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[NET]: Support multiple network namespaces with netlink
[deliverable/linux.git] / net / xfrm / xfrm_user.c
CommitLineData
1da177e4
LT		 1/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
df71837d 10 *
1da177e4
LT		 11 */
12
9409f38a 13#include <linux/crypto.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
1da177e4
LT		 22#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
88fc2c84 28#include <net/netlink.h>
1da177e4 29#include <asm/uaccess.h>
e23c7194
MN		 30#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
31#include <linux/in6.h>
32#endif
1da177e4 33
c26445ac
TG		 34static inline int alg_len(struct xfrm_algo *alg)
35{
36 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
37}
38
5424f32e 39static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
1da177e4 40{
5424f32e 41 struct nlattr *rt = attrs[type];
1da177e4
LT		 42 struct xfrm_algo *algp;
43
44 if (!rt)
45 return 0;
46
5424f32e
TG		 47 algp = nla_data(rt);
48 if (nla_len(rt) < alg_len(algp))
31c26852
HX		 49 return -EINVAL;
50
1da177e4
LT		 51 switch (type) {
52 case XFRMA_ALG_AUTH:
53 if (!algp->alg_key_len &&
54 strcmp(algp->alg_name, "digest_null") != 0)
55 return -EINVAL;
56 break;
57
58 case XFRMA_ALG_CRYPT:
59 if (!algp->alg_key_len &&
60 strcmp(algp->alg_name, "cipher_null") != 0)
61 return -EINVAL;
62 break;
63
64 case XFRMA_ALG_COMP:
65 /* Zero length keys are legal. */
66 break;
67
68 default:
69 return -EINVAL;
3ff50b79 70 }
1da177e4
LT		 71
72 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
73 return 0;
74}
75
5424f32e 76static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
eb2971b6
MN		 77 xfrm_address_t **addrp)
78{
5424f32e 79 struct nlattr *rt = attrs[type];
eb2971b6 80
cf5cb79f 81 if (rt && addrp)
5424f32e 82 *addrp = nla_data(rt);
eb2971b6 83}
df71837d 84
5424f32e 85static inline int verify_sec_ctx_len(struct nlattr **attrs)
df71837d 86{
5424f32e 87 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d 88 struct xfrm_user_sec_ctx *uctx;
df71837d
TJ		 89
90 if (!rt)
91 return 0;
92
5424f32e 93 uctx = nla_data(rt);
cf5cb79f 94 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
df71837d
TJ		 95 return -EINVAL;
96
97 return 0;
98}
99
100
1da177e4 101static int verify_newsa_info(struct xfrm_usersa_info *p,
5424f32e 102 struct nlattr **attrs)
1da177e4
LT		 103{
104 int err;
105
106 err = -EINVAL;
107 switch (p->family) {
108 case AF_INET:
109 break;
110
111 case AF_INET6:
112#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
113 break;
114#else
115 err = -EAFNOSUPPORT;
116 goto out;
117#endif
118
119 default:
120 goto out;
3ff50b79 121 }
1da177e4
LT		 122
123 err = -EINVAL;
124 switch (p->id.proto) {
125 case IPPROTO_AH:
35a7aa08
TG		 126 if (!attrs[XFRMA_ALG_AUTH] ||
127 attrs[XFRMA_ALG_CRYPT] ||
128 attrs[XFRMA_ALG_COMP])
1da177e4
LT		 129 goto out;
130 break;
131
132 case IPPROTO_ESP:
35a7aa08
TG		 133 if ((!attrs[XFRMA_ALG_AUTH] &&
134 !attrs[XFRMA_ALG_CRYPT]) ||
135 attrs[XFRMA_ALG_COMP])
1da177e4
LT		 136 goto out;
137 break;
138
139 case IPPROTO_COMP:
35a7aa08
TG		 140 if (!attrs[XFRMA_ALG_COMP] ||
141 attrs[XFRMA_ALG_AUTH] ||
142 attrs[XFRMA_ALG_CRYPT])
1da177e4
LT		 143 goto out;
144 break;
145
e23c7194
MN		 146#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
147 case IPPROTO_DSTOPTS:
148 case IPPROTO_ROUTING:
35a7aa08
TG		 149 if (attrs[XFRMA_ALG_COMP] ||
150 attrs[XFRMA_ALG_AUTH] ||
151 attrs[XFRMA_ALG_CRYPT] ||
152 attrs[XFRMA_ENCAP] ||
153 attrs[XFRMA_SEC_CTX] ||
154 !attrs[XFRMA_COADDR])
e23c7194
MN		 155 goto out;
156 break;
157#endif
158
1da177e4
LT		 159 default:
160 goto out;
3ff50b79 161 }
1da177e4 162
35a7aa08 163 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
1da177e4 164 goto out;
35a7aa08 165 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
1da177e4 166 goto out;
35a7aa08 167 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
1da177e4 168 goto out;
35a7aa08 169 if ((err = verify_sec_ctx_len(attrs)))
df71837d 170 goto out;
1da177e4
LT		 171
172 err = -EINVAL;
173 switch (p->mode) {
7e49e6de
MN		 174 case XFRM_MODE_TRANSPORT:
175 case XFRM_MODE_TUNNEL:
060f02a3 176 case XFRM_MODE_ROUTEOPTIMIZATION:
0a69452c 177 case XFRM_MODE_BEET:
1da177e4
LT		 178 break;
179
180 default:
181 goto out;
3ff50b79 182 }
1da177e4
LT		 183
184 err = 0;
185
186out:
187 return err;
188}
189
190static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
191 struct xfrm_algo_desc *(*get_byname)(char *, int),
5424f32e 192 struct nlattr *rta)
1da177e4 193{
1da177e4
LT		 194 struct xfrm_algo *p, *ualg;
195 struct xfrm_algo_desc *algo;
196
197 if (!rta)
198 return 0;
199
5424f32e 200 ualg = nla_data(rta);
1da177e4
LT		 201
202 algo = get_byname(ualg->alg_name, 1);
203 if (!algo)
204 return -ENOSYS;
205 *props = algo->desc.sadb_alg_id;
206
c26445ac 207 p = kmemdup(ualg, alg_len(ualg), GFP_KERNEL);
1da177e4
LT		 208 if (!p)
209 return -ENOMEM;
210
04ff1260 211 strcpy(p->alg_name, algo->name);
1da177e4
LT		 212 *algpp = p;
213 return 0;
214}
215
661697f7 216static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
df71837d 217{
df71837d
TJ		 218 int len = 0;
219
220 if (xfrm_ctx) {
221 len += sizeof(struct xfrm_user_sec_ctx);
222 len += xfrm_ctx->ctx_len;
223 }
224 return len;
225}
226
1da177e4
LT		 227static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
228{
229 memcpy(&x->id, &p->id, sizeof(x->id));
230 memcpy(&x->sel, &p->sel, sizeof(x->sel));
231 memcpy(&x->lft, &p->lft, sizeof(x->lft));
232 x->props.mode = p->mode;
233 x->props.replay_window = p->replay_window;
234 x->props.reqid = p->reqid;
235 x->props.family = p->family;
54489c14 236 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
1da177e4 237 x->props.flags = p->flags;
196b0036
HX		 238
239 /*
240 * Set inner address family if the KM left it as zero.
241 * See comment in validate_tmpl.
242 */
243 if (!x->sel.family)
244 x->sel.family = p->family;
1da177e4
LT		 245}
246
d51d081d
JHS		 247/*
248 * someday when pfkey also has support, we could have the code
249 * somehow made shareable and move it to xfrm_state.c - JHS
250 *
251*/
5424f32e 252static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
d51d081d 253{
5424f32e
TG		 254 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
255 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
256 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
257 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
d51d081d
JHS		 258
259 if (rp) {
260 struct xfrm_replay_state *replay;
5424f32e 261 replay = nla_data(rp);
d51d081d
JHS		 262 memcpy(&x->replay, replay, sizeof(*replay));
263 memcpy(&x->preplay, replay, sizeof(*replay));
264 }
265
266 if (lt) {
267 struct xfrm_lifetime_cur *ltime;
5424f32e 268 ltime = nla_data(lt);
d51d081d
JHS		 269 x->curlft.bytes = ltime->bytes;
270 x->curlft.packets = ltime->packets;
271 x->curlft.add_time = ltime->add_time;
272 x->curlft.use_time = ltime->use_time;
273 }
274
cf5cb79f 275 if (et)
5424f32e 276 x->replay_maxage = nla_get_u32(et);
d51d081d 277
cf5cb79f 278 if (rt)
5424f32e 279 x->replay_maxdiff = nla_get_u32(rt);
d51d081d
JHS		 280}
281
1da177e4 282static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p,
5424f32e 283 struct nlattr **attrs,
1da177e4
LT		 284 int *errp)
285{
286 struct xfrm_state *x = xfrm_state_alloc();
287 int err = -ENOMEM;
288
289 if (!x)
290 goto error_no_put;
291
292 copy_from_user_state(x, p);
293
294 if ((err = attach_one_algo(&x->aalg, &x->props.aalgo,
295 xfrm_aalg_get_byname,
35a7aa08 296 attrs[XFRMA_ALG_AUTH])))
1da177e4
LT		 297 goto error;
298 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
299 xfrm_ealg_get_byname,
35a7aa08 300 attrs[XFRMA_ALG_CRYPT])))
1da177e4
LT		 301 goto error;
302 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
303 xfrm_calg_get_byname,
35a7aa08 304 attrs[XFRMA_ALG_COMP])))
1da177e4 305 goto error;
fd21150a
TG		 306
307 if (attrs[XFRMA_ENCAP]) {
308 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
309 sizeof(*x->encap), GFP_KERNEL);
310 if (x->encap == NULL)
311 goto error;
312 }
313
314 if (attrs[XFRMA_COADDR]) {
315 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
316 sizeof(*x->coaddr), GFP_KERNEL);
317 if (x->coaddr == NULL)
318 goto error;
319 }
320
72cb6962 321 err = xfrm_init_state(x);
1da177e4
LT		 322 if (err)
323 goto error;
324
fd21150a
TG		 325 if (attrs[XFRMA_SEC_CTX] &&
326 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
df71837d
TJ		 327 goto error;
328
1da177e4 329 x->km.seq = p->seq;
d51d081d
JHS		 330 x->replay_maxdiff = sysctl_xfrm_aevent_rseqth;
331 /* sysctl_xfrm_aevent_etime is in 100ms units */
332 x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M;
333 x->preplay.bitmap = 0;
334 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
335 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
336
337 /* override default values from above */
338
5424f32e 339 xfrm_update_ae_params(x, attrs);
1da177e4
LT		 340
341 return x;
342
343error:
344 x->km.state = XFRM_STATE_DEAD;
345 xfrm_state_put(x);
346error_no_put:
347 *errp = err;
348 return NULL;
349}
350
22e70050 351static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 352 struct nlattr **attrs)
1da177e4 353{
7b67c857 354 struct xfrm_usersa_info *p = nlmsg_data(nlh);
1da177e4
LT		 355 struct xfrm_state *x;
356 int err;
26b15dad 357 struct km_event c;
1da177e4 358
35a7aa08 359 err = verify_newsa_info(p, attrs);
1da177e4
LT		 360 if (err)
361 return err;
362
35a7aa08 363 x = xfrm_state_construct(p, attrs, &err);
1da177e4
LT		 364 if (!x)
365 return err;
366
26b15dad 367 xfrm_state_hold(x);
1da177e4
LT		 368 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
369 err = xfrm_state_add(x);
370 else
371 err = xfrm_state_update(x);
372
ab5f5e8b
JL		 373 xfrm_audit_state_add(x, err ? 0 : 1, NETLINK_CB(skb).loginuid,
374 NETLINK_CB(skb).sid);
161a09e7 375
1da177e4
LT		 376 if (err < 0) {
377 x->km.state = XFRM_STATE_DEAD;
21380b81 378 __xfrm_state_put(x);
7d6dfe1f 379 goto out;
1da177e4
LT		 380 }
381
26b15dad
JHS		 382 c.seq = nlh->nlmsg_seq;
383 c.pid = nlh->nlmsg_pid;
f60f6b8f 384 c.event = nlh->nlmsg_type;
26b15dad
JHS		 385
386 km_state_notify(x, &c);
7d6dfe1f 387out:
26b15dad 388 xfrm_state_put(x);
1da177e4
LT		 389 return err;
390}
391
eb2971b6 392static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p,
5424f32e 393 struct nlattr **attrs,
eb2971b6
MN		 394 int *errp)
395{
396 struct xfrm_state *x = NULL;
397 int err;
398
399 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
400 err = -ESRCH;
401 x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family);
402 } else {
403 xfrm_address_t *saddr = NULL;
404
35a7aa08 405 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
eb2971b6
MN		 406 if (!saddr) {
407 err = -EINVAL;
408 goto out;
409 }
410
9abbffee 411 err = -ESRCH;
eb2971b6
MN		 412 x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto,
413 p->family);
414 }
415
416 out:
417 if (!x && errp)
418 *errp = err;
419 return x;
420}
421
22e70050 422static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 423 struct nlattr **attrs)
1da177e4
LT		 424{
425 struct xfrm_state *x;
eb2971b6 426 int err = -ESRCH;
26b15dad 427 struct km_event c;
7b67c857 428 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4 429
35a7aa08 430 x = xfrm_user_state_lookup(p, attrs, &err);
1da177e4 431 if (x == NULL)
eb2971b6 432 return err;
1da177e4 433
6f68dc37 434 if ((err = security_xfrm_state_delete(x)) != 0)
c8c05a8e
CZ		 435 goto out;
436
1da177e4 437 if (xfrm_state_kern(x)) {
c8c05a8e
CZ		 438 err = -EPERM;
439 goto out;
1da177e4
LT		 440 }
441
26b15dad 442 err = xfrm_state_delete(x);
161a09e7 443
c8c05a8e
CZ		 444 if (err < 0)
445 goto out;
26b15dad
JHS		 446
447 c.seq = nlh->nlmsg_seq;
448 c.pid = nlh->nlmsg_pid;
f60f6b8f 449 c.event = nlh->nlmsg_type;
26b15dad 450 km_state_notify(x, &c);
1da177e4 451
c8c05a8e 452out:
ab5f5e8b
JL		 453 xfrm_audit_state_delete(x, err ? 0 : 1, NETLINK_CB(skb).loginuid,
454 NETLINK_CB(skb).sid);
c8c05a8e 455 xfrm_state_put(x);
26b15dad 456 return err;
1da177e4
LT		 457}
458
459static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
460{
461 memcpy(&p->id, &x->id, sizeof(p->id));
462 memcpy(&p->sel, &x->sel, sizeof(p->sel));
463 memcpy(&p->lft, &x->lft, sizeof(p->lft));
464 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
465 memcpy(&p->stats, &x->stats, sizeof(p->stats));
54489c14 466 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
1da177e4
LT		 467 p->mode = x->props.mode;
468 p->replay_window = x->props.replay_window;
469 p->reqid = x->props.reqid;
470 p->family = x->props.family;
471 p->flags = x->props.flags;
472 p->seq = x->km.seq;
473}
474
475struct xfrm_dump_info {
476 struct sk_buff *in_skb;
477 struct sk_buff *out_skb;
478 u32 nlmsg_seq;
479 u16 nlmsg_flags;
480 int start_idx;
481 int this_idx;
482};
483
c0144bea
TG		 484static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
485{
486 int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len;
487 struct xfrm_user_sec_ctx *uctx;
488 struct nlattr *attr;
489
490 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
491 if (attr == NULL)
492 return -EMSGSIZE;
493
494 uctx = nla_data(attr);
495 uctx->exttype = XFRMA_SEC_CTX;
496 uctx->len = ctx_size;
497 uctx->ctx_doi = s->ctx_doi;
498 uctx->ctx_alg = s->ctx_alg;
499 uctx->ctx_len = s->ctx_len;
500 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
501
502 return 0;
503}
504
1da177e4
LT		 505static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
506{
507 struct xfrm_dump_info *sp = ptr;
508 struct sk_buff *in_skb = sp->in_skb;
509 struct sk_buff *skb = sp->out_skb;
510 struct xfrm_usersa_info *p;
511 struct nlmsghdr *nlh;
1da177e4
LT		 512
513 if (sp->this_idx < sp->start_idx)
514 goto out;
515
79b8b7f4
TG		 516 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
517 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
518 if (nlh == NULL)
519 return -EMSGSIZE;
1da177e4 520
7b67c857 521 p = nlmsg_data(nlh);
1da177e4
LT		 522 copy_to_user_state(x, p);
523
524 if (x->aalg)
c26445ac 525 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
1da177e4 526 if (x->ealg)
c26445ac 527 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
1da177e4 528 if (x->calg)
c0144bea 529 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
1da177e4
LT		 530
531 if (x->encap)
c0144bea 532 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
1da177e4 533
c0144bea
TG		 534 if (x->security && copy_sec_ctx(x->security, skb) < 0)
535 goto nla_put_failure;
060f02a3
NT		 536
537 if (x->coaddr)
c0144bea 538 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
060f02a3 539
9afaca05 540 if (x->lastused)
c0144bea 541 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
9afaca05 542
9825069d 543 nlmsg_end(skb, nlh);
1da177e4
LT		 544out:
545 sp->this_idx++;
546 return 0;
547
c0144bea 548nla_put_failure:
9825069d
TG		 549 nlmsg_cancel(skb, nlh);
550 return -EMSGSIZE;
1da177e4
LT		 551}
552
553static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
554{
555 struct xfrm_dump_info info;
556
557 info.in_skb = cb->skb;
558 info.out_skb = skb;
559 info.nlmsg_seq = cb->nlh->nlmsg_seq;
560 info.nlmsg_flags = NLM_F_MULTI;
561 info.this_idx = 0;
562 info.start_idx = cb->args[0];
dc00a525 563 (void) xfrm_state_walk(0, dump_one_state, &info);
1da177e4
LT		 564 cb->args[0] = info.this_idx;
565
566 return skb->len;
567}
568
569static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
570 struct xfrm_state *x, u32 seq)
571{
572 struct xfrm_dump_info info;
573 struct sk_buff *skb;
574
7deb2264 575 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1da177e4
LT		 576 if (!skb)
577 return ERR_PTR(-ENOMEM);
578
1da177e4
LT		 579 info.in_skb = in_skb;
580 info.out_skb = skb;
581 info.nlmsg_seq = seq;
582 info.nlmsg_flags = 0;
583 info.this_idx = info.start_idx = 0;
584
585 if (dump_one_state(x, 0, &info)) {
586 kfree_skb(skb);
587 return NULL;
588 }
589
590 return skb;
591}
592
7deb2264
TG		 593static inline size_t xfrm_spdinfo_msgsize(void)
594{
595 return NLMSG_ALIGN(4)
596 + nla_total_size(sizeof(struct xfrmu_spdinfo))
597 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
598}
599
ecfd6b18
JHS		 600static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
601{
5a6d3416
JHS		 602 struct xfrmk_spdinfo si;
603 struct xfrmu_spdinfo spc;
604 struct xfrmu_spdhinfo sph;
ecfd6b18
JHS		 605 struct nlmsghdr *nlh;
606 u32 *f;
607
608 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
609 if (nlh == NULL) /* shouldnt really happen ... */
610 return -EMSGSIZE;
611
612 f = nlmsg_data(nlh);
613 *f = flags;
614 xfrm_spd_getinfo(&si);
5a6d3416
JHS		 615 spc.incnt = si.incnt;
616 spc.outcnt = si.outcnt;
617 spc.fwdcnt = si.fwdcnt;
618 spc.inscnt = si.inscnt;
619 spc.outscnt = si.outscnt;
620 spc.fwdscnt = si.fwdscnt;
621 sph.spdhcnt = si.spdhcnt;
622 sph.spdhmcnt = si.spdhmcnt;
623
624 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
625 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
ecfd6b18
JHS		 626
627 return nlmsg_end(skb, nlh);
628
629nla_put_failure:
630 nlmsg_cancel(skb, nlh);
631 return -EMSGSIZE;
632}
633
634static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 635 struct nlattr **attrs)
ecfd6b18
JHS		 636{
637 struct sk_buff *r_skb;
7b67c857 638 u32 *flags = nlmsg_data(nlh);
ecfd6b18
JHS		 639 u32 spid = NETLINK_CB(skb).pid;
640 u32 seq = nlh->nlmsg_seq;
ecfd6b18 641
7deb2264 642 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
ecfd6b18
JHS		 643 if (r_skb == NULL)
644 return -ENOMEM;
645
646 if (build_spdinfo(r_skb, spid, seq, *flags) < 0)
647 BUG();
648
649 return nlmsg_unicast(xfrm_nl, r_skb, spid);
650}
651
7deb2264
TG		 652static inline size_t xfrm_sadinfo_msgsize(void)
653{
654 return NLMSG_ALIGN(4)
655 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
656 + nla_total_size(4); /* XFRMA_SAD_CNT */
657}
658
28d8909b
JHS		 659static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags)
660{
af11e316
JHS		 661 struct xfrmk_sadinfo si;
662 struct xfrmu_sadhinfo sh;
28d8909b
JHS		 663 struct nlmsghdr *nlh;
664 u32 *f;
665
666 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
667 if (nlh == NULL) /* shouldnt really happen ... */
668 return -EMSGSIZE;
669
670 f = nlmsg_data(nlh);
671 *f = flags;
672 xfrm_sad_getinfo(&si);
673
af11e316
JHS		 674 sh.sadhmcnt = si.sadhmcnt;
675 sh.sadhcnt = si.sadhcnt;
676
677 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
678 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
28d8909b
JHS		 679
680 return nlmsg_end(skb, nlh);
681
682nla_put_failure:
683 nlmsg_cancel(skb, nlh);
684 return -EMSGSIZE;
685}
686
687static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 688 struct nlattr **attrs)
28d8909b
JHS		 689{
690 struct sk_buff *r_skb;
7b67c857 691 u32 *flags = nlmsg_data(nlh);
28d8909b
JHS		 692 u32 spid = NETLINK_CB(skb).pid;
693 u32 seq = nlh->nlmsg_seq;
28d8909b 694
7deb2264 695 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
28d8909b
JHS		 696 if (r_skb == NULL)
697 return -ENOMEM;
698
699 if (build_sadinfo(r_skb, spid, seq, *flags) < 0)
700 BUG();
701
702 return nlmsg_unicast(xfrm_nl, r_skb, spid);
703}
704
22e70050 705static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 706 struct nlattr **attrs)
1da177e4 707{
7b67c857 708 struct xfrm_usersa_id *p = nlmsg_data(nlh);
1da177e4
LT		 709 struct xfrm_state *x;
710 struct sk_buff *resp_skb;
eb2971b6 711 int err = -ESRCH;
1da177e4 712
35a7aa08 713 x = xfrm_user_state_lookup(p, attrs, &err);
1da177e4
LT		 714 if (x == NULL)
715 goto out_noput;
716
717 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
718 if (IS_ERR(resp_skb)) {
719 err = PTR_ERR(resp_skb);
720 } else {
082a1ad5 721 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 722 }
723 xfrm_state_put(x);
724out_noput:
725 return err;
726}
727
728static int verify_userspi_info(struct xfrm_userspi_info *p)
729{
730 switch (p->info.id.proto) {
731 case IPPROTO_AH:
732 case IPPROTO_ESP:
733 break;
734
735 case IPPROTO_COMP:
736 /* IPCOMP spi is 16-bits. */
737 if (p->max >= 0x10000)
738 return -EINVAL;
739 break;
740
741 default:
742 return -EINVAL;
3ff50b79 743 }
1da177e4
LT		 744
745 if (p->min > p->max)
746 return -EINVAL;
747
748 return 0;
749}
750
22e70050 751static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 752 struct nlattr **attrs)
1da177e4
LT		 753{
754 struct xfrm_state *x;
755 struct xfrm_userspi_info *p;
756 struct sk_buff *resp_skb;
757 xfrm_address_t *daddr;
758 int family;
759 int err;
760
7b67c857 761 p = nlmsg_data(nlh);
1da177e4
LT		 762 err = verify_userspi_info(p);
763 if (err)
764 goto out_noput;
765
766 family = p->info.family;
767 daddr = &p->info.id.daddr;
768
769 x = NULL;
770 if (p->info.seq) {
771 x = xfrm_find_acq_byseq(p->info.seq);
772 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
773 xfrm_state_put(x);
774 x = NULL;
775 }
776 }
777
778 if (!x)
779 x = xfrm_find_acq(p->info.mode, p->info.reqid,
780 p->info.id.proto, daddr,
781 &p->info.saddr, 1,
782 family);
783 err = -ENOENT;
784 if (x == NULL)
785 goto out_noput;
786
787 resp_skb = ERR_PTR(-ENOENT);
788
789 spin_lock_bh(&x->lock);
790 if (x->km.state != XFRM_STATE_DEAD) {
791 xfrm_alloc_spi(x, htonl(p->min), htonl(p->max));
792 if (x->id.spi)
793 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
794 }
795 spin_unlock_bh(&x->lock);
796
797 if (IS_ERR(resp_skb)) {
798 err = PTR_ERR(resp_skb);
799 goto out;
800 }
801
082a1ad5 802 err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid);
1da177e4
LT		 803
804out:
805 xfrm_state_put(x);
806out_noput:
807 return err;
808}
809
b798a9ed 810static int verify_policy_dir(u8 dir)
1da177e4
LT		 811{
812 switch (dir) {
813 case XFRM_POLICY_IN:
814 case XFRM_POLICY_OUT:
815 case XFRM_POLICY_FWD:
816 break;
817
818 default:
819 return -EINVAL;
3ff50b79 820 }
1da177e4
LT		 821
822 return 0;
823}
824
b798a9ed 825static int verify_policy_type(u8 type)
f7b6983f
MN		 826{
827 switch (type) {
828 case XFRM_POLICY_TYPE_MAIN:
829#ifdef CONFIG_XFRM_SUB_POLICY
830 case XFRM_POLICY_TYPE_SUB:
831#endif
832 break;
833
834 default:
835 return -EINVAL;
3ff50b79 836 }
f7b6983f
MN		 837
838 return 0;
839}
840
1da177e4
LT		 841static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
842{
843 switch (p->share) {
844 case XFRM_SHARE_ANY:
845 case XFRM_SHARE_SESSION:
846 case XFRM_SHARE_USER:
847 case XFRM_SHARE_UNIQUE:
848 break;
849
850 default:
851 return -EINVAL;
3ff50b79 852 }
1da177e4
LT		 853
854 switch (p->action) {
855 case XFRM_POLICY_ALLOW:
856 case XFRM_POLICY_BLOCK:
857 break;
858
859 default:
860 return -EINVAL;
3ff50b79 861 }
1da177e4
LT		 862
863 switch (p->sel.family) {
864 case AF_INET:
865 break;
866
867 case AF_INET6:
868#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
869 break;
870#else
871 return -EAFNOSUPPORT;
872#endif
873
874 default:
875 return -EINVAL;
3ff50b79 876 }
1da177e4
LT		 877
878 return verify_policy_dir(p->dir);
879}
880
5424f32e 881static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
df71837d 882{
5424f32e 883 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 884 struct xfrm_user_sec_ctx *uctx;
885
886 if (!rt)
887 return 0;
888
5424f32e 889 uctx = nla_data(rt);
df71837d
TJ		 890 return security_xfrm_policy_alloc(pol, uctx);
891}
892
1da177e4
LT		 893static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
894 int nr)
895{
896 int i;
897
898 xp->xfrm_nr = nr;
899 for (i = 0; i < nr; i++, ut++) {
900 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
901
902 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
903 memcpy(&t->saddr, &ut->saddr,
904 sizeof(xfrm_address_t));
905 t->reqid = ut->reqid;
906 t->mode = ut->mode;
907 t->share = ut->share;
908 t->optional = ut->optional;
909 t->aalgos = ut->aalgos;
910 t->ealgos = ut->ealgos;
911 t->calgos = ut->calgos;
8511d01d 912 t->encap_family = ut->family;
1da177e4
LT		 913 }
914}
915
b4ad86bf
DM		 916static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
917{
918 int i;
919
920 if (nr > XFRM_MAX_DEPTH)
921 return -EINVAL;
922
923 for (i = 0; i < nr; i++) {
924 /* We never validated the ut->family value, so many
925 * applications simply leave it at zero. The check was
926 * never made and ut->family was ignored because all
927 * templates could be assumed to have the same family as
928 * the policy itself. Now that we will have ipv4-in-ipv6
929 * and ipv6-in-ipv4 tunnels, this is no longer true.
930 */
931 if (!ut[i].family)
932 ut[i].family = family;
933
934 switch (ut[i].family) {
935 case AF_INET:
936 break;
937#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
938 case AF_INET6:
939 break;
940#endif
941 default:
942 return -EINVAL;
3ff50b79 943 }
b4ad86bf
DM		 944 }
945
946 return 0;
947}
948
5424f32e 949static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
1da177e4 950{
5424f32e 951 struct nlattr *rt = attrs[XFRMA_TMPL];
1da177e4
LT		 952
953 if (!rt) {
954 pol->xfrm_nr = 0;
955 } else {
5424f32e
TG		 956 struct xfrm_user_tmpl *utmpl = nla_data(rt);
957 int nr = nla_len(rt) / sizeof(*utmpl);
b4ad86bf 958 int err;
1da177e4 959
b4ad86bf
DM		 960 err = validate_tmpl(nr, utmpl, pol->family);
961 if (err)
962 return err;
1da177e4 963
5424f32e 964 copy_templates(pol, utmpl, nr);
1da177e4
LT		 965 }
966 return 0;
967}
968
5424f32e 969static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
f7b6983f 970{
5424f32e 971 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
f7b6983f 972 struct xfrm_userpolicy_type *upt;
b798a9ed 973 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f
MN		 974 int err;
975
976 if (rt) {
5424f32e 977 upt = nla_data(rt);
f7b6983f
MN		 978 type = upt->type;
979 }
980
981 err = verify_policy_type(type);
982 if (err)
983 return err;
984
985 *tp = type;
986 return 0;
987}
988
1da177e4
LT		 989static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
990{
991 xp->priority = p->priority;
992 xp->index = p->index;
993 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
994 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
995 xp->action = p->action;
996 xp->flags = p->flags;
997 xp->family = p->sel.family;
998 /* XXX xp->share = p->share; */
999}
1000
1001static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1002{
1003 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1004 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1005 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1006 p->priority = xp->priority;
1007 p->index = xp->index;
1008 p->sel.family = xp->family;
1009 p->dir = dir;
1010 p->action = xp->action;
1011 p->flags = xp->flags;
1012 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1013}
1014
5424f32e 1015static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
1da177e4
LT		 1016{
1017 struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL);
1018 int err;
1019
1020 if (!xp) {
1021 *errp = -ENOMEM;
1022 return NULL;
1023 }
1024
1025 copy_from_user_policy(xp, p);
df71837d 1026
35a7aa08 1027 err = copy_from_user_policy_type(&xp->type, attrs);
f7b6983f
MN		 1028 if (err)
1029 goto error;
1030
35a7aa08
TG		 1031 if (!(err = copy_from_user_tmpl(xp, attrs)))
1032 err = copy_from_user_sec_ctx(xp, attrs);
f7b6983f
MN		 1033 if (err)
1034 goto error;
1da177e4
LT		 1035
1036 return xp;
f7b6983f
MN		 1037 error:
1038 *errp = err;
1039 kfree(xp);
1040 return NULL;
1da177e4
LT		 1041}
1042
22e70050 1043static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1044 struct nlattr **attrs)
1da177e4 1045{
7b67c857 1046 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
1da177e4 1047 struct xfrm_policy *xp;
26b15dad 1048 struct km_event c;
1da177e4
LT		 1049 int err;
1050 int excl;
1051
1052 err = verify_newpolicy_info(p);
df71837d
TJ		 1053 if (err)
1054 return err;
35a7aa08 1055 err = verify_sec_ctx_len(attrs);
1da177e4
LT		 1056 if (err)
1057 return err;
1058
35a7aa08 1059 xp = xfrm_policy_construct(p, attrs, &err);
1da177e4
LT		 1060 if (!xp)
1061 return err;
1062
26b15dad
JHS		 1063 /* shouldnt excl be based on nlh flags??
1064 * Aha! this is anti-netlink really i.e more pfkey derived
1065 * in netlink excl is a flag and you wouldnt need
1066 * a type XFRM_MSG_UPDPOLICY - JHS */
1da177e4
LT		 1067 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1068 err = xfrm_policy_insert(p->dir, xp, excl);
ab5f5e8b
JL		 1069 xfrm_audit_policy_add(xp, err ? 0 : 1, NETLINK_CB(skb).loginuid,
1070 NETLINK_CB(skb).sid);
161a09e7 1071
1da177e4 1072 if (err) {
5f8ac64b 1073 security_xfrm_policy_free(xp);
1da177e4
LT		 1074 kfree(xp);
1075 return err;
1076 }
1077
f60f6b8f 1078 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1079 c.seq = nlh->nlmsg_seq;
1080 c.pid = nlh->nlmsg_pid;
1081 km_policy_notify(xp, p->dir, &c);
1082
1da177e4
LT		 1083 xfrm_pol_put(xp);
1084
1085 return 0;
1086}
1087
1088static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1089{
1090 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1091 int i;
1092
1093 if (xp->xfrm_nr == 0)
1094 return 0;
1095
1096 for (i = 0; i < xp->xfrm_nr; i++) {
1097 struct xfrm_user_tmpl *up = &vec[i];
1098 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1099
1100 memcpy(&up->id, &kp->id, sizeof(up->id));
8511d01d 1101 up->family = kp->encap_family;
1da177e4
LT		 1102 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1103 up->reqid = kp->reqid;
1104 up->mode = kp->mode;
1105 up->share = kp->share;
1106 up->optional = kp->optional;
1107 up->aalgos = kp->aalgos;
1108 up->ealgos = kp->ealgos;
1109 up->calgos = kp->calgos;
1110 }
df71837d 1111
c0144bea
TG		 1112 return nla_put(skb, XFRMA_TMPL,
1113 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
0d681623
SH		 1114}
1115
1116static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1117{
1118 if (x->security) {
1119 return copy_sec_ctx(x->security, skb);
df71837d
TJ		 1120 }
1121 return 0;
0d681623 1122}
df71837d 1123
0d681623
SH		 1124static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1125{
1126 if (xp->security) {
1127 return copy_sec_ctx(xp->security, skb);
1128 }
1129 return 0;
df71837d 1130}
cfbfd45a
TG		 1131static inline size_t userpolicy_type_attrsize(void)
1132{
1133#ifdef CONFIG_XFRM_SUB_POLICY
1134 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1135#else
1136 return 0;
1137#endif
1138}
df71837d 1139
f7b6983f 1140#ifdef CONFIG_XFRM_SUB_POLICY
b798a9ed 1141static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f 1142{
c0144bea
TG		 1143 struct xfrm_userpolicy_type upt = {
1144 .type = type,
1145 };
f7b6983f 1146
c0144bea 1147 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
f7b6983f
MN		 1148}
1149
1150#else
b798a9ed 1151static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
f7b6983f
MN		 1152{
1153 return 0;
1154}
1155#endif
1156
1da177e4
LT		 1157static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1158{
1159 struct xfrm_dump_info *sp = ptr;
1160 struct xfrm_userpolicy_info *p;
1161 struct sk_buff *in_skb = sp->in_skb;
1162 struct sk_buff *skb = sp->out_skb;
1163 struct nlmsghdr *nlh;
1da177e4
LT		 1164
1165 if (sp->this_idx < sp->start_idx)
1166 goto out;
1167
79b8b7f4
TG		 1168 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1169 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1170 if (nlh == NULL)
1171 return -EMSGSIZE;
1da177e4 1172
7b67c857 1173 p = nlmsg_data(nlh);
1da177e4
LT		 1174 copy_to_user_policy(xp, p, dir);
1175 if (copy_to_user_tmpl(xp, skb) < 0)
1176 goto nlmsg_failure;
df71837d
TJ		 1177 if (copy_to_user_sec_ctx(xp, skb))
1178 goto nlmsg_failure;
1459bb36 1179 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 1180 goto nlmsg_failure;
1da177e4 1181
9825069d 1182 nlmsg_end(skb, nlh);
1da177e4
LT		 1183out:
1184 sp->this_idx++;
1185 return 0;
1186
1187nlmsg_failure:
9825069d
TG		 1188 nlmsg_cancel(skb, nlh);
1189 return -EMSGSIZE;
1da177e4
LT		 1190}
1191
1192static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1193{
1194 struct xfrm_dump_info info;
1195
1196 info.in_skb = cb->skb;
1197 info.out_skb = skb;
1198 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1199 info.nlmsg_flags = NLM_F_MULTI;
1200 info.this_idx = 0;
1201 info.start_idx = cb->args[0];
f7b6983f
MN		 1202 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info);
1203#ifdef CONFIG_XFRM_SUB_POLICY
1204 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info);
1205#endif
1da177e4
LT		 1206 cb->args[0] = info.this_idx;
1207
1208 return skb->len;
1209}
1210
1211static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1212 struct xfrm_policy *xp,
1213 int dir, u32 seq)
1214{
1215 struct xfrm_dump_info info;
1216 struct sk_buff *skb;
1217
7deb2264 1218 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1da177e4
LT		 1219 if (!skb)
1220 return ERR_PTR(-ENOMEM);
1221
1da177e4
LT		 1222 info.in_skb = in_skb;
1223 info.out_skb = skb;
1224 info.nlmsg_seq = seq;
1225 info.nlmsg_flags = 0;
1226 info.this_idx = info.start_idx = 0;
1227
1228 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1229 kfree_skb(skb);
1230 return NULL;
1231 }
1232
1233 return skb;
1234}
1235
22e70050 1236static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1237 struct nlattr **attrs)
1da177e4
LT		 1238{
1239 struct xfrm_policy *xp;
1240 struct xfrm_userpolicy_id *p;
b798a9ed 1241 u8 type = XFRM_POLICY_TYPE_MAIN;
1da177e4 1242 int err;
26b15dad 1243 struct km_event c;
1da177e4
LT		 1244 int delete;
1245
7b67c857 1246 p = nlmsg_data(nlh);
1da177e4
LT		 1247 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1248
35a7aa08 1249 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1250 if (err)
1251 return err;
1252
1da177e4
LT		 1253 err = verify_policy_dir(p->dir);
1254 if (err)
1255 return err;
1256
1257 if (p->index)
ef41aaa0 1258 xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err);
df71837d 1259 else {
5424f32e 1260 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
df71837d
TJ		 1261 struct xfrm_policy tmp;
1262
35a7aa08 1263 err = verify_sec_ctx_len(attrs);
df71837d
TJ		 1264 if (err)
1265 return err;
1266
1267 memset(&tmp, 0, sizeof(struct xfrm_policy));
1268 if (rt) {
5424f32e 1269 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
df71837d
TJ		 1270
1271 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1272 return err;
1273 }
ef41aaa0
EP		 1274 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1275 delete, &err);
df71837d
TJ		 1276 security_xfrm_policy_free(&tmp);
1277 }
1da177e4
LT		 1278 if (xp == NULL)
1279 return -ENOENT;
1280
1281 if (!delete) {
1282 struct sk_buff *resp_skb;
1283
1284 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1285 if (IS_ERR(resp_skb)) {
1286 err = PTR_ERR(resp_skb);
1287 } else {
082a1ad5
TG		 1288 err = nlmsg_unicast(xfrm_nl, resp_skb,
1289 NETLINK_CB(skb).pid);
1da177e4 1290 }
26b15dad 1291 } else {
ab5f5e8b
JL		 1292 xfrm_audit_policy_delete(xp, err ? 0 : 1,
1293 NETLINK_CB(skb).loginuid,
1294 NETLINK_CB(skb).sid);
13fcfbb0
DM		 1295
1296 if (err != 0)
c8c05a8e 1297 goto out;
13fcfbb0 1298
e7443892 1299 c.data.byid = p->index;
f60f6b8f 1300 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1301 c.seq = nlh->nlmsg_seq;
1302 c.pid = nlh->nlmsg_pid;
1303 km_policy_notify(xp, p->dir, &c);
1da177e4
LT		 1304 }
1305
c8c05a8e 1306out:
ef41aaa0 1307 xfrm_pol_put(xp);
1da177e4
LT		 1308 return err;
1309}
1310
22e70050 1311static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1312 struct nlattr **attrs)
1da177e4 1313{
26b15dad 1314 struct km_event c;
7b67c857 1315 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
161a09e7 1316 struct xfrm_audit audit_info;
4aa2e62c 1317 int err;
1da177e4 1318
161a09e7
JL		 1319 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1320 audit_info.secid = NETLINK_CB(skb).sid;
4aa2e62c
JL		 1321 err = xfrm_state_flush(p->proto, &audit_info);
1322 if (err)
1323 return err;
bf08867f 1324 c.data.proto = p->proto;
f60f6b8f 1325 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1326 c.seq = nlh->nlmsg_seq;
1327 c.pid = nlh->nlmsg_pid;
1328 km_state_notify(NULL, &c);
1329
1da177e4
LT		 1330 return 0;
1331}
1332
7deb2264
TG		 1333static inline size_t xfrm_aevent_msgsize(void)
1334{
1335 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1336 + nla_total_size(sizeof(struct xfrm_replay_state))
1337 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1338 + nla_total_size(4) /* XFRM_AE_RTHR */
1339 + nla_total_size(4); /* XFRM_AE_ETHR */
1340}
d51d081d
JHS		 1341
1342static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1343{
1344 struct xfrm_aevent_id *id;
1345 struct nlmsghdr *nlh;
d51d081d 1346
79b8b7f4
TG		 1347 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1348 if (nlh == NULL)
1349 return -EMSGSIZE;
d51d081d 1350
7b67c857 1351 id = nlmsg_data(nlh);
2b5f6dcc 1352 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
d51d081d
JHS		 1353 id->sa_id.spi = x->id.spi;
1354 id->sa_id.family = x->props.family;
1355 id->sa_id.proto = x->id.proto;
2b5f6dcc
JHS		 1356 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1357 id->reqid = x->props.reqid;
d51d081d
JHS		 1358 id->flags = c->data.aevent;
1359
c0144bea
TG		 1360 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1361 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
d51d081d 1362
c0144bea
TG		 1363 if (id->flags & XFRM_AE_RTHR)
1364 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
d51d081d 1365
c0144bea
TG		 1366 if (id->flags & XFRM_AE_ETHR)
1367 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1368 x->replay_maxage * 10 / HZ);
d51d081d 1369
9825069d 1370 return nlmsg_end(skb, nlh);
d51d081d 1371
c0144bea 1372nla_put_failure:
9825069d
TG		 1373 nlmsg_cancel(skb, nlh);
1374 return -EMSGSIZE;
d51d081d
JHS		 1375}
1376
22e70050 1377static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1378 struct nlattr **attrs)
d51d081d
JHS		 1379{
1380 struct xfrm_state *x;
1381 struct sk_buff *r_skb;
1382 int err;
1383 struct km_event c;
7b67c857 1384 struct xfrm_aevent_id *p = nlmsg_data(nlh);
d51d081d
JHS		 1385 struct xfrm_usersa_id *id = &p->sa_id;
1386
7deb2264 1387 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 1388 if (r_skb == NULL)
1389 return -ENOMEM;
1390
1391 x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family);
1392 if (x == NULL) {
b08d5840 1393 kfree_skb(r_skb);
d51d081d
JHS		 1394 return -ESRCH;
1395 }
1396
1397 /*
1398 * XXX: is this lock really needed - none of the other
1399 * gets lock (the concern is things getting updated
1400 * while we are still reading) - jhs
1401 */
1402 spin_lock_bh(&x->lock);
1403 c.data.aevent = p->flags;
1404 c.seq = nlh->nlmsg_seq;
1405 c.pid = nlh->nlmsg_pid;
1406
1407 if (build_aevent(r_skb, x, &c) < 0)
1408 BUG();
082a1ad5 1409 err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid);
d51d081d
JHS		 1410 spin_unlock_bh(&x->lock);
1411 xfrm_state_put(x);
1412 return err;
1413}
1414
22e70050 1415static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1416 struct nlattr **attrs)
d51d081d
JHS		 1417{
1418 struct xfrm_state *x;
1419 struct km_event c;
1420 int err = - EINVAL;
7b67c857 1421 struct xfrm_aevent_id *p = nlmsg_data(nlh);
5424f32e
TG		 1422 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1423 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
d51d081d
JHS		 1424
1425 if (!lt && !rp)
1426 return err;
1427
1428 /* pedantic mode - thou shalt sayeth replaceth */
1429 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1430 return err;
1431
1432 x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
1433 if (x == NULL)
1434 return -ESRCH;
1435
1436 if (x->km.state != XFRM_STATE_VALID)
1437 goto out;
1438
1439 spin_lock_bh(&x->lock);
35a7aa08 1440 xfrm_update_ae_params(x, attrs);
d51d081d 1441 spin_unlock_bh(&x->lock);
d51d081d
JHS		 1442
1443 c.event = nlh->nlmsg_type;
1444 c.seq = nlh->nlmsg_seq;
1445 c.pid = nlh->nlmsg_pid;
1446 c.data.aevent = XFRM_AE_CU;
1447 km_state_notify(x, &c);
1448 err = 0;
1449out:
1450 xfrm_state_put(x);
1451 return err;
1452}
1453
22e70050 1454static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1455 struct nlattr **attrs)
1da177e4 1456{
f7b6983f 1457 struct km_event c;
b798a9ed 1458 u8 type = XFRM_POLICY_TYPE_MAIN;
f7b6983f 1459 int err;
161a09e7 1460 struct xfrm_audit audit_info;
f7b6983f 1461
35a7aa08 1462 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1463 if (err)
1464 return err;
26b15dad 1465
161a09e7
JL		 1466 audit_info.loginuid = NETLINK_CB(skb).loginuid;
1467 audit_info.secid = NETLINK_CB(skb).sid;
4aa2e62c
JL		 1468 err = xfrm_policy_flush(type, &audit_info);
1469 if (err)
1470 return err;
f7b6983f 1471 c.data.type = type;
f60f6b8f 1472 c.event = nlh->nlmsg_type;
26b15dad
JHS		 1473 c.seq = nlh->nlmsg_seq;
1474 c.pid = nlh->nlmsg_pid;
1475 km_policy_notify(NULL, 0, &c);
1da177e4
LT		 1476 return 0;
1477}
1478
22e70050 1479static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1480 struct nlattr **attrs)
6c5c8ca7
JHS		 1481{
1482 struct xfrm_policy *xp;
7b67c857 1483 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
6c5c8ca7 1484 struct xfrm_userpolicy_info *p = &up->pol;
b798a9ed 1485 u8 type = XFRM_POLICY_TYPE_MAIN;
6c5c8ca7
JHS		 1486 int err = -ENOENT;
1487
35a7aa08 1488 err = copy_from_user_policy_type(&type, attrs);
f7b6983f
MN		 1489 if (err)
1490 return err;
1491
6c5c8ca7 1492 if (p->index)
ef41aaa0 1493 xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err);
6c5c8ca7 1494 else {
5424f32e 1495 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
6c5c8ca7
JHS		 1496 struct xfrm_policy tmp;
1497
35a7aa08 1498 err = verify_sec_ctx_len(attrs);
6c5c8ca7
JHS		 1499 if (err)
1500 return err;
1501
1502 memset(&tmp, 0, sizeof(struct xfrm_policy));
1503 if (rt) {
5424f32e 1504 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
6c5c8ca7
JHS		 1505
1506 if ((err = security_xfrm_policy_alloc(&tmp, uctx)))
1507 return err;
1508 }
ef41aaa0
EP		 1509 xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security,
1510 0, &err);
6c5c8ca7
JHS		 1511 security_xfrm_policy_free(&tmp);
1512 }
1513
1514 if (xp == NULL)
ef41aaa0
EP		 1515 return -ENOENT;
1516 read_lock(&xp->lock);
6c5c8ca7
JHS		 1517 if (xp->dead) {
1518 read_unlock(&xp->lock);
1519 goto out;
1520 }
1521
1522 read_unlock(&xp->lock);
1523 err = 0;
1524 if (up->hard) {
1525 xfrm_policy_delete(xp, p->dir);
ab5f5e8b
JL		 1526 xfrm_audit_policy_delete(xp, 1, NETLINK_CB(skb).loginuid,
1527 NETLINK_CB(skb).sid);
161a09e7 1528
6c5c8ca7
JHS		 1529 } else {
1530 // reset the timers here?
1531 printk("Dont know what to do with soft policy expire\n");
1532 }
1533 km_policy_expired(xp, p->dir, up->hard, current->pid);
1534
1535out:
1536 xfrm_pol_put(xp);
1537 return err;
1538}
1539
22e70050 1540static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1541 struct nlattr **attrs)
53bc6b4d
JHS		 1542{
1543 struct xfrm_state *x;
1544 int err;
7b67c857 1545 struct xfrm_user_expire *ue = nlmsg_data(nlh);
53bc6b4d
JHS		 1546 struct xfrm_usersa_info *p = &ue->state;
1547
1548 x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family);
53bc6b4d 1549
3a765aa5 1550 err = -ENOENT;
53bc6b4d
JHS		 1551 if (x == NULL)
1552 return err;
1553
53bc6b4d 1554 spin_lock_bh(&x->lock);
3a765aa5 1555 err = -EINVAL;
53bc6b4d
JHS		 1556 if (x->km.state != XFRM_STATE_VALID)
1557 goto out;
1558 km_state_expired(x, ue->hard, current->pid);
1559
161a09e7 1560 if (ue->hard) {
53bc6b4d 1561 __xfrm_state_delete(x);
ab5f5e8b
JL		 1562 xfrm_audit_state_delete(x, 1, NETLINK_CB(skb).loginuid,
1563 NETLINK_CB(skb).sid);
161a09e7 1564 }
3a765aa5 1565 err = 0;
53bc6b4d
JHS		 1566out:
1567 spin_unlock_bh(&x->lock);
1568 xfrm_state_put(x);
1569 return err;
1570}
1571
22e70050 1572static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1573 struct nlattr **attrs)
980ebd25
JHS		 1574{
1575 struct xfrm_policy *xp;
1576 struct xfrm_user_tmpl *ut;
1577 int i;
5424f32e 1578 struct nlattr *rt = attrs[XFRMA_TMPL];
980ebd25 1579
7b67c857 1580 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
980ebd25
JHS		 1581 struct xfrm_state *x = xfrm_state_alloc();
1582 int err = -ENOMEM;
1583
1584 if (!x)
1585 return err;
1586
1587 err = verify_newpolicy_info(&ua->policy);
1588 if (err) {
1589 printk("BAD policy passed\n");
1590 kfree(x);
1591 return err;
1592 }
1593
1594 /* build an XP */
5424f32e 1595 xp = xfrm_policy_construct(&ua->policy, attrs, &err);
b4ad86bf 1596 if (!xp) {
980ebd25
JHS		 1597 kfree(x);
1598 return err;
1599 }
1600
1601 memcpy(&x->id, &ua->id, sizeof(ua->id));
1602 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1603 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1604
5424f32e 1605 ut = nla_data(rt);
980ebd25
JHS		 1606 /* extract the templates and for each call km_key */
1607 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1608 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1609 memcpy(&x->id, &t->id, sizeof(x->id));
1610 x->props.mode = t->mode;
1611 x->props.reqid = t->reqid;
1612 x->props.family = ut->family;
1613 t->aalgos = ua->aalgos;
1614 t->ealgos = ua->ealgos;
1615 t->calgos = ua->calgos;
1616 err = km_query(x, t, xp);
1617
1618 }
1619
1620 kfree(x);
1621 kfree(xp);
1622
1623 return 0;
1624}
1625
5c79de6e 1626#ifdef CONFIG_XFRM_MIGRATE
5c79de6e 1627static int copy_from_user_migrate(struct xfrm_migrate *ma,
5424f32e 1628 struct nlattr **attrs, int *num)
5c79de6e 1629{
5424f32e 1630 struct nlattr *rt = attrs[XFRMA_MIGRATE];
5c79de6e
SS		 1631 struct xfrm_user_migrate *um;
1632 int i, num_migrate;
1633
5424f32e
TG		 1634 um = nla_data(rt);
1635 num_migrate = nla_len(rt) / sizeof(*um);
5c79de6e
SS		 1636
1637 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1638 return -EINVAL;
1639
1640 for (i = 0; i < num_migrate; i++, um++, ma++) {
1641 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1642 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1643 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1644 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1645
1646 ma->proto = um->proto;
1647 ma->mode = um->mode;
1648 ma->reqid = um->reqid;
1649
1650 ma->old_family = um->old_family;
1651 ma->new_family = um->new_family;
1652 }
1653
1654 *num = i;
1655 return 0;
1656}
1657
1658static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1659 struct nlattr **attrs)
5c79de6e 1660{
7b67c857 1661 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
5c79de6e
SS		 1662 struct xfrm_migrate m[XFRM_MAX_DEPTH];
1663 u8 type;
1664 int err;
1665 int n = 0;
1666
35a7aa08 1667 if (attrs[XFRMA_MIGRATE] == NULL)
cf5cb79f 1668 return -EINVAL;
5c79de6e 1669
5424f32e 1670 err = copy_from_user_policy_type(&type, attrs);
5c79de6e
SS		 1671 if (err)
1672 return err;
1673
1674 err = copy_from_user_migrate((struct xfrm_migrate *)m,
5424f32e 1675 attrs, &n);
5c79de6e
SS		 1676 if (err)
1677 return err;
1678
1679 if (!n)
1680 return 0;
1681
1682 xfrm_migrate(&pi->sel, pi->dir, type, m, n);
1683
1684 return 0;
1685}
1686#else
1687static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
5424f32e 1688 struct nlattr **attrs)
5c79de6e
SS		 1689{
1690 return -ENOPROTOOPT;
1691}
1692#endif
1693
1694#ifdef CONFIG_XFRM_MIGRATE
1695static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1696{
1697 struct xfrm_user_migrate um;
1698
1699 memset(&um, 0, sizeof(um));
1700 um.proto = m->proto;
1701 um.mode = m->mode;
1702 um.reqid = m->reqid;
1703 um.old_family = m->old_family;
1704 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1705 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1706 um.new_family = m->new_family;
1707 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1708 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1709
c0144bea 1710 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
5c79de6e
SS		 1711}
1712
7deb2264
TG		 1713static inline size_t xfrm_migrate_msgsize(int num_migrate)
1714{
1715 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
1716 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1717 + userpolicy_type_attrsize();
1718}
1719
5c79de6e
SS		 1720static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
1721 int num_migrate, struct xfrm_selector *sel,
1722 u8 dir, u8 type)
1723{
1724 struct xfrm_migrate *mp;
1725 struct xfrm_userpolicy_id *pol_id;
1726 struct nlmsghdr *nlh;
5c79de6e
SS		 1727 int i;
1728
79b8b7f4
TG		 1729 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1730 if (nlh == NULL)
1731 return -EMSGSIZE;
5c79de6e 1732
7b67c857 1733 pol_id = nlmsg_data(nlh);
5c79de6e
SS		 1734 /* copy data from selector, dir, and type to the pol_id */
1735 memset(pol_id, 0, sizeof(*pol_id));
1736 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1737 pol_id->dir = dir;
1738
1739 if (copy_to_user_policy_type(type, skb) < 0)
1740 goto nlmsg_failure;
1741
1742 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1743 if (copy_to_user_migrate(mp, skb) < 0)
1744 goto nlmsg_failure;
1745 }
1746
9825069d 1747 return nlmsg_end(skb, nlh);
5c79de6e 1748nlmsg_failure:
9825069d
TG		 1749 nlmsg_cancel(skb, nlh);
1750 return -EMSGSIZE;
5c79de6e
SS		 1751}
1752
1753static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1754 struct xfrm_migrate *m, int num_migrate)
1755{
1756 struct sk_buff *skb;
5c79de6e 1757
7deb2264 1758 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC);
5c79de6e
SS		 1759 if (skb == NULL)
1760 return -ENOMEM;
1761
1762 /* build migrate */
1763 if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0)
1764 BUG();
1765
082a1ad5 1766 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
5c79de6e
SS		 1767}
1768#else
1769static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
1770 struct xfrm_migrate *m, int num_migrate)
1771{
1772 return -ENOPROTOOPT;
1773}
1774#endif
d51d081d 1775
a7bd9a45 1776#define XMSGSIZE(type) sizeof(struct type)
492b558b
TG		 1777
1778static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
1779 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
1780 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1781 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
1782 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1783 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1784 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
1785 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
980ebd25 1786 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
53bc6b4d 1787 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
492b558b
TG		 1788 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
1789 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
6c5c8ca7 1790 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
492b558b 1791 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
a7bd9a45 1792 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
d51d081d
JHS		 1793 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
1794 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
97a64b45 1795 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
5c79de6e 1796 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
a7bd9a45
TG		 1797 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
1798 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
1da177e4
LT		 1799};
1800
492b558b
TG		 1801#undef XMSGSIZE
1802
cf5cb79f
TG		 1803static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
1804 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
1805 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
1806 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
1807 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
1808 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
1809 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
1810 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
1811 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
1812 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
1813 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
1814 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
1815 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
1816 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
1817 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
1818};
1819
1da177e4 1820static struct xfrm_link {
5424f32e 1821 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
1da177e4 1822 int (*dump)(struct sk_buff *, struct netlink_callback *);
492b558b
TG		 1823} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
1824 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
1825 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
1826 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
1827 .dump = xfrm_dump_sa },
1828 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1829 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
1830 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
1831 .dump = xfrm_dump_policy },
1832 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
980ebd25 1833 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
53bc6b4d 1834 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
492b558b
TG		 1835 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
1836 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
6c5c8ca7 1837 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
492b558b
TG		 1838 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
1839 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
d51d081d
JHS		 1840 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
1841 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
5c79de6e 1842 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
566ec034 1843 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
ecfd6b18 1844 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
1da177e4
LT		 1845};
1846
1d00a4eb 1847static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
1da177e4 1848{
35a7aa08 1849 struct nlattr *attrs[XFRMA_MAX+1];
1da177e4 1850 struct xfrm_link *link;
a7bd9a45 1851 int type, err;
1da177e4 1852
1da177e4 1853 type = nlh->nlmsg_type;
1da177e4 1854 if (type > XFRM_MSG_MAX)
1d00a4eb 1855 return -EINVAL;
1da177e4
LT		 1856
1857 type -= XFRM_MSG_BASE;
1858 link = &xfrm_dispatch[type];
1859
1860 /* All operations require privileges, even GET */
1d00a4eb
TG		 1861 if (security_netlink_recv(skb, CAP_NET_ADMIN))
1862 return -EPERM;
1da177e4 1863
492b558b
TG		 1864 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
1865 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
1866 (nlh->nlmsg_flags & NLM_F_DUMP)) {
1da177e4 1867 if (link->dump == NULL)
1d00a4eb 1868 return -EINVAL;
88fc2c84 1869
c702e804 1870 return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL);
1da177e4
LT		 1871 }
1872
35a7aa08 1873 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
cf5cb79f 1874 xfrma_policy);
a7bd9a45
TG		 1875 if (err < 0)
1876 return err;
1da177e4
LT		 1877
1878 if (link->doit == NULL)
1d00a4eb 1879 return -EINVAL;
1da177e4 1880
5424f32e 1881 return link->doit(skb, nlh, attrs);
1da177e4
LT		 1882}
1883
1da177e4
LT		 1884static void xfrm_netlink_rcv(struct sock *sk, int len)
1885{
88fc2c84 1886 unsigned int qlen = 0;
2a0a6ebe 1887
1da177e4 1888 do {
4a3e2f71 1889 mutex_lock(&xfrm_cfg_mutex);
88fc2c84 1890 netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg);
4a3e2f71 1891 mutex_unlock(&xfrm_cfg_mutex);
1da177e4 1892
2a0a6ebe 1893 } while (qlen);
1da177e4
LT		 1894}
1895
7deb2264
TG		 1896static inline size_t xfrm_expire_msgsize(void)
1897{
1898 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
1899}
1900
d51d081d 1901static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 1902{
1903 struct xfrm_user_expire *ue;
1904 struct nlmsghdr *nlh;
1da177e4 1905
79b8b7f4
TG		 1906 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
1907 if (nlh == NULL)
1908 return -EMSGSIZE;
1da177e4 1909
7b67c857 1910 ue = nlmsg_data(nlh);
1da177e4 1911 copy_to_user_state(x, &ue->state);
d51d081d 1912 ue->hard = (c->data.hard != 0) ? 1 : 0;
1da177e4 1913
9825069d 1914 return nlmsg_end(skb, nlh);
1da177e4
LT		 1915}
1916
26b15dad 1917static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
1da177e4
LT		 1918{
1919 struct sk_buff *skb;
1920
7deb2264 1921 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
1da177e4
LT		 1922 if (skb == NULL)
1923 return -ENOMEM;
1924
d51d081d 1925 if (build_expire(skb, x, c) < 0)
1da177e4
LT		 1926 BUG();
1927
082a1ad5 1928 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 1929}
1930
d51d081d
JHS		 1931static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
1932{
1933 struct sk_buff *skb;
d51d081d 1934
7deb2264 1935 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
d51d081d
JHS		 1936 if (skb == NULL)
1937 return -ENOMEM;
1938
1939 if (build_aevent(skb, x, c) < 0)
1940 BUG();
1941
082a1ad5 1942 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
d51d081d
JHS		 1943}
1944
26b15dad
JHS		 1945static int xfrm_notify_sa_flush(struct km_event *c)
1946{
1947 struct xfrm_usersa_flush *p;
1948 struct nlmsghdr *nlh;
1949 struct sk_buff *skb;
7deb2264 1950 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
26b15dad 1951
7deb2264 1952 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 1953 if (skb == NULL)
1954 return -ENOMEM;
26b15dad 1955
79b8b7f4
TG		 1956 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
1957 if (nlh == NULL) {
1958 kfree_skb(skb);
1959 return -EMSGSIZE;
1960 }
26b15dad 1961
7b67c857 1962 p = nlmsg_data(nlh);
bf08867f 1963 p->proto = c->data.proto;
26b15dad 1964
9825069d 1965 nlmsg_end(skb, nlh);
26b15dad 1966
082a1ad5 1967 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad
JHS		 1968}
1969
7deb2264 1970static inline size_t xfrm_sa_len(struct xfrm_state *x)
26b15dad 1971{
7deb2264 1972 size_t l = 0;
26b15dad 1973 if (x->aalg)
7deb2264 1974 l += nla_total_size(alg_len(x->aalg));
26b15dad 1975 if (x->ealg)
7deb2264 1976 l += nla_total_size(alg_len(x->ealg));
26b15dad 1977 if (x->calg)
7deb2264 1978 l += nla_total_size(sizeof(*x->calg));
26b15dad 1979 if (x->encap)
7deb2264 1980 l += nla_total_size(sizeof(*x->encap));
26b15dad
JHS		 1981
1982 return l;
1983}
1984
1985static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
1986{
1987 struct xfrm_usersa_info *p;
0603eac0 1988 struct xfrm_usersa_id *id;
26b15dad
JHS		 1989 struct nlmsghdr *nlh;
1990 struct sk_buff *skb;
26b15dad 1991 int len = xfrm_sa_len(x);
0603eac0
HX		 1992 int headlen;
1993
1994 headlen = sizeof(*p);
1995 if (c->event == XFRM_MSG_DELSA) {
7deb2264 1996 len += nla_total_size(headlen);
0603eac0
HX		 1997 headlen = sizeof(*id);
1998 }
7deb2264 1999 len += NLMSG_ALIGN(headlen);
26b15dad 2000
7deb2264 2001 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2002 if (skb == NULL)
2003 return -ENOMEM;
26b15dad 2004
79b8b7f4
TG		 2005 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2006 if (nlh == NULL)
c0144bea 2007 goto nla_put_failure;
26b15dad 2008
7b67c857 2009 p = nlmsg_data(nlh);
0603eac0 2010 if (c->event == XFRM_MSG_DELSA) {
c0144bea
TG		 2011 struct nlattr *attr;
2012
7b67c857 2013 id = nlmsg_data(nlh);
0603eac0
HX		 2014 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2015 id->spi = x->id.spi;
2016 id->family = x->props.family;
2017 id->proto = x->id.proto;
2018
c0144bea
TG		 2019 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2020 if (attr == NULL)
2021 goto nla_put_failure;
2022
2023 p = nla_data(attr);
0603eac0
HX		 2024 }
2025
26b15dad
JHS		 2026 copy_to_user_state(x, p);
2027
2028 if (x->aalg)
c26445ac 2029 NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg);
26b15dad 2030 if (x->ealg)
c26445ac 2031 NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg);
26b15dad 2032 if (x->calg)
c0144bea 2033 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
26b15dad
JHS		 2034
2035 if (x->encap)
c0144bea 2036 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
26b15dad 2037
9825069d 2038 nlmsg_end(skb, nlh);
26b15dad 2039
082a1ad5 2040 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
26b15dad 2041
c0144bea 2042nla_put_failure:
26b15dad
JHS		 2043 kfree_skb(skb);
2044 return -1;
2045}
2046
2047static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2048{
2049
2050 switch (c->event) {
f60f6b8f 2051 case XFRM_MSG_EXPIRE:
26b15dad 2052 return xfrm_exp_state_notify(x, c);
d51d081d
JHS		 2053 case XFRM_MSG_NEWAE:
2054 return xfrm_aevent_state_notify(x, c);
f60f6b8f
HX		 2055 case XFRM_MSG_DELSA:
2056 case XFRM_MSG_UPDSA:
2057 case XFRM_MSG_NEWSA:
26b15dad 2058 return xfrm_notify_sa(x, c);
f60f6b8f 2059 case XFRM_MSG_FLUSHSA:
26b15dad
JHS		 2060 return xfrm_notify_sa_flush(c);
2061 default:
2062 printk("xfrm_user: Unknown SA event %d\n", c->event);
2063 break;
2064 }
2065
2066 return 0;
2067
2068}
2069
7deb2264
TG		 2070static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2071 struct xfrm_policy *xp)
2072{
2073 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2074 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2075 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2076 + userpolicy_type_attrsize();
2077}
2078
1da177e4
LT		 2079static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2080 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2081 int dir)
2082{
2083 struct xfrm_user_acquire *ua;
2084 struct nlmsghdr *nlh;
1da177e4
LT		 2085 __u32 seq = xfrm_get_acqseq();
2086
79b8b7f4
TG		 2087 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2088 if (nlh == NULL)
2089 return -EMSGSIZE;
1da177e4 2090
7b67c857 2091 ua = nlmsg_data(nlh);
1da177e4
LT		 2092 memcpy(&ua->id, &x->id, sizeof(ua->id));
2093 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2094 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2095 copy_to_user_policy(xp, &ua->policy, dir);
2096 ua->aalgos = xt->aalgos;
2097 ua->ealgos = xt->ealgos;
2098 ua->calgos = xt->calgos;
2099 ua->seq = x->km.seq = seq;
2100
2101 if (copy_to_user_tmpl(xp, skb) < 0)
2102 goto nlmsg_failure;
0d681623 2103 if (copy_to_user_state_sec_ctx(x, skb))
df71837d 2104 goto nlmsg_failure;
1459bb36 2105 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2106 goto nlmsg_failure;
1da177e4 2107
9825069d 2108 return nlmsg_end(skb, nlh);
1da177e4
LT		 2109
2110nlmsg_failure:
9825069d
TG		 2111 nlmsg_cancel(skb, nlh);
2112 return -EMSGSIZE;
1da177e4
LT		 2113}
2114
2115static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2116 struct xfrm_policy *xp, int dir)
2117{
2118 struct sk_buff *skb;
1da177e4 2119
7deb2264 2120 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
1da177e4
LT		 2121 if (skb == NULL)
2122 return -ENOMEM;
2123
2124 if (build_acquire(skb, x, xt, xp, dir) < 0)
2125 BUG();
2126
082a1ad5 2127 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
1da177e4
LT		 2128}
2129
2130/* User gives us xfrm_user_policy_info followed by an array of 0
2131 * or more templates.
2132 */
cb969f07 2133static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
1da177e4
LT		 2134 u8 *data, int len, int *dir)
2135{
2136 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2137 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2138 struct xfrm_policy *xp;
2139 int nr;
2140
cb969f07 2141 switch (sk->sk_family) {
1da177e4
LT		 2142 case AF_INET:
2143 if (opt != IP_XFRM_POLICY) {
2144 *dir = -EOPNOTSUPP;
2145 return NULL;
2146 }
2147 break;
2148#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2149 case AF_INET6:
2150 if (opt != IPV6_XFRM_POLICY) {
2151 *dir = -EOPNOTSUPP;
2152 return NULL;
2153 }
2154 break;
2155#endif
2156 default:
2157 *dir = -EINVAL;
2158 return NULL;
2159 }
2160
2161 *dir = -EINVAL;
2162
2163 if (len < sizeof(*p) ||
2164 verify_newpolicy_info(p))
2165 return NULL;
2166
2167 nr = ((len - sizeof(*p)) / sizeof(*ut));
b4ad86bf 2168 if (validate_tmpl(nr, ut, p->sel.family))
1da177e4
LT		 2169 return NULL;
2170
a4f1bac6
HX		 2171 if (p->dir > XFRM_POLICY_OUT)
2172 return NULL;
2173
1da177e4
LT		 2174 xp = xfrm_policy_alloc(GFP_KERNEL);
2175 if (xp == NULL) {
2176 *dir = -ENOBUFS;
2177 return NULL;
2178 }
2179
2180 copy_from_user_policy(xp, p);
f7b6983f 2181 xp->type = XFRM_POLICY_TYPE_MAIN;
1da177e4
LT		 2182 copy_templates(xp, ut, nr);
2183
2184 *dir = p->dir;
2185
2186 return xp;
2187}
2188
7deb2264
TG		 2189static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2190{
2191 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2192 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2193 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2194 + userpolicy_type_attrsize();
2195}
2196
1da177e4 2197static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
d51d081d 2198 int dir, struct km_event *c)
1da177e4
LT		 2199{
2200 struct xfrm_user_polexpire *upe;
2201 struct nlmsghdr *nlh;
d51d081d 2202 int hard = c->data.hard;
1da177e4 2203
79b8b7f4
TG		 2204 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2205 if (nlh == NULL)
2206 return -EMSGSIZE;
1da177e4 2207
7b67c857 2208 upe = nlmsg_data(nlh);
1da177e4
LT		 2209 copy_to_user_policy(xp, &upe->pol, dir);
2210 if (copy_to_user_tmpl(xp, skb) < 0)
2211 goto nlmsg_failure;
df71837d
TJ		 2212 if (copy_to_user_sec_ctx(xp, skb))
2213 goto nlmsg_failure;
1459bb36 2214 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2215 goto nlmsg_failure;
1da177e4
LT		 2216 upe->hard = !!hard;
2217
9825069d 2218 return nlmsg_end(skb, nlh);
1da177e4
LT		 2219
2220nlmsg_failure:
9825069d
TG		 2221 nlmsg_cancel(skb, nlh);
2222 return -EMSGSIZE;
1da177e4
LT		 2223}
2224
26b15dad 2225static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
1da177e4
LT		 2226{
2227 struct sk_buff *skb;
1da177e4 2228
7deb2264 2229 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
1da177e4
LT		 2230 if (skb == NULL)
2231 return -ENOMEM;
2232
d51d081d 2233 if (build_polexpire(skb, xp, dir, c) < 0)
1da177e4
LT		 2234 BUG();
2235
082a1ad5 2236 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
1da177e4
LT		 2237}
2238
26b15dad
JHS		 2239static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2240{
2241 struct xfrm_userpolicy_info *p;
0603eac0 2242 struct xfrm_userpolicy_id *id;
26b15dad
JHS		 2243 struct nlmsghdr *nlh;
2244 struct sk_buff *skb;
7deb2264 2245 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
0603eac0
HX		 2246 int headlen;
2247
2248 headlen = sizeof(*p);
2249 if (c->event == XFRM_MSG_DELPOLICY) {
7deb2264 2250 len += nla_total_size(headlen);
0603eac0
HX		 2251 headlen = sizeof(*id);
2252 }
cfbfd45a 2253 len += userpolicy_type_attrsize();
7deb2264 2254 len += NLMSG_ALIGN(headlen);
26b15dad 2255
7deb2264 2256 skb = nlmsg_new(len, GFP_ATOMIC);
26b15dad
JHS		 2257 if (skb == NULL)
2258 return -ENOMEM;
26b15dad 2259
79b8b7f4
TG		 2260 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2261 if (nlh == NULL)
2262 goto nlmsg_failure;
26b15dad 2263
7b67c857 2264 p = nlmsg_data(nlh);
0603eac0 2265 if (c->event == XFRM_MSG_DELPOLICY) {
c0144bea
TG		 2266 struct nlattr *attr;
2267
7b67c857 2268 id = nlmsg_data(nlh);
0603eac0
HX		 2269 memset(id, 0, sizeof(*id));
2270 id->dir = dir;
2271 if (c->data.byid)
2272 id->index = xp->index;
2273 else
2274 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2275
c0144bea
TG		 2276 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2277 if (attr == NULL)
2278 goto nlmsg_failure;
2279
2280 p = nla_data(attr);
0603eac0 2281 }
26b15dad 2282
26b15dad
JHS		 2283 copy_to_user_policy(xp, p, dir);
2284 if (copy_to_user_tmpl(xp, skb) < 0)
2285 goto nlmsg_failure;
1459bb36 2286 if (copy_to_user_policy_type(xp->type, skb) < 0)
f7b6983f 2287 goto nlmsg_failure;
26b15dad 2288
9825069d 2289 nlmsg_end(skb, nlh);
26b15dad 2290
082a1ad5 2291 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2292
2293nlmsg_failure:
2294 kfree_skb(skb);
2295 return -1;
2296}
2297
2298static int xfrm_notify_policy_flush(struct km_event *c)
2299{
2300 struct nlmsghdr *nlh;
2301 struct sk_buff *skb;
26b15dad 2302
7deb2264 2303 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
26b15dad
JHS		 2304 if (skb == NULL)
2305 return -ENOMEM;
26b15dad 2306
79b8b7f4
TG		 2307 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2308 if (nlh == NULL)
2309 goto nlmsg_failure;
0c51f53c
JHS		 2310 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2311 goto nlmsg_failure;
26b15dad 2312
9825069d 2313 nlmsg_end(skb, nlh);
26b15dad 2314
082a1ad5 2315 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
26b15dad
JHS		 2316
2317nlmsg_failure:
2318 kfree_skb(skb);
2319 return -1;
2320}
2321
2322static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2323{
2324
2325 switch (c->event) {
f60f6b8f
HX		 2326 case XFRM_MSG_NEWPOLICY:
2327 case XFRM_MSG_UPDPOLICY:
2328 case XFRM_MSG_DELPOLICY:
26b15dad 2329 return xfrm_notify_policy(xp, dir, c);
f60f6b8f 2330 case XFRM_MSG_FLUSHPOLICY:
26b15dad 2331 return xfrm_notify_policy_flush(c);
f60f6b8f 2332 case XFRM_MSG_POLEXPIRE:
26b15dad
JHS		 2333 return xfrm_exp_policy_notify(xp, dir, c);
2334 default:
2335 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2336 }
2337
2338 return 0;
2339
2340}
2341
7deb2264
TG		 2342static inline size_t xfrm_report_msgsize(void)
2343{
2344 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2345}
2346
97a64b45
MN		 2347static int build_report(struct sk_buff *skb, u8 proto,
2348 struct xfrm_selector *sel, xfrm_address_t *addr)
2349{
2350 struct xfrm_user_report *ur;
2351 struct nlmsghdr *nlh;
97a64b45 2352
79b8b7f4
TG		 2353 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2354 if (nlh == NULL)
2355 return -EMSGSIZE;
97a64b45 2356
7b67c857 2357 ur = nlmsg_data(nlh);
97a64b45
MN		 2358 ur->proto = proto;
2359 memcpy(&ur->sel, sel, sizeof(ur->sel));
2360
2361 if (addr)
c0144bea 2362 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
97a64b45 2363
9825069d 2364 return nlmsg_end(skb, nlh);
97a64b45 2365
c0144bea 2366nla_put_failure:
9825069d
TG		 2367 nlmsg_cancel(skb, nlh);
2368 return -EMSGSIZE;
97a64b45
MN		 2369}
2370
2371static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
2372 xfrm_address_t *addr)
2373{
2374 struct sk_buff *skb;
97a64b45 2375
7deb2264 2376 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
97a64b45
MN		 2377 if (skb == NULL)
2378 return -ENOMEM;
2379
2380 if (build_report(skb, proto, sel, addr) < 0)
2381 BUG();
2382
082a1ad5 2383 return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
97a64b45
MN		 2384}
2385
1da177e4
LT		 2386static struct xfrm_mgr netlink_mgr = {
2387 .id = "netlink",
2388 .notify = xfrm_send_state_notify,
2389 .acquire = xfrm_send_acquire,
2390 .compile_policy = xfrm_compile_policy,
2391 .notify_policy = xfrm_send_policy_notify,
97a64b45 2392 .report = xfrm_send_report,
5c79de6e 2393 .migrate = xfrm_send_migrate,
1da177e4
LT		 2394};
2395
2396static int __init xfrm_user_init(void)
2397{
be33690d
PM		 2398 struct sock *nlsk;
2399
654b32c6 2400 printk(KERN_INFO "Initializing XFRM netlink socket\n");
1da177e4 2401
b4b51029 2402 nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX,
af65bdfc 2403 xfrm_netlink_rcv, NULL, THIS_MODULE);
be33690d 2404 if (nlsk == NULL)
1da177e4 2405 return -ENOMEM;
be33690d 2406 rcu_assign_pointer(xfrm_nl, nlsk);
1da177e4
LT		 2407
2408 xfrm_register_km(&netlink_mgr);
2409
2410 return 0;
2411}
2412
2413static void __exit xfrm_user_exit(void)
2414{
be33690d
PM		 2415 struct sock *nlsk = xfrm_nl;
2416
1da177e4 2417 xfrm_unregister_km(&netlink_mgr);
be33690d
PM		 2418 rcu_assign_pointer(xfrm_nl, NULL);
2419 synchronize_rcu();
2420 sock_release(nlsk->sk_socket);
1da177e4
LT		 2421}
2422
2423module_init(xfrm_user_init);
2424module_exit(xfrm_user_exit);
2425MODULE_LICENSE("GPL");
4fdb3bb7 2426MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
f8cd5488 2427
Linux kernel - Deliverables
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