blob: e0d747a2e80341eb736c4348212770c3db41c4ad [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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
Trent Jaegerdf718372005-12-13 23:12:27 -080010 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 */
12
Herbert Xu9409f382006-08-06 19:49:12 +100013#include <linux/crypto.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#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>
Thomas Graf88fc2c82005-11-10 02:25:54 +010028#include <net/netlink.h>
Nicolas Dichtelfa6dd8a2011-01-11 08:04:12 +000029#include <net/ah.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <asm/uaccess.h>
Eric Dumazetdfd56b82011-12-10 09:48:31 +000031#if IS_ENABLED(CONFIG_IPV6)
Masahide NAKAMURAe23c7192006-08-23 20:33:28 -070032#include <linux/in6.h>
33#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070034
Herbert Xu1a6509d2008-01-28 19:37:29 -080035static inline int aead_len(struct xfrm_algo_aead *alg)
36{
37 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
38}
39
Thomas Graf5424f322007-08-22 14:01:33 -070040static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
Linus Torvalds1da177e2005-04-16 15:20:36 -070041{
Thomas Graf5424f322007-08-22 14:01:33 -070042 struct nlattr *rt = attrs[type];
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 struct xfrm_algo *algp;
44
45 if (!rt)
46 return 0;
47
Thomas Graf5424f322007-08-22 14:01:33 -070048 algp = nla_data(rt);
Eric Dumazet0f99be02008-01-08 23:39:06 -080049 if (nla_len(rt) < xfrm_alg_len(algp))
Herbert Xu31c26852005-05-19 12:39:49 -070050 return -EINVAL;
51
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 switch (type) {
53 case XFRMA_ALG_AUTH:
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 case XFRMA_ALG_CRYPT:
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 case XFRMA_ALG_COMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 break;
57
58 default:
59 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -070060 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
62 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
63 return 0;
64}
65
Martin Willi4447bb32009-11-25 00:29:52 +000066static int verify_auth_trunc(struct nlattr **attrs)
67{
68 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
69 struct xfrm_algo_auth *algp;
70
71 if (!rt)
72 return 0;
73
74 algp = nla_data(rt);
75 if (nla_len(rt) < xfrm_alg_auth_len(algp))
76 return -EINVAL;
77
78 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
79 return 0;
80}
81
Herbert Xu1a6509d2008-01-28 19:37:29 -080082static int verify_aead(struct nlattr **attrs)
83{
84 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
85 struct xfrm_algo_aead *algp;
86
87 if (!rt)
88 return 0;
89
90 algp = nla_data(rt);
91 if (nla_len(rt) < aead_len(algp))
92 return -EINVAL;
93
94 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
95 return 0;
96}
97
Thomas Graf5424f322007-08-22 14:01:33 -070098static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -070099 xfrm_address_t **addrp)
100{
Thomas Graf5424f322007-08-22 14:01:33 -0700101 struct nlattr *rt = attrs[type];
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700102
Thomas Grafcf5cb792007-08-22 13:59:04 -0700103 if (rt && addrp)
Thomas Graf5424f322007-08-22 14:01:33 -0700104 *addrp = nla_data(rt);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700105}
Trent Jaegerdf718372005-12-13 23:12:27 -0800106
Thomas Graf5424f322007-08-22 14:01:33 -0700107static inline int verify_sec_ctx_len(struct nlattr **attrs)
Trent Jaegerdf718372005-12-13 23:12:27 -0800108{
Thomas Graf5424f322007-08-22 14:01:33 -0700109 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Trent Jaegerdf718372005-12-13 23:12:27 -0800110 struct xfrm_user_sec_ctx *uctx;
Trent Jaegerdf718372005-12-13 23:12:27 -0800111
112 if (!rt)
113 return 0;
114
Thomas Graf5424f322007-08-22 14:01:33 -0700115 uctx = nla_data(rt);
Thomas Grafcf5cb792007-08-22 13:59:04 -0700116 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
Trent Jaegerdf718372005-12-13 23:12:27 -0800117 return -EINVAL;
118
119 return 0;
120}
121
Steffen Klassertd8647b72011-03-08 00:10:27 +0000122static inline int verify_replay(struct xfrm_usersa_info *p,
123 struct nlattr **attrs)
124{
125 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
126
Steffen Klassert7833aa02011-04-25 19:41:21 +0000127 if ((p->flags & XFRM_STATE_ESN) && !rt)
128 return -EINVAL;
129
Steffen Klassertd8647b72011-03-08 00:10:27 +0000130 if (!rt)
131 return 0;
132
Steffen Klassert02aadf72011-03-28 19:48:09 +0000133 if (p->id.proto != IPPROTO_ESP)
134 return -EINVAL;
135
Steffen Klassertd8647b72011-03-08 00:10:27 +0000136 if (p->replay_window != 0)
137 return -EINVAL;
138
139 return 0;
140}
Trent Jaegerdf718372005-12-13 23:12:27 -0800141
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142static int verify_newsa_info(struct xfrm_usersa_info *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700143 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144{
145 int err;
146
147 err = -EINVAL;
148 switch (p->family) {
149 case AF_INET:
150 break;
151
152 case AF_INET6:
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000153#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 break;
155#else
156 err = -EAFNOSUPPORT;
157 goto out;
158#endif
159
160 default:
161 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700162 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164 err = -EINVAL;
165 switch (p->id.proto) {
166 case IPPROTO_AH:
Martin Willi4447bb32009-11-25 00:29:52 +0000167 if ((!attrs[XFRMA_ALG_AUTH] &&
168 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800169 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700170 attrs[XFRMA_ALG_CRYPT] ||
Martin Willi35d28562010-12-08 04:37:49 +0000171 attrs[XFRMA_ALG_COMP] ||
172 attrs[XFRMA_TFCPAD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 goto out;
174 break;
175
176 case IPPROTO_ESP:
Herbert Xu1a6509d2008-01-28 19:37:29 -0800177 if (attrs[XFRMA_ALG_COMP])
178 goto out;
179 if (!attrs[XFRMA_ALG_AUTH] &&
Martin Willi4447bb32009-11-25 00:29:52 +0000180 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
Herbert Xu1a6509d2008-01-28 19:37:29 -0800181 !attrs[XFRMA_ALG_CRYPT] &&
182 !attrs[XFRMA_ALG_AEAD])
183 goto out;
184 if ((attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000185 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800186 attrs[XFRMA_ALG_CRYPT]) &&
187 attrs[XFRMA_ALG_AEAD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 goto out;
Martin Willi35d28562010-12-08 04:37:49 +0000189 if (attrs[XFRMA_TFCPAD] &&
190 p->mode != XFRM_MODE_TUNNEL)
191 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 break;
193
194 case IPPROTO_COMP:
Thomas Graf35a7aa02007-08-22 14:00:40 -0700195 if (!attrs[XFRMA_ALG_COMP] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800196 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700197 attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000198 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Martin Willi35d28562010-12-08 04:37:49 +0000199 attrs[XFRMA_ALG_CRYPT] ||
200 attrs[XFRMA_TFCPAD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 goto out;
202 break;
203
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000204#if IS_ENABLED(CONFIG_IPV6)
Masahide NAKAMURAe23c7192006-08-23 20:33:28 -0700205 case IPPROTO_DSTOPTS:
206 case IPPROTO_ROUTING:
Thomas Graf35a7aa02007-08-22 14:00:40 -0700207 if (attrs[XFRMA_ALG_COMP] ||
208 attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000209 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800210 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700211 attrs[XFRMA_ALG_CRYPT] ||
212 attrs[XFRMA_ENCAP] ||
213 attrs[XFRMA_SEC_CTX] ||
Martin Willi35d28562010-12-08 04:37:49 +0000214 attrs[XFRMA_TFCPAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700215 !attrs[XFRMA_COADDR])
Masahide NAKAMURAe23c7192006-08-23 20:33:28 -0700216 goto out;
217 break;
218#endif
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 default:
221 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700222 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Herbert Xu1a6509d2008-01-28 19:37:29 -0800224 if ((err = verify_aead(attrs)))
225 goto out;
Martin Willi4447bb32009-11-25 00:29:52 +0000226 if ((err = verify_auth_trunc(attrs)))
227 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700228 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700230 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700232 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700234 if ((err = verify_sec_ctx_len(attrs)))
Trent Jaegerdf718372005-12-13 23:12:27 -0800235 goto out;
Steffen Klassertd8647b72011-03-08 00:10:27 +0000236 if ((err = verify_replay(p, attrs)))
237 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
239 err = -EINVAL;
240 switch (p->mode) {
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700241 case XFRM_MODE_TRANSPORT:
242 case XFRM_MODE_TUNNEL:
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700243 case XFRM_MODE_ROUTEOPTIMIZATION:
Diego Beltrami0a694522006-10-03 23:47:05 -0700244 case XFRM_MODE_BEET:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 break;
246
247 default:
248 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700249 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251 err = 0;
252
253out:
254 return err;
255}
256
257static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
David S. Miller6f2f19e2011-02-27 23:04:45 -0800258 struct xfrm_algo_desc *(*get_byname)(const char *, int),
Thomas Graf5424f322007-08-22 14:01:33 -0700259 struct nlattr *rta)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 struct xfrm_algo *p, *ualg;
262 struct xfrm_algo_desc *algo;
263
264 if (!rta)
265 return 0;
266
Thomas Graf5424f322007-08-22 14:01:33 -0700267 ualg = nla_data(rta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
269 algo = get_byname(ualg->alg_name, 1);
270 if (!algo)
271 return -ENOSYS;
272 *props = algo->desc.sadb_alg_id;
273
Eric Dumazet0f99be02008-01-08 23:39:06 -0800274 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 if (!p)
276 return -ENOMEM;
277
Herbert Xu04ff1262006-08-13 08:50:00 +1000278 strcpy(p->alg_name, algo->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 *algpp = p;
280 return 0;
281}
282
Martin Willi4447bb32009-11-25 00:29:52 +0000283static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
284 struct nlattr *rta)
285{
286 struct xfrm_algo *ualg;
287 struct xfrm_algo_auth *p;
288 struct xfrm_algo_desc *algo;
289
290 if (!rta)
291 return 0;
292
293 ualg = nla_data(rta);
294
295 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
296 if (!algo)
297 return -ENOSYS;
298 *props = algo->desc.sadb_alg_id;
299
300 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
301 if (!p)
302 return -ENOMEM;
303
304 strcpy(p->alg_name, algo->name);
305 p->alg_key_len = ualg->alg_key_len;
306 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
307 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
308
309 *algpp = p;
310 return 0;
311}
312
313static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
314 struct nlattr *rta)
315{
316 struct xfrm_algo_auth *p, *ualg;
317 struct xfrm_algo_desc *algo;
318
319 if (!rta)
320 return 0;
321
322 ualg = nla_data(rta);
323
324 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
325 if (!algo)
326 return -ENOSYS;
Nicolas Dichtelfa6dd8a2011-01-11 08:04:12 +0000327 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
328 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
Martin Willi4447bb32009-11-25 00:29:52 +0000329 return -EINVAL;
330 *props = algo->desc.sadb_alg_id;
331
332 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
333 if (!p)
334 return -ENOMEM;
335
336 strcpy(p->alg_name, algo->name);
337 if (!p->alg_trunc_len)
338 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
339
340 *algpp = p;
341 return 0;
342}
343
Herbert Xu1a6509d2008-01-28 19:37:29 -0800344static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
345 struct nlattr *rta)
346{
347 struct xfrm_algo_aead *p, *ualg;
348 struct xfrm_algo_desc *algo;
349
350 if (!rta)
351 return 0;
352
353 ualg = nla_data(rta);
354
355 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
356 if (!algo)
357 return -ENOSYS;
358 *props = algo->desc.sadb_alg_id;
359
360 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
361 if (!p)
362 return -ENOMEM;
363
364 strcpy(p->alg_name, algo->name);
365 *algpp = p;
366 return 0;
367}
368
Steffen Klasserte2b19122011-03-28 19:47:30 +0000369static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
370 struct nlattr *rp)
371{
372 struct xfrm_replay_state_esn *up;
373
374 if (!replay_esn || !rp)
375 return 0;
376
377 up = nla_data(rp);
378
379 if (xfrm_replay_state_esn_len(replay_esn) !=
380 xfrm_replay_state_esn_len(up))
381 return -EINVAL;
382
383 return 0;
384}
385
Steffen Klassertd8647b72011-03-08 00:10:27 +0000386static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
387 struct xfrm_replay_state_esn **preplay_esn,
388 struct nlattr *rta)
389{
390 struct xfrm_replay_state_esn *p, *pp, *up;
391
392 if (!rta)
393 return 0;
394
395 up = nla_data(rta);
396
397 p = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL);
398 if (!p)
399 return -ENOMEM;
400
401 pp = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL);
402 if (!pp) {
403 kfree(p);
404 return -ENOMEM;
405 }
406
407 *replay_esn = p;
408 *preplay_esn = pp;
409
410 return 0;
411}
412
Joy Latten661697f2007-04-13 16:14:35 -0700413static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
Trent Jaegerdf718372005-12-13 23:12:27 -0800414{
Trent Jaegerdf718372005-12-13 23:12:27 -0800415 int len = 0;
416
417 if (xfrm_ctx) {
418 len += sizeof(struct xfrm_user_sec_ctx);
419 len += xfrm_ctx->ctx_len;
420 }
421 return len;
422}
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
425{
426 memcpy(&x->id, &p->id, sizeof(x->id));
427 memcpy(&x->sel, &p->sel, sizeof(x->sel));
428 memcpy(&x->lft, &p->lft, sizeof(x->lft));
429 x->props.mode = p->mode;
430 x->props.replay_window = p->replay_window;
431 x->props.reqid = p->reqid;
432 x->props.family = p->family;
David S. Miller54489c142006-10-27 15:29:47 -0700433 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 x->props.flags = p->flags;
Herbert Xu196b0032007-07-31 02:04:32 -0700435
Steffen Klassertccf9b3b2008-07-10 16:55:37 -0700436 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
Herbert Xu196b0032007-07-31 02:04:32 -0700437 x->sel.family = p->family;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438}
439
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800440/*
441 * someday when pfkey also has support, we could have the code
442 * somehow made shareable and move it to xfrm_state.c - JHS
443 *
444*/
Thomas Graf5424f322007-08-22 14:01:33 -0700445static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800446{
Thomas Graf5424f322007-08-22 14:01:33 -0700447 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
Steffen Klassertd8647b72011-03-08 00:10:27 +0000448 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
Thomas Graf5424f322007-08-22 14:01:33 -0700449 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
450 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
451 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800452
Steffen Klassertd8647b72011-03-08 00:10:27 +0000453 if (re) {
454 struct xfrm_replay_state_esn *replay_esn;
455 replay_esn = nla_data(re);
456 memcpy(x->replay_esn, replay_esn,
457 xfrm_replay_state_esn_len(replay_esn));
458 memcpy(x->preplay_esn, replay_esn,
459 xfrm_replay_state_esn_len(replay_esn));
460 }
461
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800462 if (rp) {
463 struct xfrm_replay_state *replay;
Thomas Graf5424f322007-08-22 14:01:33 -0700464 replay = nla_data(rp);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800465 memcpy(&x->replay, replay, sizeof(*replay));
466 memcpy(&x->preplay, replay, sizeof(*replay));
467 }
468
469 if (lt) {
470 struct xfrm_lifetime_cur *ltime;
Thomas Graf5424f322007-08-22 14:01:33 -0700471 ltime = nla_data(lt);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800472 x->curlft.bytes = ltime->bytes;
473 x->curlft.packets = ltime->packets;
474 x->curlft.add_time = ltime->add_time;
475 x->curlft.use_time = ltime->use_time;
476 }
477
Thomas Grafcf5cb792007-08-22 13:59:04 -0700478 if (et)
Thomas Graf5424f322007-08-22 14:01:33 -0700479 x->replay_maxage = nla_get_u32(et);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800480
Thomas Grafcf5cb792007-08-22 13:59:04 -0700481 if (rt)
Thomas Graf5424f322007-08-22 14:01:33 -0700482 x->replay_maxdiff = nla_get_u32(rt);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800483}
484
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800485static struct xfrm_state *xfrm_state_construct(struct net *net,
486 struct xfrm_usersa_info *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700487 struct nlattr **attrs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 int *errp)
489{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800490 struct xfrm_state *x = xfrm_state_alloc(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 int err = -ENOMEM;
492
493 if (!x)
494 goto error_no_put;
495
496 copy_from_user_state(x, p);
497
Herbert Xu1a6509d2008-01-28 19:37:29 -0800498 if ((err = attach_aead(&x->aead, &x->props.ealgo,
499 attrs[XFRMA_ALG_AEAD])))
500 goto error;
Martin Willi4447bb32009-11-25 00:29:52 +0000501 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
502 attrs[XFRMA_ALG_AUTH_TRUNC])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 goto error;
Martin Willi4447bb32009-11-25 00:29:52 +0000504 if (!x->props.aalgo) {
505 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
506 attrs[XFRMA_ALG_AUTH])))
507 goto error;
508 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
510 xfrm_ealg_get_byname,
Thomas Graf35a7aa02007-08-22 14:00:40 -0700511 attrs[XFRMA_ALG_CRYPT])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 goto error;
513 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
514 xfrm_calg_get_byname,
Thomas Graf35a7aa02007-08-22 14:00:40 -0700515 attrs[XFRMA_ALG_COMP])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 goto error;
Thomas Graffd211502007-09-06 03:28:08 -0700517
518 if (attrs[XFRMA_ENCAP]) {
519 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
520 sizeof(*x->encap), GFP_KERNEL);
521 if (x->encap == NULL)
522 goto error;
523 }
524
Martin Willi35d28562010-12-08 04:37:49 +0000525 if (attrs[XFRMA_TFCPAD])
526 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
527
Thomas Graffd211502007-09-06 03:28:08 -0700528 if (attrs[XFRMA_COADDR]) {
529 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
530 sizeof(*x->coaddr), GFP_KERNEL);
531 if (x->coaddr == NULL)
532 goto error;
533 }
534
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000535 xfrm_mark_get(attrs, &x->mark);
536
Wei Yongjuna454f0c2011-03-21 18:08:28 -0700537 err = __xfrm_init_state(x, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 if (err)
539 goto error;
540
Thomas Graffd211502007-09-06 03:28:08 -0700541 if (attrs[XFRMA_SEC_CTX] &&
542 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
Trent Jaegerdf718372005-12-13 23:12:27 -0800543 goto error;
544
Steffen Klassertd8647b72011-03-08 00:10:27 +0000545 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
546 attrs[XFRMA_REPLAY_ESN_VAL])))
547 goto error;
548
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 x->km.seq = p->seq;
Alexey Dobriyanb27aead2008-11-25 18:00:48 -0800550 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800551 /* sysctl_xfrm_aevent_etime is in 100ms units */
Alexey Dobriyanb27aead2008-11-25 18:00:48 -0800552 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800553
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000554 if ((err = xfrm_init_replay(x)))
555 goto error;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800556
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000557 /* override default values from above */
Thomas Graf5424f322007-08-22 14:01:33 -0700558 xfrm_update_ae_params(x, attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
560 return x;
561
562error:
563 x->km.state = XFRM_STATE_DEAD;
564 xfrm_state_put(x);
565error_no_put:
566 *errp = err;
567 return NULL;
568}
569
Christoph Hellwig22e70052007-01-02 15:22:30 -0800570static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700571 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800573 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -0700574 struct xfrm_usersa_info *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 struct xfrm_state *x;
576 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700577 struct km_event c;
Patrick McHardyc53fa1e2011-03-03 10:55:40 -0800578 uid_t loginuid = audit_get_loginuid(current);
579 u32 sessionid = audit_get_sessionid(current);
580 u32 sid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
Thomas Graf35a7aa02007-08-22 14:00:40 -0700582 err = verify_newsa_info(p, attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (err)
584 return err;
585
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800586 x = xfrm_state_construct(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 if (!x)
588 return err;
589
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700590 xfrm_state_hold(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
592 err = xfrm_state_add(x);
593 else
594 err = xfrm_state_update(x);
595
Patrick McHardyc53fa1e2011-03-03 10:55:40 -0800596 security_task_getsecid(current, &sid);
Eric Paris25323862008-04-18 10:09:25 -0400597 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -0600598
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 if (err < 0) {
600 x->km.state = XFRM_STATE_DEAD;
Herbert Xu21380b82006-02-22 14:47:13 -0800601 __xfrm_state_put(x);
Patrick McHardy7d6dfe12005-06-18 22:45:31 -0700602 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 }
604
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700605 c.seq = nlh->nlmsg_seq;
606 c.pid = nlh->nlmsg_pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -0700607 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700608
609 km_state_notify(x, &c);
Patrick McHardy7d6dfe12005-06-18 22:45:31 -0700610out:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700611 xfrm_state_put(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 return err;
613}
614
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800615static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
616 struct xfrm_usersa_id *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700617 struct nlattr **attrs,
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700618 int *errp)
619{
620 struct xfrm_state *x = NULL;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000621 struct xfrm_mark m;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700622 int err;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000623 u32 mark = xfrm_mark_get(attrs, &m);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700624
625 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
626 err = -ESRCH;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000627 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700628 } else {
629 xfrm_address_t *saddr = NULL;
630
Thomas Graf35a7aa02007-08-22 14:00:40 -0700631 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700632 if (!saddr) {
633 err = -EINVAL;
634 goto out;
635 }
636
Masahide NAKAMURA9abbffe2006-11-24 20:34:51 -0800637 err = -ESRCH;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000638 x = xfrm_state_lookup_byaddr(net, mark,
639 &p->daddr, saddr,
Alexey Dobriyan221df1e2008-11-25 17:30:50 -0800640 p->proto, p->family);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700641 }
642
643 out:
644 if (!x && errp)
645 *errp = err;
646 return x;
647}
648
Christoph Hellwig22e70052007-01-02 15:22:30 -0800649static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700650 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800652 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 struct xfrm_state *x;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700654 int err = -ESRCH;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700655 struct km_event c;
Thomas Graf7b67c852007-08-22 13:53:52 -0700656 struct xfrm_usersa_id *p = nlmsg_data(nlh);
Patrick McHardyc53fa1e2011-03-03 10:55:40 -0800657 uid_t loginuid = audit_get_loginuid(current);
658 u32 sessionid = audit_get_sessionid(current);
659 u32 sid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800661 x = xfrm_user_state_lookup(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 if (x == NULL)
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700663 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
David S. Miller6f68dc32006-06-08 23:58:52 -0700665 if ((err = security_xfrm_state_delete(x)) != 0)
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700666 goto out;
667
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 if (xfrm_state_kern(x)) {
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700669 err = -EPERM;
670 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 }
672
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700673 err = xfrm_state_delete(x);
Joy Latten161a09e2006-11-27 13:11:54 -0600674
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700675 if (err < 0)
676 goto out;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700677
678 c.seq = nlh->nlmsg_seq;
679 c.pid = nlh->nlmsg_pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -0700680 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700681 km_state_notify(x, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700683out:
Patrick McHardyc53fa1e2011-03-03 10:55:40 -0800684 security_task_getsecid(current, &sid);
Eric Paris25323862008-04-18 10:09:25 -0400685 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700686 xfrm_state_put(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700687 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688}
689
690static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
691{
692 memcpy(&p->id, &x->id, sizeof(p->id));
693 memcpy(&p->sel, &x->sel, sizeof(p->sel));
694 memcpy(&p->lft, &x->lft, sizeof(p->lft));
695 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
696 memcpy(&p->stats, &x->stats, sizeof(p->stats));
David S. Miller54489c142006-10-27 15:29:47 -0700697 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 p->mode = x->props.mode;
699 p->replay_window = x->props.replay_window;
700 p->reqid = x->props.reqid;
701 p->family = x->props.family;
702 p->flags = x->props.flags;
703 p->seq = x->km.seq;
704}
705
706struct xfrm_dump_info {
707 struct sk_buff *in_skb;
708 struct sk_buff *out_skb;
709 u32 nlmsg_seq;
710 u16 nlmsg_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711};
712
Thomas Grafc0144be2007-08-22 13:55:43 -0700713static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
714{
Thomas Grafc0144be2007-08-22 13:55:43 -0700715 struct xfrm_user_sec_ctx *uctx;
716 struct nlattr *attr;
Herbert Xu68325d32007-10-09 13:30:57 -0700717 int ctx_size = sizeof(*uctx) + s->ctx_len;
Thomas Grafc0144be2007-08-22 13:55:43 -0700718
719 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
720 if (attr == NULL)
721 return -EMSGSIZE;
722
723 uctx = nla_data(attr);
724 uctx->exttype = XFRMA_SEC_CTX;
725 uctx->len = ctx_size;
726 uctx->ctx_doi = s->ctx_doi;
727 uctx->ctx_alg = s->ctx_alg;
728 uctx->ctx_len = s->ctx_len;
729 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
730
731 return 0;
732}
733
Martin Willi4447bb32009-11-25 00:29:52 +0000734static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
735{
736 struct xfrm_algo *algo;
737 struct nlattr *nla;
738
739 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
740 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
741 if (!nla)
742 return -EMSGSIZE;
743
744 algo = nla_data(nla);
745 strcpy(algo->alg_name, auth->alg_name);
746 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
747 algo->alg_key_len = auth->alg_key_len;
748
749 return 0;
750}
751
Herbert Xu68325d32007-10-09 13:30:57 -0700752/* Don't change this without updating xfrm_sa_len! */
753static int copy_to_user_state_extra(struct xfrm_state *x,
754 struct xfrm_usersa_info *p,
755 struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 copy_to_user_state(x, p);
758
Herbert Xu050f0092007-10-09 13:31:47 -0700759 if (x->coaddr)
760 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
761
762 if (x->lastused)
763 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
Herbert Xu050f0092007-10-09 13:31:47 -0700764
Herbert Xu1a6509d2008-01-28 19:37:29 -0800765 if (x->aead)
766 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
Martin Willi4447bb32009-11-25 00:29:52 +0000767 if (x->aalg) {
768 if (copy_to_user_auth(x->aalg, skb))
769 goto nla_put_failure;
770
771 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
772 xfrm_alg_auth_len(x->aalg), x->aalg);
773 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 if (x->ealg)
Eric Dumazet0f99be02008-01-08 23:39:06 -0800775 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 if (x->calg)
Thomas Grafc0144be2007-08-22 13:55:43 -0700777 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778
779 if (x->encap)
Thomas Grafc0144be2007-08-22 13:55:43 -0700780 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781
Martin Willi35d28562010-12-08 04:37:49 +0000782 if (x->tfcpad)
783 NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad);
784
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000785 if (xfrm_mark_put(skb, &x->mark))
786 goto nla_put_failure;
787
Steffen Klassertd8647b72011-03-08 00:10:27 +0000788 if (x->replay_esn)
789 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
790 xfrm_replay_state_esn_len(x->replay_esn), x->replay_esn);
791
Thomas Grafc0144be2007-08-22 13:55:43 -0700792 if (x->security && copy_sec_ctx(x->security, skb) < 0)
793 goto nla_put_failure;
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700794
Herbert Xu68325d32007-10-09 13:30:57 -0700795 return 0;
796
797nla_put_failure:
798 return -EMSGSIZE;
799}
800
801static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
802{
803 struct xfrm_dump_info *sp = ptr;
804 struct sk_buff *in_skb = sp->in_skb;
805 struct sk_buff *skb = sp->out_skb;
806 struct xfrm_usersa_info *p;
807 struct nlmsghdr *nlh;
808 int err;
809
Herbert Xu68325d32007-10-09 13:30:57 -0700810 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
811 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
812 if (nlh == NULL)
813 return -EMSGSIZE;
814
815 p = nlmsg_data(nlh);
816
817 err = copy_to_user_state_extra(x, p, skb);
818 if (err)
819 goto nla_put_failure;
820
Thomas Graf98250692007-08-22 12:47:26 -0700821 nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 return 0;
823
Thomas Grafc0144be2007-08-22 13:55:43 -0700824nla_put_failure:
Thomas Graf98250692007-08-22 12:47:26 -0700825 nlmsg_cancel(skb, nlh);
Herbert Xu68325d32007-10-09 13:30:57 -0700826 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827}
828
Timo Teras4c563f72008-02-28 21:31:08 -0800829static int xfrm_dump_sa_done(struct netlink_callback *cb)
830{
831 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
832 xfrm_state_walk_done(walk);
833 return 0;
834}
835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
837{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800838 struct net *net = sock_net(skb->sk);
Timo Teras4c563f72008-02-28 21:31:08 -0800839 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 struct xfrm_dump_info info;
841
Timo Teras4c563f72008-02-28 21:31:08 -0800842 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
843 sizeof(cb->args) - sizeof(cb->args[0]));
844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 info.in_skb = cb->skb;
846 info.out_skb = skb;
847 info.nlmsg_seq = cb->nlh->nlmsg_seq;
848 info.nlmsg_flags = NLM_F_MULTI;
Timo Teras4c563f72008-02-28 21:31:08 -0800849
850 if (!cb->args[0]) {
851 cb->args[0] = 1;
852 xfrm_state_walk_init(walk, 0);
853 }
854
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800855 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
857 return skb->len;
858}
859
860static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
861 struct xfrm_state *x, u32 seq)
862{
863 struct xfrm_dump_info info;
864 struct sk_buff *skb;
865
Thomas Graf7deb2262007-08-22 13:57:39 -0700866 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 if (!skb)
868 return ERR_PTR(-ENOMEM);
869
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 info.in_skb = in_skb;
871 info.out_skb = skb;
872 info.nlmsg_seq = seq;
873 info.nlmsg_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
875 if (dump_one_state(x, 0, &info)) {
876 kfree_skb(skb);
877 return NULL;
878 }
879
880 return skb;
881}
882
Thomas Graf7deb2262007-08-22 13:57:39 -0700883static inline size_t xfrm_spdinfo_msgsize(void)
884{
885 return NLMSG_ALIGN(4)
886 + nla_total_size(sizeof(struct xfrmu_spdinfo))
887 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
888}
889
Alexey Dobriyane0710412010-01-23 13:37:10 +0000890static int build_spdinfo(struct sk_buff *skb, struct net *net,
891 u32 pid, u32 seq, u32 flags)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700892{
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -0700893 struct xfrmk_spdinfo si;
894 struct xfrmu_spdinfo spc;
895 struct xfrmu_spdhinfo sph;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700896 struct nlmsghdr *nlh;
897 u32 *f;
898
899 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300900 if (nlh == NULL) /* shouldn't really happen ... */
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700901 return -EMSGSIZE;
902
903 f = nlmsg_data(nlh);
904 *f = flags;
Alexey Dobriyane0710412010-01-23 13:37:10 +0000905 xfrm_spd_getinfo(net, &si);
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -0700906 spc.incnt = si.incnt;
907 spc.outcnt = si.outcnt;
908 spc.fwdcnt = si.fwdcnt;
909 spc.inscnt = si.inscnt;
910 spc.outscnt = si.outscnt;
911 spc.fwdscnt = si.fwdscnt;
912 sph.spdhcnt = si.spdhcnt;
913 sph.spdhmcnt = si.spdhmcnt;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700914
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -0700915 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
916 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700917
918 return nlmsg_end(skb, nlh);
919
920nla_put_failure:
921 nlmsg_cancel(skb, nlh);
922 return -EMSGSIZE;
923}
924
925static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700926 struct nlattr **attrs)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700927{
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800928 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700929 struct sk_buff *r_skb;
Thomas Graf7b67c852007-08-22 13:53:52 -0700930 u32 *flags = nlmsg_data(nlh);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700931 u32 spid = NETLINK_CB(skb).pid;
932 u32 seq = nlh->nlmsg_seq;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700933
Thomas Graf7deb2262007-08-22 13:57:39 -0700934 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700935 if (r_skb == NULL)
936 return -ENOMEM;
937
Alexey Dobriyane0710412010-01-23 13:37:10 +0000938 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700939 BUG();
940
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800941 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700942}
943
Thomas Graf7deb2262007-08-22 13:57:39 -0700944static inline size_t xfrm_sadinfo_msgsize(void)
945{
946 return NLMSG_ALIGN(4)
947 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
948 + nla_total_size(4); /* XFRMA_SAD_CNT */
949}
950
Alexey Dobriyane0710412010-01-23 13:37:10 +0000951static int build_sadinfo(struct sk_buff *skb, struct net *net,
952 u32 pid, u32 seq, u32 flags)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700953{
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -0700954 struct xfrmk_sadinfo si;
955 struct xfrmu_sadhinfo sh;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700956 struct nlmsghdr *nlh;
957 u32 *f;
958
959 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300960 if (nlh == NULL) /* shouldn't really happen ... */
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700961 return -EMSGSIZE;
962
963 f = nlmsg_data(nlh);
964 *f = flags;
Alexey Dobriyane0710412010-01-23 13:37:10 +0000965 xfrm_sad_getinfo(net, &si);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700966
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -0700967 sh.sadhmcnt = si.sadhmcnt;
968 sh.sadhcnt = si.sadhcnt;
969
970 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
971 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700972
973 return nlmsg_end(skb, nlh);
974
975nla_put_failure:
976 nlmsg_cancel(skb, nlh);
977 return -EMSGSIZE;
978}
979
980static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700981 struct nlattr **attrs)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700982{
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800983 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700984 struct sk_buff *r_skb;
Thomas Graf7b67c852007-08-22 13:53:52 -0700985 u32 *flags = nlmsg_data(nlh);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700986 u32 spid = NETLINK_CB(skb).pid;
987 u32 seq = nlh->nlmsg_seq;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700988
Thomas Graf7deb2262007-08-22 13:57:39 -0700989 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700990 if (r_skb == NULL)
991 return -ENOMEM;
992
Alexey Dobriyane0710412010-01-23 13:37:10 +0000993 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700994 BUG();
995
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800996 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700997}
998
Christoph Hellwig22e70052007-01-02 15:22:30 -0800999static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001000 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001002 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -07001003 struct xfrm_usersa_id *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 struct xfrm_state *x;
1005 struct sk_buff *resp_skb;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001006 int err = -ESRCH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001008 x = xfrm_user_state_lookup(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 if (x == NULL)
1010 goto out_noput;
1011
1012 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1013 if (IS_ERR(resp_skb)) {
1014 err = PTR_ERR(resp_skb);
1015 } else {
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001016 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 }
1018 xfrm_state_put(x);
1019out_noput:
1020 return err;
1021}
1022
1023static int verify_userspi_info(struct xfrm_userspi_info *p)
1024{
1025 switch (p->info.id.proto) {
1026 case IPPROTO_AH:
1027 case IPPROTO_ESP:
1028 break;
1029
1030 case IPPROTO_COMP:
1031 /* IPCOMP spi is 16-bits. */
1032 if (p->max >= 0x10000)
1033 return -EINVAL;
1034 break;
1035
1036 default:
1037 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001038 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039
1040 if (p->min > p->max)
1041 return -EINVAL;
1042
1043 return 0;
1044}
1045
Christoph Hellwig22e70052007-01-02 15:22:30 -08001046static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001047 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001049 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 struct xfrm_state *x;
1051 struct xfrm_userspi_info *p;
1052 struct sk_buff *resp_skb;
1053 xfrm_address_t *daddr;
1054 int family;
1055 int err;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001056 u32 mark;
1057 struct xfrm_mark m;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058
Thomas Graf7b67c852007-08-22 13:53:52 -07001059 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 err = verify_userspi_info(p);
1061 if (err)
1062 goto out_noput;
1063
1064 family = p->info.family;
1065 daddr = &p->info.id.daddr;
1066
1067 x = NULL;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001068
1069 mark = xfrm_mark_get(attrs, &m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 if (p->info.seq) {
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001071 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
1073 xfrm_state_put(x);
1074 x = NULL;
1075 }
1076 }
1077
1078 if (!x)
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001079 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 p->info.id.proto, daddr,
1081 &p->info.saddr, 1,
1082 family);
1083 err = -ENOENT;
1084 if (x == NULL)
1085 goto out_noput;
1086
Herbert Xu658b2192007-10-09 13:29:52 -07001087 err = xfrm_alloc_spi(x, p->min, p->max);
1088 if (err)
1089 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090
Herbert Xu658b2192007-10-09 13:29:52 -07001091 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 if (IS_ERR(resp_skb)) {
1093 err = PTR_ERR(resp_skb);
1094 goto out;
1095 }
1096
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001097 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
1099out:
1100 xfrm_state_put(x);
1101out_noput:
1102 return err;
1103}
1104
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001105static int verify_policy_dir(u8 dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106{
1107 switch (dir) {
1108 case XFRM_POLICY_IN:
1109 case XFRM_POLICY_OUT:
1110 case XFRM_POLICY_FWD:
1111 break;
1112
1113 default:
1114 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001115 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
1117 return 0;
1118}
1119
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001120static int verify_policy_type(u8 type)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001121{
1122 switch (type) {
1123 case XFRM_POLICY_TYPE_MAIN:
1124#ifdef CONFIG_XFRM_SUB_POLICY
1125 case XFRM_POLICY_TYPE_SUB:
1126#endif
1127 break;
1128
1129 default:
1130 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001131 }
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001132
1133 return 0;
1134}
1135
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1137{
1138 switch (p->share) {
1139 case XFRM_SHARE_ANY:
1140 case XFRM_SHARE_SESSION:
1141 case XFRM_SHARE_USER:
1142 case XFRM_SHARE_UNIQUE:
1143 break;
1144
1145 default:
1146 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001147 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148
1149 switch (p->action) {
1150 case XFRM_POLICY_ALLOW:
1151 case XFRM_POLICY_BLOCK:
1152 break;
1153
1154 default:
1155 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001156 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157
1158 switch (p->sel.family) {
1159 case AF_INET:
1160 break;
1161
1162 case AF_INET6:
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001163#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 break;
1165#else
1166 return -EAFNOSUPPORT;
1167#endif
1168
1169 default:
1170 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001171 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
1173 return verify_policy_dir(p->dir);
1174}
1175
Thomas Graf5424f322007-08-22 14:01:33 -07001176static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
Trent Jaegerdf718372005-12-13 23:12:27 -08001177{
Thomas Graf5424f322007-08-22 14:01:33 -07001178 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Trent Jaegerdf718372005-12-13 23:12:27 -08001179 struct xfrm_user_sec_ctx *uctx;
1180
1181 if (!rt)
1182 return 0;
1183
Thomas Graf5424f322007-08-22 14:01:33 -07001184 uctx = nla_data(rt);
Paul Moore03e1ad72008-04-12 19:07:52 -07001185 return security_xfrm_policy_alloc(&pol->security, uctx);
Trent Jaegerdf718372005-12-13 23:12:27 -08001186}
1187
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1189 int nr)
1190{
1191 int i;
1192
1193 xp->xfrm_nr = nr;
1194 for (i = 0; i < nr; i++, ut++) {
1195 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1196
1197 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1198 memcpy(&t->saddr, &ut->saddr,
1199 sizeof(xfrm_address_t));
1200 t->reqid = ut->reqid;
1201 t->mode = ut->mode;
1202 t->share = ut->share;
1203 t->optional = ut->optional;
1204 t->aalgos = ut->aalgos;
1205 t->ealgos = ut->ealgos;
1206 t->calgos = ut->calgos;
Herbert Xuc5d18e92008-04-22 00:46:42 -07001207 /* If all masks are ~0, then we allow all algorithms. */
1208 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
Miika Komu8511d012006-11-30 16:40:51 -08001209 t->encap_family = ut->family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 }
1211}
1212
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001213static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1214{
1215 int i;
1216
1217 if (nr > XFRM_MAX_DEPTH)
1218 return -EINVAL;
1219
1220 for (i = 0; i < nr; i++) {
1221 /* We never validated the ut->family value, so many
1222 * applications simply leave it at zero. The check was
1223 * never made and ut->family was ignored because all
1224 * templates could be assumed to have the same family as
1225 * the policy itself. Now that we will have ipv4-in-ipv6
1226 * and ipv6-in-ipv4 tunnels, this is no longer true.
1227 */
1228 if (!ut[i].family)
1229 ut[i].family = family;
1230
1231 switch (ut[i].family) {
1232 case AF_INET:
1233 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001234#if IS_ENABLED(CONFIG_IPV6)
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001235 case AF_INET6:
1236 break;
1237#endif
1238 default:
1239 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001240 }
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001241 }
1242
1243 return 0;
1244}
1245
Thomas Graf5424f322007-08-22 14:01:33 -07001246static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247{
Thomas Graf5424f322007-08-22 14:01:33 -07001248 struct nlattr *rt = attrs[XFRMA_TMPL];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
1250 if (!rt) {
1251 pol->xfrm_nr = 0;
1252 } else {
Thomas Graf5424f322007-08-22 14:01:33 -07001253 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1254 int nr = nla_len(rt) / sizeof(*utmpl);
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001255 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001257 err = validate_tmpl(nr, utmpl, pol->family);
1258 if (err)
1259 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
Thomas Graf5424f322007-08-22 14:01:33 -07001261 copy_templates(pol, utmpl, nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 }
1263 return 0;
1264}
1265
Thomas Graf5424f322007-08-22 14:01:33 -07001266static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001267{
Thomas Graf5424f322007-08-22 14:01:33 -07001268 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001269 struct xfrm_userpolicy_type *upt;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001270 u8 type = XFRM_POLICY_TYPE_MAIN;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001271 int err;
1272
1273 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001274 upt = nla_data(rt);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001275 type = upt->type;
1276 }
1277
1278 err = verify_policy_type(type);
1279 if (err)
1280 return err;
1281
1282 *tp = type;
1283 return 0;
1284}
1285
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1287{
1288 xp->priority = p->priority;
1289 xp->index = p->index;
1290 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1291 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1292 xp->action = p->action;
1293 xp->flags = p->flags;
1294 xp->family = p->sel.family;
1295 /* XXX xp->share = p->share; */
1296}
1297
1298static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1299{
1300 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1301 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1302 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1303 p->priority = xp->priority;
1304 p->index = xp->index;
1305 p->sel.family = xp->family;
1306 p->dir = dir;
1307 p->action = xp->action;
1308 p->flags = xp->flags;
1309 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1310}
1311
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001312static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001314 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 int err;
1316
1317 if (!xp) {
1318 *errp = -ENOMEM;
1319 return NULL;
1320 }
1321
1322 copy_from_user_policy(xp, p);
Trent Jaegerdf718372005-12-13 23:12:27 -08001323
Thomas Graf35a7aa02007-08-22 14:00:40 -07001324 err = copy_from_user_policy_type(&xp->type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001325 if (err)
1326 goto error;
1327
Thomas Graf35a7aa02007-08-22 14:00:40 -07001328 if (!(err = copy_from_user_tmpl(xp, attrs)))
1329 err = copy_from_user_sec_ctx(xp, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001330 if (err)
1331 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001333 xfrm_mark_get(attrs, &xp->mark);
1334
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 return xp;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001336 error:
1337 *errp = err;
Herbert Xu12a169e2008-10-01 07:03:24 -07001338 xp->walk.dead = 1;
WANG Cong64c31b32008-01-07 22:34:29 -08001339 xfrm_policy_destroy(xp);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001340 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341}
1342
Christoph Hellwig22e70052007-01-02 15:22:30 -08001343static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001344 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001346 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -07001347 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 struct xfrm_policy *xp;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001349 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 int err;
1351 int excl;
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001352 uid_t loginuid = audit_get_loginuid(current);
1353 u32 sessionid = audit_get_sessionid(current);
1354 u32 sid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355
1356 err = verify_newpolicy_info(p);
1357 if (err)
1358 return err;
Thomas Graf35a7aa02007-08-22 14:00:40 -07001359 err = verify_sec_ctx_len(attrs);
Trent Jaegerdf718372005-12-13 23:12:27 -08001360 if (err)
1361 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001363 xp = xfrm_policy_construct(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 if (!xp)
1365 return err;
1366
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001367 /* shouldn't excl be based on nlh flags??
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001368 * Aha! this is anti-netlink really i.e more pfkey derived
1369 * in netlink excl is a flag and you wouldnt need
1370 * a type XFRM_MSG_UPDPOLICY - JHS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1372 err = xfrm_policy_insert(p->dir, xp, excl);
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001373 security_task_getsecid(current, &sid);
Eric Paris25323862008-04-18 10:09:25 -04001374 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -06001375
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376 if (err) {
Paul Moore03e1ad72008-04-12 19:07:52 -07001377 security_xfrm_policy_free(xp->security);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 kfree(xp);
1379 return err;
1380 }
1381
Herbert Xuf60f6b82005-06-18 22:44:37 -07001382 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001383 c.seq = nlh->nlmsg_seq;
1384 c.pid = nlh->nlmsg_pid;
1385 km_policy_notify(xp, p->dir, &c);
1386
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 xfrm_pol_put(xp);
1388
1389 return 0;
1390}
1391
1392static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1393{
1394 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1395 int i;
1396
1397 if (xp->xfrm_nr == 0)
1398 return 0;
1399
1400 for (i = 0; i < xp->xfrm_nr; i++) {
1401 struct xfrm_user_tmpl *up = &vec[i];
1402 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1403
1404 memcpy(&up->id, &kp->id, sizeof(up->id));
Miika Komu8511d012006-11-30 16:40:51 -08001405 up->family = kp->encap_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1407 up->reqid = kp->reqid;
1408 up->mode = kp->mode;
1409 up->share = kp->share;
1410 up->optional = kp->optional;
1411 up->aalgos = kp->aalgos;
1412 up->ealgos = kp->ealgos;
1413 up->calgos = kp->calgos;
1414 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
Thomas Grafc0144be2007-08-22 13:55:43 -07001416 return nla_put(skb, XFRMA_TMPL,
1417 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
Trent Jaegerdf718372005-12-13 23:12:27 -08001418}
1419
Serge Hallyn0d681622006-07-24 23:30:44 -07001420static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1421{
1422 if (x->security) {
1423 return copy_sec_ctx(x->security, skb);
1424 }
1425 return 0;
1426}
1427
1428static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1429{
1430 if (xp->security) {
1431 return copy_sec_ctx(xp->security, skb);
1432 }
1433 return 0;
1434}
Thomas Grafcfbfd452007-08-22 13:57:04 -07001435static inline size_t userpolicy_type_attrsize(void)
1436{
1437#ifdef CONFIG_XFRM_SUB_POLICY
1438 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1439#else
1440 return 0;
1441#endif
1442}
Serge Hallyn0d681622006-07-24 23:30:44 -07001443
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001444#ifdef CONFIG_XFRM_SUB_POLICY
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001445static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001446{
Thomas Grafc0144be2007-08-22 13:55:43 -07001447 struct xfrm_userpolicy_type upt = {
1448 .type = type,
1449 };
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001450
Thomas Grafc0144be2007-08-22 13:55:43 -07001451 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001452}
1453
1454#else
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001455static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001456{
1457 return 0;
1458}
1459#endif
1460
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1462{
1463 struct xfrm_dump_info *sp = ptr;
1464 struct xfrm_userpolicy_info *p;
1465 struct sk_buff *in_skb = sp->in_skb;
1466 struct sk_buff *skb = sp->out_skb;
1467 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468
Thomas Graf79b8b7f2007-08-22 12:46:53 -07001469 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1470 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1471 if (nlh == NULL)
1472 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473
Thomas Graf7b67c852007-08-22 13:53:52 -07001474 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 copy_to_user_policy(xp, p, dir);
1476 if (copy_to_user_tmpl(xp, skb) < 0)
1477 goto nlmsg_failure;
Trent Jaegerdf718372005-12-13 23:12:27 -08001478 if (copy_to_user_sec_ctx(xp, skb))
1479 goto nlmsg_failure;
Jamal Hadi Salim1459bb32006-11-20 16:51:22 -08001480 if (copy_to_user_policy_type(xp->type, skb) < 0)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001481 goto nlmsg_failure;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001482 if (xfrm_mark_put(skb, &xp->mark))
1483 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484
Thomas Graf98250692007-08-22 12:47:26 -07001485 nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 return 0;
1487
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001488nla_put_failure:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489nlmsg_failure:
Thomas Graf98250692007-08-22 12:47:26 -07001490 nlmsg_cancel(skb, nlh);
1491 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492}
1493
Timo Teras4c563f72008-02-28 21:31:08 -08001494static int xfrm_dump_policy_done(struct netlink_callback *cb)
1495{
1496 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1497
1498 xfrm_policy_walk_done(walk);
1499 return 0;
1500}
1501
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1503{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001504 struct net *net = sock_net(skb->sk);
Timo Teras4c563f72008-02-28 21:31:08 -08001505 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506 struct xfrm_dump_info info;
1507
Timo Teras4c563f72008-02-28 21:31:08 -08001508 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1509 sizeof(cb->args) - sizeof(cb->args[0]));
1510
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 info.in_skb = cb->skb;
1512 info.out_skb = skb;
1513 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1514 info.nlmsg_flags = NLM_F_MULTI;
Timo Teras4c563f72008-02-28 21:31:08 -08001515
1516 if (!cb->args[0]) {
1517 cb->args[0] = 1;
1518 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1519 }
1520
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001521 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522
1523 return skb->len;
1524}
1525
1526static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1527 struct xfrm_policy *xp,
1528 int dir, u32 seq)
1529{
1530 struct xfrm_dump_info info;
1531 struct sk_buff *skb;
1532
Thomas Graf7deb2262007-08-22 13:57:39 -07001533 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 if (!skb)
1535 return ERR_PTR(-ENOMEM);
1536
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537 info.in_skb = in_skb;
1538 info.out_skb = skb;
1539 info.nlmsg_seq = seq;
1540 info.nlmsg_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541
1542 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1543 kfree_skb(skb);
1544 return NULL;
1545 }
1546
1547 return skb;
1548}
1549
Christoph Hellwig22e70052007-01-02 15:22:30 -08001550static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001551 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001553 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 struct xfrm_policy *xp;
1555 struct xfrm_userpolicy_id *p;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001556 u8 type = XFRM_POLICY_TYPE_MAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001558 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559 int delete;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001560 struct xfrm_mark m;
1561 u32 mark = xfrm_mark_get(attrs, &m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562
Thomas Graf7b67c852007-08-22 13:53:52 -07001563 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1565
Thomas Graf35a7aa02007-08-22 14:00:40 -07001566 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001567 if (err)
1568 return err;
1569
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 err = verify_policy_dir(p->dir);
1571 if (err)
1572 return err;
1573
1574 if (p->index)
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001575 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
Trent Jaegerdf718372005-12-13 23:12:27 -08001576 else {
Thomas Graf5424f322007-08-22 14:01:33 -07001577 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Paul Moore03e1ad72008-04-12 19:07:52 -07001578 struct xfrm_sec_ctx *ctx;
Trent Jaegerdf718372005-12-13 23:12:27 -08001579
Thomas Graf35a7aa02007-08-22 14:00:40 -07001580 err = verify_sec_ctx_len(attrs);
Trent Jaegerdf718372005-12-13 23:12:27 -08001581 if (err)
1582 return err;
1583
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001584 ctx = NULL;
Trent Jaegerdf718372005-12-13 23:12:27 -08001585 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001586 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
Trent Jaegerdf718372005-12-13 23:12:27 -08001587
Paul Moore03e1ad72008-04-12 19:07:52 -07001588 err = security_xfrm_policy_alloc(&ctx, uctx);
1589 if (err)
Trent Jaegerdf718372005-12-13 23:12:27 -08001590 return err;
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001591 }
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001592 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001593 ctx, delete, &err);
Paul Moore03e1ad72008-04-12 19:07:52 -07001594 security_xfrm_policy_free(ctx);
Trent Jaegerdf718372005-12-13 23:12:27 -08001595 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596 if (xp == NULL)
1597 return -ENOENT;
1598
1599 if (!delete) {
1600 struct sk_buff *resp_skb;
1601
1602 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1603 if (IS_ERR(resp_skb)) {
1604 err = PTR_ERR(resp_skb);
1605 } else {
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001606 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
Thomas Graf082a1ad2007-08-22 13:54:36 -07001607 NETLINK_CB(skb).pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001609 } else {
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001610 uid_t loginuid = audit_get_loginuid(current);
1611 u32 sessionid = audit_get_sessionid(current);
1612 u32 sid;
Eric Paris25323862008-04-18 10:09:25 -04001613
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001614 security_task_getsecid(current, &sid);
Eric Paris25323862008-04-18 10:09:25 -04001615 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1616 sid);
David S. Miller13fcfbb02007-02-12 13:53:54 -08001617
1618 if (err != 0)
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001619 goto out;
David S. Miller13fcfbb02007-02-12 13:53:54 -08001620
Herbert Xue7443892005-06-18 22:44:18 -07001621 c.data.byid = p->index;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001622 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001623 c.seq = nlh->nlmsg_seq;
1624 c.pid = nlh->nlmsg_pid;
1625 km_policy_notify(xp, p->dir, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 }
1627
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001628out:
Eric Parisef41aaa2007-03-07 15:37:58 -08001629 xfrm_pol_put(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630 return err;
1631}
1632
Christoph Hellwig22e70052007-01-02 15:22:30 -08001633static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001634 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001636 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001637 struct km_event c;
Thomas Graf7b67c852007-08-22 13:53:52 -07001638 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
Joy Latten161a09e2006-11-27 13:11:54 -06001639 struct xfrm_audit audit_info;
Joy Latten4aa2e622007-06-04 19:05:57 -04001640 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001642 audit_info.loginuid = audit_get_loginuid(current);
1643 audit_info.sessionid = audit_get_sessionid(current);
1644 security_task_getsecid(current, &audit_info.secid);
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001645 err = xfrm_state_flush(net, p->proto, &audit_info);
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +00001646 if (err) {
1647 if (err == -ESRCH) /* empty table */
1648 return 0;
David S. Miller069c4742010-02-17 13:41:40 -08001649 return err;
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +00001650 }
Herbert Xubf088672005-06-18 22:44:00 -07001651 c.data.proto = p->proto;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001652 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001653 c.seq = nlh->nlmsg_seq;
1654 c.pid = nlh->nlmsg_pid;
Alexey Dobriyan70678022008-11-25 17:50:36 -08001655 c.net = net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001656 km_state_notify(NULL, &c);
1657
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658 return 0;
1659}
1660
Steffen Klassertd8647b72011-03-08 00:10:27 +00001661static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
Thomas Graf7deb2262007-08-22 13:57:39 -07001662{
Steffen Klassertd8647b72011-03-08 00:10:27 +00001663 size_t replay_size = x->replay_esn ?
1664 xfrm_replay_state_esn_len(x->replay_esn) :
1665 sizeof(struct xfrm_replay_state);
1666
Thomas Graf7deb2262007-08-22 13:57:39 -07001667 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
Steffen Klassertd8647b72011-03-08 00:10:27 +00001668 + nla_total_size(replay_size)
Thomas Graf7deb2262007-08-22 13:57:39 -07001669 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001670 + nla_total_size(sizeof(struct xfrm_mark))
Thomas Graf7deb2262007-08-22 13:57:39 -07001671 + nla_total_size(4) /* XFRM_AE_RTHR */
1672 + nla_total_size(4); /* XFRM_AE_ETHR */
1673}
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001674
David S. Miller214e0052011-02-24 00:02:38 -05001675static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001676{
1677 struct xfrm_aevent_id *id;
1678 struct nlmsghdr *nlh;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001679
Thomas Graf79b8b7f2007-08-22 12:46:53 -07001680 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1681 if (nlh == NULL)
1682 return -EMSGSIZE;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001683
Thomas Graf7b67c852007-08-22 13:53:52 -07001684 id = nlmsg_data(nlh);
Jamal Hadi Salim2b5f6dc2006-12-02 22:22:25 -08001685 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001686 id->sa_id.spi = x->id.spi;
1687 id->sa_id.family = x->props.family;
1688 id->sa_id.proto = x->id.proto;
Jamal Hadi Salim2b5f6dc2006-12-02 22:22:25 -08001689 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1690 id->reqid = x->props.reqid;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001691 id->flags = c->data.aevent;
1692
Steffen Klassertd8647b72011-03-08 00:10:27 +00001693 if (x->replay_esn)
1694 NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL,
1695 xfrm_replay_state_esn_len(x->replay_esn),
1696 x->replay_esn);
1697 else
1698 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1699
Thomas Grafc0144be2007-08-22 13:55:43 -07001700 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001701
Thomas Grafc0144be2007-08-22 13:55:43 -07001702 if (id->flags & XFRM_AE_RTHR)
1703 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001704
Thomas Grafc0144be2007-08-22 13:55:43 -07001705 if (id->flags & XFRM_AE_ETHR)
1706 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1707 x->replay_maxage * 10 / HZ);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001708
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001709 if (xfrm_mark_put(skb, &x->mark))
1710 goto nla_put_failure;
1711
Thomas Graf98250692007-08-22 12:47:26 -07001712 return nlmsg_end(skb, nlh);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001713
Thomas Grafc0144be2007-08-22 13:55:43 -07001714nla_put_failure:
Thomas Graf98250692007-08-22 12:47:26 -07001715 nlmsg_cancel(skb, nlh);
1716 return -EMSGSIZE;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001717}
1718
Christoph Hellwig22e70052007-01-02 15:22:30 -08001719static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001720 struct nlattr **attrs)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001721{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001722 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001723 struct xfrm_state *x;
1724 struct sk_buff *r_skb;
1725 int err;
1726 struct km_event c;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001727 u32 mark;
1728 struct xfrm_mark m;
Thomas Graf7b67c852007-08-22 13:53:52 -07001729 struct xfrm_aevent_id *p = nlmsg_data(nlh);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001730 struct xfrm_usersa_id *id = &p->sa_id;
1731
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001732 mark = xfrm_mark_get(attrs, &m);
1733
1734 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
Steffen Klassertd8647b72011-03-08 00:10:27 +00001735 if (x == NULL)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001736 return -ESRCH;
Steffen Klassertd8647b72011-03-08 00:10:27 +00001737
1738 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1739 if (r_skb == NULL) {
1740 xfrm_state_put(x);
1741 return -ENOMEM;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001742 }
1743
1744 /*
1745 * XXX: is this lock really needed - none of the other
1746 * gets lock (the concern is things getting updated
1747 * while we are still reading) - jhs
1748 */
1749 spin_lock_bh(&x->lock);
1750 c.data.aevent = p->flags;
1751 c.seq = nlh->nlmsg_seq;
1752 c.pid = nlh->nlmsg_pid;
1753
1754 if (build_aevent(r_skb, x, &c) < 0)
1755 BUG();
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001756 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001757 spin_unlock_bh(&x->lock);
1758 xfrm_state_put(x);
1759 return err;
1760}
1761
Christoph Hellwig22e70052007-01-02 15:22:30 -08001762static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001763 struct nlattr **attrs)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001764{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001765 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001766 struct xfrm_state *x;
1767 struct km_event c;
1768 int err = - EINVAL;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001769 u32 mark = 0;
1770 struct xfrm_mark m;
Thomas Graf7b67c852007-08-22 13:53:52 -07001771 struct xfrm_aevent_id *p = nlmsg_data(nlh);
Thomas Graf5424f322007-08-22 14:01:33 -07001772 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
Steffen Klassertd8647b72011-03-08 00:10:27 +00001773 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
Thomas Graf5424f322007-08-22 14:01:33 -07001774 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001775
Steffen Klassertd8647b72011-03-08 00:10:27 +00001776 if (!lt && !rp && !re)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001777 return err;
1778
1779 /* pedantic mode - thou shalt sayeth replaceth */
1780 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1781 return err;
1782
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001783 mark = xfrm_mark_get(attrs, &m);
1784
1785 x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001786 if (x == NULL)
1787 return -ESRCH;
1788
1789 if (x->km.state != XFRM_STATE_VALID)
1790 goto out;
1791
Steffen Klasserte2b19122011-03-28 19:47:30 +00001792 err = xfrm_replay_verify_len(x->replay_esn, rp);
1793 if (err)
1794 goto out;
1795
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001796 spin_lock_bh(&x->lock);
Thomas Graf35a7aa02007-08-22 14:00:40 -07001797 xfrm_update_ae_params(x, attrs);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001798 spin_unlock_bh(&x->lock);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001799
1800 c.event = nlh->nlmsg_type;
1801 c.seq = nlh->nlmsg_seq;
1802 c.pid = nlh->nlmsg_pid;
1803 c.data.aevent = XFRM_AE_CU;
1804 km_state_notify(x, &c);
1805 err = 0;
1806out:
1807 xfrm_state_put(x);
1808 return err;
1809}
1810
Christoph Hellwig22e70052007-01-02 15:22:30 -08001811static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001812 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001814 struct net *net = sock_net(skb->sk);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001815 struct km_event c;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001816 u8 type = XFRM_POLICY_TYPE_MAIN;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001817 int err;
Joy Latten161a09e2006-11-27 13:11:54 -06001818 struct xfrm_audit audit_info;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001819
Thomas Graf35a7aa02007-08-22 14:00:40 -07001820 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001821 if (err)
1822 return err;
1823
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001824 audit_info.loginuid = audit_get_loginuid(current);
1825 audit_info.sessionid = audit_get_sessionid(current);
1826 security_task_getsecid(current, &audit_info.secid);
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001827 err = xfrm_policy_flush(net, type, &audit_info);
Jamal Hadi Salim2f1eb652010-02-19 02:00:42 +00001828 if (err) {
1829 if (err == -ESRCH) /* empty table */
1830 return 0;
David S. Miller069c4742010-02-17 13:41:40 -08001831 return err;
Jamal Hadi Salim2f1eb652010-02-19 02:00:42 +00001832 }
1833
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001834 c.data.type = type;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001835 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001836 c.seq = nlh->nlmsg_seq;
1837 c.pid = nlh->nlmsg_pid;
Alexey Dobriyan70678022008-11-25 17:50:36 -08001838 c.net = net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001839 km_policy_notify(NULL, 0, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840 return 0;
1841}
1842
Christoph Hellwig22e70052007-01-02 15:22:30 -08001843static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001844 struct nlattr **attrs)
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001845{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001846 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001847 struct xfrm_policy *xp;
Thomas Graf7b67c852007-08-22 13:53:52 -07001848 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001849 struct xfrm_userpolicy_info *p = &up->pol;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001850 u8 type = XFRM_POLICY_TYPE_MAIN;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001851 int err = -ENOENT;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001852 struct xfrm_mark m;
1853 u32 mark = xfrm_mark_get(attrs, &m);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001854
Thomas Graf35a7aa02007-08-22 14:00:40 -07001855 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001856 if (err)
1857 return err;
1858
Timo Teräsc8bf4d02010-03-31 00:17:04 +00001859 err = verify_policy_dir(p->dir);
1860 if (err)
1861 return err;
1862
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001863 if (p->index)
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001864 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001865 else {
Thomas Graf5424f322007-08-22 14:01:33 -07001866 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Paul Moore03e1ad72008-04-12 19:07:52 -07001867 struct xfrm_sec_ctx *ctx;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001868
Thomas Graf35a7aa02007-08-22 14:00:40 -07001869 err = verify_sec_ctx_len(attrs);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001870 if (err)
1871 return err;
1872
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001873 ctx = NULL;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001874 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001875 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001876
Paul Moore03e1ad72008-04-12 19:07:52 -07001877 err = security_xfrm_policy_alloc(&ctx, uctx);
1878 if (err)
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001879 return err;
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001880 }
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001881 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001882 &p->sel, ctx, 0, &err);
Paul Moore03e1ad72008-04-12 19:07:52 -07001883 security_xfrm_policy_free(ctx);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001884 }
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001885 if (xp == NULL)
Eric Parisef41aaa2007-03-07 15:37:58 -08001886 return -ENOENT;
Paul Moore03e1ad72008-04-12 19:07:52 -07001887
Timo Teräsea2dea92010-03-31 00:17:05 +00001888 if (unlikely(xp->walk.dead))
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001889 goto out;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001890
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001891 err = 0;
1892 if (up->hard) {
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001893 uid_t loginuid = audit_get_loginuid(current);
1894 u32 sessionid = audit_get_sessionid(current);
1895 u32 sid;
1896
1897 security_task_getsecid(current, &sid);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001898 xfrm_policy_delete(xp, p->dir);
Eric Paris25323862008-04-18 10:09:25 -04001899 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -06001900
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001901 } else {
1902 // reset the timers here?
stephen hemminger62db5cf2010-05-12 06:37:06 +00001903 WARN(1, "Dont know what to do with soft policy expire\n");
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001904 }
1905 km_policy_expired(xp, p->dir, up->hard, current->pid);
1906
1907out:
1908 xfrm_pol_put(xp);
1909 return err;
1910}
1911
Christoph Hellwig22e70052007-01-02 15:22:30 -08001912static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001913 struct nlattr **attrs)
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001914{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001915 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001916 struct xfrm_state *x;
1917 int err;
Thomas Graf7b67c852007-08-22 13:53:52 -07001918 struct xfrm_user_expire *ue = nlmsg_data(nlh);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001919 struct xfrm_usersa_info *p = &ue->state;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001920 struct xfrm_mark m;
Nicolas Dichtel928497f2010-08-31 05:54:00 +00001921 u32 mark = xfrm_mark_get(attrs, &m);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001922
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001923 x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001924
David S. Miller3a765aa2007-02-26 14:52:21 -08001925 err = -ENOENT;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001926 if (x == NULL)
1927 return err;
1928
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001929 spin_lock_bh(&x->lock);
David S. Miller3a765aa2007-02-26 14:52:21 -08001930 err = -EINVAL;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001931 if (x->km.state != XFRM_STATE_VALID)
1932 goto out;
1933 km_state_expired(x, ue->hard, current->pid);
1934
Joy Latten161a09e2006-11-27 13:11:54 -06001935 if (ue->hard) {
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001936 uid_t loginuid = audit_get_loginuid(current);
1937 u32 sessionid = audit_get_sessionid(current);
1938 u32 sid;
1939
1940 security_task_getsecid(current, &sid);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001941 __xfrm_state_delete(x);
Eric Paris25323862008-04-18 10:09:25 -04001942 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -06001943 }
David S. Miller3a765aa2007-02-26 14:52:21 -08001944 err = 0;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001945out:
1946 spin_unlock_bh(&x->lock);
1947 xfrm_state_put(x);
1948 return err;
1949}
1950
Christoph Hellwig22e70052007-01-02 15:22:30 -08001951static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001952 struct nlattr **attrs)
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001953{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001954 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001955 struct xfrm_policy *xp;
1956 struct xfrm_user_tmpl *ut;
1957 int i;
Thomas Graf5424f322007-08-22 14:01:33 -07001958 struct nlattr *rt = attrs[XFRMA_TMPL];
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001959 struct xfrm_mark mark;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001960
Thomas Graf7b67c852007-08-22 13:53:52 -07001961 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001962 struct xfrm_state *x = xfrm_state_alloc(net);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001963 int err = -ENOMEM;
1964
1965 if (!x)
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08001966 goto nomem;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001967
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001968 xfrm_mark_get(attrs, &mark);
1969
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001970 err = verify_newpolicy_info(&ua->policy);
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08001971 if (err)
1972 goto bad_policy;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001973
1974 /* build an XP */
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001975 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08001976 if (!xp)
1977 goto free_state;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001978
1979 memcpy(&x->id, &ua->id, sizeof(ua->id));
1980 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1981 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001982 xp->mark.m = x->mark.m = mark.m;
1983 xp->mark.v = x->mark.v = mark.v;
Thomas Graf5424f322007-08-22 14:01:33 -07001984 ut = nla_data(rt);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001985 /* extract the templates and for each call km_key */
1986 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1987 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1988 memcpy(&x->id, &t->id, sizeof(x->id));
1989 x->props.mode = t->mode;
1990 x->props.reqid = t->reqid;
1991 x->props.family = ut->family;
1992 t->aalgos = ua->aalgos;
1993 t->ealgos = ua->ealgos;
1994 t->calgos = ua->calgos;
1995 err = km_query(x, t, xp);
1996
1997 }
1998
1999 kfree(x);
2000 kfree(xp);
2001
2002 return 0;
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002003
2004bad_policy:
stephen hemminger62db5cf2010-05-12 06:37:06 +00002005 WARN(1, "BAD policy passed\n");
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002006free_state:
2007 kfree(x);
2008nomem:
2009 return err;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002010}
2011
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002012#ifdef CONFIG_XFRM_MIGRATE
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002013static int copy_from_user_migrate(struct xfrm_migrate *ma,
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002014 struct xfrm_kmaddress *k,
Thomas Graf5424f322007-08-22 14:01:33 -07002015 struct nlattr **attrs, int *num)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002016{
Thomas Graf5424f322007-08-22 14:01:33 -07002017 struct nlattr *rt = attrs[XFRMA_MIGRATE];
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002018 struct xfrm_user_migrate *um;
2019 int i, num_migrate;
2020
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002021 if (k != NULL) {
2022 struct xfrm_user_kmaddress *uk;
2023
2024 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2025 memcpy(&k->local, &uk->local, sizeof(k->local));
2026 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2027 k->family = uk->family;
2028 k->reserved = uk->reserved;
2029 }
2030
Thomas Graf5424f322007-08-22 14:01:33 -07002031 um = nla_data(rt);
2032 num_migrate = nla_len(rt) / sizeof(*um);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002033
2034 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2035 return -EINVAL;
2036
2037 for (i = 0; i < num_migrate; i++, um++, ma++) {
2038 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2039 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2040 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2041 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2042
2043 ma->proto = um->proto;
2044 ma->mode = um->mode;
2045 ma->reqid = um->reqid;
2046
2047 ma->old_family = um->old_family;
2048 ma->new_family = um->new_family;
2049 }
2050
2051 *num = i;
2052 return 0;
2053}
2054
2055static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07002056 struct nlattr **attrs)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002057{
Thomas Graf7b67c852007-08-22 13:53:52 -07002058 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002059 struct xfrm_migrate m[XFRM_MAX_DEPTH];
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002060 struct xfrm_kmaddress km, *kmp;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002061 u8 type;
2062 int err;
2063 int n = 0;
2064
Thomas Graf35a7aa02007-08-22 14:00:40 -07002065 if (attrs[XFRMA_MIGRATE] == NULL)
Thomas Grafcf5cb792007-08-22 13:59:04 -07002066 return -EINVAL;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002067
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002068 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2069
Thomas Graf5424f322007-08-22 14:01:33 -07002070 err = copy_from_user_policy_type(&type, attrs);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002071 if (err)
2072 return err;
2073
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002074 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002075 if (err)
2076 return err;
2077
2078 if (!n)
2079 return 0;
2080
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002081 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002082
2083 return 0;
2084}
2085#else
2086static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07002087 struct nlattr **attrs)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002088{
2089 return -ENOPROTOOPT;
2090}
2091#endif
2092
2093#ifdef CONFIG_XFRM_MIGRATE
David S. Miller183cad12011-02-24 00:28:01 -05002094static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002095{
2096 struct xfrm_user_migrate um;
2097
2098 memset(&um, 0, sizeof(um));
2099 um.proto = m->proto;
2100 um.mode = m->mode;
2101 um.reqid = m->reqid;
2102 um.old_family = m->old_family;
2103 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2104 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2105 um.new_family = m->new_family;
2106 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2107 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2108
Thomas Grafc0144be2007-08-22 13:55:43 -07002109 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002110}
2111
David S. Miller183cad12011-02-24 00:28:01 -05002112static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002113{
2114 struct xfrm_user_kmaddress uk;
2115
2116 memset(&uk, 0, sizeof(uk));
2117 uk.family = k->family;
2118 uk.reserved = k->reserved;
2119 memcpy(&uk.local, &k->local, sizeof(uk.local));
Arnaud Ebalarda1caa322008-11-03 01:30:23 -08002120 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002121
2122 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2123}
2124
2125static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
Thomas Graf7deb2262007-08-22 13:57:39 -07002126{
2127 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002128 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2129 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2130 + userpolicy_type_attrsize();
Thomas Graf7deb2262007-08-22 13:57:39 -07002131}
2132
David S. Miller183cad12011-02-24 00:28:01 -05002133static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2134 int num_migrate, const struct xfrm_kmaddress *k,
2135 const struct xfrm_selector *sel, u8 dir, u8 type)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002136{
David S. Miller183cad12011-02-24 00:28:01 -05002137 const struct xfrm_migrate *mp;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002138 struct xfrm_userpolicy_id *pol_id;
2139 struct nlmsghdr *nlh;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002140 int i;
2141
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002142 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2143 if (nlh == NULL)
2144 return -EMSGSIZE;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002145
Thomas Graf7b67c852007-08-22 13:53:52 -07002146 pol_id = nlmsg_data(nlh);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002147 /* copy data from selector, dir, and type to the pol_id */
2148 memset(pol_id, 0, sizeof(*pol_id));
2149 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2150 pol_id->dir = dir;
2151
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002152 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
2153 goto nlmsg_failure;
2154
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002155 if (copy_to_user_policy_type(type, skb) < 0)
2156 goto nlmsg_failure;
2157
2158 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
2159 if (copy_to_user_migrate(mp, skb) < 0)
2160 goto nlmsg_failure;
2161 }
2162
Thomas Graf98250692007-08-22 12:47:26 -07002163 return nlmsg_end(skb, nlh);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002164nlmsg_failure:
Thomas Graf98250692007-08-22 12:47:26 -07002165 nlmsg_cancel(skb, nlh);
2166 return -EMSGSIZE;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002167}
2168
David S. Miller183cad12011-02-24 00:28:01 -05002169static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2170 const struct xfrm_migrate *m, int num_migrate,
2171 const struct xfrm_kmaddress *k)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002172{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002173 struct net *net = &init_net;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002174 struct sk_buff *skb;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002175
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002176 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002177 if (skb == NULL)
2178 return -ENOMEM;
2179
2180 /* build migrate */
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002181 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002182 BUG();
2183
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002184 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002185}
2186#else
David S. Miller183cad12011-02-24 00:28:01 -05002187static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2188 const struct xfrm_migrate *m, int num_migrate,
2189 const struct xfrm_kmaddress *k)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002190{
2191 return -ENOPROTOOPT;
2192}
2193#endif
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002194
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002195#define XMSGSIZE(type) sizeof(struct type)
Thomas Graf492b5582005-05-03 14:26:40 -07002196
2197static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
David S. Miller66f9a252009-01-20 09:49:51 -08002198 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
Thomas Graf492b5582005-05-03 14:26:40 -07002199 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2200 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2201 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2202 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2203 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2204 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002205 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002206 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
Thomas Graf492b5582005-05-03 14:26:40 -07002207 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
David S. Miller66f9a252009-01-20 09:49:51 -08002208 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002209 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
Thomas Graf492b5582005-05-03 14:26:40 -07002210 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002211 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002212 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2213 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002214 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002215 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002216 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2217 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218};
2219
Thomas Graf492b5582005-05-03 14:26:40 -07002220#undef XMSGSIZE
2221
Thomas Grafcf5cb792007-08-22 13:59:04 -07002222static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
jamalc28e9302010-02-09 03:59:38 +00002223 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2224 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2225 [XFRMA_LASTUSED] = { .type = NLA_U64},
2226 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
Herbert Xu1a6509d2008-01-28 19:37:29 -08002227 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
Thomas Grafcf5cb792007-08-22 13:59:04 -07002228 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2229 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2230 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2231 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2232 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2233 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2234 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2235 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2236 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2237 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2238 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2239 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2240 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2241 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002242 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002243 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
Martin Willi35d28562010-12-08 04:37:49 +00002244 [XFRMA_TFCPAD] = { .type = NLA_U32 },
Steffen Klassertd8647b72011-03-08 00:10:27 +00002245 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
Thomas Grafcf5cb792007-08-22 13:59:04 -07002246};
2247
Linus Torvalds1da177e2005-04-16 15:20:36 -07002248static struct xfrm_link {
Thomas Graf5424f322007-08-22 14:01:33 -07002249 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002250 int (*dump)(struct sk_buff *, struct netlink_callback *);
Timo Teras4c563f72008-02-28 21:31:08 -08002251 int (*done)(struct netlink_callback *);
Thomas Graf492b5582005-05-03 14:26:40 -07002252} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2253 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2254 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2255 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
Timo Teras4c563f72008-02-28 21:31:08 -08002256 .dump = xfrm_dump_sa,
2257 .done = xfrm_dump_sa_done },
Thomas Graf492b5582005-05-03 14:26:40 -07002258 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2259 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2260 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
Timo Teras4c563f72008-02-28 21:31:08 -08002261 .dump = xfrm_dump_policy,
2262 .done = xfrm_dump_policy_done },
Thomas Graf492b5582005-05-03 14:26:40 -07002263 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002264 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002265 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
Thomas Graf492b5582005-05-03 14:26:40 -07002266 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2267 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002268 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
Thomas Graf492b5582005-05-03 14:26:40 -07002269 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2270 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002271 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2272 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002273 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
Jamal Hadi Salim566ec032007-04-26 14:12:15 -07002274 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07002275 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276};
2277
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002278static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002280 struct net *net = sock_net(skb->sk);
Thomas Graf35a7aa02007-08-22 14:00:40 -07002281 struct nlattr *attrs[XFRMA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282 struct xfrm_link *link;
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002283 int type, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002286 if (type > XFRM_MSG_MAX)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002287 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288
2289 type -= XFRM_MSG_BASE;
2290 link = &xfrm_dispatch[type];
2291
2292 /* All operations require privileges, even GET */
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002293 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2294 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295
Thomas Graf492b5582005-05-03 14:26:40 -07002296 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2297 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
David S. Millerb8f3ab42011-01-18 12:40:38 -08002298 (nlh->nlmsg_flags & NLM_F_DUMP)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299 if (link->dump == NULL)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002300 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002301
Greg Rosec7ac8672011-06-10 01:27:09 +00002302 return netlink_dump_start(net->xfrm.nlsk, skb, nlh,
2303 link->dump, link->done, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002304 }
2305
Thomas Graf35a7aa02007-08-22 14:00:40 -07002306 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
Thomas Grafcf5cb792007-08-22 13:59:04 -07002307 xfrma_policy);
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002308 if (err < 0)
2309 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310
2311 if (link->doit == NULL)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002312 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313
Thomas Graf5424f322007-08-22 14:01:33 -07002314 return link->doit(skb, nlh, attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002315}
2316
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002317static void xfrm_netlink_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002319 mutex_lock(&xfrm_cfg_mutex);
2320 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2321 mutex_unlock(&xfrm_cfg_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002322}
2323
Thomas Graf7deb2262007-08-22 13:57:39 -07002324static inline size_t xfrm_expire_msgsize(void)
2325{
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002326 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2327 + nla_total_size(sizeof(struct xfrm_mark));
Thomas Graf7deb2262007-08-22 13:57:39 -07002328}
2329
David S. Miller214e0052011-02-24 00:02:38 -05002330static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331{
2332 struct xfrm_user_expire *ue;
2333 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002335 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2336 if (nlh == NULL)
2337 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338
Thomas Graf7b67c852007-08-22 13:53:52 -07002339 ue = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340 copy_to_user_state(x, &ue->state);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002341 ue->hard = (c->data.hard != 0) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002342
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002343 if (xfrm_mark_put(skb, &x->mark))
2344 goto nla_put_failure;
2345
Thomas Graf98250692007-08-22 12:47:26 -07002346 return nlmsg_end(skb, nlh);
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002347
2348nla_put_failure:
2349 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350}
2351
David S. Miller214e0052011-02-24 00:02:38 -05002352static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002354 struct net *net = xs_net(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 struct sk_buff *skb;
2356
Thomas Graf7deb2262007-08-22 13:57:39 -07002357 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002358 if (skb == NULL)
2359 return -ENOMEM;
2360
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002361 if (build_expire(skb, x, c) < 0) {
2362 kfree_skb(skb);
2363 return -EMSGSIZE;
2364 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002366 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367}
2368
David S. Miller214e0052011-02-24 00:02:38 -05002369static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002370{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002371 struct net *net = xs_net(x);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002372 struct sk_buff *skb;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002373
Steffen Klassertd8647b72011-03-08 00:10:27 +00002374 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002375 if (skb == NULL)
2376 return -ENOMEM;
2377
2378 if (build_aevent(skb, x, c) < 0)
2379 BUG();
2380
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002381 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002382}
2383
David S. Miller214e0052011-02-24 00:02:38 -05002384static int xfrm_notify_sa_flush(const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002385{
Alexey Dobriyan70678022008-11-25 17:50:36 -08002386 struct net *net = c->net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002387 struct xfrm_usersa_flush *p;
2388 struct nlmsghdr *nlh;
2389 struct sk_buff *skb;
Thomas Graf7deb2262007-08-22 13:57:39 -07002390 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002391
Thomas Graf7deb2262007-08-22 13:57:39 -07002392 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002393 if (skb == NULL)
2394 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002395
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002396 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2397 if (nlh == NULL) {
2398 kfree_skb(skb);
2399 return -EMSGSIZE;
2400 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002401
Thomas Graf7b67c852007-08-22 13:53:52 -07002402 p = nlmsg_data(nlh);
Herbert Xubf088672005-06-18 22:44:00 -07002403 p->proto = c->data.proto;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002404
Thomas Graf98250692007-08-22 12:47:26 -07002405 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002406
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002407 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002408}
2409
Thomas Graf7deb2262007-08-22 13:57:39 -07002410static inline size_t xfrm_sa_len(struct xfrm_state *x)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002411{
Thomas Graf7deb2262007-08-22 13:57:39 -07002412 size_t l = 0;
Herbert Xu1a6509d2008-01-28 19:37:29 -08002413 if (x->aead)
2414 l += nla_total_size(aead_len(x->aead));
Martin Willi4447bb32009-11-25 00:29:52 +00002415 if (x->aalg) {
2416 l += nla_total_size(sizeof(struct xfrm_algo) +
2417 (x->aalg->alg_key_len + 7) / 8);
2418 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2419 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002420 if (x->ealg)
Eric Dumazet0f99be02008-01-08 23:39:06 -08002421 l += nla_total_size(xfrm_alg_len(x->ealg));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002422 if (x->calg)
Thomas Graf7deb2262007-08-22 13:57:39 -07002423 l += nla_total_size(sizeof(*x->calg));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002424 if (x->encap)
Thomas Graf7deb2262007-08-22 13:57:39 -07002425 l += nla_total_size(sizeof(*x->encap));
Martin Willi35d28562010-12-08 04:37:49 +00002426 if (x->tfcpad)
2427 l += nla_total_size(sizeof(x->tfcpad));
Steffen Klassertd8647b72011-03-08 00:10:27 +00002428 if (x->replay_esn)
2429 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
Herbert Xu68325d32007-10-09 13:30:57 -07002430 if (x->security)
2431 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2432 x->security->ctx_len);
2433 if (x->coaddr)
2434 l += nla_total_size(sizeof(*x->coaddr));
2435
Herbert Xud26f3982007-11-13 21:47:08 -08002436 /* Must count x->lastused as it may become non-zero behind our back. */
2437 l += nla_total_size(sizeof(u64));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002438
2439 return l;
2440}
2441
David S. Miller214e0052011-02-24 00:02:38 -05002442static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002443{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002444 struct net *net = xs_net(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002445 struct xfrm_usersa_info *p;
Herbert Xu0603eac2005-06-18 22:54:36 -07002446 struct xfrm_usersa_id *id;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002447 struct nlmsghdr *nlh;
2448 struct sk_buff *skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002449 int len = xfrm_sa_len(x);
Herbert Xu0603eac2005-06-18 22:54:36 -07002450 int headlen;
2451
2452 headlen = sizeof(*p);
2453 if (c->event == XFRM_MSG_DELSA) {
Thomas Graf7deb2262007-08-22 13:57:39 -07002454 len += nla_total_size(headlen);
Herbert Xu0603eac2005-06-18 22:54:36 -07002455 headlen = sizeof(*id);
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002456 len += nla_total_size(sizeof(struct xfrm_mark));
Herbert Xu0603eac2005-06-18 22:54:36 -07002457 }
Thomas Graf7deb2262007-08-22 13:57:39 -07002458 len += NLMSG_ALIGN(headlen);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002459
Thomas Graf7deb2262007-08-22 13:57:39 -07002460 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002461 if (skb == NULL)
2462 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002463
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002464 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2465 if (nlh == NULL)
Thomas Grafc0144be2007-08-22 13:55:43 -07002466 goto nla_put_failure;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002467
Thomas Graf7b67c852007-08-22 13:53:52 -07002468 p = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002469 if (c->event == XFRM_MSG_DELSA) {
Thomas Grafc0144be2007-08-22 13:55:43 -07002470 struct nlattr *attr;
2471
Thomas Graf7b67c852007-08-22 13:53:52 -07002472 id = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002473 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2474 id->spi = x->id.spi;
2475 id->family = x->props.family;
2476 id->proto = x->id.proto;
2477
Thomas Grafc0144be2007-08-22 13:55:43 -07002478 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2479 if (attr == NULL)
2480 goto nla_put_failure;
2481
2482 p = nla_data(attr);
Herbert Xu0603eac2005-06-18 22:54:36 -07002483 }
2484
Herbert Xu68325d32007-10-09 13:30:57 -07002485 if (copy_to_user_state_extra(x, p, skb))
2486 goto nla_put_failure;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002487
Thomas Graf98250692007-08-22 12:47:26 -07002488 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002489
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002490 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002491
Thomas Grafc0144be2007-08-22 13:55:43 -07002492nla_put_failure:
Herbert Xu68325d32007-10-09 13:30:57 -07002493 /* Somebody screwed up with xfrm_sa_len! */
2494 WARN_ON(1);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002495 kfree_skb(skb);
2496 return -1;
2497}
2498
David S. Miller214e0052011-02-24 00:02:38 -05002499static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002500{
2501
2502 switch (c->event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07002503 case XFRM_MSG_EXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002504 return xfrm_exp_state_notify(x, c);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002505 case XFRM_MSG_NEWAE:
2506 return xfrm_aevent_state_notify(x, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002507 case XFRM_MSG_DELSA:
2508 case XFRM_MSG_UPDSA:
2509 case XFRM_MSG_NEWSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002510 return xfrm_notify_sa(x, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002511 case XFRM_MSG_FLUSHSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002512 return xfrm_notify_sa_flush(c);
2513 default:
stephen hemminger62db5cf2010-05-12 06:37:06 +00002514 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2515 c->event);
2516 break;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002517 }
2518
2519 return 0;
2520
2521}
2522
Thomas Graf7deb2262007-08-22 13:57:39 -07002523static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2524 struct xfrm_policy *xp)
2525{
2526 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2527 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002528 + nla_total_size(sizeof(struct xfrm_mark))
Thomas Graf7deb2262007-08-22 13:57:39 -07002529 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2530 + userpolicy_type_attrsize();
2531}
2532
Linus Torvalds1da177e2005-04-16 15:20:36 -07002533static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2534 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2535 int dir)
2536{
2537 struct xfrm_user_acquire *ua;
2538 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002539 __u32 seq = xfrm_get_acqseq();
2540
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002541 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2542 if (nlh == NULL)
2543 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002544
Thomas Graf7b67c852007-08-22 13:53:52 -07002545 ua = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002546 memcpy(&ua->id, &x->id, sizeof(ua->id));
2547 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2548 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2549 copy_to_user_policy(xp, &ua->policy, dir);
2550 ua->aalgos = xt->aalgos;
2551 ua->ealgos = xt->ealgos;
2552 ua->calgos = xt->calgos;
2553 ua->seq = x->km.seq = seq;
2554
2555 if (copy_to_user_tmpl(xp, skb) < 0)
2556 goto nlmsg_failure;
Serge Hallyn0d681622006-07-24 23:30:44 -07002557 if (copy_to_user_state_sec_ctx(x, skb))
Trent Jaegerdf718372005-12-13 23:12:27 -08002558 goto nlmsg_failure;
Jamal Hadi Salim1459bb32006-11-20 16:51:22 -08002559 if (copy_to_user_policy_type(xp->type, skb) < 0)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002560 goto nlmsg_failure;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002561 if (xfrm_mark_put(skb, &xp->mark))
2562 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002563
Thomas Graf98250692007-08-22 12:47:26 -07002564 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002565
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002566nla_put_failure:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567nlmsg_failure:
Thomas Graf98250692007-08-22 12:47:26 -07002568 nlmsg_cancel(skb, nlh);
2569 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002570}
2571
2572static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2573 struct xfrm_policy *xp, int dir)
2574{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002575 struct net *net = xs_net(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002576 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002577
Thomas Graf7deb2262007-08-22 13:57:39 -07002578 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579 if (skb == NULL)
2580 return -ENOMEM;
2581
2582 if (build_acquire(skb, x, xt, xp, dir) < 0)
2583 BUG();
2584
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002585 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002586}
2587
2588/* User gives us xfrm_user_policy_info followed by an array of 0
2589 * or more templates.
2590 */
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07002591static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592 u8 *data, int len, int *dir)
2593{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002594 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002595 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2596 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2597 struct xfrm_policy *xp;
2598 int nr;
2599
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07002600 switch (sk->sk_family) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002601 case AF_INET:
2602 if (opt != IP_XFRM_POLICY) {
2603 *dir = -EOPNOTSUPP;
2604 return NULL;
2605 }
2606 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00002607#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608 case AF_INET6:
2609 if (opt != IPV6_XFRM_POLICY) {
2610 *dir = -EOPNOTSUPP;
2611 return NULL;
2612 }
2613 break;
2614#endif
2615 default:
2616 *dir = -EINVAL;
2617 return NULL;
2618 }
2619
2620 *dir = -EINVAL;
2621
2622 if (len < sizeof(*p) ||
2623 verify_newpolicy_info(p))
2624 return NULL;
2625
2626 nr = ((len - sizeof(*p)) / sizeof(*ut));
David S. Millerb4ad86bf2006-12-03 19:19:26 -08002627 if (validate_tmpl(nr, ut, p->sel.family))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628 return NULL;
2629
Herbert Xua4f1bac2005-07-26 15:43:17 -07002630 if (p->dir > XFRM_POLICY_OUT)
2631 return NULL;
2632
Herbert Xu2f09a4d2010-08-14 22:38:09 -07002633 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002634 if (xp == NULL) {
2635 *dir = -ENOBUFS;
2636 return NULL;
2637 }
2638
2639 copy_from_user_policy(xp, p);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002640 xp->type = XFRM_POLICY_TYPE_MAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002641 copy_templates(xp, ut, nr);
2642
2643 *dir = p->dir;
2644
2645 return xp;
2646}
2647
Thomas Graf7deb2262007-08-22 13:57:39 -07002648static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2649{
2650 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2651 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2652 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002653 + nla_total_size(sizeof(struct xfrm_mark))
Thomas Graf7deb2262007-08-22 13:57:39 -07002654 + userpolicy_type_attrsize();
2655}
2656
Linus Torvalds1da177e2005-04-16 15:20:36 -07002657static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
David S. Miller214e0052011-02-24 00:02:38 -05002658 int dir, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002659{
2660 struct xfrm_user_polexpire *upe;
2661 struct nlmsghdr *nlh;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002662 int hard = c->data.hard;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002663
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002664 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2665 if (nlh == NULL)
2666 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002667
Thomas Graf7b67c852007-08-22 13:53:52 -07002668 upe = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002669 copy_to_user_policy(xp, &upe->pol, dir);
2670 if (copy_to_user_tmpl(xp, skb) < 0)
2671 goto nlmsg_failure;
Trent Jaegerdf718372005-12-13 23:12:27 -08002672 if (copy_to_user_sec_ctx(xp, skb))
2673 goto nlmsg_failure;
Jamal Hadi Salim1459bb32006-11-20 16:51:22 -08002674 if (copy_to_user_policy_type(xp->type, skb) < 0)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002675 goto nlmsg_failure;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002676 if (xfrm_mark_put(skb, &xp->mark))
2677 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002678 upe->hard = !!hard;
2679
Thomas Graf98250692007-08-22 12:47:26 -07002680 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002681
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002682nla_put_failure:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683nlmsg_failure:
Thomas Graf98250692007-08-22 12:47:26 -07002684 nlmsg_cancel(skb, nlh);
2685 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002686}
2687
David S. Miller214e0052011-02-24 00:02:38 -05002688static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002690 struct net *net = xp_net(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002691 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002692
Thomas Graf7deb2262007-08-22 13:57:39 -07002693 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694 if (skb == NULL)
2695 return -ENOMEM;
2696
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002697 if (build_polexpire(skb, xp, dir, c) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002698 BUG();
2699
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002700 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002701}
2702
David S. Miller214e0052011-02-24 00:02:38 -05002703static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002704{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002705 struct net *net = xp_net(xp);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002706 struct xfrm_userpolicy_info *p;
Herbert Xu0603eac2005-06-18 22:54:36 -07002707 struct xfrm_userpolicy_id *id;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002708 struct nlmsghdr *nlh;
2709 struct sk_buff *skb;
Thomas Graf7deb2262007-08-22 13:57:39 -07002710 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
Herbert Xu0603eac2005-06-18 22:54:36 -07002711 int headlen;
2712
2713 headlen = sizeof(*p);
2714 if (c->event == XFRM_MSG_DELPOLICY) {
Thomas Graf7deb2262007-08-22 13:57:39 -07002715 len += nla_total_size(headlen);
Herbert Xu0603eac2005-06-18 22:54:36 -07002716 headlen = sizeof(*id);
2717 }
Thomas Grafcfbfd452007-08-22 13:57:04 -07002718 len += userpolicy_type_attrsize();
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002719 len += nla_total_size(sizeof(struct xfrm_mark));
Thomas Graf7deb2262007-08-22 13:57:39 -07002720 len += NLMSG_ALIGN(headlen);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002721
Thomas Graf7deb2262007-08-22 13:57:39 -07002722 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002723 if (skb == NULL)
2724 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002725
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002726 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2727 if (nlh == NULL)
2728 goto nlmsg_failure;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002729
Thomas Graf7b67c852007-08-22 13:53:52 -07002730 p = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002731 if (c->event == XFRM_MSG_DELPOLICY) {
Thomas Grafc0144be2007-08-22 13:55:43 -07002732 struct nlattr *attr;
2733
Thomas Graf7b67c852007-08-22 13:53:52 -07002734 id = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002735 memset(id, 0, sizeof(*id));
2736 id->dir = dir;
2737 if (c->data.byid)
2738 id->index = xp->index;
2739 else
2740 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2741
Thomas Grafc0144be2007-08-22 13:55:43 -07002742 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2743 if (attr == NULL)
2744 goto nlmsg_failure;
2745
2746 p = nla_data(attr);
Herbert Xu0603eac2005-06-18 22:54:36 -07002747 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002748
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002749 copy_to_user_policy(xp, p, dir);
2750 if (copy_to_user_tmpl(xp, skb) < 0)
2751 goto nlmsg_failure;
Jamal Hadi Salim1459bb32006-11-20 16:51:22 -08002752 if (copy_to_user_policy_type(xp->type, skb) < 0)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002753 goto nlmsg_failure;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002754
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002755 if (xfrm_mark_put(skb, &xp->mark))
2756 goto nla_put_failure;
2757
Thomas Graf98250692007-08-22 12:47:26 -07002758 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002759
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002760 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002761
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002762nla_put_failure:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002763nlmsg_failure:
2764 kfree_skb(skb);
2765 return -1;
2766}
2767
David S. Miller214e0052011-02-24 00:02:38 -05002768static int xfrm_notify_policy_flush(const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002769{
Alexey Dobriyan70678022008-11-25 17:50:36 -08002770 struct net *net = c->net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002771 struct nlmsghdr *nlh;
2772 struct sk_buff *skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002773
Thomas Graf7deb2262007-08-22 13:57:39 -07002774 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002775 if (skb == NULL)
2776 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002777
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002778 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2779 if (nlh == NULL)
2780 goto nlmsg_failure;
Jamal Hadi Salim0c51f532006-11-27 12:58:20 -08002781 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2782 goto nlmsg_failure;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002783
Thomas Graf98250692007-08-22 12:47:26 -07002784 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002785
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002786 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002787
2788nlmsg_failure:
2789 kfree_skb(skb);
2790 return -1;
2791}
2792
David S. Miller214e0052011-02-24 00:02:38 -05002793static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002794{
2795
2796 switch (c->event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07002797 case XFRM_MSG_NEWPOLICY:
2798 case XFRM_MSG_UPDPOLICY:
2799 case XFRM_MSG_DELPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002800 return xfrm_notify_policy(xp, dir, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002801 case XFRM_MSG_FLUSHPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002802 return xfrm_notify_policy_flush(c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002803 case XFRM_MSG_POLEXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002804 return xfrm_exp_policy_notify(xp, dir, c);
2805 default:
stephen hemminger62db5cf2010-05-12 06:37:06 +00002806 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2807 c->event);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002808 }
2809
2810 return 0;
2811
2812}
2813
Thomas Graf7deb2262007-08-22 13:57:39 -07002814static inline size_t xfrm_report_msgsize(void)
2815{
2816 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2817}
2818
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002819static int build_report(struct sk_buff *skb, u8 proto,
2820 struct xfrm_selector *sel, xfrm_address_t *addr)
2821{
2822 struct xfrm_user_report *ur;
2823 struct nlmsghdr *nlh;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002824
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002825 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2826 if (nlh == NULL)
2827 return -EMSGSIZE;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002828
Thomas Graf7b67c852007-08-22 13:53:52 -07002829 ur = nlmsg_data(nlh);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002830 ur->proto = proto;
2831 memcpy(&ur->sel, sel, sizeof(ur->sel));
2832
2833 if (addr)
Thomas Grafc0144be2007-08-22 13:55:43 -07002834 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002835
Thomas Graf98250692007-08-22 12:47:26 -07002836 return nlmsg_end(skb, nlh);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002837
Thomas Grafc0144be2007-08-22 13:55:43 -07002838nla_put_failure:
Thomas Graf98250692007-08-22 12:47:26 -07002839 nlmsg_cancel(skb, nlh);
2840 return -EMSGSIZE;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002841}
2842
Alexey Dobriyandb983c12008-11-25 17:51:01 -08002843static int xfrm_send_report(struct net *net, u8 proto,
2844 struct xfrm_selector *sel, xfrm_address_t *addr)
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002845{
2846 struct sk_buff *skb;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002847
Thomas Graf7deb2262007-08-22 13:57:39 -07002848 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002849 if (skb == NULL)
2850 return -ENOMEM;
2851
2852 if (build_report(skb, proto, sel, addr) < 0)
2853 BUG();
2854
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002855 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002856}
2857
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002858static inline size_t xfrm_mapping_msgsize(void)
2859{
2860 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2861}
2862
2863static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2864 xfrm_address_t *new_saddr, __be16 new_sport)
2865{
2866 struct xfrm_user_mapping *um;
2867 struct nlmsghdr *nlh;
2868
2869 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2870 if (nlh == NULL)
2871 return -EMSGSIZE;
2872
2873 um = nlmsg_data(nlh);
2874
2875 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2876 um->id.spi = x->id.spi;
2877 um->id.family = x->props.family;
2878 um->id.proto = x->id.proto;
2879 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2880 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2881 um->new_sport = new_sport;
2882 um->old_sport = x->encap->encap_sport;
2883 um->reqid = x->props.reqid;
2884
2885 return nlmsg_end(skb, nlh);
2886}
2887
2888static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2889 __be16 sport)
2890{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002891 struct net *net = xs_net(x);
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002892 struct sk_buff *skb;
2893
2894 if (x->id.proto != IPPROTO_ESP)
2895 return -EINVAL;
2896
2897 if (!x->encap)
2898 return -EINVAL;
2899
2900 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2901 if (skb == NULL)
2902 return -ENOMEM;
2903
2904 if (build_mapping(skb, x, ipaddr, sport) < 0)
2905 BUG();
2906
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002907 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002908}
2909
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910static struct xfrm_mgr netlink_mgr = {
2911 .id = "netlink",
2912 .notify = xfrm_send_state_notify,
2913 .acquire = xfrm_send_acquire,
2914 .compile_policy = xfrm_compile_policy,
2915 .notify_policy = xfrm_send_policy_notify,
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002916 .report = xfrm_send_report,
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002917 .migrate = xfrm_send_migrate,
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002918 .new_mapping = xfrm_send_mapping,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002919};
2920
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002921static int __net_init xfrm_user_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002922{
Patrick McHardybe336902006-03-20 22:40:54 -08002923 struct sock *nlsk;
2924
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002925 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
Patrick McHardyaf65bdf2007-04-20 14:14:21 -07002926 xfrm_netlink_rcv, NULL, THIS_MODULE);
Patrick McHardybe336902006-03-20 22:40:54 -08002927 if (nlsk == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002928 return -ENOMEM;
Eric W. Biedermand79d7922009-12-03 02:29:05 +00002929 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00002930 RCU_INIT_POINTER(net->xfrm.nlsk, nlsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002931 return 0;
2932}
2933
Eric W. Biedermand79d7922009-12-03 02:29:05 +00002934static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002935{
Eric W. Biedermand79d7922009-12-03 02:29:05 +00002936 struct net *net;
2937 list_for_each_entry(net, net_exit_list, exit_list)
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00002938 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
Eric W. Biedermand79d7922009-12-03 02:29:05 +00002939 synchronize_net();
2940 list_for_each_entry(net, net_exit_list, exit_list)
2941 netlink_kernel_release(net->xfrm.nlsk_stash);
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002942}
2943
2944static struct pernet_operations xfrm_user_net_ops = {
Eric W. Biedermand79d7922009-12-03 02:29:05 +00002945 .init = xfrm_user_net_init,
2946 .exit_batch = xfrm_user_net_exit,
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002947};
2948
2949static int __init xfrm_user_init(void)
2950{
2951 int rv;
2952
2953 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2954
2955 rv = register_pernet_subsys(&xfrm_user_net_ops);
2956 if (rv < 0)
2957 return rv;
2958 rv = xfrm_register_km(&netlink_mgr);
2959 if (rv < 0)
2960 unregister_pernet_subsys(&xfrm_user_net_ops);
2961 return rv;
2962}
2963
Linus Torvalds1da177e2005-04-16 15:20:36 -07002964static void __exit xfrm_user_exit(void)
2965{
2966 xfrm_unregister_km(&netlink_mgr);
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002967 unregister_pernet_subsys(&xfrm_user_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002968}
2969
2970module_init(xfrm_user_init);
2971module_exit(xfrm_user_exit);
2972MODULE_LICENSE("GPL");
Harald Welte4fdb3bb2005-08-09 19:40:55 -07002973MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08002974