->aalgos = kp->aalgos;
1145 up->ealgos = kp->ealgos;
1146 up->calgos = kp->calgos;
1147 }
df71837d 1148
c0144bea
TG		 1149 return nla_put(skb, XFRMA_TMPL,
1150 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1151}
1152
1153static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1154{
1155 if (x->security) {
1156 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1157 }
1158 return 0;
0d681623 1159}
df71837d 1160
0d681623
SH		 1161static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1162{
1163 if (xp->security) {
1164 return copy_sec_ctx(xp->security, skb);
1165 }
1166 return 0;
df71837d 1167}
cfbfd45a
TG		 1168static inline size_t userpolicy_type_attrsize(void)
1169{
1170#ifdef CONFIG_XFRM_SUB_POLICY
1171 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1172#else
1173 return 0;
1174#endif
1175}
df71837d 1176
f7b6983f 1177#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1178static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1179{
c0144bea
TG		 1180 struct xfrm_userpolicy_type upt = {
1181 .type = type,
1182 };
f7b6983f 1183
c0144bea 1184 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1185}
1186
1187#else
b798a9ed 1188static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1189{
1190 return 0;
1191}
1192#endif
1193
1da177e4
LT		 1194static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1195{
1196 struct xfrm_dump_info *sp = ptr;
1197 struct xfrm_userpolicy_info *p;
1198 struct sk_buff *in_skb = sp->in_skb;
1199 struct sk_buff *skb = sp->out_skb;
1200 struct nlmsghdr *nlh;
1da177e4
LT		 1201
1202 if (sp->this_idx < sp->start_idx)
1203 goto out;
1204
79b8b7f4
TG		 1205 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1206 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1207 if (nlh == NULL)
1208 return -EMSGSIZE;
1da177e4 1209
7b67c857 1210 p = nlmsg_data(nlh);
1da177e4
LT		 1211 copy_to_user_policy(xp, p, dir);
1212 if (copy_to_user_tmpl(xp, skb) < 0)
1213 goto nlmsg_failure;
df71837d
TJ		 1214 if (copy_to_user_sec_ctx(xp, skb))
1215 goto nlmsg_failure;
1459bb36 1216 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 1217 goto nlmsg_failure;
1da177e4 1218
9825069d 1219 nlmsg_end(skb, nlh);
1da177e4
LT		 1220out:
1221 sp->this_idx++;
1222 return 0;
1223
1224nlmsg_failure:
9825069d
TG		 1225 nlmsg_cancel(skb, nlh);
1226 return -EMSGSIZE;
1da177e4
LT		 1227}
1228
1229static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1230{
1231 struct xfrm_dump_info info;
1232
1233 info.in_skb = cb->skb;
1234 info.out_skb = skb;
1235 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1236 info.nlmsg_flags = NLM_F_MULTI;
1237 info.this_idx = 0;
1238 info.start_idx = cb->args[0];
f7b6983f
MN		 1239 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1240#ifdef CONFIG_XFRM_SUB_POLICY
1241 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1242#endif
1da177e4
LT		 1243 cb->args[0] = info.this_idx;
1244
1245 return skb->len;
1246}
1247
1248static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1249 struct xfrm_policy *xp,
1250 int dir, u32 seq)
1251{
1252 struct xfrm_dump_info info;
1253 struct sk_buff *skb;
1254
7deb2264 1255 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1256 if (!skb)
1257 return ERR_PTR(-ENOMEM);
1258
1da177e4
LT		 1259 info.in_skb = in_skb;
1260 info.out_skb = skb;
1261 info.nlmsg_seq = seq;
1262 info.nlmsg_flags = 0;
1263 info.this_idx = info.start_idx = 0;
1264
1265 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1266 kfree_skb(skb);
1267 return NULL;
1268 }
1269
1270 return skb;
1271}
1272
22e70050 1273static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1274 struct rtattr **attrs)
1da177e4
LT		 1275{
1276 struct xfrm_policy *xp;
1277 struct xfrm_userpolicy_id *p;
b798a9ed 1278 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1279 int err;
26b15dad 1280 struct km_event c;
1da177e4
LT		 1281 int delete;
1282
7b67c857 1283 p = nlmsg_data(nlh);
1da177e4
LT		 1284 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1285
35a7aa08 1286 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1287 if (err)
1288 return err;
1289
1da177e4
LT		 1290 err = verify_policy_dir(p->dir);
1291 if (err)
1292 return err;
1293
1294 if (p->index)
ef41aaa0 1295 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
df71837d 1296 else {
35a7aa08 1297 struct rtattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1298 struct xfrm_policy tmp;
1299
35a7aa08 1300 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1301 if (err)
1302 return err;
1303
1304 memset(&tmp, 0, sizeof(struct xfrm_policy));
1305 if (rt) {
1306 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1307
1308 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1309 return err;
1310 }
ef41aaa0
EP		 1311 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1312 delete, &err);
df71837d
TJ		 1313 security_xfrm_policy_free(&tmp);
1314 }
1da177e4
LT		 1315 if (xp == NULL)
1316 return -ENOENT;
1317
1318 if (!delete) {
1319 struct sk_buff *resp_skb;
1320
1321 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1322 if (IS_ERR(resp_skb)) {
1323 err = PTR_ERR(resp_skb);
1324 } else {
082a1ad5
TG		 1325 err = nlmsg_unicast(xfrm_nl, resp_skb,
1326 NETLINK_CB(skb).pid);
1da177e4 1327 }
26b15dad 1328 } else {
13fcfbb0
DM		 1329 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1330 AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL);
1331
1332 if (err != 0)
c8c05a8e 1333 goto out;
13fcfbb0 1334
e7443892 1335 c.data.byid = p->index;
f60f6b8f 1336 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1337 c.seq = nlh->nlmsg_seq;
1338 c.pid = nlh->nlmsg_pid;
1339 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1340 }
1341
c8c05a8e 1342out:
ef41aaa0 1343 xfrm_pol_put(xp);
1da177e4
LT		 1344 return err;
1345}
1346
22e70050 1347static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1348 struct rtattr **attrs)
1da177e4 1349{
26b15dad 1350 struct km_event c;
7b67c857 1351 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1352 struct xfrm_audit audit_info;
4aa2e62c 1353 int err;
1da177e4 1354
161a09e7
JL		 1355 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1356 audit_info.secid = NETLINK_CB(skb).sid;
4aa2e62c
JL		 1357 err = xfrm_state_flush(p->proto, &audit_info);
1358 if (err)
1359 return err;
bf08867f 1360 c.data.proto = p->proto;
f60f6b8f 1361 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1362 c.seq = nlh->nlmsg_seq;
1363 c.pid = nlh->nlmsg_pid;
1364 km_state_notify(NULL, &c);
1365
1da177e4
LT		 1366 return 0;
1367}
1368
7deb2264
TG		 1369static inline size_t xfrm_aevent_msgsize(void)
1370{
1371 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1372 + nla_total_size(sizeof(struct xfrm_replay_state))
1373 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1374 + nla_total_size(4) /* XFRM_AE_RTHR */
1375 + nla_total_size(4); /* XFRM_AE_ETHR */
1376}
d51d081d
JHS		 1377
1378static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1379{
1380 struct xfrm_aevent_id *id;
1381 struct nlmsghdr *nlh;
d51d081d 1382
79b8b7f4
TG		 1383 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1384 if (nlh == NULL)
1385 return -EMSGSIZE;
d51d081d 1386
7b67c857 1387 id = nlmsg_data(nlh);
2b5f6dcc 1388 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1389 id->sa_id.spi = x->id.spi;
1390 id->sa_id.family = x->props.family;
1391 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1392 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1393 id->reqid = x->props.reqid;
d51d081d
JHS		 1394 id->flags = c->data.aevent;
1395
c0144bea
TG		 1396 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1397 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
d51d081d 1398
c0144bea
TG		 1399 if (id->flags & XFRM_AE_RTHR)
1400 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
d51d081d 1401
c0144bea
TG		 1402 if (id->flags & XFRM_AE_ETHR)
1403 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1404 x->replay_maxage * 10 / HZ);
d51d081d 1405
9825069d 1406 return nlmsg_end(skb, nlh);
d51d081d 1407
c0144bea 1408nla_put_failure:
9825069d
TG		 1409 nlmsg_cancel(skb, nlh);
1410 return -EMSGSIZE;
d51d081d
JHS		 1411}
1412
22e70050 1413static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1414 struct rtattr **attrs)
d51d081d
JHS		 1415{
1416 struct xfrm_state *x;
1417 struct sk_buff *r_skb;
1418 int err;
1419 struct km_event c;
7b67c857 1420 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1421 struct xfrm_usersa_id *id = &p->sa_id;
1422
7deb2264 1423 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 1424 if (r_skb == NULL)
1425 return -ENOMEM;
1426
1427 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1428 if (x == NULL) {
b08d5840 1429 kfree_skb(r_skb);
d51d081d
JHS		 1430 return -ESRCH;
1431 }
1432
1433 /*
1434 * XXX: is this lock really needed - none of the other
1435 * gets lock (the concern is things getting updated
1436 * while we are still reading) - jhs
1437 */
1438 spin_lock_bh(&x->lock);
1439 c.data.aevent = p->flags;
1440 c.seq = nlh->nlmsg_seq;
1441 c.pid = nlh->nlmsg_pid;
1442
1443 if (build_aevent(r_skb, x, &c) < 0)
1444 BUG();
082a1ad5 1445 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
d51d081d
JHS		 1446 spin_unlock_bh(&x->lock);
1447 xfrm_state_put(x);
1448 return err;
1449}
1450
22e70050 1451static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1452 struct rtattr **attrs)
d51d081d
JHS		 1453{
1454 struct xfrm_state *x;
1455 struct km_event c;
1456 int err = - EINVAL;
7b67c857 1457 struct xfrm_aevent_id *p = nlmsg_data(nlh);
35a7aa08
TG		 1458 struct rtattr *rp = attrs[XFRMA_REPLAY_VAL];
1459 struct rtattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d
JHS		 1460
1461 if (!lt && !rp)
1462 return err;
1463
1464 /* pedantic mode - thou shalt sayeth replaceth */
1465 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1466 return err;
1467
1468 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1469 if (x == NULL)
1470 return -ESRCH;
1471
1472 if (x->km.state != XFRM_STATE_VALID)
1473 goto out;
1474
1475 spin_lock_bh(&x->lock);
35a7aa08 1476 xfrm_update_ae_params(x, attrs);
d51d081d 1477 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1478
1479 c.event = nlh->nlmsg_type;
1480 c.seq = nlh->nlmsg_seq;
1481 c.pid = nlh->nlmsg_pid;
1482 c.data.aevent = XFRM_AE_CU;
1483 km_state_notify(x, &c);
1484 err = 0;
1485out:
1486 xfrm_state_put(x);
1487 return err;
1488}
1489
22e70050 1490static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1491 struct rtattr **attrs)
1da177e4 1492{
f7b6983f 1493 struct km_event c;
b798a9ed 1494 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1495 int err;
161a09e7 1496 struct xfrm_audit audit_info;
f7b6983f 1497
35a7aa08 1498 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1499 if (err)
1500 return err;
26b15dad 1501
161a09e7
JL		 1502 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1503 audit_info.secid = NETLINK_CB(skb).sid;
4aa2e62c
JL		 1504 err = xfrm_policy_flush(type, &audit_info);
1505 if (err)
1506 return err;
f7b6983f 1507 c.data.type = type;
f60f6b8f 1508 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1509 c.seq = nlh->nlmsg_seq;
1510 c.pid = nlh->nlmsg_pid;
1511 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1512 return 0;
1513}
1514
22e70050 1515static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1516 struct rtattr **attrs)
6c5c8ca7
JHS		 1517{
1518 struct xfrm_policy *xp;
7b67c857 1519 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1520 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1521 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7
JHS		 1522 int err = -ENOENT;
1523
35a7aa08 1524 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1525 if (err)
1526 return err;
1527
6c5c8ca7 1528 if (p->index)
ef41aaa0 1529 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
6c5c8ca7 1530 else {
35a7aa08 1531 struct rtattr *rt = attrs[XFRMA_SEC_CTX];
6c5c8ca7
JHS		 1532 struct xfrm_policy tmp;
1533
35a7aa08 1534 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1535 if (err)
1536 return err;
1537
1538 memset(&tmp, 0, sizeof(struct xfrm_policy));
1539 if (rt) {
1540 struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt);
1541
1542 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1543 return err;
1544 }
ef41aaa0
EP		 1545 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1546 0, &err);
6c5c8ca7
JHS		 1547 security_xfrm_policy_free(&tmp);
1548 }
1549
1550 if (xp == NULL)
ef41aaa0
EP		 1551 return -ENOENT;
1552 read_lock(&xp->lock);
6c5c8ca7
JHS		 1553 if (xp->dead) {
1554 read_unlock(&xp->lock);
1555 goto out;
1556 }
1557
1558 read_unlock(&xp->lock);
1559 err = 0;
1560 if (up->hard) {
1561 xfrm_policy_delete(xp, p->dir);
161a09e7
JL		 1562 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1563 AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL);
1564
6c5c8ca7
JHS		 1565 } else {
1566 // reset the timers here?
1567 printk("Dont know what to do with soft policy expire\n");
1568 }
1569 km_policy_expired(xp, p->dir, up->hard, current->pid);
1570
1571out:
1572 xfrm_pol_put(xp);
1573 return err;
1574}
1575
22e70050 1576static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1577 struct rtattr **attrs)
53bc6b4d
JHS		 1578{
1579 struct xfrm_state *x;
1580 int err;
7b67c857 1581 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d
JHS		 1582 struct xfrm_usersa_info *p = &ue->state;
1583
1584 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1585
3a765aa5 1586 err = -ENOENT;
53bc6b4d
JHS		 1587 if (x == NULL)
1588 return err;
1589
53bc6b4d 1590 spin_lock_bh(&x->lock);
3a765aa5 1591 err = -EINVAL;
53bc6b4d
JHS		 1592 if (x->km.state != XFRM_STATE_VALID)
1593 goto out;
1594 km_state_expired(x, ue->hard, current->pid);
1595
161a09e7 1596 if (ue->hard) {
53bc6b4d 1597 __xfrm_state_delete(x);
161a09e7
JL		 1598 xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid,
1599 AUDIT_MAC_IPSEC_DELSA, 1, NULL, x);
1600 }
3a765aa5 1601 err = 0;
53bc6b4d
JHS		 1602out:
1603 spin_unlock_bh(&x->lock);
1604 xfrm_state_put(x);
1605 return err;
1606}
1607
22e70050 1608static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1609 struct rtattr **attrs)
980ebd25
JHS		 1610{
1611 struct xfrm_policy *xp;
1612 struct xfrm_user_tmpl *ut;
1613 int i;
35a7aa08 1614 struct rtattr *rt = attrs[XFRMA_TMPL];
980ebd25 1615
7b67c857 1616 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
980ebd25
JHS		 1617 struct xfrm_state *x = xfrm_state_alloc();
1618 int err = -ENOMEM;
1619
1620 if (!x)
1621 return err;
1622
1623 err = verify_newpolicy_info(&ua->policy);
1624 if (err) {
1625 printk("BAD policy passed\n");
1626 kfree(x);
1627 return err;
1628 }
1629
1630 /* build an XP */
35a7aa08 1631 xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) attrs, &err);
b4ad86bf 1632 if (!xp) {
980ebd25
JHS		 1633 kfree(x);
1634 return err;
1635 }
1636
1637 memcpy(&x->id, &ua->id, sizeof(ua->id));
1638 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1639 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1640
1641 ut = RTA_DATA(rt);
1642 /* extract the templates and for each call km_key */
1643 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1644 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1645 memcpy(&x->id, &t->id, sizeof(x->id));
1646 x->props.mode = t->mode;
1647 x->props.reqid = t->reqid;
1648 x->props.family = ut->family;
1649 t->aalgos = ua->aalgos;
1650 t->ealgos = ua->ealgos;
1651 t->calgos = ua->calgos;
1652 err = km_query(x, t, xp);
1653
1654 }
1655
1656 kfree(x);
1657 kfree(xp);
1658
1659 return 0;
1660}
1661
5c79de6e 1662#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 1663static int copy_from_user_migrate(struct xfrm_migrate *ma,
35a7aa08 1664 struct rtattr **attrs, int *num)
5c79de6e 1665{
35a7aa08 1666 struct rtattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 1667 struct xfrm_user_migrate *um;
1668 int i, num_migrate;
1669
1670 um = RTA_DATA(rt);
1671 num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um);
1672
1673 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1674 return -EINVAL;
1675
1676 for (i = 0; i < num_migrate; i++, um++, ma++) {
1677 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1678 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1679 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1680 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1681
1682 ma->proto = um->proto;
1683 ma->mode = um->mode;
1684 ma->reqid = um->reqid;
1685
1686 ma->old_family = um->old_family;
1687 ma->new_family = um->new_family;
1688 }
1689
1690 *num = i;
1691 return 0;
1692}
1693
1694static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1695 struct rtattr **attrs)
5c79de6e 1696{
7b67c857 1697 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e
SS		 1698 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1699 u8 type;
1700 int err;
1701 int n = 0;
1702
35a7aa08 1703 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 1704 return -EINVAL;
5c79de6e 1705
35a7aa08 1706 err = copy_from_user_policy_type(&type, (struct rtattr **)attrs);
5c79de6e
SS		 1707 if (err)
1708 return err;
1709
1710 err = copy_from_user_migrate((struct xfrm_migrate *)m,
35a7aa08 1711 (struct rtattr **)attrs, &n);
5c79de6e
SS		 1712 if (err)
1713 return err;
1714
1715 if (!n)
1716 return 0;
1717
1718 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1719
1720 return 0;
1721}
1722#else
1723static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
35a7aa08 1724 struct rtattr **attrs)
5c79de6e
SS		 1725{
1726 return -ENOPROTOOPT;
1727}
1728#endif
1729
1730#ifdef CONFIG_XFRM_MIGRATE
1731static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1732{
1733 struct xfrm_user_migrate um;
1734
1735 memset(&um, 0, sizeof(um));
1736 um.proto = m->proto;
1737 um.mode = m->mode;
1738 um.reqid = m->reqid;
1739 um.old_family = m->old_family;
1740 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1741 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1742 um.new_family = m->new_family;
1743 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1744 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1745
c0144bea 1746 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 1747}
1748
7deb2264
TG		 1749static inline size_t xfrm_migrate_msgsize(int num_migrate)
1750{
1751 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1752 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1753 + userpolicy_type_attrsize();
1754}
1755
5c79de6e
SS		 1756static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1757 int num_migrate, struct xfrm_selector *sel,
1758 u8 dir, u8 type)
1759{
1760 struct xfrm_migrate *mp;
1761 struct xfrm_userpolicy_id *pol_id;
1762 struct nlmsghdr *nlh;
5c79de6e
SS		 1763 int i;
1764
79b8b7f4
TG		 1765 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1766 if (nlh == NULL)
1767 return -EMSGSIZE;
5c79de6e 1768
7b67c857 1769 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 1770 /* copy data from selector, dir, and type to the pol_id */
1771 memset(pol_id, 0, sizeof(*pol_id));
1772 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1773 pol_id->dir = dir;
1774
1775 if (copy_to_user_policy_type(type, skb) < 0)
1776 goto nlmsg_failure;
1777
1778 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1779 if (copy_to_user_migrate(mp, skb) < 0)
1780 goto nlmsg_failure;
1781 }
1782
9825069d 1783 return nlmsg_end(skb, nlh);
5c79de6e 1784nlmsg_failure:
9825069d
TG		 1785 nlmsg_cancel(skb, nlh);
1786 return -EMSGSIZE;
5c79de6e
SS		 1787}
1788
1789static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1790 struct xfrm_migrate *m, int num_migrate)
1791{
1792 struct sk_buff *skb;
5c79de6e 1793
7deb2264 1794 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC);
5c79de6e
SS		 1795 if (skb == NULL)
1796 return -ENOMEM;
1797
1798 /* build migrate */
1799 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1800 BUG();
1801
082a1ad5 1802 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 1803}
1804#else
1805static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1806 struct xfrm_migrate *m, int num_migrate)
1807{
1808 return -ENOPROTOOPT;
1809}
1810#endif
d51d081d 1811
a7bd9a45 1812#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 1813
1814static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1815 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1816 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1817 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1818 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1819 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1820 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1821 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 1822 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 1823 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b
TG		 1824 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1825 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 1826 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 1827 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 1828 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 1829 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1830 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 1831 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 1832 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 1833 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1834 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 1835};
1836
492b558b
TG		 1837#undef XMSGSIZE
1838
cf5cb79f
TG		 1839static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1840 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1841 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1842 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1843 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1844 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1845 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1846 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1847 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1848 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1849 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1850 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1851 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1852 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1853 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
1854};
1855
1da177e4 1856static struct xfrm_link {
22e70050 1857 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **);
1da177e4 1858 int (*dump)(struct sk_buff *, struct netlink_callback *);
492b558b
TG		 1859} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1860 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1861 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1862 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1863 .dump = xfrm_dump_sa },
1864 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1865 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1866 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1867 .dump = xfrm_dump_policy },
1868 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 1869 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 1870 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 1871 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1872 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 1873 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 1874 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1875 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 1876 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1877 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 1878 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 1879 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 1880 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 1881};
1882
1d00a4eb 1883static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 1884{
35a7aa08 1885 struct nlattr *attrs[XFRMA_MAX+1];
1da177e4 1886 struct xfrm_link *link;
a7bd9a45 1887 int type, err;
1da177e4 1888
1da177e4 1889 type = nlh->nlmsg_type;
1da177e4 1890 if (type > XFRM_MSG_MAX)
1d00a4eb 1891 return -EINVAL;
1da177e4
LT		 1892
1893 type -= XFRM_MSG_BASE;
1894 link = &xfrm_dispatch[type];
1895
1896 /* All operations require privileges, even GET */
1d00a4eb
TG		 1897 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1898 return -EPERM;
1da177e4 1899
492b558b
TG		 1900 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1901 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1902 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 1903 if (link->dump == NULL)
1d00a4eb 1904 return -EINVAL;
88fc2c84 1905
c702e804 1906 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1da177e4
LT		 1907 }
1908
35a7aa08 1909 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 1910 xfrma_policy);
a7bd9a45
TG		 1911 if (err < 0)
1912 return err;
1da177e4
LT		 1913
1914 if (link->doit == NULL)
1d00a4eb 1915 return -EINVAL;
1da177e4 1916
35a7aa08 1917 return link->doit(skb, nlh, (struct rtattr **) attrs);
1da177e4
LT		 1918}
1919
1da177e4
LT		 1920static void xfrm_netlink_rcv(struct sock *sk, int len)
1921{
88fc2c84 1922 unsigned int qlen = 0;
2a0a6ebe 1923
1da177e4 1924 do {
4a3e2f71 1925 mutex_lock(&xfrm_cfg_mutex);
88fc2c84 1926 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
4a3e2f71 1927 mutex_unlock(&xfrm_cfg_mutex);
1da177e4 1928
2a0a6ebe 1929 } while (qlen);
1da177e4
LT		 1930}
1931
7deb2264
TG		 1932static inline size_t xfrm_expire_msgsize(void)
1933{
1934 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
1935}
1936
d51d081d 1937static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 1938{
1939 struct xfrm_user_expire *ue;
1940 struct nlmsghdr *nlh;
1da177e4 1941
79b8b7f4
TG		 1942 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
1943 if (nlh == NULL)
1944 return -EMSGSIZE;
1da177e4 1945
7b67c857 1946 ue = nlmsg_data(nlh);
1da177e4 1947 copy_to_user_state(x, &ue->state);
d51d081d 1948 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 1949
9825069d 1950 return nlmsg_end(skb, nlh);
1da177e4
LT		 1951}
1952
26b15dad 1953static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 1954{
1955 struct sk_buff *skb;
1956
7deb2264 1957 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 1958 if (skb == NULL)
1959 return -ENOMEM;
1960
d51d081d 1961 if (build_expire(skb, x, c) < 0)
1da177e4
LT		 1962 BUG();
1963
082a1ad5 1964 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 1965}
1966
d51d081d
JHS		 1967static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1968{
1969 struct sk_buff *skb;
d51d081d 1970
7deb2264 1971 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 1972 if (skb == NULL)
1973 return -ENOMEM;
1974
1975 if (build_aevent(skb, x, c) < 0)
1976 BUG();
1977
082a1ad5 1978 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 1979}
1980
26b15dad
JHS		 1981static int xfrm_notify_sa_flush(struct km_event *c)
1982{
1983 struct xfrm_usersa_flush *p;
1984 struct nlmsghdr *nlh;
1985 struct sk_buff *skb;
7deb2264 1986 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 1987
7deb2264 1988 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 1989 if (skb == NULL)
1990 return -ENOMEM;
26b15dad 1991
79b8b7f4
TG		 1992 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
1993 if (nlh == NULL) {
1994 kfree_skb(skb);
1995 return -EMSGSIZE;
1996 }
26b15dad 1997
7b67c857 1998 p = nlmsg_data(nlh);
bf08867f 1999 p->proto = c->data.proto;
26b15dad 2000
9825069d 2001 nlmsg_end(skb, nlh);
26b15dad 2002
082a1ad5 2003 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 2004}
2005
7deb2264 2006static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 2007{
7deb2264 2008 size_t l = 0;
26b15dad 2009 if (x->aalg)
7deb2264 2010 l += nla_total_size(alg_len(x->aalg));
26b15dad 2011 if (x->ealg)
7deb2264 2012 l += nla_total_size(alg_len(x->ealg));
26b15dad 2013 if (x->calg)
7deb2264 2014 l += nla_total_size(sizeof(*x->calg));
26b15dad 2015 if (x->encap)
7deb2264 2016 l += nla_total_size(sizeof(*x->encap));
26b15dad
JHS		 2017
2018 return l;
2019}
2020
2021static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2022{
2023 struct xfrm_usersa_info *p;
0603eac0 2024 struct xfrm_usersa_id *id;
26b15dad
JHS		 2025 struct nlmsghdr *nlh;
2026 struct sk_buff *skb;
26b15dad 2027 int len = xfrm_sa_len(x);
0603eac0
HX		 2028 int headlen;
2029
2030 headlen = sizeof(*p);
2031 if (c->event == XFRM_MSG_DELSA) {
7deb2264 2032 len += nla_total_size(headlen);
0603eac0
HX		 2033 headlen = sizeof(*id);
2034 }
7deb2264 2035 len += NLMSG_ALIGN(headlen);
26b15dad 2036
7deb2264 2037 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2038 if (skb == NULL)
2039 return -ENOMEM;
26b15dad 2040
79b8b7f4
TG		 2041 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2042 if (nlh == NULL)
c0144bea 2043 goto nla_put_failure;
26b15dad 2044
7b67c857 2045 p = nlmsg_data(nlh);
0603eac0 2046 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2047 struct nlattr *attr;
2048
7b67c857 2049 id = nlmsg_data(nlh);
0603eac0
HX		 2050 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2051 id->spi = x->id.spi;
2052 id->family = x->props.family;
2053 id->proto = x->id.proto;
2054
c0144bea
TG		 2055 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2056 if (attr == NULL)
2057 goto nla_put_failure;
2058
2059 p = nla_data(attr);
0603eac0
HX		 2060 }
2061
26b15dad
JHS		 2062 copy_to_user_state(x, p);
2063
2064 if (x->aalg)
c26445ac 2065 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
26b15dad 2066 if (x->ealg)
c26445ac 2067 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
26b15dad 2068 if (x->calg)
c0144bea 2069 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
26b15dad
JHS		 2070
2071 if (x->encap)
c0144bea 2072 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
26b15dad 2073
9825069d 2074 nlmsg_end(skb, nlh);
26b15dad 2075
082a1ad5 2076 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2077
c0144bea 2078nla_put_failure:
26b15dad
JHS		 2079 kfree_skb(skb);
2080 return -1;
2081}
2082
2083static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2084{
2085
2086 switch (c->event) {
f60f6b8f 2087 case XFRM_MSG_EXPIRE:
26b15dad 2088 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2089 case XFRM_MSG_NEWAE:
2090 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2091 case XFRM_MSG_DELSA:
2092 case XFRM_MSG_UPDSA:
2093 case XFRM_MSG_NEWSA:
26b15dad 2094 return xfrm_notify_sa(x, c);
f60f6b8f 2095 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2096 return xfrm_notify_sa_flush(c);
2097 default:
2098 printk("xfrm_user: Unknown SA event %d\n", c->event);
2099 break;
2100 }
2101
2102 return 0;
2103
2104}
2105
7deb2264
TG		 2106static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2107 struct xfrm_policy *xp)
2108{
2109 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2110 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2111 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2112 + userpolicy_type_attrsize();
2113}
2114
1da177e4
LT		 2115static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2116 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2117 int dir)
2118{
2119 struct xfrm_user_acquire *ua;
2120 struct nlmsghdr *nlh;
1da177e4
LT		 2121 __u32 seq = xfrm_get_acqseq();
2122
79b8b7f4
TG		 2123 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2124 if (nlh == NULL)
2125 return -EMSGSIZE;
1da177e4 2126
7b67c857 2127 ua = nlmsg_data(nlh);
1da177e4
LT		 2128 memcpy(&ua->id, &x->id, sizeof(ua->id));
2129 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2130 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2131 copy_to_user_policy(xp, &ua->policy, dir);
2132 ua->aalgos = xt->aalgos;
2133 ua->ealgos = xt->ealgos;
2134 ua->calgos = xt->calgos;
2135 ua->seq = x->km.seq = seq;
2136
2137 if (copy_to_user_tmpl(xp, skb) < 0)
2138 goto nlmsg_failure;
0d681623 2139 if (copy_to_user_state_sec_ctx(x, skb))
df71837d 2140 goto nlmsg_failure;
1459bb36 2141 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2142 goto nlmsg_failure;
1da177e4 2143
9825069d 2144 return nlmsg_end(skb, nlh);
1da177e4
LT		 2145
2146nlmsg_failure:
9825069d
TG		 2147 nlmsg_cancel(skb, nlh);
2148 return -EMSGSIZE;
1da177e4
LT		 2149}
2150
2151static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2152 struct xfrm_policy *xp, int dir)
2153{
2154 struct sk_buff *skb;
1da177e4 2155
7deb2264 2156 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2157 if (skb == NULL)
2158 return -ENOMEM;
2159
2160 if (build_acquire(skb, x, xt, xp, dir) < 0)
2161 BUG();
2162
082a1ad5 2163 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2164}
2165
2166/* User gives us xfrm_user_policy_info followed by an array of 0
2167 * or more templates.
2168 */
cb969f07 2169static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2170 u8 *data, int len, int *dir)
2171{
2172 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2173 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2174 struct xfrm_policy *xp;
2175 int nr;
2176
cb969f07 2177 switch (sk->sk_family) {
1da177e4
LT		 2178 case AF_INET:
2179 if (opt != IP_XFRM_POLICY) {
2180 *dir = -EOPNOTSUPP;
2181 return NULL;
2182 }
2183 break;
2184#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2185 case AF_INET6:
2186 if (opt != IPV6_XFRM_POLICY) {
2187 *dir = -EOPNOTSUPP;
2188 return NULL;
2189 }
2190 break;
2191#endif
2192 default:
2193 *dir = -EINVAL;
2194 return NULL;
2195 }
2196
2197 *dir = -EINVAL;
2198
2199 if (len < sizeof(*p) ||
2200 verify_newpolicy_info(p))
2201 return NULL;
2202
2203 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2204 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2205 return NULL;
2206
a4f1bac6
HX		 2207 if (p->dir > XFRM_POLICY_OUT)
2208 return NULL;
2209
1da177e4
LT		 2210 xp = xfrm_policy_alloc(GFP_KERNEL);
2211 if (xp == NULL) {
2212 *dir = -ENOBUFS;
2213 return NULL;
2214 }
2215
2216 copy_from_user_policy(xp, p);
f7b6983f 2217 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2218 copy_templates(xp, ut, nr);
2219
2220 *dir = p->dir;
2221
2222 return xp;
2223}
2224
7deb2264
TG		 2225static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2226{
2227 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2228 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2229 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2230 + userpolicy_type_attrsize();
2231}
2232
1da177e4 2233static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
d51d081d 2234 int dir, struct km_event *c)
1da177e4
LT		 2235{
2236 struct xfrm_user_polexpire *upe;
2237 struct nlmsghdr *nlh;
d51d081d 2238 int hard = c->data.hard;
1da177e4 2239
79b8b7f4
TG		 2240 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2241 if (nlh == NULL)
2242 return -EMSGSIZE;
1da177e4 2243
7b67c857 2244 upe = nlmsg_data(nlh);
1da177e4
LT		 2245 copy_to_user_policy(xp, &upe->pol, dir);
2246 if (copy_to_user_tmpl(xp, skb) < 0)
2247 goto nlmsg_failure;
df71837d
TJ		 2248 if (copy_to_user_sec_ctx(xp, skb))
2249 goto nlmsg_failure;
1459bb36 2250 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2251 goto nlmsg_failure;
1da177e4
LT		 2252 upe->hard = !!hard;
2253
9825069d 2254 return nlmsg_end(skb, nlh);
1da177e4
LT		 2255
2256nlmsg_failure:
9825069d
TG		 2257 nlmsg_cancel(skb, nlh);
2258 return -EMSGSIZE;
1da177e4
LT		 2259}
2260
26b15dad 2261static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4
LT		 2262{
2263 struct sk_buff *skb;
1da177e4 2264
7deb2264 2265 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2266 if (skb == NULL)
2267 return -ENOMEM;
2268
d51d081d 2269 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2270 BUG();
2271
082a1ad5 2272 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2273}
2274
26b15dad
JHS		 2275static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2276{
2277 struct xfrm_userpolicy_info *p;
0603eac0 2278 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2279 struct nlmsghdr *nlh;
2280 struct sk_buff *skb;
7deb2264 2281 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
0603eac0
HX		 2282 int headlen;
2283
2284 headlen = sizeof(*p);
2285 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2286 len += nla_total_size(headlen);
0603eac0
HX		 2287 headlen = sizeof(*id);
2288 }
cfbfd45a 2289 len += userpolicy_type_attrsize();
7deb2264 2290 len += NLMSG_ALIGN(headlen);
26b15dad 2291
7deb2264 2292 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2293 if (skb == NULL)
2294 return -ENOMEM;
26b15dad 2295
79b8b7f4
TG		 2296 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2297 if (nlh == NULL)
2298 goto nlmsg_failure;
26b15dad 2299
7b67c857 2300 p = nlmsg_data(nlh);
0603eac0 2301 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2302 struct nlattr *attr;
2303
7b67c857 2304 id = nlmsg_data(nlh);
0603eac0
HX		 2305 memset(id, 0, sizeof(*id));
2306 id->dir = dir;
2307 if (c->data.byid)
2308 id->index = xp->index;
2309 else
2310 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2311
c0144bea
TG		 2312 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2313 if (attr == NULL)
2314 goto nlmsg_failure;
2315
2316 p = nla_data(attr);
0603eac0 2317 }
26b15dad 2318
26b15dad
JHS		 2319 copy_to_user_policy(xp, p, dir);
2320 if (copy_to_user_tmpl(xp, skb) < 0)
2321 goto nlmsg_failure;
1459bb36 2322 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2323 goto nlmsg_failure;
26b15dad 2324
9825069d 2325 nlmsg_end(skb, nlh);
26b15dad 2326
082a1ad5 2327 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2328
2329nlmsg_failure:
2330 kfree_skb(skb);
2331 return -1;
2332}
2333
2334static int xfrm_notify_policy_flush(struct km_event *c)
2335{
2336 struct nlmsghdr *nlh;
2337 struct sk_buff *skb;
26b15dad 2338
7deb2264 2339 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2340 if (skb == NULL)
2341 return -ENOMEM;
26b15dad 2342
79b8b7f4
TG		 2343 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2344 if (nlh == NULL)
2345 goto nlmsg_failure;
0c51f53c
JHS		 2346 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2347 goto nlmsg_failure;
26b15dad 2348
9825069d 2349 nlmsg_end(skb, nlh);
26b15dad 2350
082a1ad5 2351 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2352
2353nlmsg_failure:
2354 kfree_skb(skb);
2355 return -1;
2356}
2357
2358static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2359{
2360
2361 switch (c->event) {
f60f6b8f
HX		 2362 case XFRM_MSG_NEWPOLICY:
2363 case XFRM_MSG_UPDPOLICY:
2364 case XFRM_MSG_DELPOLICY:
26b15dad 2365 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2366 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2367 return xfrm_notify_policy_flush(c);
f60f6b8f 2368 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2369 return xfrm_exp_policy_notify(xp, dir, c);
2370 default:
2371 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2372 }
2373
2374 return 0;
2375
2376}
2377
7deb2264
TG		 2378static inline size_t xfrm_report_msgsize(void)
2379{
2380 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2381}
2382
97a64b45
MN		 2383static int build_report(struct sk_buff *skb, u8 proto,
2384 struct xfrm_selector *sel, xfrm_address_t *addr)
2385{
2386 struct xfrm_user_report *ur;
2387 struct nlmsghdr *nlh;
97a64b45 2388
79b8b7f4
TG		 2389 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2390 if (nlh == NULL)
2391 return -EMSGSIZE;
97a64b45 2392
7b67c857 2393 ur = nlmsg_data(nlh);
97a64b45
MN		 2394 ur->proto = proto;
2395 memcpy(&ur->sel, sel, sizeof(ur->sel));
2396
2397 if (addr)
c0144bea 2398 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
97a64b45 2399
9825069d 2400 return nlmsg_end(skb, nlh);
97a64b45 2401
c0144bea 2402nla_put_failure:
9825069d
TG		 2403 nlmsg_cancel(skb, nlh);
2404 return -EMSGSIZE;
97a64b45
MN		 2405}
2406
2407static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2408 xfrm_address_t *addr)
2409{
2410 struct sk_buff *skb;
97a64b45 2411
7deb2264 2412 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2413 if (skb == NULL)
2414 return -ENOMEM;
2415
2416 if (build_report(skb, proto, sel, addr) < 0)
2417 BUG();
2418
082a1ad5 2419 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2420}
2421
1da177e4
LT		 2422static struct xfrm_mgr netlink_mgr = {
2423 .id = "netlink",
2424 .notify = xfrm_send_state_notify,
2425 .acquire = xfrm_send_acquire,
2426 .compile_policy = xfrm_compile_policy,
2427 .notify_policy = xfrm_send_policy_notify,
97a64b45 2428 .report = xfrm_send_report,
5c79de6e 2429 .migrate = xfrm_send_migrate,
1da177e4
LT		 2430};
2431
2432static int __init xfrm_user_init(void)
2433{
be33690d
PM		 2434 struct sock *nlsk;
2435
654b32c6 2436 printk(KERN_INFO "Initializing XFRM netlink socket\n");
1da177e4 2437
be33690d 2438 nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
af65bdfc 2439 xfrm_netlink_rcv, NULL, THIS_MODULE);
be33690d 2440 if (nlsk == NULL)
1da177e4 2441 return -ENOMEM;
be33690d 2442 rcu_assign_pointer(xfrm_nl, nlsk);
1da177e4
LT		 2443
2444 xfrm_register_km(&netlink_mgr);
2445
2446 return 0;
2447}
2448
2449static void __exit xfrm_user_exit(void)
2450{
be33690d
PM		 2451 struct sock *nlsk = xfrm_nl;
2452
1da177e4 2453 xfrm_unregister_km(&netlink_mgr);
be33690d
PM		 2454 rcu_assign_pointer(xfrm_nl, NULL);
2455 synchronize_rcu();
2456 sock_release(nlsk->sk_socket);
1da177e4
LT		 2457}
2458
2459module_init(xfrm_user_init);
2460module_exit(xfrm_user_exit);
2461MODULE_LICENSE("GPL");
4fdb3bb7 2462MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 2463
Linux 6.x block layer and io_uring tree(s)