blob: fbd9e6cd0fd7a1297d99b48c37cc6de8ce938bbf [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];
Mathias Krauseecd79182012-09-20 10:01:49 +0000126 struct xfrm_replay_state_esn *rs;
Steffen Klassertd8647b72011-03-08 00:10:27 +0000127
Mathias Krauseecd79182012-09-20 10:01:49 +0000128 if (p->flags & XFRM_STATE_ESN) {
129 if (!rt)
130 return -EINVAL;
131
132 rs = nla_data(rt);
133
134 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
135 return -EINVAL;
136
137 if (nla_len(rt) < xfrm_replay_state_esn_len(rs) &&
138 nla_len(rt) != sizeof(*rs))
139 return -EINVAL;
140 }
Steffen Klassert7833aa02011-04-25 19:41:21 +0000141
Steffen Klassertd8647b72011-03-08 00:10:27 +0000142 if (!rt)
143 return 0;
144
Steffen Klassert02aadf72011-03-28 19:48:09 +0000145 if (p->id.proto != IPPROTO_ESP)
146 return -EINVAL;
147
Steffen Klassertd8647b72011-03-08 00:10:27 +0000148 if (p->replay_window != 0)
149 return -EINVAL;
150
151 return 0;
152}
Trent Jaegerdf718372005-12-13 23:12:27 -0800153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154static int verify_newsa_info(struct xfrm_usersa_info *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700155 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156{
157 int err;
158
159 err = -EINVAL;
160 switch (p->family) {
161 case AF_INET:
162 break;
163
164 case AF_INET6:
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000165#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 break;
167#else
168 err = -EAFNOSUPPORT;
169 goto out;
170#endif
171
172 default:
173 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700174 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
176 err = -EINVAL;
177 switch (p->id.proto) {
178 case IPPROTO_AH:
Martin Willi4447bb32009-11-25 00:29:52 +0000179 if ((!attrs[XFRMA_ALG_AUTH] &&
180 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800181 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700182 attrs[XFRMA_ALG_CRYPT] ||
Martin Willi35d28562010-12-08 04:37:49 +0000183 attrs[XFRMA_ALG_COMP] ||
184 attrs[XFRMA_TFCPAD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 goto out;
186 break;
187
188 case IPPROTO_ESP:
Herbert Xu1a6509d2008-01-28 19:37:29 -0800189 if (attrs[XFRMA_ALG_COMP])
190 goto out;
191 if (!attrs[XFRMA_ALG_AUTH] &&
Martin Willi4447bb32009-11-25 00:29:52 +0000192 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
Herbert Xu1a6509d2008-01-28 19:37:29 -0800193 !attrs[XFRMA_ALG_CRYPT] &&
194 !attrs[XFRMA_ALG_AEAD])
195 goto out;
196 if ((attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000197 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800198 attrs[XFRMA_ALG_CRYPT]) &&
199 attrs[XFRMA_ALG_AEAD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 goto out;
Martin Willi35d28562010-12-08 04:37:49 +0000201 if (attrs[XFRMA_TFCPAD] &&
202 p->mode != XFRM_MODE_TUNNEL)
203 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 break;
205
206 case IPPROTO_COMP:
Thomas Graf35a7aa02007-08-22 14:00:40 -0700207 if (!attrs[XFRMA_ALG_COMP] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800208 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700209 attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000210 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Martin Willi35d28562010-12-08 04:37:49 +0000211 attrs[XFRMA_ALG_CRYPT] ||
212 attrs[XFRMA_TFCPAD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 goto out;
214 break;
215
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000216#if IS_ENABLED(CONFIG_IPV6)
Masahide NAKAMURAe23c7192006-08-23 20:33:28 -0700217 case IPPROTO_DSTOPTS:
218 case IPPROTO_ROUTING:
Thomas Graf35a7aa02007-08-22 14:00:40 -0700219 if (attrs[XFRMA_ALG_COMP] ||
220 attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000221 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800222 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700223 attrs[XFRMA_ALG_CRYPT] ||
224 attrs[XFRMA_ENCAP] ||
225 attrs[XFRMA_SEC_CTX] ||
Martin Willi35d28562010-12-08 04:37:49 +0000226 attrs[XFRMA_TFCPAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700227 !attrs[XFRMA_COADDR])
Masahide NAKAMURAe23c7192006-08-23 20:33:28 -0700228 goto out;
229 break;
230#endif
231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 default:
233 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700234 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Herbert Xu1a6509d2008-01-28 19:37:29 -0800236 if ((err = verify_aead(attrs)))
237 goto out;
Martin Willi4447bb32009-11-25 00:29:52 +0000238 if ((err = verify_auth_trunc(attrs)))
239 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700240 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700242 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700244 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700246 if ((err = verify_sec_ctx_len(attrs)))
Trent Jaegerdf718372005-12-13 23:12:27 -0800247 goto out;
Steffen Klassertd8647b72011-03-08 00:10:27 +0000248 if ((err = verify_replay(p, attrs)))
249 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251 err = -EINVAL;
252 switch (p->mode) {
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700253 case XFRM_MODE_TRANSPORT:
254 case XFRM_MODE_TUNNEL:
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700255 case XFRM_MODE_ROUTEOPTIMIZATION:
Diego Beltrami0a694522006-10-03 23:47:05 -0700256 case XFRM_MODE_BEET:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 break;
258
259 default:
260 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700261 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
263 err = 0;
264
265out:
266 return err;
267}
268
269static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
David S. Miller6f2f19e2011-02-27 23:04:45 -0800270 struct xfrm_algo_desc *(*get_byname)(const char *, int),
Thomas Graf5424f322007-08-22 14:01:33 -0700271 struct nlattr *rta)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 struct xfrm_algo *p, *ualg;
274 struct xfrm_algo_desc *algo;
275
276 if (!rta)
277 return 0;
278
Thomas Graf5424f322007-08-22 14:01:33 -0700279 ualg = nla_data(rta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
281 algo = get_byname(ualg->alg_name, 1);
282 if (!algo)
283 return -ENOSYS;
284 *props = algo->desc.sadb_alg_id;
285
Eric Dumazet0f99be02008-01-08 23:39:06 -0800286 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 if (!p)
288 return -ENOMEM;
289
Herbert Xu04ff1262006-08-13 08:50:00 +1000290 strcpy(p->alg_name, algo->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 *algpp = p;
292 return 0;
293}
294
Martin Willi4447bb32009-11-25 00:29:52 +0000295static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
296 struct nlattr *rta)
297{
298 struct xfrm_algo *ualg;
299 struct xfrm_algo_auth *p;
300 struct xfrm_algo_desc *algo;
301
302 if (!rta)
303 return 0;
304
305 ualg = nla_data(rta);
306
307 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
308 if (!algo)
309 return -ENOSYS;
310 *props = algo->desc.sadb_alg_id;
311
312 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
313 if (!p)
314 return -ENOMEM;
315
316 strcpy(p->alg_name, algo->name);
317 p->alg_key_len = ualg->alg_key_len;
318 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
319 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
320
321 *algpp = p;
322 return 0;
323}
324
325static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
326 struct nlattr *rta)
327{
328 struct xfrm_algo_auth *p, *ualg;
329 struct xfrm_algo_desc *algo;
330
331 if (!rta)
332 return 0;
333
334 ualg = nla_data(rta);
335
336 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
337 if (!algo)
338 return -ENOSYS;
Nicolas Dichtelfa6dd8a2011-01-11 08:04:12 +0000339 if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN ||
340 ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
Martin Willi4447bb32009-11-25 00:29:52 +0000341 return -EINVAL;
342 *props = algo->desc.sadb_alg_id;
343
344 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
345 if (!p)
346 return -ENOMEM;
347
348 strcpy(p->alg_name, algo->name);
349 if (!p->alg_trunc_len)
350 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
351
352 *algpp = p;
353 return 0;
354}
355
Herbert Xu1a6509d2008-01-28 19:37:29 -0800356static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
357 struct nlattr *rta)
358{
359 struct xfrm_algo_aead *p, *ualg;
360 struct xfrm_algo_desc *algo;
361
362 if (!rta)
363 return 0;
364
365 ualg = nla_data(rta);
366
367 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
368 if (!algo)
369 return -ENOSYS;
370 *props = algo->desc.sadb_alg_id;
371
372 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
373 if (!p)
374 return -ENOMEM;
375
376 strcpy(p->alg_name, algo->name);
377 *algpp = p;
378 return 0;
379}
380
Steffen Klasserte2b19122011-03-28 19:47:30 +0000381static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
382 struct nlattr *rp)
383{
384 struct xfrm_replay_state_esn *up;
Mathias Krauseecd79182012-09-20 10:01:49 +0000385 int ulen;
Steffen Klasserte2b19122011-03-28 19:47:30 +0000386
387 if (!replay_esn || !rp)
388 return 0;
389
390 up = nla_data(rp);
Mathias Krauseecd79182012-09-20 10:01:49 +0000391 ulen = xfrm_replay_state_esn_len(up);
Steffen Klasserte2b19122011-03-28 19:47:30 +0000392
Mathias Krauseecd79182012-09-20 10:01:49 +0000393 if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
Steffen Klasserte2b19122011-03-28 19:47:30 +0000394 return -EINVAL;
395
396 return 0;
397}
398
Steffen Klassertd8647b72011-03-08 00:10:27 +0000399static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
400 struct xfrm_replay_state_esn **preplay_esn,
401 struct nlattr *rta)
402{
403 struct xfrm_replay_state_esn *p, *pp, *up;
Mathias Krauseecd79182012-09-20 10:01:49 +0000404 int klen, ulen;
Steffen Klassertd8647b72011-03-08 00:10:27 +0000405
406 if (!rta)
407 return 0;
408
409 up = nla_data(rta);
Mathias Krauseecd79182012-09-20 10:01:49 +0000410 klen = xfrm_replay_state_esn_len(up);
411 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
Steffen Klassertd8647b72011-03-08 00:10:27 +0000412
Mathias Krauseecd79182012-09-20 10:01:49 +0000413 p = kzalloc(klen, GFP_KERNEL);
Steffen Klassertd8647b72011-03-08 00:10:27 +0000414 if (!p)
415 return -ENOMEM;
416
Mathias Krauseecd79182012-09-20 10:01:49 +0000417 pp = kzalloc(klen, GFP_KERNEL);
Steffen Klassertd8647b72011-03-08 00:10:27 +0000418 if (!pp) {
419 kfree(p);
420 return -ENOMEM;
421 }
422
Mathias Krauseecd79182012-09-20 10:01:49 +0000423 memcpy(p, up, ulen);
424 memcpy(pp, up, ulen);
425
Steffen Klassertd8647b72011-03-08 00:10:27 +0000426 *replay_esn = p;
427 *preplay_esn = pp;
428
429 return 0;
430}
431
Joy Latten661697f2007-04-13 16:14:35 -0700432static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
Trent Jaegerdf718372005-12-13 23:12:27 -0800433{
Trent Jaegerdf718372005-12-13 23:12:27 -0800434 int len = 0;
435
436 if (xfrm_ctx) {
437 len += sizeof(struct xfrm_user_sec_ctx);
438 len += xfrm_ctx->ctx_len;
439 }
440 return len;
441}
442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
444{
445 memcpy(&x->id, &p->id, sizeof(x->id));
446 memcpy(&x->sel, &p->sel, sizeof(x->sel));
447 memcpy(&x->lft, &p->lft, sizeof(x->lft));
448 x->props.mode = p->mode;
449 x->props.replay_window = p->replay_window;
450 x->props.reqid = p->reqid;
451 x->props.family = p->family;
David S. Miller54489c142006-10-27 15:29:47 -0700452 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 x->props.flags = p->flags;
Herbert Xu196b0032007-07-31 02:04:32 -0700454
Steffen Klassertccf9b3b2008-07-10 16:55:37 -0700455 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
Herbert Xu196b0032007-07-31 02:04:32 -0700456 x->sel.family = p->family;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457}
458
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800459/*
460 * someday when pfkey also has support, we could have the code
461 * somehow made shareable and move it to xfrm_state.c - JHS
462 *
463*/
Mathias Krausee3ac1042012-09-19 11:33:43 +0000464static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
465 int update_esn)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800466{
Thomas Graf5424f322007-08-22 14:01:33 -0700467 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
Mathias Krausee3ac1042012-09-19 11:33:43 +0000468 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
Thomas Graf5424f322007-08-22 14:01:33 -0700469 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
470 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
471 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800472
Steffen Klassertd8647b72011-03-08 00:10:27 +0000473 if (re) {
474 struct xfrm_replay_state_esn *replay_esn;
475 replay_esn = nla_data(re);
476 memcpy(x->replay_esn, replay_esn,
477 xfrm_replay_state_esn_len(replay_esn));
478 memcpy(x->preplay_esn, replay_esn,
479 xfrm_replay_state_esn_len(replay_esn));
480 }
481
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800482 if (rp) {
483 struct xfrm_replay_state *replay;
Thomas Graf5424f322007-08-22 14:01:33 -0700484 replay = nla_data(rp);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800485 memcpy(&x->replay, replay, sizeof(*replay));
486 memcpy(&x->preplay, replay, sizeof(*replay));
487 }
488
489 if (lt) {
490 struct xfrm_lifetime_cur *ltime;
Thomas Graf5424f322007-08-22 14:01:33 -0700491 ltime = nla_data(lt);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800492 x->curlft.bytes = ltime->bytes;
493 x->curlft.packets = ltime->packets;
494 x->curlft.add_time = ltime->add_time;
495 x->curlft.use_time = ltime->use_time;
496 }
497
Thomas Grafcf5cb792007-08-22 13:59:04 -0700498 if (et)
Thomas Graf5424f322007-08-22 14:01:33 -0700499 x->replay_maxage = nla_get_u32(et);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800500
Thomas Grafcf5cb792007-08-22 13:59:04 -0700501 if (rt)
Thomas Graf5424f322007-08-22 14:01:33 -0700502 x->replay_maxdiff = nla_get_u32(rt);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800503}
504
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800505static struct xfrm_state *xfrm_state_construct(struct net *net,
506 struct xfrm_usersa_info *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700507 struct nlattr **attrs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 int *errp)
509{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800510 struct xfrm_state *x = xfrm_state_alloc(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 int err = -ENOMEM;
512
513 if (!x)
514 goto error_no_put;
515
516 copy_from_user_state(x, p);
517
Herbert Xu1a6509d2008-01-28 19:37:29 -0800518 if ((err = attach_aead(&x->aead, &x->props.ealgo,
519 attrs[XFRMA_ALG_AEAD])))
520 goto error;
Martin Willi4447bb32009-11-25 00:29:52 +0000521 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
522 attrs[XFRMA_ALG_AUTH_TRUNC])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 goto error;
Martin Willi4447bb32009-11-25 00:29:52 +0000524 if (!x->props.aalgo) {
525 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
526 attrs[XFRMA_ALG_AUTH])))
527 goto error;
528 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
530 xfrm_ealg_get_byname,
Thomas Graf35a7aa02007-08-22 14:00:40 -0700531 attrs[XFRMA_ALG_CRYPT])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 goto error;
533 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
534 xfrm_calg_get_byname,
Thomas Graf35a7aa02007-08-22 14:00:40 -0700535 attrs[XFRMA_ALG_COMP])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 goto error;
Thomas Graffd211502007-09-06 03:28:08 -0700537
538 if (attrs[XFRMA_ENCAP]) {
539 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
540 sizeof(*x->encap), GFP_KERNEL);
541 if (x->encap == NULL)
542 goto error;
543 }
544
Martin Willi35d28562010-12-08 04:37:49 +0000545 if (attrs[XFRMA_TFCPAD])
546 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
547
Thomas Graffd211502007-09-06 03:28:08 -0700548 if (attrs[XFRMA_COADDR]) {
549 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
550 sizeof(*x->coaddr), GFP_KERNEL);
551 if (x->coaddr == NULL)
552 goto error;
553 }
554
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000555 xfrm_mark_get(attrs, &x->mark);
556
Wei Yongjuna454f0c2011-03-21 18:08:28 -0700557 err = __xfrm_init_state(x, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 if (err)
559 goto error;
560
Thomas Graffd211502007-09-06 03:28:08 -0700561 if (attrs[XFRMA_SEC_CTX] &&
562 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
Trent Jaegerdf718372005-12-13 23:12:27 -0800563 goto error;
564
Steffen Klassertd8647b72011-03-08 00:10:27 +0000565 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
566 attrs[XFRMA_REPLAY_ESN_VAL])))
567 goto error;
568
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 x->km.seq = p->seq;
Alexey Dobriyanb27aead2008-11-25 18:00:48 -0800570 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800571 /* sysctl_xfrm_aevent_etime is in 100ms units */
Alexey Dobriyanb27aead2008-11-25 18:00:48 -0800572 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800573
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000574 if ((err = xfrm_init_replay(x)))
575 goto error;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800576
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000577 /* override default values from above */
Mathias Krausee3ac1042012-09-19 11:33:43 +0000578 xfrm_update_ae_params(x, attrs, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
580 return x;
581
582error:
583 x->km.state = XFRM_STATE_DEAD;
584 xfrm_state_put(x);
585error_no_put:
586 *errp = err;
587 return NULL;
588}
589
Christoph Hellwig22e70052007-01-02 15:22:30 -0800590static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700591 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800593 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -0700594 struct xfrm_usersa_info *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 struct xfrm_state *x;
596 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700597 struct km_event c;
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700598 kuid_t loginuid = audit_get_loginuid(current);
Patrick McHardyc53fa1e2011-03-03 10:55:40 -0800599 u32 sessionid = audit_get_sessionid(current);
600 u32 sid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
Thomas Graf35a7aa02007-08-22 14:00:40 -0700602 err = verify_newsa_info(p, attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 if (err)
604 return err;
605
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800606 x = xfrm_state_construct(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 if (!x)
608 return err;
609
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700610 xfrm_state_hold(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
612 err = xfrm_state_add(x);
613 else
614 err = xfrm_state_update(x);
615
Patrick McHardyc53fa1e2011-03-03 10:55:40 -0800616 security_task_getsecid(current, &sid);
Eric Paris25323862008-04-18 10:09:25 -0400617 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -0600618
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 if (err < 0) {
620 x->km.state = XFRM_STATE_DEAD;
Herbert Xu21380b82006-02-22 14:47:13 -0800621 __xfrm_state_put(x);
Patrick McHardy7d6dfe12005-06-18 22:45:31 -0700622 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 }
624
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700625 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000626 c.portid = nlh->nlmsg_pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -0700627 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700628
629 km_state_notify(x, &c);
Patrick McHardy7d6dfe12005-06-18 22:45:31 -0700630out:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700631 xfrm_state_put(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 return err;
633}
634
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800635static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
636 struct xfrm_usersa_id *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700637 struct nlattr **attrs,
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700638 int *errp)
639{
640 struct xfrm_state *x = NULL;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000641 struct xfrm_mark m;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700642 int err;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000643 u32 mark = xfrm_mark_get(attrs, &m);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700644
645 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
646 err = -ESRCH;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000647 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700648 } else {
649 xfrm_address_t *saddr = NULL;
650
Thomas Graf35a7aa02007-08-22 14:00:40 -0700651 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700652 if (!saddr) {
653 err = -EINVAL;
654 goto out;
655 }
656
Masahide NAKAMURA9abbffe2006-11-24 20:34:51 -0800657 err = -ESRCH;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000658 x = xfrm_state_lookup_byaddr(net, mark,
659 &p->daddr, saddr,
Alexey Dobriyan221df1e2008-11-25 17:30:50 -0800660 p->proto, p->family);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700661 }
662
663 out:
664 if (!x && errp)
665 *errp = err;
666 return x;
667}
668
Christoph Hellwig22e70052007-01-02 15:22:30 -0800669static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700670 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800672 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 struct xfrm_state *x;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700674 int err = -ESRCH;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700675 struct km_event c;
Thomas Graf7b67c852007-08-22 13:53:52 -0700676 struct xfrm_usersa_id *p = nlmsg_data(nlh);
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700677 kuid_t loginuid = audit_get_loginuid(current);
Patrick McHardyc53fa1e2011-03-03 10:55:40 -0800678 u32 sessionid = audit_get_sessionid(current);
679 u32 sid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800681 x = xfrm_user_state_lookup(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 if (x == NULL)
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700683 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
David S. Miller6f68dc32006-06-08 23:58:52 -0700685 if ((err = security_xfrm_state_delete(x)) != 0)
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700686 goto out;
687
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 if (xfrm_state_kern(x)) {
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700689 err = -EPERM;
690 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 }
692
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700693 err = xfrm_state_delete(x);
Joy Latten161a09e2006-11-27 13:11:54 -0600694
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700695 if (err < 0)
696 goto out;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700697
698 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000699 c.portid = nlh->nlmsg_pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -0700700 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700701 km_state_notify(x, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700703out:
Patrick McHardyc53fa1e2011-03-03 10:55:40 -0800704 security_task_getsecid(current, &sid);
Eric Paris25323862008-04-18 10:09:25 -0400705 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700706 xfrm_state_put(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700707 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708}
709
710static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
711{
Mathias Krausef778a632012-09-19 11:33:39 +0000712 memset(p, 0, sizeof(*p));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 memcpy(&p->id, &x->id, sizeof(p->id));
714 memcpy(&p->sel, &x->sel, sizeof(p->sel));
715 memcpy(&p->lft, &x->lft, sizeof(p->lft));
716 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
717 memcpy(&p->stats, &x->stats, sizeof(p->stats));
David S. Miller54489c142006-10-27 15:29:47 -0700718 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 p->mode = x->props.mode;
720 p->replay_window = x->props.replay_window;
721 p->reqid = x->props.reqid;
722 p->family = x->props.family;
723 p->flags = x->props.flags;
724 p->seq = x->km.seq;
725}
726
727struct xfrm_dump_info {
728 struct sk_buff *in_skb;
729 struct sk_buff *out_skb;
730 u32 nlmsg_seq;
731 u16 nlmsg_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732};
733
Thomas Grafc0144be2007-08-22 13:55:43 -0700734static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
735{
Thomas Grafc0144be2007-08-22 13:55:43 -0700736 struct xfrm_user_sec_ctx *uctx;
737 struct nlattr *attr;
Herbert Xu68325d32007-10-09 13:30:57 -0700738 int ctx_size = sizeof(*uctx) + s->ctx_len;
Thomas Grafc0144be2007-08-22 13:55:43 -0700739
740 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
741 if (attr == NULL)
742 return -EMSGSIZE;
743
744 uctx = nla_data(attr);
745 uctx->exttype = XFRMA_SEC_CTX;
746 uctx->len = ctx_size;
747 uctx->ctx_doi = s->ctx_doi;
748 uctx->ctx_alg = s->ctx_alg;
749 uctx->ctx_len = s->ctx_len;
750 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
751
752 return 0;
753}
754
Martin Willi4447bb32009-11-25 00:29:52 +0000755static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
756{
757 struct xfrm_algo *algo;
758 struct nlattr *nla;
759
760 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
761 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
762 if (!nla)
763 return -EMSGSIZE;
764
765 algo = nla_data(nla);
Mathias Krause4c873082012-09-19 11:33:38 +0000766 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
Martin Willi4447bb32009-11-25 00:29:52 +0000767 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
768 algo->alg_key_len = auth->alg_key_len;
769
770 return 0;
771}
772
Herbert Xu68325d32007-10-09 13:30:57 -0700773/* Don't change this without updating xfrm_sa_len! */
774static int copy_to_user_state_extra(struct xfrm_state *x,
775 struct xfrm_usersa_info *p,
776 struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777{
David S. Miller1d1e34d2012-06-27 21:57:03 -0700778 int ret = 0;
779
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 copy_to_user_state(x, p);
781
David S. Miller1d1e34d2012-06-27 21:57:03 -0700782 if (x->coaddr) {
783 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
784 if (ret)
785 goto out;
786 }
787 if (x->lastused) {
788 ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused);
789 if (ret)
790 goto out;
791 }
792 if (x->aead) {
793 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
794 if (ret)
795 goto out;
796 }
797 if (x->aalg) {
798 ret = copy_to_user_auth(x->aalg, skb);
799 if (!ret)
800 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
801 xfrm_alg_auth_len(x->aalg), x->aalg);
802 if (ret)
803 goto out;
804 }
805 if (x->ealg) {
806 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
807 if (ret)
808 goto out;
809 }
810 if (x->calg) {
811 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
812 if (ret)
813 goto out;
814 }
815 if (x->encap) {
816 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
817 if (ret)
818 goto out;
819 }
820 if (x->tfcpad) {
821 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
822 if (ret)
823 goto out;
824 }
825 ret = xfrm_mark_put(skb, &x->mark);
826 if (ret)
827 goto out;
828 if (x->replay_esn) {
829 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
830 xfrm_replay_state_esn_len(x->replay_esn),
831 x->replay_esn);
832 if (ret)
833 goto out;
834 }
835 if (x->security)
836 ret = copy_sec_ctx(x->security, skb);
837out:
838 return ret;
Herbert Xu68325d32007-10-09 13:30:57 -0700839}
840
841static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
842{
843 struct xfrm_dump_info *sp = ptr;
844 struct sk_buff *in_skb = sp->in_skb;
845 struct sk_buff *skb = sp->out_skb;
846 struct xfrm_usersa_info *p;
847 struct nlmsghdr *nlh;
848 int err;
849
Eric W. Biederman15e47302012-09-07 20:12:54 +0000850 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
Herbert Xu68325d32007-10-09 13:30:57 -0700851 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
852 if (nlh == NULL)
853 return -EMSGSIZE;
854
855 p = nlmsg_data(nlh);
856
857 err = copy_to_user_state_extra(x, p, skb);
David S. Miller1d1e34d2012-06-27 21:57:03 -0700858 if (err) {
859 nlmsg_cancel(skb, nlh);
860 return err;
861 }
Thomas Graf98250692007-08-22 12:47:26 -0700862 nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864}
865
Timo Teras4c563f72008-02-28 21:31:08 -0800866static int xfrm_dump_sa_done(struct netlink_callback *cb)
867{
868 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
869 xfrm_state_walk_done(walk);
870 return 0;
871}
872
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
874{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800875 struct net *net = sock_net(skb->sk);
Timo Teras4c563f72008-02-28 21:31:08 -0800876 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 struct xfrm_dump_info info;
878
Timo Teras4c563f72008-02-28 21:31:08 -0800879 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
880 sizeof(cb->args) - sizeof(cb->args[0]));
881
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 info.in_skb = cb->skb;
883 info.out_skb = skb;
884 info.nlmsg_seq = cb->nlh->nlmsg_seq;
885 info.nlmsg_flags = NLM_F_MULTI;
Timo Teras4c563f72008-02-28 21:31:08 -0800886
887 if (!cb->args[0]) {
888 cb->args[0] = 1;
889 xfrm_state_walk_init(walk, 0);
890 }
891
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800892 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893
894 return skb->len;
895}
896
897static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
898 struct xfrm_state *x, u32 seq)
899{
900 struct xfrm_dump_info info;
901 struct sk_buff *skb;
Mathias Krause864745d2012-09-13 11:41:26 +0000902 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903
Thomas Graf7deb2262007-08-22 13:57:39 -0700904 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 if (!skb)
906 return ERR_PTR(-ENOMEM);
907
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 info.in_skb = in_skb;
909 info.out_skb = skb;
910 info.nlmsg_seq = seq;
911 info.nlmsg_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912
Mathias Krause864745d2012-09-13 11:41:26 +0000913 err = dump_one_state(x, 0, &info);
914 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 kfree_skb(skb);
Mathias Krause864745d2012-09-13 11:41:26 +0000916 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 }
918
919 return skb;
920}
921
Thomas Graf7deb2262007-08-22 13:57:39 -0700922static inline size_t xfrm_spdinfo_msgsize(void)
923{
924 return NLMSG_ALIGN(4)
925 + nla_total_size(sizeof(struct xfrmu_spdinfo))
926 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
927}
928
Alexey Dobriyane0710412010-01-23 13:37:10 +0000929static int build_spdinfo(struct sk_buff *skb, struct net *net,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000930 u32 portid, u32 seq, u32 flags)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700931{
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -0700932 struct xfrmk_spdinfo si;
933 struct xfrmu_spdinfo spc;
934 struct xfrmu_spdhinfo sph;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700935 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -0700936 int err;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700937 u32 *f;
938
Eric W. Biederman15e47302012-09-07 20:12:54 +0000939 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300940 if (nlh == NULL) /* shouldn't really happen ... */
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700941 return -EMSGSIZE;
942
943 f = nlmsg_data(nlh);
944 *f = flags;
Alexey Dobriyane0710412010-01-23 13:37:10 +0000945 xfrm_spd_getinfo(net, &si);
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -0700946 spc.incnt = si.incnt;
947 spc.outcnt = si.outcnt;
948 spc.fwdcnt = si.fwdcnt;
949 spc.inscnt = si.inscnt;
950 spc.outscnt = si.outscnt;
951 spc.fwdscnt = si.fwdscnt;
952 sph.spdhcnt = si.spdhcnt;
953 sph.spdhmcnt = si.spdhmcnt;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700954
David S. Miller1d1e34d2012-06-27 21:57:03 -0700955 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
956 if (!err)
957 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
958 if (err) {
959 nlmsg_cancel(skb, nlh);
960 return err;
961 }
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700962
963 return nlmsg_end(skb, nlh);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700964}
965
966static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700967 struct nlattr **attrs)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700968{
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800969 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700970 struct sk_buff *r_skb;
Thomas Graf7b67c852007-08-22 13:53:52 -0700971 u32 *flags = nlmsg_data(nlh);
Eric W. Biederman15e47302012-09-07 20:12:54 +0000972 u32 sportid = NETLINK_CB(skb).portid;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700973 u32 seq = nlh->nlmsg_seq;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700974
Thomas Graf7deb2262007-08-22 13:57:39 -0700975 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700976 if (r_skb == NULL)
977 return -ENOMEM;
978
Eric W. Biederman15e47302012-09-07 20:12:54 +0000979 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700980 BUG();
981
Eric W. Biederman15e47302012-09-07 20:12:54 +0000982 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700983}
984
Thomas Graf7deb2262007-08-22 13:57:39 -0700985static inline size_t xfrm_sadinfo_msgsize(void)
986{
987 return NLMSG_ALIGN(4)
988 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
989 + nla_total_size(4); /* XFRMA_SAD_CNT */
990}
991
Alexey Dobriyane0710412010-01-23 13:37:10 +0000992static int build_sadinfo(struct sk_buff *skb, struct net *net,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000993 u32 portid, u32 seq, u32 flags)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700994{
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -0700995 struct xfrmk_sadinfo si;
996 struct xfrmu_sadhinfo sh;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700997 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -0700998 int err;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700999 u32 *f;
1000
Eric W. Biederman15e47302012-09-07 20:12:54 +00001001 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001002 if (nlh == NULL) /* shouldn't really happen ... */
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001003 return -EMSGSIZE;
1004
1005 f = nlmsg_data(nlh);
1006 *f = flags;
Alexey Dobriyane0710412010-01-23 13:37:10 +00001007 xfrm_sad_getinfo(net, &si);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001008
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -07001009 sh.sadhmcnt = si.sadhmcnt;
1010 sh.sadhcnt = si.sadhcnt;
1011
David S. Miller1d1e34d2012-06-27 21:57:03 -07001012 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1013 if (!err)
1014 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1015 if (err) {
1016 nlmsg_cancel(skb, nlh);
1017 return err;
1018 }
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001019
1020 return nlmsg_end(skb, nlh);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001021}
1022
1023static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001024 struct nlattr **attrs)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001025{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001026 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001027 struct sk_buff *r_skb;
Thomas Graf7b67c852007-08-22 13:53:52 -07001028 u32 *flags = nlmsg_data(nlh);
Eric W. Biederman15e47302012-09-07 20:12:54 +00001029 u32 sportid = NETLINK_CB(skb).portid;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001030 u32 seq = nlh->nlmsg_seq;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001031
Thomas Graf7deb2262007-08-22 13:57:39 -07001032 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001033 if (r_skb == NULL)
1034 return -ENOMEM;
1035
Eric W. Biederman15e47302012-09-07 20:12:54 +00001036 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001037 BUG();
1038
Eric W. Biederman15e47302012-09-07 20:12:54 +00001039 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001040}
1041
Christoph Hellwig22e70052007-01-02 15:22:30 -08001042static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001043 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001045 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -07001046 struct xfrm_usersa_id *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 struct xfrm_state *x;
1048 struct sk_buff *resp_skb;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001049 int err = -ESRCH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001051 x = xfrm_user_state_lookup(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 if (x == NULL)
1053 goto out_noput;
1054
1055 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1056 if (IS_ERR(resp_skb)) {
1057 err = PTR_ERR(resp_skb);
1058 } else {
Eric W. Biederman15e47302012-09-07 20:12:54 +00001059 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 }
1061 xfrm_state_put(x);
1062out_noput:
1063 return err;
1064}
1065
1066static int verify_userspi_info(struct xfrm_userspi_info *p)
1067{
1068 switch (p->info.id.proto) {
1069 case IPPROTO_AH:
1070 case IPPROTO_ESP:
1071 break;
1072
1073 case IPPROTO_COMP:
1074 /* IPCOMP spi is 16-bits. */
1075 if (p->max >= 0x10000)
1076 return -EINVAL;
1077 break;
1078
1079 default:
1080 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001081 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082
1083 if (p->min > p->max)
1084 return -EINVAL;
1085
1086 return 0;
1087}
1088
Christoph Hellwig22e70052007-01-02 15:22:30 -08001089static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001090 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001092 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 struct xfrm_state *x;
1094 struct xfrm_userspi_info *p;
1095 struct sk_buff *resp_skb;
1096 xfrm_address_t *daddr;
1097 int family;
1098 int err;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001099 u32 mark;
1100 struct xfrm_mark m;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101
Thomas Graf7b67c852007-08-22 13:53:52 -07001102 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 err = verify_userspi_info(p);
1104 if (err)
1105 goto out_noput;
1106
1107 family = p->info.family;
1108 daddr = &p->info.id.daddr;
1109
1110 x = NULL;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001111
1112 mark = xfrm_mark_get(attrs, &m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 if (p->info.seq) {
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001114 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
YOSHIFUJI Hideaki / 吉藤英明70e94e62013-01-29 12:48:50 +00001115 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 xfrm_state_put(x);
1117 x = NULL;
1118 }
1119 }
1120
1121 if (!x)
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001122 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 p->info.id.proto, daddr,
1124 &p->info.saddr, 1,
1125 family);
1126 err = -ENOENT;
1127 if (x == NULL)
1128 goto out_noput;
1129
Herbert Xu658b2192007-10-09 13:29:52 -07001130 err = xfrm_alloc_spi(x, p->min, p->max);
1131 if (err)
1132 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
Herbert Xu658b2192007-10-09 13:29:52 -07001134 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 if (IS_ERR(resp_skb)) {
1136 err = PTR_ERR(resp_skb);
1137 goto out;
1138 }
1139
Eric W. Biederman15e47302012-09-07 20:12:54 +00001140 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141
1142out:
1143 xfrm_state_put(x);
1144out_noput:
1145 return err;
1146}
1147
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001148static int verify_policy_dir(u8 dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149{
1150 switch (dir) {
1151 case XFRM_POLICY_IN:
1152 case XFRM_POLICY_OUT:
1153 case XFRM_POLICY_FWD:
1154 break;
1155
1156 default:
1157 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001158 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159
1160 return 0;
1161}
1162
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001163static int verify_policy_type(u8 type)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001164{
1165 switch (type) {
1166 case XFRM_POLICY_TYPE_MAIN:
1167#ifdef CONFIG_XFRM_SUB_POLICY
1168 case XFRM_POLICY_TYPE_SUB:
1169#endif
1170 break;
1171
1172 default:
1173 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001174 }
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001175
1176 return 0;
1177}
1178
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1180{
1181 switch (p->share) {
1182 case XFRM_SHARE_ANY:
1183 case XFRM_SHARE_SESSION:
1184 case XFRM_SHARE_USER:
1185 case XFRM_SHARE_UNIQUE:
1186 break;
1187
1188 default:
1189 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001190 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191
1192 switch (p->action) {
1193 case XFRM_POLICY_ALLOW:
1194 case XFRM_POLICY_BLOCK:
1195 break;
1196
1197 default:
1198 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001199 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
1201 switch (p->sel.family) {
1202 case AF_INET:
1203 break;
1204
1205 case AF_INET6:
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001206#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 break;
1208#else
1209 return -EAFNOSUPPORT;
1210#endif
1211
1212 default:
1213 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001214 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215
1216 return verify_policy_dir(p->dir);
1217}
1218
Thomas Graf5424f322007-08-22 14:01:33 -07001219static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
Trent Jaegerdf718372005-12-13 23:12:27 -08001220{
Thomas Graf5424f322007-08-22 14:01:33 -07001221 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Trent Jaegerdf718372005-12-13 23:12:27 -08001222 struct xfrm_user_sec_ctx *uctx;
1223
1224 if (!rt)
1225 return 0;
1226
Thomas Graf5424f322007-08-22 14:01:33 -07001227 uctx = nla_data(rt);
Paul Moore03e1ad72008-04-12 19:07:52 -07001228 return security_xfrm_policy_alloc(&pol->security, uctx);
Trent Jaegerdf718372005-12-13 23:12:27 -08001229}
1230
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1232 int nr)
1233{
1234 int i;
1235
1236 xp->xfrm_nr = nr;
1237 for (i = 0; i < nr; i++, ut++) {
1238 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1239
1240 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1241 memcpy(&t->saddr, &ut->saddr,
1242 sizeof(xfrm_address_t));
1243 t->reqid = ut->reqid;
1244 t->mode = ut->mode;
1245 t->share = ut->share;
1246 t->optional = ut->optional;
1247 t->aalgos = ut->aalgos;
1248 t->ealgos = ut->ealgos;
1249 t->calgos = ut->calgos;
Herbert Xuc5d18e92008-04-22 00:46:42 -07001250 /* If all masks are ~0, then we allow all algorithms. */
1251 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
Miika Komu8511d012006-11-30 16:40:51 -08001252 t->encap_family = ut->family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 }
1254}
1255
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001256static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1257{
1258 int i;
1259
1260 if (nr > XFRM_MAX_DEPTH)
1261 return -EINVAL;
1262
1263 for (i = 0; i < nr; i++) {
1264 /* We never validated the ut->family value, so many
1265 * applications simply leave it at zero. The check was
1266 * never made and ut->family was ignored because all
1267 * templates could be assumed to have the same family as
1268 * the policy itself. Now that we will have ipv4-in-ipv6
1269 * and ipv6-in-ipv4 tunnels, this is no longer true.
1270 */
1271 if (!ut[i].family)
1272 ut[i].family = family;
1273
1274 switch (ut[i].family) {
1275 case AF_INET:
1276 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001277#if IS_ENABLED(CONFIG_IPV6)
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001278 case AF_INET6:
1279 break;
1280#endif
1281 default:
1282 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001283 }
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001284 }
1285
1286 return 0;
1287}
1288
Thomas Graf5424f322007-08-22 14:01:33 -07001289static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290{
Thomas Graf5424f322007-08-22 14:01:33 -07001291 struct nlattr *rt = attrs[XFRMA_TMPL];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292
1293 if (!rt) {
1294 pol->xfrm_nr = 0;
1295 } else {
Thomas Graf5424f322007-08-22 14:01:33 -07001296 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1297 int nr = nla_len(rt) / sizeof(*utmpl);
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001298 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001300 err = validate_tmpl(nr, utmpl, pol->family);
1301 if (err)
1302 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303
Thomas Graf5424f322007-08-22 14:01:33 -07001304 copy_templates(pol, utmpl, nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 }
1306 return 0;
1307}
1308
Thomas Graf5424f322007-08-22 14:01:33 -07001309static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001310{
Thomas Graf5424f322007-08-22 14:01:33 -07001311 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001312 struct xfrm_userpolicy_type *upt;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001313 u8 type = XFRM_POLICY_TYPE_MAIN;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001314 int err;
1315
1316 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001317 upt = nla_data(rt);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001318 type = upt->type;
1319 }
1320
1321 err = verify_policy_type(type);
1322 if (err)
1323 return err;
1324
1325 *tp = type;
1326 return 0;
1327}
1328
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1330{
1331 xp->priority = p->priority;
1332 xp->index = p->index;
1333 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1334 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1335 xp->action = p->action;
1336 xp->flags = p->flags;
1337 xp->family = p->sel.family;
1338 /* XXX xp->share = p->share; */
1339}
1340
1341static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1342{
Mathias Krause7b789832012-09-19 11:33:40 +00001343 memset(p, 0, sizeof(*p));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1345 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1346 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1347 p->priority = xp->priority;
1348 p->index = xp->index;
1349 p->sel.family = xp->family;
1350 p->dir = dir;
1351 p->action = xp->action;
1352 p->flags = xp->flags;
1353 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1354}
1355
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001356static 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 -07001357{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001358 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359 int err;
1360
1361 if (!xp) {
1362 *errp = -ENOMEM;
1363 return NULL;
1364 }
1365
1366 copy_from_user_policy(xp, p);
Trent Jaegerdf718372005-12-13 23:12:27 -08001367
Thomas Graf35a7aa02007-08-22 14:00:40 -07001368 err = copy_from_user_policy_type(&xp->type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001369 if (err)
1370 goto error;
1371
Thomas Graf35a7aa02007-08-22 14:00:40 -07001372 if (!(err = copy_from_user_tmpl(xp, attrs)))
1373 err = copy_from_user_sec_ctx(xp, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001374 if (err)
1375 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001377 xfrm_mark_get(attrs, &xp->mark);
1378
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 return xp;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001380 error:
1381 *errp = err;
Herbert Xu12a169e2008-10-01 07:03:24 -07001382 xp->walk.dead = 1;
WANG Cong64c31b32008-01-07 22:34:29 -08001383 xfrm_policy_destroy(xp);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001384 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385}
1386
Christoph Hellwig22e70052007-01-02 15:22:30 -08001387static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001388 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001390 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -07001391 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 struct xfrm_policy *xp;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001393 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 int err;
1395 int excl;
Eric W. Biedermane1760bd2012-09-10 22:39:43 -07001396 kuid_t loginuid = audit_get_loginuid(current);
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001397 u32 sessionid = audit_get_sessionid(current);
1398 u32 sid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399
1400 err = verify_newpolicy_info(p);
1401 if (err)
1402 return err;
Thomas Graf35a7aa02007-08-22 14:00:40 -07001403 err = verify_sec_ctx_len(attrs);
Trent Jaegerdf718372005-12-13 23:12:27 -08001404 if (err)
1405 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001407 xp = xfrm_policy_construct(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 if (!xp)
1409 return err;
1410
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001411 /* shouldn't excl be based on nlh flags??
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001412 * Aha! this is anti-netlink really i.e more pfkey derived
1413 * in netlink excl is a flag and you wouldnt need
1414 * a type XFRM_MSG_UPDPOLICY - JHS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1416 err = xfrm_policy_insert(p->dir, xp, excl);
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001417 security_task_getsecid(current, &sid);
Eric Paris25323862008-04-18 10:09:25 -04001418 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -06001419
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 if (err) {
Paul Moore03e1ad72008-04-12 19:07:52 -07001421 security_xfrm_policy_free(xp->security);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422 kfree(xp);
1423 return err;
1424 }
1425
Herbert Xuf60f6b82005-06-18 22:44:37 -07001426 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001427 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001428 c.portid = nlh->nlmsg_pid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001429 km_policy_notify(xp, p->dir, &c);
1430
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 xfrm_pol_put(xp);
1432
1433 return 0;
1434}
1435
1436static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1437{
1438 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1439 int i;
1440
1441 if (xp->xfrm_nr == 0)
1442 return 0;
1443
1444 for (i = 0; i < xp->xfrm_nr; i++) {
1445 struct xfrm_user_tmpl *up = &vec[i];
1446 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1447
Mathias Krause1f868402012-09-19 11:33:41 +00001448 memset(up, 0, sizeof(*up));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 memcpy(&up->id, &kp->id, sizeof(up->id));
Miika Komu8511d012006-11-30 16:40:51 -08001450 up->family = kp->encap_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1452 up->reqid = kp->reqid;
1453 up->mode = kp->mode;
1454 up->share = kp->share;
1455 up->optional = kp->optional;
1456 up->aalgos = kp->aalgos;
1457 up->ealgos = kp->ealgos;
1458 up->calgos = kp->calgos;
1459 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460
Thomas Grafc0144be2007-08-22 13:55:43 -07001461 return nla_put(skb, XFRMA_TMPL,
1462 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
Trent Jaegerdf718372005-12-13 23:12:27 -08001463}
1464
Serge Hallyn0d681622006-07-24 23:30:44 -07001465static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1466{
1467 if (x->security) {
1468 return copy_sec_ctx(x->security, skb);
1469 }
1470 return 0;
1471}
1472
1473static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1474{
David S. Miller1d1e34d2012-06-27 21:57:03 -07001475 if (xp->security)
Serge Hallyn0d681622006-07-24 23:30:44 -07001476 return copy_sec_ctx(xp->security, skb);
Serge Hallyn0d681622006-07-24 23:30:44 -07001477 return 0;
1478}
Thomas Grafcfbfd452007-08-22 13:57:04 -07001479static inline size_t userpolicy_type_attrsize(void)
1480{
1481#ifdef CONFIG_XFRM_SUB_POLICY
1482 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1483#else
1484 return 0;
1485#endif
1486}
Serge Hallyn0d681622006-07-24 23:30:44 -07001487
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001488#ifdef CONFIG_XFRM_SUB_POLICY
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001489static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001490{
Thomas Grafc0144be2007-08-22 13:55:43 -07001491 struct xfrm_userpolicy_type upt = {
1492 .type = type,
1493 };
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001494
Thomas Grafc0144be2007-08-22 13:55:43 -07001495 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001496}
1497
1498#else
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001499static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001500{
1501 return 0;
1502}
1503#endif
1504
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1506{
1507 struct xfrm_dump_info *sp = ptr;
1508 struct xfrm_userpolicy_info *p;
1509 struct sk_buff *in_skb = sp->in_skb;
1510 struct sk_buff *skb = sp->out_skb;
1511 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07001512 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513
Eric W. Biederman15e47302012-09-07 20:12:54 +00001514 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
Thomas Graf79b8b7f2007-08-22 12:46:53 -07001515 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1516 if (nlh == NULL)
1517 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518
Thomas Graf7b67c852007-08-22 13:53:52 -07001519 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520 copy_to_user_policy(xp, p, dir);
David S. Miller1d1e34d2012-06-27 21:57:03 -07001521 err = copy_to_user_tmpl(xp, skb);
1522 if (!err)
1523 err = copy_to_user_sec_ctx(xp, skb);
1524 if (!err)
1525 err = copy_to_user_policy_type(xp->type, skb);
1526 if (!err)
1527 err = xfrm_mark_put(skb, &xp->mark);
1528 if (err) {
1529 nlmsg_cancel(skb, nlh);
1530 return err;
1531 }
Thomas Graf98250692007-08-22 12:47:26 -07001532 nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534}
1535
Timo Teras4c563f72008-02-28 21:31:08 -08001536static int xfrm_dump_policy_done(struct netlink_callback *cb)
1537{
1538 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1539
1540 xfrm_policy_walk_done(walk);
1541 return 0;
1542}
1543
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1545{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001546 struct net *net = sock_net(skb->sk);
Timo Teras4c563f72008-02-28 21:31:08 -08001547 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 struct xfrm_dump_info info;
1549
Timo Teras4c563f72008-02-28 21:31:08 -08001550 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1551 sizeof(cb->args) - sizeof(cb->args[0]));
1552
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553 info.in_skb = cb->skb;
1554 info.out_skb = skb;
1555 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1556 info.nlmsg_flags = NLM_F_MULTI;
Timo Teras4c563f72008-02-28 21:31:08 -08001557
1558 if (!cb->args[0]) {
1559 cb->args[0] = 1;
1560 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1561 }
1562
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001563 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564
1565 return skb->len;
1566}
1567
1568static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1569 struct xfrm_policy *xp,
1570 int dir, u32 seq)
1571{
1572 struct xfrm_dump_info info;
1573 struct sk_buff *skb;
Mathias Krausec2546372012-09-14 09:58:32 +00001574 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575
Thomas Graf7deb2262007-08-22 13:57:39 -07001576 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 if (!skb)
1578 return ERR_PTR(-ENOMEM);
1579
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 info.in_skb = in_skb;
1581 info.out_skb = skb;
1582 info.nlmsg_seq = seq;
1583 info.nlmsg_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584
Mathias Krausec2546372012-09-14 09:58:32 +00001585 err = dump_one_policy(xp, dir, 0, &info);
1586 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 kfree_skb(skb);
Mathias Krausec2546372012-09-14 09:58:32 +00001588 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589 }
1590
1591 return skb;
1592}
1593
Christoph Hellwig22e70052007-01-02 15:22:30 -08001594static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001595 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001597 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598 struct xfrm_policy *xp;
1599 struct xfrm_userpolicy_id *p;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001600 u8 type = XFRM_POLICY_TYPE_MAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001602 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603 int delete;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001604 struct xfrm_mark m;
1605 u32 mark = xfrm_mark_get(attrs, &m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606
Thomas Graf7b67c852007-08-22 13:53:52 -07001607 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1609
Thomas Graf35a7aa02007-08-22 14:00:40 -07001610 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001611 if (err)
1612 return err;
1613
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614 err = verify_policy_dir(p->dir);
1615 if (err)
1616 return err;
1617
1618 if (p->index)
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001619 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
Trent Jaegerdf718372005-12-13 23:12:27 -08001620 else {
Thomas Graf5424f322007-08-22 14:01:33 -07001621 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Paul Moore03e1ad72008-04-12 19:07:52 -07001622 struct xfrm_sec_ctx *ctx;
Trent Jaegerdf718372005-12-13 23:12:27 -08001623
Thomas Graf35a7aa02007-08-22 14:00:40 -07001624 err = verify_sec_ctx_len(attrs);
Trent Jaegerdf718372005-12-13 23:12:27 -08001625 if (err)
1626 return err;
1627
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001628 ctx = NULL;
Trent Jaegerdf718372005-12-13 23:12:27 -08001629 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001630 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
Trent Jaegerdf718372005-12-13 23:12:27 -08001631
Paul Moore03e1ad72008-04-12 19:07:52 -07001632 err = security_xfrm_policy_alloc(&ctx, uctx);
1633 if (err)
Trent Jaegerdf718372005-12-13 23:12:27 -08001634 return err;
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001635 }
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001636 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001637 ctx, delete, &err);
Paul Moore03e1ad72008-04-12 19:07:52 -07001638 security_xfrm_policy_free(ctx);
Trent Jaegerdf718372005-12-13 23:12:27 -08001639 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640 if (xp == NULL)
1641 return -ENOENT;
1642
1643 if (!delete) {
1644 struct sk_buff *resp_skb;
1645
1646 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1647 if (IS_ERR(resp_skb)) {
1648 err = PTR_ERR(resp_skb);
1649 } else {
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001650 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001651 NETLINK_CB(skb).portid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001653 } else {
Eric W. Biedermane1760bd2012-09-10 22:39:43 -07001654 kuid_t loginuid = audit_get_loginuid(current);
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001655 u32 sessionid = audit_get_sessionid(current);
1656 u32 sid;
Eric Paris25323862008-04-18 10:09:25 -04001657
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001658 security_task_getsecid(current, &sid);
Eric Paris25323862008-04-18 10:09:25 -04001659 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1660 sid);
David S. Miller13fcfbb02007-02-12 13:53:54 -08001661
1662 if (err != 0)
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001663 goto out;
David S. Miller13fcfbb02007-02-12 13:53:54 -08001664
Herbert Xue7443892005-06-18 22:44:18 -07001665 c.data.byid = p->index;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001666 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001667 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001668 c.portid = nlh->nlmsg_pid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001669 km_policy_notify(xp, p->dir, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670 }
1671
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001672out:
Eric Parisef41aaa2007-03-07 15:37:58 -08001673 xfrm_pol_put(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674 return err;
1675}
1676
Christoph Hellwig22e70052007-01-02 15:22:30 -08001677static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001678 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001680 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001681 struct km_event c;
Thomas Graf7b67c852007-08-22 13:53:52 -07001682 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
Joy Latten161a09e2006-11-27 13:11:54 -06001683 struct xfrm_audit audit_info;
Joy Latten4aa2e622007-06-04 19:05:57 -04001684 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001686 audit_info.loginuid = audit_get_loginuid(current);
1687 audit_info.sessionid = audit_get_sessionid(current);
1688 security_task_getsecid(current, &audit_info.secid);
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001689 err = xfrm_state_flush(net, p->proto, &audit_info);
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +00001690 if (err) {
1691 if (err == -ESRCH) /* empty table */
1692 return 0;
David S. Miller069c4742010-02-17 13:41:40 -08001693 return err;
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +00001694 }
Herbert Xubf088672005-06-18 22:44:00 -07001695 c.data.proto = p->proto;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001696 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001697 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001698 c.portid = nlh->nlmsg_pid;
Alexey Dobriyan70678022008-11-25 17:50:36 -08001699 c.net = net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001700 km_state_notify(NULL, &c);
1701
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702 return 0;
1703}
1704
Steffen Klassertd8647b72011-03-08 00:10:27 +00001705static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
Thomas Graf7deb2262007-08-22 13:57:39 -07001706{
Steffen Klassertd8647b72011-03-08 00:10:27 +00001707 size_t replay_size = x->replay_esn ?
1708 xfrm_replay_state_esn_len(x->replay_esn) :
1709 sizeof(struct xfrm_replay_state);
1710
Thomas Graf7deb2262007-08-22 13:57:39 -07001711 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
Steffen Klassertd8647b72011-03-08 00:10:27 +00001712 + nla_total_size(replay_size)
Thomas Graf7deb2262007-08-22 13:57:39 -07001713 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001714 + nla_total_size(sizeof(struct xfrm_mark))
Thomas Graf7deb2262007-08-22 13:57:39 -07001715 + nla_total_size(4) /* XFRM_AE_RTHR */
1716 + nla_total_size(4); /* XFRM_AE_ETHR */
1717}
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001718
David S. Miller214e0052011-02-24 00:02:38 -05001719static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001720{
1721 struct xfrm_aevent_id *id;
1722 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07001723 int err;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001724
Eric W. Biederman15e47302012-09-07 20:12:54 +00001725 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
Thomas Graf79b8b7f2007-08-22 12:46:53 -07001726 if (nlh == NULL)
1727 return -EMSGSIZE;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001728
Thomas Graf7b67c852007-08-22 13:53:52 -07001729 id = nlmsg_data(nlh);
Jamal Hadi Salim2b5f6dc2006-12-02 22:22:25 -08001730 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001731 id->sa_id.spi = x->id.spi;
1732 id->sa_id.family = x->props.family;
1733 id->sa_id.proto = x->id.proto;
Jamal Hadi Salim2b5f6dc2006-12-02 22:22:25 -08001734 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1735 id->reqid = x->props.reqid;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001736 id->flags = c->data.aevent;
1737
David S. Millerd0fde792012-03-29 04:02:26 -04001738 if (x->replay_esn) {
David S. Miller1d1e34d2012-06-27 21:57:03 -07001739 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1740 xfrm_replay_state_esn_len(x->replay_esn),
1741 x->replay_esn);
David S. Millerd0fde792012-03-29 04:02:26 -04001742 } else {
David S. Miller1d1e34d2012-06-27 21:57:03 -07001743 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1744 &x->replay);
David S. Millerd0fde792012-03-29 04:02:26 -04001745 }
David S. Miller1d1e34d2012-06-27 21:57:03 -07001746 if (err)
1747 goto out_cancel;
1748 err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
1749 if (err)
1750 goto out_cancel;
Steffen Klassertd8647b72011-03-08 00:10:27 +00001751
David S. Miller1d1e34d2012-06-27 21:57:03 -07001752 if (id->flags & XFRM_AE_RTHR) {
1753 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1754 if (err)
1755 goto out_cancel;
1756 }
1757 if (id->flags & XFRM_AE_ETHR) {
1758 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1759 x->replay_maxage * 10 / HZ);
1760 if (err)
1761 goto out_cancel;
1762 }
1763 err = xfrm_mark_put(skb, &x->mark);
1764 if (err)
1765 goto out_cancel;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001766
Thomas Graf98250692007-08-22 12:47:26 -07001767 return nlmsg_end(skb, nlh);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001768
David S. Miller1d1e34d2012-06-27 21:57:03 -07001769out_cancel:
Thomas Graf98250692007-08-22 12:47:26 -07001770 nlmsg_cancel(skb, nlh);
David S. Miller1d1e34d2012-06-27 21:57:03 -07001771 return err;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001772}
1773
Christoph Hellwig22e70052007-01-02 15:22:30 -08001774static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001775 struct nlattr **attrs)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001776{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001777 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001778 struct xfrm_state *x;
1779 struct sk_buff *r_skb;
1780 int err;
1781 struct km_event c;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001782 u32 mark;
1783 struct xfrm_mark m;
Thomas Graf7b67c852007-08-22 13:53:52 -07001784 struct xfrm_aevent_id *p = nlmsg_data(nlh);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001785 struct xfrm_usersa_id *id = &p->sa_id;
1786
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001787 mark = xfrm_mark_get(attrs, &m);
1788
1789 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
Steffen Klassertd8647b72011-03-08 00:10:27 +00001790 if (x == NULL)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001791 return -ESRCH;
Steffen Klassertd8647b72011-03-08 00:10:27 +00001792
1793 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1794 if (r_skb == NULL) {
1795 xfrm_state_put(x);
1796 return -ENOMEM;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001797 }
1798
1799 /*
1800 * XXX: is this lock really needed - none of the other
1801 * gets lock (the concern is things getting updated
1802 * while we are still reading) - jhs
1803 */
1804 spin_lock_bh(&x->lock);
1805 c.data.aevent = p->flags;
1806 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001807 c.portid = nlh->nlmsg_pid;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001808
1809 if (build_aevent(r_skb, x, &c) < 0)
1810 BUG();
Eric W. Biederman15e47302012-09-07 20:12:54 +00001811 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001812 spin_unlock_bh(&x->lock);
1813 xfrm_state_put(x);
1814 return err;
1815}
1816
Christoph Hellwig22e70052007-01-02 15:22:30 -08001817static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001818 struct nlattr **attrs)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001819{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001820 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001821 struct xfrm_state *x;
1822 struct km_event c;
1823 int err = - EINVAL;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001824 u32 mark = 0;
1825 struct xfrm_mark m;
Thomas Graf7b67c852007-08-22 13:53:52 -07001826 struct xfrm_aevent_id *p = nlmsg_data(nlh);
Thomas Graf5424f322007-08-22 14:01:33 -07001827 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
Steffen Klassertd8647b72011-03-08 00:10:27 +00001828 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
Thomas Graf5424f322007-08-22 14:01:33 -07001829 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001830
Steffen Klassertd8647b72011-03-08 00:10:27 +00001831 if (!lt && !rp && !re)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001832 return err;
1833
1834 /* pedantic mode - thou shalt sayeth replaceth */
1835 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1836 return err;
1837
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001838 mark = xfrm_mark_get(attrs, &m);
1839
1840 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 -08001841 if (x == NULL)
1842 return -ESRCH;
1843
1844 if (x->km.state != XFRM_STATE_VALID)
1845 goto out;
1846
Steffen Klasserte2b19122011-03-28 19:47:30 +00001847 err = xfrm_replay_verify_len(x->replay_esn, rp);
1848 if (err)
1849 goto out;
1850
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001851 spin_lock_bh(&x->lock);
Mathias Krausee3ac1042012-09-19 11:33:43 +00001852 xfrm_update_ae_params(x, attrs, 1);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001853 spin_unlock_bh(&x->lock);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001854
1855 c.event = nlh->nlmsg_type;
1856 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001857 c.portid = nlh->nlmsg_pid;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001858 c.data.aevent = XFRM_AE_CU;
1859 km_state_notify(x, &c);
1860 err = 0;
1861out:
1862 xfrm_state_put(x);
1863 return err;
1864}
1865
Christoph Hellwig22e70052007-01-02 15:22:30 -08001866static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001867 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001869 struct net *net = sock_net(skb->sk);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001870 struct km_event c;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001871 u8 type = XFRM_POLICY_TYPE_MAIN;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001872 int err;
Joy Latten161a09e2006-11-27 13:11:54 -06001873 struct xfrm_audit audit_info;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001874
Thomas Graf35a7aa02007-08-22 14:00:40 -07001875 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001876 if (err)
1877 return err;
1878
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001879 audit_info.loginuid = audit_get_loginuid(current);
1880 audit_info.sessionid = audit_get_sessionid(current);
1881 security_task_getsecid(current, &audit_info.secid);
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001882 err = xfrm_policy_flush(net, type, &audit_info);
Jamal Hadi Salim2f1eb652010-02-19 02:00:42 +00001883 if (err) {
1884 if (err == -ESRCH) /* empty table */
1885 return 0;
David S. Miller069c4742010-02-17 13:41:40 -08001886 return err;
Jamal Hadi Salim2f1eb652010-02-19 02:00:42 +00001887 }
1888
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001889 c.data.type = type;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001890 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001891 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001892 c.portid = nlh->nlmsg_pid;
Alexey Dobriyan70678022008-11-25 17:50:36 -08001893 c.net = net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001894 km_policy_notify(NULL, 0, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895 return 0;
1896}
1897
Christoph Hellwig22e70052007-01-02 15:22:30 -08001898static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001899 struct nlattr **attrs)
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001900{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001901 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001902 struct xfrm_policy *xp;
Thomas Graf7b67c852007-08-22 13:53:52 -07001903 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001904 struct xfrm_userpolicy_info *p = &up->pol;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001905 u8 type = XFRM_POLICY_TYPE_MAIN;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001906 int err = -ENOENT;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001907 struct xfrm_mark m;
1908 u32 mark = xfrm_mark_get(attrs, &m);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001909
Thomas Graf35a7aa02007-08-22 14:00:40 -07001910 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001911 if (err)
1912 return err;
1913
Timo Teräsc8bf4d02010-03-31 00:17:04 +00001914 err = verify_policy_dir(p->dir);
1915 if (err)
1916 return err;
1917
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001918 if (p->index)
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001919 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001920 else {
Thomas Graf5424f322007-08-22 14:01:33 -07001921 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Paul Moore03e1ad72008-04-12 19:07:52 -07001922 struct xfrm_sec_ctx *ctx;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001923
Thomas Graf35a7aa02007-08-22 14:00:40 -07001924 err = verify_sec_ctx_len(attrs);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001925 if (err)
1926 return err;
1927
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001928 ctx = NULL;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001929 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001930 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001931
Paul Moore03e1ad72008-04-12 19:07:52 -07001932 err = security_xfrm_policy_alloc(&ctx, uctx);
1933 if (err)
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001934 return err;
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001935 }
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001936 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001937 &p->sel, ctx, 0, &err);
Paul Moore03e1ad72008-04-12 19:07:52 -07001938 security_xfrm_policy_free(ctx);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001939 }
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001940 if (xp == NULL)
Eric Parisef41aaa2007-03-07 15:37:58 -08001941 return -ENOENT;
Paul Moore03e1ad72008-04-12 19:07:52 -07001942
Timo Teräsea2dea92010-03-31 00:17:05 +00001943 if (unlikely(xp->walk.dead))
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001944 goto out;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001945
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001946 err = 0;
1947 if (up->hard) {
Eric W. Biedermane1760bd2012-09-10 22:39:43 -07001948 kuid_t loginuid = audit_get_loginuid(current);
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001949 u32 sessionid = audit_get_sessionid(current);
1950 u32 sid;
1951
1952 security_task_getsecid(current, &sid);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001953 xfrm_policy_delete(xp, p->dir);
Eric Paris25323862008-04-18 10:09:25 -04001954 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -06001955
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001956 } else {
1957 // reset the timers here?
stephen hemminger62db5cf2010-05-12 06:37:06 +00001958 WARN(1, "Dont know what to do with soft policy expire\n");
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001959 }
Eric W. Biedermanc6bb8132012-09-07 21:17:17 +00001960 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001961
1962out:
1963 xfrm_pol_put(xp);
1964 return err;
1965}
1966
Christoph Hellwig22e70052007-01-02 15:22:30 -08001967static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001968 struct nlattr **attrs)
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001969{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001970 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001971 struct xfrm_state *x;
1972 int err;
Thomas Graf7b67c852007-08-22 13:53:52 -07001973 struct xfrm_user_expire *ue = nlmsg_data(nlh);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001974 struct xfrm_usersa_info *p = &ue->state;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001975 struct xfrm_mark m;
Nicolas Dichtel928497f2010-08-31 05:54:00 +00001976 u32 mark = xfrm_mark_get(attrs, &m);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001977
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001978 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 -08001979
David S. Miller3a765aa2007-02-26 14:52:21 -08001980 err = -ENOENT;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001981 if (x == NULL)
1982 return err;
1983
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001984 spin_lock_bh(&x->lock);
David S. Miller3a765aa2007-02-26 14:52:21 -08001985 err = -EINVAL;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001986 if (x->km.state != XFRM_STATE_VALID)
1987 goto out;
Eric W. Biedermanc6bb8132012-09-07 21:17:17 +00001988 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001989
Joy Latten161a09e2006-11-27 13:11:54 -06001990 if (ue->hard) {
Eric W. Biedermane1760bd2012-09-10 22:39:43 -07001991 kuid_t loginuid = audit_get_loginuid(current);
Patrick McHardyc53fa1e2011-03-03 10:55:40 -08001992 u32 sessionid = audit_get_sessionid(current);
1993 u32 sid;
1994
1995 security_task_getsecid(current, &sid);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001996 __xfrm_state_delete(x);
Eric Paris25323862008-04-18 10:09:25 -04001997 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -06001998 }
David S. Miller3a765aa2007-02-26 14:52:21 -08001999 err = 0;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002000out:
2001 spin_unlock_bh(&x->lock);
2002 xfrm_state_put(x);
2003 return err;
2004}
2005
Christoph Hellwig22e70052007-01-02 15:22:30 -08002006static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07002007 struct nlattr **attrs)
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002008{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002009 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002010 struct xfrm_policy *xp;
2011 struct xfrm_user_tmpl *ut;
2012 int i;
Thomas Graf5424f322007-08-22 14:01:33 -07002013 struct nlattr *rt = attrs[XFRMA_TMPL];
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002014 struct xfrm_mark mark;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002015
Thomas Graf7b67c852007-08-22 13:53:52 -07002016 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002017 struct xfrm_state *x = xfrm_state_alloc(net);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002018 int err = -ENOMEM;
2019
2020 if (!x)
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002021 goto nomem;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002022
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002023 xfrm_mark_get(attrs, &mark);
2024
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002025 err = verify_newpolicy_info(&ua->policy);
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002026 if (err)
2027 goto bad_policy;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002028
2029 /* build an XP */
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002030 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002031 if (!xp)
2032 goto free_state;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002033
2034 memcpy(&x->id, &ua->id, sizeof(ua->id));
2035 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2036 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002037 xp->mark.m = x->mark.m = mark.m;
2038 xp->mark.v = x->mark.v = mark.v;
Thomas Graf5424f322007-08-22 14:01:33 -07002039 ut = nla_data(rt);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002040 /* extract the templates and for each call km_key */
2041 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2042 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2043 memcpy(&x->id, &t->id, sizeof(x->id));
2044 x->props.mode = t->mode;
2045 x->props.reqid = t->reqid;
2046 x->props.family = ut->family;
2047 t->aalgos = ua->aalgos;
2048 t->ealgos = ua->ealgos;
2049 t->calgos = ua->calgos;
2050 err = km_query(x, t, xp);
2051
2052 }
2053
2054 kfree(x);
2055 kfree(xp);
2056
2057 return 0;
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002058
2059bad_policy:
stephen hemminger62db5cf2010-05-12 06:37:06 +00002060 WARN(1, "BAD policy passed\n");
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002061free_state:
2062 kfree(x);
2063nomem:
2064 return err;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002065}
2066
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002067#ifdef CONFIG_XFRM_MIGRATE
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002068static int copy_from_user_migrate(struct xfrm_migrate *ma,
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002069 struct xfrm_kmaddress *k,
Thomas Graf5424f322007-08-22 14:01:33 -07002070 struct nlattr **attrs, int *num)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002071{
Thomas Graf5424f322007-08-22 14:01:33 -07002072 struct nlattr *rt = attrs[XFRMA_MIGRATE];
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002073 struct xfrm_user_migrate *um;
2074 int i, num_migrate;
2075
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002076 if (k != NULL) {
2077 struct xfrm_user_kmaddress *uk;
2078
2079 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2080 memcpy(&k->local, &uk->local, sizeof(k->local));
2081 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2082 k->family = uk->family;
2083 k->reserved = uk->reserved;
2084 }
2085
Thomas Graf5424f322007-08-22 14:01:33 -07002086 um = nla_data(rt);
2087 num_migrate = nla_len(rt) / sizeof(*um);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002088
2089 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2090 return -EINVAL;
2091
2092 for (i = 0; i < num_migrate; i++, um++, ma++) {
2093 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2094 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2095 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2096 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2097
2098 ma->proto = um->proto;
2099 ma->mode = um->mode;
2100 ma->reqid = um->reqid;
2101
2102 ma->old_family = um->old_family;
2103 ma->new_family = um->new_family;
2104 }
2105
2106 *num = i;
2107 return 0;
2108}
2109
2110static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07002111 struct nlattr **attrs)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002112{
Thomas Graf7b67c852007-08-22 13:53:52 -07002113 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002114 struct xfrm_migrate m[XFRM_MAX_DEPTH];
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002115 struct xfrm_kmaddress km, *kmp;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002116 u8 type;
2117 int err;
2118 int n = 0;
2119
Thomas Graf35a7aa02007-08-22 14:00:40 -07002120 if (attrs[XFRMA_MIGRATE] == NULL)
Thomas Grafcf5cb792007-08-22 13:59:04 -07002121 return -EINVAL;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002122
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002123 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2124
Thomas Graf5424f322007-08-22 14:01:33 -07002125 err = copy_from_user_policy_type(&type, attrs);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002126 if (err)
2127 return err;
2128
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002129 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002130 if (err)
2131 return err;
2132
2133 if (!n)
2134 return 0;
2135
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002136 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002137
2138 return 0;
2139}
2140#else
2141static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07002142 struct nlattr **attrs)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002143{
2144 return -ENOPROTOOPT;
2145}
2146#endif
2147
2148#ifdef CONFIG_XFRM_MIGRATE
David S. Miller183cad12011-02-24 00:28:01 -05002149static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002150{
2151 struct xfrm_user_migrate um;
2152
2153 memset(&um, 0, sizeof(um));
2154 um.proto = m->proto;
2155 um.mode = m->mode;
2156 um.reqid = m->reqid;
2157 um.old_family = m->old_family;
2158 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2159 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2160 um.new_family = m->new_family;
2161 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2162 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2163
Thomas Grafc0144be2007-08-22 13:55:43 -07002164 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002165}
2166
David S. Miller183cad12011-02-24 00:28:01 -05002167static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002168{
2169 struct xfrm_user_kmaddress uk;
2170
2171 memset(&uk, 0, sizeof(uk));
2172 uk.family = k->family;
2173 uk.reserved = k->reserved;
2174 memcpy(&uk.local, &k->local, sizeof(uk.local));
Arnaud Ebalarda1caa322008-11-03 01:30:23 -08002175 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002176
2177 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2178}
2179
2180static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
Thomas Graf7deb2262007-08-22 13:57:39 -07002181{
2182 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002183 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2184 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2185 + userpolicy_type_attrsize();
Thomas Graf7deb2262007-08-22 13:57:39 -07002186}
2187
David S. Miller183cad12011-02-24 00:28:01 -05002188static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2189 int num_migrate, const struct xfrm_kmaddress *k,
2190 const struct xfrm_selector *sel, u8 dir, u8 type)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002191{
David S. Miller183cad12011-02-24 00:28:01 -05002192 const struct xfrm_migrate *mp;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002193 struct xfrm_userpolicy_id *pol_id;
2194 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002195 int i, err;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002196
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002197 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2198 if (nlh == NULL)
2199 return -EMSGSIZE;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002200
Thomas Graf7b67c852007-08-22 13:53:52 -07002201 pol_id = nlmsg_data(nlh);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002202 /* copy data from selector, dir, and type to the pol_id */
2203 memset(pol_id, 0, sizeof(*pol_id));
2204 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2205 pol_id->dir = dir;
2206
David S. Miller1d1e34d2012-06-27 21:57:03 -07002207 if (k != NULL) {
2208 err = copy_to_user_kmaddress(k, skb);
2209 if (err)
2210 goto out_cancel;
2211 }
2212 err = copy_to_user_policy_type(type, skb);
2213 if (err)
2214 goto out_cancel;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002215 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
David S. Miller1d1e34d2012-06-27 21:57:03 -07002216 err = copy_to_user_migrate(mp, skb);
2217 if (err)
2218 goto out_cancel;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002219 }
2220
Thomas Graf98250692007-08-22 12:47:26 -07002221 return nlmsg_end(skb, nlh);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002222
2223out_cancel:
Thomas Graf98250692007-08-22 12:47:26 -07002224 nlmsg_cancel(skb, nlh);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002225 return err;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002226}
2227
David S. Miller183cad12011-02-24 00:28:01 -05002228static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2229 const struct xfrm_migrate *m, int num_migrate,
2230 const struct xfrm_kmaddress *k)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002231{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002232 struct net *net = &init_net;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002233 struct sk_buff *skb;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002234
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002235 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002236 if (skb == NULL)
2237 return -ENOMEM;
2238
2239 /* build migrate */
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002240 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002241 BUG();
2242
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002243 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002244}
2245#else
David S. Miller183cad12011-02-24 00:28:01 -05002246static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2247 const struct xfrm_migrate *m, int num_migrate,
2248 const struct xfrm_kmaddress *k)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002249{
2250 return -ENOPROTOOPT;
2251}
2252#endif
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002253
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002254#define XMSGSIZE(type) sizeof(struct type)
Thomas Graf492b5582005-05-03 14:26:40 -07002255
2256static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
David S. Miller66f9a252009-01-20 09:49:51 -08002257 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
Thomas Graf492b5582005-05-03 14:26:40 -07002258 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2259 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2260 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2261 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2262 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2263 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002264 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002265 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
Thomas Graf492b5582005-05-03 14:26:40 -07002266 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
David S. Miller66f9a252009-01-20 09:49:51 -08002267 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002268 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
Thomas Graf492b5582005-05-03 14:26:40 -07002269 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002270 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002271 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2272 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002273 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002274 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002275 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2276 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002277};
2278
Thomas Graf492b5582005-05-03 14:26:40 -07002279#undef XMSGSIZE
2280
Thomas Grafcf5cb792007-08-22 13:59:04 -07002281static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
jamalc28e9302010-02-09 03:59:38 +00002282 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2283 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2284 [XFRMA_LASTUSED] = { .type = NLA_U64},
2285 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
Herbert Xu1a6509d2008-01-28 19:37:29 -08002286 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
Thomas Grafcf5cb792007-08-22 13:59:04 -07002287 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2288 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2289 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2290 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2291 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2292 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2293 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2294 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2295 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2296 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2297 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2298 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2299 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2300 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002301 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002302 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
Martin Willi35d28562010-12-08 04:37:49 +00002303 [XFRMA_TFCPAD] = { .type = NLA_U32 },
Steffen Klassertd8647b72011-03-08 00:10:27 +00002304 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
Thomas Grafcf5cb792007-08-22 13:59:04 -07002305};
2306
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307static struct xfrm_link {
Thomas Graf5424f322007-08-22 14:01:33 -07002308 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002309 int (*dump)(struct sk_buff *, struct netlink_callback *);
Timo Teras4c563f72008-02-28 21:31:08 -08002310 int (*done)(struct netlink_callback *);
Thomas Graf492b5582005-05-03 14:26:40 -07002311} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2312 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2313 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2314 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
Timo Teras4c563f72008-02-28 21:31:08 -08002315 .dump = xfrm_dump_sa,
2316 .done = xfrm_dump_sa_done },
Thomas Graf492b5582005-05-03 14:26:40 -07002317 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2318 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2319 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
Timo Teras4c563f72008-02-28 21:31:08 -08002320 .dump = xfrm_dump_policy,
2321 .done = xfrm_dump_policy_done },
Thomas Graf492b5582005-05-03 14:26:40 -07002322 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002323 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002324 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
Thomas Graf492b5582005-05-03 14:26:40 -07002325 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2326 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002327 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
Thomas Graf492b5582005-05-03 14:26:40 -07002328 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2329 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002330 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2331 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002332 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
Jamal Hadi Salim566ec032007-04-26 14:12:15 -07002333 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07002334 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
Linus Torvalds1da177e2005-04-16 15:20:36 -07002335};
2336
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002337static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002339 struct net *net = sock_net(skb->sk);
Thomas Graf35a7aa02007-08-22 14:00:40 -07002340 struct nlattr *attrs[XFRMA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002341 struct xfrm_link *link;
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002342 int type, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002343
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345 if (type > XFRM_MSG_MAX)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002346 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347
2348 type -= XFRM_MSG_BASE;
2349 link = &xfrm_dispatch[type];
2350
2351 /* All operations require privileges, even GET */
Eric W. Biedermandf008c92012-11-16 03:03:07 +00002352 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002353 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354
Thomas Graf492b5582005-05-03 14:26:40 -07002355 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2356 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
David S. Millerb8f3ab42011-01-18 12:40:38 -08002357 (nlh->nlmsg_flags & NLM_F_DUMP)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002358 if (link->dump == NULL)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002359 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00002361 {
2362 struct netlink_dump_control c = {
2363 .dump = link->dump,
2364 .done = link->done,
2365 };
2366 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2367 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002368 }
2369
Thomas Graf35a7aa02007-08-22 14:00:40 -07002370 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
Thomas Grafcf5cb792007-08-22 13:59:04 -07002371 xfrma_policy);
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002372 if (err < 0)
2373 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002374
2375 if (link->doit == NULL)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002376 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377
Thomas Graf5424f322007-08-22 14:01:33 -07002378 return link->doit(skb, nlh, attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379}
2380
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002381static void xfrm_netlink_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002383 mutex_lock(&xfrm_cfg_mutex);
2384 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2385 mutex_unlock(&xfrm_cfg_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386}
2387
Thomas Graf7deb2262007-08-22 13:57:39 -07002388static inline size_t xfrm_expire_msgsize(void)
2389{
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002390 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2391 + nla_total_size(sizeof(struct xfrm_mark));
Thomas Graf7deb2262007-08-22 13:57:39 -07002392}
2393
David S. Miller214e0052011-02-24 00:02:38 -05002394static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395{
2396 struct xfrm_user_expire *ue;
2397 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002398 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002399
Eric W. Biederman15e47302012-09-07 20:12:54 +00002400 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002401 if (nlh == NULL)
2402 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002403
Thomas Graf7b67c852007-08-22 13:53:52 -07002404 ue = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002405 copy_to_user_state(x, &ue->state);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002406 ue->hard = (c->data.hard != 0) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407
David S. Miller1d1e34d2012-06-27 21:57:03 -07002408 err = xfrm_mark_put(skb, &x->mark);
2409 if (err)
2410 return err;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002411
Thomas Graf98250692007-08-22 12:47:26 -07002412 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002413}
2414
David S. Miller214e0052011-02-24 00:02:38 -05002415static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002417 struct net *net = xs_net(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418 struct sk_buff *skb;
2419
Thomas Graf7deb2262007-08-22 13:57:39 -07002420 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421 if (skb == NULL)
2422 return -ENOMEM;
2423
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002424 if (build_expire(skb, x, c) < 0) {
2425 kfree_skb(skb);
2426 return -EMSGSIZE;
2427 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002428
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002429 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002430}
2431
David S. Miller214e0052011-02-24 00:02:38 -05002432static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002433{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002434 struct net *net = xs_net(x);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002435 struct sk_buff *skb;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002436
Steffen Klassertd8647b72011-03-08 00:10:27 +00002437 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002438 if (skb == NULL)
2439 return -ENOMEM;
2440
2441 if (build_aevent(skb, x, c) < 0)
2442 BUG();
2443
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002444 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002445}
2446
David S. Miller214e0052011-02-24 00:02:38 -05002447static int xfrm_notify_sa_flush(const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002448{
Alexey Dobriyan70678022008-11-25 17:50:36 -08002449 struct net *net = c->net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002450 struct xfrm_usersa_flush *p;
2451 struct nlmsghdr *nlh;
2452 struct sk_buff *skb;
Thomas Graf7deb2262007-08-22 13:57:39 -07002453 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002454
Thomas Graf7deb2262007-08-22 13:57:39 -07002455 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002456 if (skb == NULL)
2457 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002458
Eric W. Biederman15e47302012-09-07 20:12:54 +00002459 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002460 if (nlh == NULL) {
2461 kfree_skb(skb);
2462 return -EMSGSIZE;
2463 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002464
Thomas Graf7b67c852007-08-22 13:53:52 -07002465 p = nlmsg_data(nlh);
Herbert Xubf088672005-06-18 22:44:00 -07002466 p->proto = c->data.proto;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002467
Thomas Graf98250692007-08-22 12:47:26 -07002468 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002469
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002470 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002471}
2472
Thomas Graf7deb2262007-08-22 13:57:39 -07002473static inline size_t xfrm_sa_len(struct xfrm_state *x)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002474{
Thomas Graf7deb2262007-08-22 13:57:39 -07002475 size_t l = 0;
Herbert Xu1a6509d2008-01-28 19:37:29 -08002476 if (x->aead)
2477 l += nla_total_size(aead_len(x->aead));
Martin Willi4447bb32009-11-25 00:29:52 +00002478 if (x->aalg) {
2479 l += nla_total_size(sizeof(struct xfrm_algo) +
2480 (x->aalg->alg_key_len + 7) / 8);
2481 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2482 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002483 if (x->ealg)
Eric Dumazet0f99be02008-01-08 23:39:06 -08002484 l += nla_total_size(xfrm_alg_len(x->ealg));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002485 if (x->calg)
Thomas Graf7deb2262007-08-22 13:57:39 -07002486 l += nla_total_size(sizeof(*x->calg));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002487 if (x->encap)
Thomas Graf7deb2262007-08-22 13:57:39 -07002488 l += nla_total_size(sizeof(*x->encap));
Martin Willi35d28562010-12-08 04:37:49 +00002489 if (x->tfcpad)
2490 l += nla_total_size(sizeof(x->tfcpad));
Steffen Klassertd8647b72011-03-08 00:10:27 +00002491 if (x->replay_esn)
2492 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
Herbert Xu68325d32007-10-09 13:30:57 -07002493 if (x->security)
2494 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2495 x->security->ctx_len);
2496 if (x->coaddr)
2497 l += nla_total_size(sizeof(*x->coaddr));
2498
Herbert Xud26f3982007-11-13 21:47:08 -08002499 /* Must count x->lastused as it may become non-zero behind our back. */
2500 l += nla_total_size(sizeof(u64));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002501
2502 return l;
2503}
2504
David S. Miller214e0052011-02-24 00:02:38 -05002505static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002506{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002507 struct net *net = xs_net(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002508 struct xfrm_usersa_info *p;
Herbert Xu0603eac2005-06-18 22:54:36 -07002509 struct xfrm_usersa_id *id;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002510 struct nlmsghdr *nlh;
2511 struct sk_buff *skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002512 int len = xfrm_sa_len(x);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002513 int headlen, err;
Herbert Xu0603eac2005-06-18 22:54:36 -07002514
2515 headlen = sizeof(*p);
2516 if (c->event == XFRM_MSG_DELSA) {
Thomas Graf7deb2262007-08-22 13:57:39 -07002517 len += nla_total_size(headlen);
Herbert Xu0603eac2005-06-18 22:54:36 -07002518 headlen = sizeof(*id);
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002519 len += nla_total_size(sizeof(struct xfrm_mark));
Herbert Xu0603eac2005-06-18 22:54:36 -07002520 }
Thomas Graf7deb2262007-08-22 13:57:39 -07002521 len += NLMSG_ALIGN(headlen);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002522
Thomas Graf7deb2262007-08-22 13:57:39 -07002523 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002524 if (skb == NULL)
2525 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002526
Eric W. Biederman15e47302012-09-07 20:12:54 +00002527 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002528 err = -EMSGSIZE;
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002529 if (nlh == NULL)
David S. Miller1d1e34d2012-06-27 21:57:03 -07002530 goto out_free_skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002531
Thomas Graf7b67c852007-08-22 13:53:52 -07002532 p = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002533 if (c->event == XFRM_MSG_DELSA) {
Thomas Grafc0144be2007-08-22 13:55:43 -07002534 struct nlattr *attr;
2535
Thomas Graf7b67c852007-08-22 13:53:52 -07002536 id = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002537 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2538 id->spi = x->id.spi;
2539 id->family = x->props.family;
2540 id->proto = x->id.proto;
2541
Thomas Grafc0144be2007-08-22 13:55:43 -07002542 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
David S. Miller1d1e34d2012-06-27 21:57:03 -07002543 err = -EMSGSIZE;
Thomas Grafc0144be2007-08-22 13:55:43 -07002544 if (attr == NULL)
David S. Miller1d1e34d2012-06-27 21:57:03 -07002545 goto out_free_skb;
Thomas Grafc0144be2007-08-22 13:55:43 -07002546
2547 p = nla_data(attr);
Herbert Xu0603eac2005-06-18 22:54:36 -07002548 }
David S. Miller1d1e34d2012-06-27 21:57:03 -07002549 err = copy_to_user_state_extra(x, p, skb);
2550 if (err)
2551 goto out_free_skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002552
Thomas Graf98250692007-08-22 12:47:26 -07002553 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002554
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002555 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002556
David S. Miller1d1e34d2012-06-27 21:57:03 -07002557out_free_skb:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002558 kfree_skb(skb);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002559 return err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002560}
2561
David S. Miller214e0052011-02-24 00:02:38 -05002562static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002563{
2564
2565 switch (c->event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07002566 case XFRM_MSG_EXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002567 return xfrm_exp_state_notify(x, c);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002568 case XFRM_MSG_NEWAE:
2569 return xfrm_aevent_state_notify(x, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002570 case XFRM_MSG_DELSA:
2571 case XFRM_MSG_UPDSA:
2572 case XFRM_MSG_NEWSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002573 return xfrm_notify_sa(x, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002574 case XFRM_MSG_FLUSHSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002575 return xfrm_notify_sa_flush(c);
2576 default:
stephen hemminger62db5cf2010-05-12 06:37:06 +00002577 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2578 c->event);
2579 break;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002580 }
2581
2582 return 0;
2583
2584}
2585
Thomas Graf7deb2262007-08-22 13:57:39 -07002586static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2587 struct xfrm_policy *xp)
2588{
2589 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2590 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002591 + nla_total_size(sizeof(struct xfrm_mark))
Thomas Graf7deb2262007-08-22 13:57:39 -07002592 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2593 + userpolicy_type_attrsize();
2594}
2595
Linus Torvalds1da177e2005-04-16 15:20:36 -07002596static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
Fan Du65e07362012-08-15 10:13:47 +08002597 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002598{
David S. Miller1d1e34d2012-06-27 21:57:03 -07002599 __u32 seq = xfrm_get_acqseq();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002600 struct xfrm_user_acquire *ua;
2601 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002602 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002603
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002604 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2605 if (nlh == NULL)
2606 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002607
Thomas Graf7b67c852007-08-22 13:53:52 -07002608 ua = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002609 memcpy(&ua->id, &x->id, sizeof(ua->id));
2610 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2611 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
Fan Du65e07362012-08-15 10:13:47 +08002612 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002613 ua->aalgos = xt->aalgos;
2614 ua->ealgos = xt->ealgos;
2615 ua->calgos = xt->calgos;
2616 ua->seq = x->km.seq = seq;
2617
David S. Miller1d1e34d2012-06-27 21:57:03 -07002618 err = copy_to_user_tmpl(xp, skb);
2619 if (!err)
2620 err = copy_to_user_state_sec_ctx(x, skb);
2621 if (!err)
2622 err = copy_to_user_policy_type(xp->type, skb);
2623 if (!err)
2624 err = xfrm_mark_put(skb, &xp->mark);
2625 if (err) {
2626 nlmsg_cancel(skb, nlh);
2627 return err;
2628 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629
Thomas Graf98250692007-08-22 12:47:26 -07002630 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002631}
2632
2633static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
Fan Du65e07362012-08-15 10:13:47 +08002634 struct xfrm_policy *xp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002636 struct net *net = xs_net(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002637 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002638
Thomas Graf7deb2262007-08-22 13:57:39 -07002639 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002640 if (skb == NULL)
2641 return -ENOMEM;
2642
Fan Du65e07362012-08-15 10:13:47 +08002643 if (build_acquire(skb, x, xt, xp) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002644 BUG();
2645
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002646 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002647}
2648
2649/* User gives us xfrm_user_policy_info followed by an array of 0
2650 * or more templates.
2651 */
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07002652static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002653 u8 *data, int len, int *dir)
2654{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002655 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002656 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2657 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2658 struct xfrm_policy *xp;
2659 int nr;
2660
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07002661 switch (sk->sk_family) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002662 case AF_INET:
2663 if (opt != IP_XFRM_POLICY) {
2664 *dir = -EOPNOTSUPP;
2665 return NULL;
2666 }
2667 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00002668#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002669 case AF_INET6:
2670 if (opt != IPV6_XFRM_POLICY) {
2671 *dir = -EOPNOTSUPP;
2672 return NULL;
2673 }
2674 break;
2675#endif
2676 default:
2677 *dir = -EINVAL;
2678 return NULL;
2679 }
2680
2681 *dir = -EINVAL;
2682
2683 if (len < sizeof(*p) ||
2684 verify_newpolicy_info(p))
2685 return NULL;
2686
2687 nr = ((len - sizeof(*p)) / sizeof(*ut));
David S. Millerb4ad86bf2006-12-03 19:19:26 -08002688 if (validate_tmpl(nr, ut, p->sel.family))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002689 return NULL;
2690
Herbert Xua4f1bac2005-07-26 15:43:17 -07002691 if (p->dir > XFRM_POLICY_OUT)
2692 return NULL;
2693
Herbert Xu2f09a4d2010-08-14 22:38:09 -07002694 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002695 if (xp == NULL) {
2696 *dir = -ENOBUFS;
2697 return NULL;
2698 }
2699
2700 copy_from_user_policy(xp, p);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002701 xp->type = XFRM_POLICY_TYPE_MAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002702 copy_templates(xp, ut, nr);
2703
2704 *dir = p->dir;
2705
2706 return xp;
2707}
2708
Thomas Graf7deb2262007-08-22 13:57:39 -07002709static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2710{
2711 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2712 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2713 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002714 + nla_total_size(sizeof(struct xfrm_mark))
Thomas Graf7deb2262007-08-22 13:57:39 -07002715 + userpolicy_type_attrsize();
2716}
2717
Linus Torvalds1da177e2005-04-16 15:20:36 -07002718static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
David S. Miller214e0052011-02-24 00:02:38 -05002719 int dir, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720{
2721 struct xfrm_user_polexpire *upe;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002722 int hard = c->data.hard;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002723 struct nlmsghdr *nlh;
2724 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002725
Eric W. Biederman15e47302012-09-07 20:12:54 +00002726 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002727 if (nlh == NULL)
2728 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002729
Thomas Graf7b67c852007-08-22 13:53:52 -07002730 upe = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002731 copy_to_user_policy(xp, &upe->pol, dir);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002732 err = copy_to_user_tmpl(xp, skb);
2733 if (!err)
2734 err = copy_to_user_sec_ctx(xp, skb);
2735 if (!err)
2736 err = copy_to_user_policy_type(xp->type, skb);
2737 if (!err)
2738 err = xfrm_mark_put(skb, &xp->mark);
2739 if (err) {
2740 nlmsg_cancel(skb, nlh);
2741 return err;
2742 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002743 upe->hard = !!hard;
2744
Thomas Graf98250692007-08-22 12:47:26 -07002745 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746}
2747
David S. Miller214e0052011-02-24 00:02:38 -05002748static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002749{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002750 struct net *net = xp_net(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002751 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002752
Thomas Graf7deb2262007-08-22 13:57:39 -07002753 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754 if (skb == NULL)
2755 return -ENOMEM;
2756
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002757 if (build_polexpire(skb, xp, dir, c) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002758 BUG();
2759
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002760 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002761}
2762
David S. Miller214e0052011-02-24 00:02:38 -05002763static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002764{
David S. Miller1d1e34d2012-06-27 21:57:03 -07002765 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002766 struct net *net = xp_net(xp);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002767 struct xfrm_userpolicy_info *p;
Herbert Xu0603eac2005-06-18 22:54:36 -07002768 struct xfrm_userpolicy_id *id;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002769 struct nlmsghdr *nlh;
2770 struct sk_buff *skb;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002771 int headlen, err;
Herbert Xu0603eac2005-06-18 22:54:36 -07002772
2773 headlen = sizeof(*p);
2774 if (c->event == XFRM_MSG_DELPOLICY) {
Thomas Graf7deb2262007-08-22 13:57:39 -07002775 len += nla_total_size(headlen);
Herbert Xu0603eac2005-06-18 22:54:36 -07002776 headlen = sizeof(*id);
2777 }
Thomas Grafcfbfd452007-08-22 13:57:04 -07002778 len += userpolicy_type_attrsize();
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002779 len += nla_total_size(sizeof(struct xfrm_mark));
Thomas Graf7deb2262007-08-22 13:57:39 -07002780 len += NLMSG_ALIGN(headlen);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002781
Thomas Graf7deb2262007-08-22 13:57:39 -07002782 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002783 if (skb == NULL)
2784 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002785
Eric W. Biederman15e47302012-09-07 20:12:54 +00002786 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002787 err = -EMSGSIZE;
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002788 if (nlh == NULL)
David S. Miller1d1e34d2012-06-27 21:57:03 -07002789 goto out_free_skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002790
Thomas Graf7b67c852007-08-22 13:53:52 -07002791 p = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002792 if (c->event == XFRM_MSG_DELPOLICY) {
Thomas Grafc0144be2007-08-22 13:55:43 -07002793 struct nlattr *attr;
2794
Thomas Graf7b67c852007-08-22 13:53:52 -07002795 id = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002796 memset(id, 0, sizeof(*id));
2797 id->dir = dir;
2798 if (c->data.byid)
2799 id->index = xp->index;
2800 else
2801 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2802
Thomas Grafc0144be2007-08-22 13:55:43 -07002803 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
David S. Miller1d1e34d2012-06-27 21:57:03 -07002804 err = -EMSGSIZE;
Thomas Grafc0144be2007-08-22 13:55:43 -07002805 if (attr == NULL)
David S. Miller1d1e34d2012-06-27 21:57:03 -07002806 goto out_free_skb;
Thomas Grafc0144be2007-08-22 13:55:43 -07002807
2808 p = nla_data(attr);
Herbert Xu0603eac2005-06-18 22:54:36 -07002809 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002810
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002811 copy_to_user_policy(xp, p, dir);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002812 err = copy_to_user_tmpl(xp, skb);
2813 if (!err)
2814 err = copy_to_user_policy_type(xp->type, skb);
2815 if (!err)
2816 err = xfrm_mark_put(skb, &xp->mark);
2817 if (err)
2818 goto out_free_skb;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002819
Thomas Graf98250692007-08-22 12:47:26 -07002820 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002821
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002822 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002823
David S. Miller1d1e34d2012-06-27 21:57:03 -07002824out_free_skb:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002825 kfree_skb(skb);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002826 return err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002827}
2828
David S. Miller214e0052011-02-24 00:02:38 -05002829static int xfrm_notify_policy_flush(const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002830{
Alexey Dobriyan70678022008-11-25 17:50:36 -08002831 struct net *net = c->net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002832 struct nlmsghdr *nlh;
2833 struct sk_buff *skb;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002834 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002835
Thomas Graf7deb2262007-08-22 13:57:39 -07002836 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002837 if (skb == NULL)
2838 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002839
Eric W. Biederman15e47302012-09-07 20:12:54 +00002840 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002841 err = -EMSGSIZE;
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002842 if (nlh == NULL)
David S. Miller1d1e34d2012-06-27 21:57:03 -07002843 goto out_free_skb;
2844 err = copy_to_user_policy_type(c->data.type, skb);
2845 if (err)
2846 goto out_free_skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002847
Thomas Graf98250692007-08-22 12:47:26 -07002848 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002849
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002850 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002851
David S. Miller1d1e34d2012-06-27 21:57:03 -07002852out_free_skb:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002853 kfree_skb(skb);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002854 return err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002855}
2856
David S. Miller214e0052011-02-24 00:02:38 -05002857static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002858{
2859
2860 switch (c->event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07002861 case XFRM_MSG_NEWPOLICY:
2862 case XFRM_MSG_UPDPOLICY:
2863 case XFRM_MSG_DELPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002864 return xfrm_notify_policy(xp, dir, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002865 case XFRM_MSG_FLUSHPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002866 return xfrm_notify_policy_flush(c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002867 case XFRM_MSG_POLEXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002868 return xfrm_exp_policy_notify(xp, dir, c);
2869 default:
stephen hemminger62db5cf2010-05-12 06:37:06 +00002870 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2871 c->event);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002872 }
2873
2874 return 0;
2875
2876}
2877
Thomas Graf7deb2262007-08-22 13:57:39 -07002878static inline size_t xfrm_report_msgsize(void)
2879{
2880 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2881}
2882
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002883static int build_report(struct sk_buff *skb, u8 proto,
2884 struct xfrm_selector *sel, xfrm_address_t *addr)
2885{
2886 struct xfrm_user_report *ur;
2887 struct nlmsghdr *nlh;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002888
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002889 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2890 if (nlh == NULL)
2891 return -EMSGSIZE;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002892
Thomas Graf7b67c852007-08-22 13:53:52 -07002893 ur = nlmsg_data(nlh);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002894 ur->proto = proto;
2895 memcpy(&ur->sel, sel, sizeof(ur->sel));
2896
David S. Miller1d1e34d2012-06-27 21:57:03 -07002897 if (addr) {
2898 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
2899 if (err) {
2900 nlmsg_cancel(skb, nlh);
2901 return err;
2902 }
2903 }
Thomas Graf98250692007-08-22 12:47:26 -07002904 return nlmsg_end(skb, nlh);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002905}
2906
Alexey Dobriyandb983c12008-11-25 17:51:01 -08002907static int xfrm_send_report(struct net *net, u8 proto,
2908 struct xfrm_selector *sel, xfrm_address_t *addr)
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002909{
2910 struct sk_buff *skb;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002911
Thomas Graf7deb2262007-08-22 13:57:39 -07002912 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002913 if (skb == NULL)
2914 return -ENOMEM;
2915
2916 if (build_report(skb, proto, sel, addr) < 0)
2917 BUG();
2918
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002919 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002920}
2921
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002922static inline size_t xfrm_mapping_msgsize(void)
2923{
2924 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2925}
2926
2927static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2928 xfrm_address_t *new_saddr, __be16 new_sport)
2929{
2930 struct xfrm_user_mapping *um;
2931 struct nlmsghdr *nlh;
2932
2933 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2934 if (nlh == NULL)
2935 return -EMSGSIZE;
2936
2937 um = nlmsg_data(nlh);
2938
2939 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2940 um->id.spi = x->id.spi;
2941 um->id.family = x->props.family;
2942 um->id.proto = x->id.proto;
2943 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2944 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2945 um->new_sport = new_sport;
2946 um->old_sport = x->encap->encap_sport;
2947 um->reqid = x->props.reqid;
2948
2949 return nlmsg_end(skb, nlh);
2950}
2951
2952static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2953 __be16 sport)
2954{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002955 struct net *net = xs_net(x);
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002956 struct sk_buff *skb;
2957
2958 if (x->id.proto != IPPROTO_ESP)
2959 return -EINVAL;
2960
2961 if (!x->encap)
2962 return -EINVAL;
2963
2964 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2965 if (skb == NULL)
2966 return -ENOMEM;
2967
2968 if (build_mapping(skb, x, ipaddr, sport) < 0)
2969 BUG();
2970
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002971 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002972}
2973
Linus Torvalds1da177e2005-04-16 15:20:36 -07002974static struct xfrm_mgr netlink_mgr = {
2975 .id = "netlink",
2976 .notify = xfrm_send_state_notify,
2977 .acquire = xfrm_send_acquire,
2978 .compile_policy = xfrm_compile_policy,
2979 .notify_policy = xfrm_send_policy_notify,
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002980 .report = xfrm_send_report,
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002981 .migrate = xfrm_send_migrate,
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002982 .new_mapping = xfrm_send_mapping,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002983};
2984
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002985static int __net_init xfrm_user_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002986{
Patrick McHardybe336902006-03-20 22:40:54 -08002987 struct sock *nlsk;
Pablo Neira Ayusoa31f2d12012-06-29 06:15:21 +00002988 struct netlink_kernel_cfg cfg = {
2989 .groups = XFRMNLGRP_MAX,
2990 .input = xfrm_netlink_rcv,
2991 };
Patrick McHardybe336902006-03-20 22:40:54 -08002992
Pablo Neira Ayuso9f00d972012-09-08 02:53:54 +00002993 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
Patrick McHardybe336902006-03-20 22:40:54 -08002994 if (nlsk == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002995 return -ENOMEM;
Eric W. Biedermand79d7922009-12-03 02:29:05 +00002996 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
Eric Dumazetcf778b02012-01-12 04:41:32 +00002997 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002998 return 0;
2999}
3000
Eric W. Biedermand79d7922009-12-03 02:29:05 +00003001static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
Alexey Dobriyana6483b72008-11-25 17:38:20 -08003002{
Eric W. Biedermand79d7922009-12-03 02:29:05 +00003003 struct net *net;
3004 list_for_each_entry(net, net_exit_list, exit_list)
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00003005 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
Eric W. Biedermand79d7922009-12-03 02:29:05 +00003006 synchronize_net();
3007 list_for_each_entry(net, net_exit_list, exit_list)
3008 netlink_kernel_release(net->xfrm.nlsk_stash);
Alexey Dobriyana6483b72008-11-25 17:38:20 -08003009}
3010
3011static struct pernet_operations xfrm_user_net_ops = {
Eric W. Biedermand79d7922009-12-03 02:29:05 +00003012 .init = xfrm_user_net_init,
3013 .exit_batch = xfrm_user_net_exit,
Alexey Dobriyana6483b72008-11-25 17:38:20 -08003014};
3015
3016static int __init xfrm_user_init(void)
3017{
3018 int rv;
3019
3020 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3021
3022 rv = register_pernet_subsys(&xfrm_user_net_ops);
3023 if (rv < 0)
3024 return rv;
3025 rv = xfrm_register_km(&netlink_mgr);
3026 if (rv < 0)
3027 unregister_pernet_subsys(&xfrm_user_net_ops);
3028 return rv;
3029}
3030
Linus Torvalds1da177e2005-04-16 15:20:36 -07003031static void __exit xfrm_user_exit(void)
3032{
3033 xfrm_unregister_km(&netlink_mgr);
Alexey Dobriyana6483b72008-11-25 17:38:20 -08003034 unregister_pernet_subsys(&xfrm_user_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003035}
3036
3037module_init(xfrm_user_init);
3038module_exit(xfrm_user_exit);
3039MODULE_LICENSE("GPL");
Harald Welte4fdb3bb2005-08-09 19:40:55 -07003040MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08003041