blob: d516845e16e30b69d2d47160ef9f45e6a4587a6b [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
Sowmini Varadhane33d4f12015-10-21 11:48:25 -040034#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Thomas Graf5424f322007-08-22 14:01:33 -070036static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037{
Thomas Graf5424f322007-08-22 14:01:33 -070038 struct nlattr *rt = attrs[type];
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 struct xfrm_algo *algp;
40
41 if (!rt)
42 return 0;
43
Thomas Graf5424f322007-08-22 14:01:33 -070044 algp = nla_data(rt);
Eric Dumazet0f99be02008-01-08 23:39:06 -080045 if (nla_len(rt) < xfrm_alg_len(algp))
Herbert Xu31c26852005-05-19 12:39:49 -070046 return -EINVAL;
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 switch (type) {
49 case XFRMA_ALG_AUTH:
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 case XFRMA_ALG_CRYPT:
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 case XFRMA_ALG_COMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 break;
53
54 default:
55 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -070056 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
59 return 0;
60}
61
Martin Willi4447bb32009-11-25 00:29:52 +000062static int verify_auth_trunc(struct nlattr **attrs)
63{
64 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
65 struct xfrm_algo_auth *algp;
66
67 if (!rt)
68 return 0;
69
70 algp = nla_data(rt);
71 if (nla_len(rt) < xfrm_alg_auth_len(algp))
72 return -EINVAL;
73
74 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
75 return 0;
76}
77
Herbert Xu1a6509d2008-01-28 19:37:29 -080078static int verify_aead(struct nlattr **attrs)
79{
80 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
81 struct xfrm_algo_aead *algp;
82
83 if (!rt)
84 return 0;
85
86 algp = nla_data(rt);
87 if (nla_len(rt) < aead_len(algp))
88 return -EINVAL;
89
90 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
91 return 0;
92}
93
Thomas Graf5424f322007-08-22 14:01:33 -070094static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -070095 xfrm_address_t **addrp)
96{
Thomas Graf5424f322007-08-22 14:01:33 -070097 struct nlattr *rt = attrs[type];
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -070098
Thomas Grafcf5cb792007-08-22 13:59:04 -070099 if (rt && addrp)
Thomas Graf5424f322007-08-22 14:01:33 -0700100 *addrp = nla_data(rt);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700101}
Trent Jaegerdf718372005-12-13 23:12:27 -0800102
Thomas Graf5424f322007-08-22 14:01:33 -0700103static inline int verify_sec_ctx_len(struct nlattr **attrs)
Trent Jaegerdf718372005-12-13 23:12:27 -0800104{
Thomas Graf5424f322007-08-22 14:01:33 -0700105 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Trent Jaegerdf718372005-12-13 23:12:27 -0800106 struct xfrm_user_sec_ctx *uctx;
Trent Jaegerdf718372005-12-13 23:12:27 -0800107
108 if (!rt)
109 return 0;
110
Thomas Graf5424f322007-08-22 14:01:33 -0700111 uctx = nla_data(rt);
Thomas Grafcf5cb792007-08-22 13:59:04 -0700112 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
Trent Jaegerdf718372005-12-13 23:12:27 -0800113 return -EINVAL;
114
115 return 0;
116}
117
Steffen Klassertd8647b72011-03-08 00:10:27 +0000118static inline int verify_replay(struct xfrm_usersa_info *p,
119 struct nlattr **attrs)
120{
121 struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
Mathias Krauseecd79182012-09-20 10:01:49 +0000122 struct xfrm_replay_state_esn *rs;
Steffen Klassertd8647b72011-03-08 00:10:27 +0000123
Mathias Krauseecd79182012-09-20 10:01:49 +0000124 if (p->flags & XFRM_STATE_ESN) {
125 if (!rt)
126 return -EINVAL;
127
128 rs = nla_data(rt);
129
130 if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
131 return -EINVAL;
132
133 if (nla_len(rt) < xfrm_replay_state_esn_len(rs) &&
134 nla_len(rt) != sizeof(*rs))
135 return -EINVAL;
136 }
Steffen Klassert7833aa02011-04-25 19:41:21 +0000137
Steffen Klassertd8647b72011-03-08 00:10:27 +0000138 if (!rt)
139 return 0;
140
Fan Du01714102014-01-18 09:54:28 +0800141 /* As only ESP and AH support ESN feature. */
142 if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
Steffen Klassert02aadf72011-03-28 19:48:09 +0000143 return -EINVAL;
144
Steffen Klassertd8647b72011-03-08 00:10:27 +0000145 if (p->replay_window != 0)
146 return -EINVAL;
147
148 return 0;
149}
Trent Jaegerdf718372005-12-13 23:12:27 -0800150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151static int verify_newsa_info(struct xfrm_usersa_info *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700152 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153{
154 int err;
155
156 err = -EINVAL;
157 switch (p->family) {
158 case AF_INET:
159 break;
160
161 case AF_INET6:
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000162#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 break;
164#else
165 err = -EAFNOSUPPORT;
166 goto out;
167#endif
168
169 default:
170 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700171 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
173 err = -EINVAL;
174 switch (p->id.proto) {
175 case IPPROTO_AH:
Martin Willi4447bb32009-11-25 00:29:52 +0000176 if ((!attrs[XFRMA_ALG_AUTH] &&
177 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800178 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700179 attrs[XFRMA_ALG_CRYPT] ||
Martin Willi35d28562010-12-08 04:37:49 +0000180 attrs[XFRMA_ALG_COMP] ||
Tobias Brunnera0e5ef52014-06-26 15:12:45 +0200181 attrs[XFRMA_TFCPAD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 goto out;
183 break;
184
185 case IPPROTO_ESP:
Herbert Xu1a6509d2008-01-28 19:37:29 -0800186 if (attrs[XFRMA_ALG_COMP])
187 goto out;
188 if (!attrs[XFRMA_ALG_AUTH] &&
Martin Willi4447bb32009-11-25 00:29:52 +0000189 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
Herbert Xu1a6509d2008-01-28 19:37:29 -0800190 !attrs[XFRMA_ALG_CRYPT] &&
191 !attrs[XFRMA_ALG_AEAD])
192 goto out;
193 if ((attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000194 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800195 attrs[XFRMA_ALG_CRYPT]) &&
196 attrs[XFRMA_ALG_AEAD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 goto out;
Martin Willi35d28562010-12-08 04:37:49 +0000198 if (attrs[XFRMA_TFCPAD] &&
199 p->mode != XFRM_MODE_TUNNEL)
200 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 break;
202
203 case IPPROTO_COMP:
Thomas Graf35a7aa02007-08-22 14:00:40 -0700204 if (!attrs[XFRMA_ALG_COMP] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800205 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700206 attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000207 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Martin Willi35d28562010-12-08 04:37:49 +0000208 attrs[XFRMA_ALG_CRYPT] ||
Tobias Brunnera0e5ef52014-06-26 15:12:45 +0200209 attrs[XFRMA_TFCPAD] ||
210 (ntohl(p->id.spi) >= 0x10000))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 goto out;
212 break;
213
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000214#if IS_ENABLED(CONFIG_IPV6)
Masahide NAKAMURAe23c7192006-08-23 20:33:28 -0700215 case IPPROTO_DSTOPTS:
216 case IPPROTO_ROUTING:
Thomas Graf35a7aa02007-08-22 14:00:40 -0700217 if (attrs[XFRMA_ALG_COMP] ||
218 attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000219 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800220 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700221 attrs[XFRMA_ALG_CRYPT] ||
222 attrs[XFRMA_ENCAP] ||
223 attrs[XFRMA_SEC_CTX] ||
Martin Willi35d28562010-12-08 04:37:49 +0000224 attrs[XFRMA_TFCPAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700225 !attrs[XFRMA_COADDR])
Masahide NAKAMURAe23c7192006-08-23 20:33:28 -0700226 goto out;
227 break;
228#endif
229
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 default:
231 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700232 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Herbert Xu1a6509d2008-01-28 19:37:29 -0800234 if ((err = verify_aead(attrs)))
235 goto out;
Martin Willi4447bb32009-11-25 00:29:52 +0000236 if ((err = verify_auth_trunc(attrs)))
237 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700238 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700240 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
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_COMP)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700244 if ((err = verify_sec_ctx_len(attrs)))
Trent Jaegerdf718372005-12-13 23:12:27 -0800245 goto out;
Steffen Klassertd8647b72011-03-08 00:10:27 +0000246 if ((err = verify_replay(p, attrs)))
247 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
249 err = -EINVAL;
250 switch (p->mode) {
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700251 case XFRM_MODE_TRANSPORT:
252 case XFRM_MODE_TUNNEL:
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700253 case XFRM_MODE_ROUTEOPTIMIZATION:
Diego Beltrami0a694522006-10-03 23:47:05 -0700254 case XFRM_MODE_BEET:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 break;
256
257 default:
258 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700259 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261 err = 0;
262
263out:
264 return err;
265}
266
267static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
David S. Miller6f2f19e2011-02-27 23:04:45 -0800268 struct xfrm_algo_desc *(*get_byname)(const char *, int),
Thomas Graf5424f322007-08-22 14:01:33 -0700269 struct nlattr *rta)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 struct xfrm_algo *p, *ualg;
272 struct xfrm_algo_desc *algo;
273
274 if (!rta)
275 return 0;
276
Thomas Graf5424f322007-08-22 14:01:33 -0700277 ualg = nla_data(rta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
279 algo = get_byname(ualg->alg_name, 1);
280 if (!algo)
281 return -ENOSYS;
282 *props = algo->desc.sadb_alg_id;
283
Eric Dumazet0f99be02008-01-08 23:39:06 -0800284 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 if (!p)
286 return -ENOMEM;
287
Herbert Xu04ff1262006-08-13 08:50:00 +1000288 strcpy(p->alg_name, algo->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 *algpp = p;
290 return 0;
291}
292
Herbert Xu69b01372015-05-27 16:03:45 +0800293static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
294{
295 struct xfrm_algo *p, *ualg;
296 struct xfrm_algo_desc *algo;
297
298 if (!rta)
299 return 0;
300
301 ualg = nla_data(rta);
302
303 algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
304 if (!algo)
305 return -ENOSYS;
306 x->props.ealgo = algo->desc.sadb_alg_id;
307
308 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
309 if (!p)
310 return -ENOMEM;
311
312 strcpy(p->alg_name, algo->name);
313 x->ealg = p;
314 x->geniv = algo->uinfo.encr.geniv;
315 return 0;
316}
317
Martin Willi4447bb32009-11-25 00:29:52 +0000318static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
319 struct nlattr *rta)
320{
321 struct xfrm_algo *ualg;
322 struct xfrm_algo_auth *p;
323 struct xfrm_algo_desc *algo;
324
325 if (!rta)
326 return 0;
327
328 ualg = nla_data(rta);
329
330 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
331 if (!algo)
332 return -ENOSYS;
333 *props = algo->desc.sadb_alg_id;
334
335 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
336 if (!p)
337 return -ENOMEM;
338
339 strcpy(p->alg_name, algo->name);
340 p->alg_key_len = ualg->alg_key_len;
341 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
342 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
343
344 *algpp = p;
345 return 0;
346}
347
348static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
349 struct nlattr *rta)
350{
351 struct xfrm_algo_auth *p, *ualg;
352 struct xfrm_algo_desc *algo;
353
354 if (!rta)
355 return 0;
356
357 ualg = nla_data(rta);
358
359 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
360 if (!algo)
361 return -ENOSYS;
Herbert Xu689f1c92014-09-18 16:38:18 +0800362 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
Martin Willi4447bb32009-11-25 00:29:52 +0000363 return -EINVAL;
364 *props = algo->desc.sadb_alg_id;
365
366 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
367 if (!p)
368 return -ENOMEM;
369
370 strcpy(p->alg_name, algo->name);
371 if (!p->alg_trunc_len)
372 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
373
374 *algpp = p;
375 return 0;
376}
377
Herbert Xu69b01372015-05-27 16:03:45 +0800378static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
Herbert Xu1a6509d2008-01-28 19:37:29 -0800379{
380 struct xfrm_algo_aead *p, *ualg;
381 struct xfrm_algo_desc *algo;
382
383 if (!rta)
384 return 0;
385
386 ualg = nla_data(rta);
387
388 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
389 if (!algo)
390 return -ENOSYS;
Herbert Xu69b01372015-05-27 16:03:45 +0800391 x->props.ealgo = algo->desc.sadb_alg_id;
Herbert Xu1a6509d2008-01-28 19:37:29 -0800392
393 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
394 if (!p)
395 return -ENOMEM;
396
397 strcpy(p->alg_name, algo->name);
Herbert Xu69b01372015-05-27 16:03:45 +0800398 x->aead = p;
399 x->geniv = algo->uinfo.aead.geniv;
Herbert Xu1a6509d2008-01-28 19:37:29 -0800400 return 0;
401}
402
Steffen Klasserte2b19122011-03-28 19:47:30 +0000403static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn,
404 struct nlattr *rp)
405{
406 struct xfrm_replay_state_esn *up;
Mathias Krauseecd79182012-09-20 10:01:49 +0000407 int ulen;
Steffen Klasserte2b19122011-03-28 19:47:30 +0000408
409 if (!replay_esn || !rp)
410 return 0;
411
412 up = nla_data(rp);
Mathias Krauseecd79182012-09-20 10:01:49 +0000413 ulen = xfrm_replay_state_esn_len(up);
Steffen Klasserte2b19122011-03-28 19:47:30 +0000414
Mathias Krauseecd79182012-09-20 10:01:49 +0000415 if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen)
Steffen Klasserte2b19122011-03-28 19:47:30 +0000416 return -EINVAL;
417
418 return 0;
419}
420
Steffen Klassertd8647b72011-03-08 00:10:27 +0000421static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn,
422 struct xfrm_replay_state_esn **preplay_esn,
423 struct nlattr *rta)
424{
425 struct xfrm_replay_state_esn *p, *pp, *up;
Mathias Krauseecd79182012-09-20 10:01:49 +0000426 int klen, ulen;
Steffen Klassertd8647b72011-03-08 00:10:27 +0000427
428 if (!rta)
429 return 0;
430
431 up = nla_data(rta);
Mathias Krauseecd79182012-09-20 10:01:49 +0000432 klen = xfrm_replay_state_esn_len(up);
433 ulen = nla_len(rta) >= klen ? klen : sizeof(*up);
Steffen Klassertd8647b72011-03-08 00:10:27 +0000434
Mathias Krauseecd79182012-09-20 10:01:49 +0000435 p = kzalloc(klen, GFP_KERNEL);
Steffen Klassertd8647b72011-03-08 00:10:27 +0000436 if (!p)
437 return -ENOMEM;
438
Mathias Krauseecd79182012-09-20 10:01:49 +0000439 pp = kzalloc(klen, GFP_KERNEL);
Steffen Klassertd8647b72011-03-08 00:10:27 +0000440 if (!pp) {
441 kfree(p);
442 return -ENOMEM;
443 }
444
Mathias Krauseecd79182012-09-20 10:01:49 +0000445 memcpy(p, up, ulen);
446 memcpy(pp, up, ulen);
447
Steffen Klassertd8647b72011-03-08 00:10:27 +0000448 *replay_esn = p;
449 *preplay_esn = pp;
450
451 return 0;
452}
453
Joy Latten661697f2007-04-13 16:14:35 -0700454static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
Trent Jaegerdf718372005-12-13 23:12:27 -0800455{
Trent Jaegerdf718372005-12-13 23:12:27 -0800456 int len = 0;
457
458 if (xfrm_ctx) {
459 len += sizeof(struct xfrm_user_sec_ctx);
460 len += xfrm_ctx->ctx_len;
461 }
462 return len;
463}
464
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
466{
467 memcpy(&x->id, &p->id, sizeof(x->id));
468 memcpy(&x->sel, &p->sel, sizeof(x->sel));
469 memcpy(&x->lft, &p->lft, sizeof(x->lft));
470 x->props.mode = p->mode;
Fan Du33fce602013-09-17 15:14:13 +0800471 x->props.replay_window = min_t(unsigned int, p->replay_window,
472 sizeof(x->replay.bitmap) * 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 x->props.reqid = p->reqid;
474 x->props.family = p->family;
David S. Miller54489c142006-10-27 15:29:47 -0700475 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 x->props.flags = p->flags;
Herbert Xu196b0032007-07-31 02:04:32 -0700477
Steffen Klassertccf9b3b2008-07-10 16:55:37 -0700478 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
Herbert Xu196b0032007-07-31 02:04:32 -0700479 x->sel.family = p->family;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480}
481
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800482/*
483 * someday when pfkey also has support, we could have the code
484 * somehow made shareable and move it to xfrm_state.c - JHS
485 *
486*/
Mathias Krausee3ac1042012-09-19 11:33:43 +0000487static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
488 int update_esn)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800489{
Thomas Graf5424f322007-08-22 14:01:33 -0700490 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
Mathias Krausee3ac1042012-09-19 11:33:43 +0000491 struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL;
Thomas Graf5424f322007-08-22 14:01:33 -0700492 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
493 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
494 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800495
Steffen Klassertd8647b72011-03-08 00:10:27 +0000496 if (re) {
497 struct xfrm_replay_state_esn *replay_esn;
498 replay_esn = nla_data(re);
499 memcpy(x->replay_esn, replay_esn,
500 xfrm_replay_state_esn_len(replay_esn));
501 memcpy(x->preplay_esn, replay_esn,
502 xfrm_replay_state_esn_len(replay_esn));
503 }
504
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800505 if (rp) {
506 struct xfrm_replay_state *replay;
Thomas Graf5424f322007-08-22 14:01:33 -0700507 replay = nla_data(rp);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800508 memcpy(&x->replay, replay, sizeof(*replay));
509 memcpy(&x->preplay, replay, sizeof(*replay));
510 }
511
512 if (lt) {
513 struct xfrm_lifetime_cur *ltime;
Thomas Graf5424f322007-08-22 14:01:33 -0700514 ltime = nla_data(lt);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800515 x->curlft.bytes = ltime->bytes;
516 x->curlft.packets = ltime->packets;
517 x->curlft.add_time = ltime->add_time;
518 x->curlft.use_time = ltime->use_time;
519 }
520
Thomas Grafcf5cb792007-08-22 13:59:04 -0700521 if (et)
Thomas Graf5424f322007-08-22 14:01:33 -0700522 x->replay_maxage = nla_get_u32(et);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800523
Thomas Grafcf5cb792007-08-22 13:59:04 -0700524 if (rt)
Thomas Graf5424f322007-08-22 14:01:33 -0700525 x->replay_maxdiff = nla_get_u32(rt);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800526}
527
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800528static struct xfrm_state *xfrm_state_construct(struct net *net,
529 struct xfrm_usersa_info *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700530 struct nlattr **attrs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 int *errp)
532{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800533 struct xfrm_state *x = xfrm_state_alloc(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 int err = -ENOMEM;
535
536 if (!x)
537 goto error_no_put;
538
539 copy_from_user_state(x, p);
540
Nicolas Dichtela947b0a2013-02-22 10:54:54 +0100541 if (attrs[XFRMA_SA_EXTRA_FLAGS])
542 x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
543
Herbert Xu69b01372015-05-27 16:03:45 +0800544 if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
Herbert Xu1a6509d2008-01-28 19:37:29 -0800545 goto error;
Martin Willi4447bb32009-11-25 00:29:52 +0000546 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
547 attrs[XFRMA_ALG_AUTH_TRUNC])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 goto error;
Martin Willi4447bb32009-11-25 00:29:52 +0000549 if (!x->props.aalgo) {
550 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
551 attrs[XFRMA_ALG_AUTH])))
552 goto error;
553 }
Herbert Xu69b01372015-05-27 16:03:45 +0800554 if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 goto error;
556 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
557 xfrm_calg_get_byname,
Thomas Graf35a7aa02007-08-22 14:00:40 -0700558 attrs[XFRMA_ALG_COMP])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 goto error;
Thomas Graffd211502007-09-06 03:28:08 -0700560
561 if (attrs[XFRMA_ENCAP]) {
562 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
563 sizeof(*x->encap), GFP_KERNEL);
564 if (x->encap == NULL)
565 goto error;
566 }
567
Martin Willi35d28562010-12-08 04:37:49 +0000568 if (attrs[XFRMA_TFCPAD])
569 x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]);
570
Thomas Graffd211502007-09-06 03:28:08 -0700571 if (attrs[XFRMA_COADDR]) {
572 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
573 sizeof(*x->coaddr), GFP_KERNEL);
574 if (x->coaddr == NULL)
575 goto error;
576 }
577
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000578 xfrm_mark_get(attrs, &x->mark);
579
Wei Yongjuna454f0c2011-03-21 18:08:28 -0700580 err = __xfrm_init_state(x, false);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 if (err)
582 goto error;
583
Thomas Graffd211502007-09-06 03:28:08 -0700584 if (attrs[XFRMA_SEC_CTX] &&
585 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
Trent Jaegerdf718372005-12-13 23:12:27 -0800586 goto error;
587
Steffen Klassertd8647b72011-03-08 00:10:27 +0000588 if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn,
589 attrs[XFRMA_REPLAY_ESN_VAL])))
590 goto error;
591
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 x->km.seq = p->seq;
Alexey Dobriyanb27aead2008-11-25 18:00:48 -0800593 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800594 /* sysctl_xfrm_aevent_etime is in 100ms units */
Alexey Dobriyanb27aead2008-11-25 18:00:48 -0800595 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800596
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000597 if ((err = xfrm_init_replay(x)))
598 goto error;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800599
Steffen Klassert9fdc4882011-03-08 00:08:32 +0000600 /* override default values from above */
Mathias Krausee3ac1042012-09-19 11:33:43 +0000601 xfrm_update_ae_params(x, attrs, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
603 return x;
604
605error:
606 x->km.state = XFRM_STATE_DEAD;
607 xfrm_state_put(x);
608error_no_put:
609 *errp = err;
610 return NULL;
611}
612
Christoph Hellwig22e70052007-01-02 15:22:30 -0800613static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700614 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800616 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -0700617 struct xfrm_usersa_info *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 struct xfrm_state *x;
619 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700620 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
Thomas Graf35a7aa02007-08-22 14:00:40 -0700622 err = verify_newsa_info(p, attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 if (err)
624 return err;
625
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800626 x = xfrm_state_construct(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 if (!x)
628 return err;
629
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700630 xfrm_state_hold(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
632 err = xfrm_state_add(x);
633 else
634 err = xfrm_state_update(x);
635
Tetsuo Handa2e710292014-04-22 21:48:30 +0900636 xfrm_audit_state_add(x, err ? 0 : 1, true);
Joy Latten161a09e2006-11-27 13:11:54 -0600637
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 if (err < 0) {
639 x->km.state = XFRM_STATE_DEAD;
Herbert Xu21380b82006-02-22 14:47:13 -0800640 __xfrm_state_put(x);
Patrick McHardy7d6dfe12005-06-18 22:45:31 -0700641 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 }
643
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700644 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000645 c.portid = nlh->nlmsg_pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -0700646 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700647
648 km_state_notify(x, &c);
Patrick McHardy7d6dfe12005-06-18 22:45:31 -0700649out:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700650 xfrm_state_put(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 return err;
652}
653
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800654static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
655 struct xfrm_usersa_id *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700656 struct nlattr **attrs,
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700657 int *errp)
658{
659 struct xfrm_state *x = NULL;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000660 struct xfrm_mark m;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700661 int err;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000662 u32 mark = xfrm_mark_get(attrs, &m);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700663
664 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
665 err = -ESRCH;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000666 x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700667 } else {
668 xfrm_address_t *saddr = NULL;
669
Thomas Graf35a7aa02007-08-22 14:00:40 -0700670 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700671 if (!saddr) {
672 err = -EINVAL;
673 goto out;
674 }
675
Masahide NAKAMURA9abbffe2006-11-24 20:34:51 -0800676 err = -ESRCH;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +0000677 x = xfrm_state_lookup_byaddr(net, mark,
678 &p->daddr, saddr,
Alexey Dobriyan221df1e2008-11-25 17:30:50 -0800679 p->proto, p->family);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700680 }
681
682 out:
683 if (!x && errp)
684 *errp = err;
685 return x;
686}
687
Christoph Hellwig22e70052007-01-02 15:22:30 -0800688static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700689 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800691 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 struct xfrm_state *x;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700693 int err = -ESRCH;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700694 struct km_event c;
Thomas Graf7b67c852007-08-22 13:53:52 -0700695 struct xfrm_usersa_id *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800697 x = xfrm_user_state_lookup(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 if (x == NULL)
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700699 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
David S. Miller6f68dc32006-06-08 23:58:52 -0700701 if ((err = security_xfrm_state_delete(x)) != 0)
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700702 goto out;
703
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 if (xfrm_state_kern(x)) {
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700705 err = -EPERM;
706 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 }
708
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700709 err = xfrm_state_delete(x);
Joy Latten161a09e2006-11-27 13:11:54 -0600710
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700711 if (err < 0)
712 goto out;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700713
714 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +0000715 c.portid = nlh->nlmsg_pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -0700716 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700717 km_state_notify(x, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700719out:
Tetsuo Handa2e710292014-04-22 21:48:30 +0900720 xfrm_audit_state_delete(x, err ? 0 : 1, true);
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700721 xfrm_state_put(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700722 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723}
724
725static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
726{
Mathias Krausef778a632012-09-19 11:33:39 +0000727 memset(p, 0, sizeof(*p));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 memcpy(&p->id, &x->id, sizeof(p->id));
729 memcpy(&p->sel, &x->sel, sizeof(p->sel));
730 memcpy(&p->lft, &x->lft, sizeof(p->lft));
731 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
Sowmini Varadhane33d4f12015-10-21 11:48:25 -0400732 put_unaligned(x->stats.replay_window, &p->stats.replay_window);
733 put_unaligned(x->stats.replay, &p->stats.replay);
734 put_unaligned(x->stats.integrity_failed, &p->stats.integrity_failed);
David S. Miller54489c142006-10-27 15:29:47 -0700735 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 p->mode = x->props.mode;
737 p->replay_window = x->props.replay_window;
738 p->reqid = x->props.reqid;
739 p->family = x->props.family;
740 p->flags = x->props.flags;
741 p->seq = x->km.seq;
742}
743
744struct xfrm_dump_info {
745 struct sk_buff *in_skb;
746 struct sk_buff *out_skb;
747 u32 nlmsg_seq;
748 u16 nlmsg_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749};
750
Thomas Grafc0144be2007-08-22 13:55:43 -0700751static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
752{
Thomas Grafc0144be2007-08-22 13:55:43 -0700753 struct xfrm_user_sec_ctx *uctx;
754 struct nlattr *attr;
Herbert Xu68325d32007-10-09 13:30:57 -0700755 int ctx_size = sizeof(*uctx) + s->ctx_len;
Thomas Grafc0144be2007-08-22 13:55:43 -0700756
757 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
758 if (attr == NULL)
759 return -EMSGSIZE;
760
761 uctx = nla_data(attr);
762 uctx->exttype = XFRMA_SEC_CTX;
763 uctx->len = ctx_size;
764 uctx->ctx_doi = s->ctx_doi;
765 uctx->ctx_alg = s->ctx_alg;
766 uctx->ctx_len = s->ctx_len;
767 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
768
769 return 0;
770}
771
Martin Willi4447bb32009-11-25 00:29:52 +0000772static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
773{
774 struct xfrm_algo *algo;
775 struct nlattr *nla;
776
777 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
778 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
779 if (!nla)
780 return -EMSGSIZE;
781
782 algo = nla_data(nla);
Mathias Krause4c873082012-09-19 11:33:38 +0000783 strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name));
Martin Willi4447bb32009-11-25 00:29:52 +0000784 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
785 algo->alg_key_len = auth->alg_key_len;
786
787 return 0;
788}
789
Herbert Xu68325d32007-10-09 13:30:57 -0700790/* Don't change this without updating xfrm_sa_len! */
791static int copy_to_user_state_extra(struct xfrm_state *x,
792 struct xfrm_usersa_info *p,
793 struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794{
David S. Miller1d1e34d2012-06-27 21:57:03 -0700795 int ret = 0;
796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 copy_to_user_state(x, p);
798
Nicolas Dichtela947b0a2013-02-22 10:54:54 +0100799 if (x->props.extra_flags) {
800 ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS,
801 x->props.extra_flags);
802 if (ret)
803 goto out;
804 }
805
David S. Miller1d1e34d2012-06-27 21:57:03 -0700806 if (x->coaddr) {
807 ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
808 if (ret)
809 goto out;
810 }
811 if (x->lastused) {
Nicolas Dichtelde95c4a2016-04-22 17:31:23 +0200812 ret = nla_put_u64_64bit(skb, XFRMA_LASTUSED, x->lastused,
813 XFRMA_PAD);
David S. Miller1d1e34d2012-06-27 21:57:03 -0700814 if (ret)
815 goto out;
816 }
817 if (x->aead) {
818 ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
819 if (ret)
820 goto out;
821 }
822 if (x->aalg) {
823 ret = copy_to_user_auth(x->aalg, skb);
824 if (!ret)
825 ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC,
826 xfrm_alg_auth_len(x->aalg), x->aalg);
827 if (ret)
828 goto out;
829 }
830 if (x->ealg) {
831 ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
832 if (ret)
833 goto out;
834 }
835 if (x->calg) {
836 ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
837 if (ret)
838 goto out;
839 }
840 if (x->encap) {
841 ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
842 if (ret)
843 goto out;
844 }
845 if (x->tfcpad) {
846 ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad);
847 if (ret)
848 goto out;
849 }
850 ret = xfrm_mark_put(skb, &x->mark);
851 if (ret)
852 goto out;
dingzhif293a5e2014-10-30 09:39:36 +0100853 if (x->replay_esn)
David S. Miller1d1e34d2012-06-27 21:57:03 -0700854 ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
855 xfrm_replay_state_esn_len(x->replay_esn),
856 x->replay_esn);
dingzhif293a5e2014-10-30 09:39:36 +0100857 else
858 ret = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
859 &x->replay);
860 if (ret)
861 goto out;
David S. Miller1d1e34d2012-06-27 21:57:03 -0700862 if (x->security)
863 ret = copy_sec_ctx(x->security, skb);
864out:
865 return ret;
Herbert Xu68325d32007-10-09 13:30:57 -0700866}
867
868static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
869{
870 struct xfrm_dump_info *sp = ptr;
871 struct sk_buff *in_skb = sp->in_skb;
872 struct sk_buff *skb = sp->out_skb;
873 struct xfrm_usersa_info *p;
874 struct nlmsghdr *nlh;
875 int err;
876
Eric W. Biederman15e47302012-09-07 20:12:54 +0000877 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
Herbert Xu68325d32007-10-09 13:30:57 -0700878 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
879 if (nlh == NULL)
880 return -EMSGSIZE;
881
882 p = nlmsg_data(nlh);
883
884 err = copy_to_user_state_extra(x, p, skb);
David S. Miller1d1e34d2012-06-27 21:57:03 -0700885 if (err) {
886 nlmsg_cancel(skb, nlh);
887 return err;
888 }
Thomas Graf98250692007-08-22 12:47:26 -0700889 nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891}
892
Timo Teras4c563f72008-02-28 21:31:08 -0800893static int xfrm_dump_sa_done(struct netlink_callback *cb)
894{
895 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
Fan Du283bc9f2013-11-07 17:47:50 +0800896 struct sock *sk = cb->skb->sk;
897 struct net *net = sock_net(sk);
898
899 xfrm_state_walk_done(walk, net);
Timo Teras4c563f72008-02-28 21:31:08 -0800900 return 0;
901}
902
Nicolas Dichteld3623092014-02-14 15:30:36 +0100903static const struct nla_policy xfrma_policy[XFRMA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
905{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800906 struct net *net = sock_net(skb->sk);
Timo Teras4c563f72008-02-28 21:31:08 -0800907 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 struct xfrm_dump_info info;
909
Timo Teras4c563f72008-02-28 21:31:08 -0800910 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
911 sizeof(cb->args) - sizeof(cb->args[0]));
912
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 info.in_skb = cb->skb;
914 info.out_skb = skb;
915 info.nlmsg_seq = cb->nlh->nlmsg_seq;
916 info.nlmsg_flags = NLM_F_MULTI;
Timo Teras4c563f72008-02-28 21:31:08 -0800917
918 if (!cb->args[0]) {
Nicolas Dichteld3623092014-02-14 15:30:36 +0100919 struct nlattr *attrs[XFRMA_MAX+1];
Nicolas Dichtel870a2df2014-03-06 18:24:29 +0100920 struct xfrm_address_filter *filter = NULL;
Nicolas Dichteld3623092014-02-14 15:30:36 +0100921 u8 proto = 0;
922 int err;
923
Timo Teras4c563f72008-02-28 21:31:08 -0800924 cb->args[0] = 1;
Nicolas Dichteld3623092014-02-14 15:30:36 +0100925
926 err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX,
927 xfrma_policy);
928 if (err < 0)
929 return err;
930
Nicolas Dichtel870a2df2014-03-06 18:24:29 +0100931 if (attrs[XFRMA_ADDRESS_FILTER]) {
Andrzej Hajdadf367562015-08-07 09:59:34 +0200932 filter = kmemdup(nla_data(attrs[XFRMA_ADDRESS_FILTER]),
933 sizeof(*filter), GFP_KERNEL);
Nicolas Dichteld3623092014-02-14 15:30:36 +0100934 if (filter == NULL)
935 return -ENOMEM;
Nicolas Dichteld3623092014-02-14 15:30:36 +0100936 }
937
938 if (attrs[XFRMA_PROTO])
939 proto = nla_get_u8(attrs[XFRMA_PROTO]);
940
941 xfrm_state_walk_init(walk, proto, filter);
Timo Teras4c563f72008-02-28 21:31:08 -0800942 }
943
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800944 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
946 return skb->len;
947}
948
949static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
950 struct xfrm_state *x, u32 seq)
951{
952 struct xfrm_dump_info info;
953 struct sk_buff *skb;
Mathias Krause864745d2012-09-13 11:41:26 +0000954 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955
Thomas Graf7deb2262007-08-22 13:57:39 -0700956 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 if (!skb)
958 return ERR_PTR(-ENOMEM);
959
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 info.in_skb = in_skb;
961 info.out_skb = skb;
962 info.nlmsg_seq = seq;
963 info.nlmsg_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964
Mathias Krause864745d2012-09-13 11:41:26 +0000965 err = dump_one_state(x, 0, &info);
966 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 kfree_skb(skb);
Mathias Krause864745d2012-09-13 11:41:26 +0000968 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 }
970
971 return skb;
972}
973
Michal Kubecek21ee5432014-06-03 10:26:06 +0200974/* A wrapper for nlmsg_multicast() checking that nlsk is still available.
975 * Must be called with RCU read lock.
976 */
977static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb,
978 u32 pid, unsigned int group)
979{
980 struct sock *nlsk = rcu_dereference(net->xfrm.nlsk);
981
982 if (nlsk)
983 return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC);
984 else
985 return -1;
986}
987
Thomas Graf7deb2262007-08-22 13:57:39 -0700988static inline size_t xfrm_spdinfo_msgsize(void)
989{
990 return NLMSG_ALIGN(4)
991 + nla_total_size(sizeof(struct xfrmu_spdinfo))
Christophe Gouault880a6fa2014-08-29 16:16:05 +0200992 + nla_total_size(sizeof(struct xfrmu_spdhinfo))
993 + nla_total_size(sizeof(struct xfrmu_spdhthresh))
994 + nla_total_size(sizeof(struct xfrmu_spdhthresh));
Thomas Graf7deb2262007-08-22 13:57:39 -0700995}
996
Alexey Dobriyane0710412010-01-23 13:37:10 +0000997static int build_spdinfo(struct sk_buff *skb, struct net *net,
Eric W. Biederman15e47302012-09-07 20:12:54 +0000998 u32 portid, u32 seq, u32 flags)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700999{
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -07001000 struct xfrmk_spdinfo si;
1001 struct xfrmu_spdinfo spc;
1002 struct xfrmu_spdhinfo sph;
Christophe Gouault880a6fa2014-08-29 16:16:05 +02001003 struct xfrmu_spdhthresh spt4, spt6;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001004 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07001005 int err;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001006 u32 *f;
Christophe Gouault880a6fa2014-08-29 16:16:05 +02001007 unsigned lseq;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001008
Eric W. Biederman15e47302012-09-07 20:12:54 +00001009 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001010 if (nlh == NULL) /* shouldn't really happen ... */
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001011 return -EMSGSIZE;
1012
1013 f = nlmsg_data(nlh);
1014 *f = flags;
Alexey Dobriyane0710412010-01-23 13:37:10 +00001015 xfrm_spd_getinfo(net, &si);
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -07001016 spc.incnt = si.incnt;
1017 spc.outcnt = si.outcnt;
1018 spc.fwdcnt = si.fwdcnt;
1019 spc.inscnt = si.inscnt;
1020 spc.outscnt = si.outscnt;
1021 spc.fwdscnt = si.fwdscnt;
1022 sph.spdhcnt = si.spdhcnt;
1023 sph.spdhmcnt = si.spdhmcnt;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001024
Christophe Gouault880a6fa2014-08-29 16:16:05 +02001025 do {
1026 lseq = read_seqbegin(&net->xfrm.policy_hthresh.lock);
1027
1028 spt4.lbits = net->xfrm.policy_hthresh.lbits4;
1029 spt4.rbits = net->xfrm.policy_hthresh.rbits4;
1030 spt6.lbits = net->xfrm.policy_hthresh.lbits6;
1031 spt6.rbits = net->xfrm.policy_hthresh.rbits6;
1032 } while (read_seqretry(&net->xfrm.policy_hthresh.lock, lseq));
1033
David S. Miller1d1e34d2012-06-27 21:57:03 -07001034 err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
1035 if (!err)
1036 err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
Christophe Gouault880a6fa2014-08-29 16:16:05 +02001037 if (!err)
1038 err = nla_put(skb, XFRMA_SPD_IPV4_HTHRESH, sizeof(spt4), &spt4);
1039 if (!err)
1040 err = nla_put(skb, XFRMA_SPD_IPV6_HTHRESH, sizeof(spt6), &spt6);
David S. Miller1d1e34d2012-06-27 21:57:03 -07001041 if (err) {
1042 nlmsg_cancel(skb, nlh);
1043 return err;
1044 }
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001045
Johannes Berg053c0952015-01-16 22:09:00 +01001046 nlmsg_end(skb, nlh);
1047 return 0;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001048}
1049
Christophe Gouault880a6fa2014-08-29 16:16:05 +02001050static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
1051 struct nlattr **attrs)
1052{
1053 struct net *net = sock_net(skb->sk);
1054 struct xfrmu_spdhthresh *thresh4 = NULL;
1055 struct xfrmu_spdhthresh *thresh6 = NULL;
1056
1057 /* selector prefixlen thresholds to hash policies */
1058 if (attrs[XFRMA_SPD_IPV4_HTHRESH]) {
1059 struct nlattr *rta = attrs[XFRMA_SPD_IPV4_HTHRESH];
1060
1061 if (nla_len(rta) < sizeof(*thresh4))
1062 return -EINVAL;
1063 thresh4 = nla_data(rta);
1064 if (thresh4->lbits > 32 || thresh4->rbits > 32)
1065 return -EINVAL;
1066 }
1067 if (attrs[XFRMA_SPD_IPV6_HTHRESH]) {
1068 struct nlattr *rta = attrs[XFRMA_SPD_IPV6_HTHRESH];
1069
1070 if (nla_len(rta) < sizeof(*thresh6))
1071 return -EINVAL;
1072 thresh6 = nla_data(rta);
1073 if (thresh6->lbits > 128 || thresh6->rbits > 128)
1074 return -EINVAL;
1075 }
1076
1077 if (thresh4 || thresh6) {
1078 write_seqlock(&net->xfrm.policy_hthresh.lock);
1079 if (thresh4) {
1080 net->xfrm.policy_hthresh.lbits4 = thresh4->lbits;
1081 net->xfrm.policy_hthresh.rbits4 = thresh4->rbits;
1082 }
1083 if (thresh6) {
1084 net->xfrm.policy_hthresh.lbits6 = thresh6->lbits;
1085 net->xfrm.policy_hthresh.rbits6 = thresh6->rbits;
1086 }
1087 write_sequnlock(&net->xfrm.policy_hthresh.lock);
1088
1089 xfrm_policy_hash_rebuild(net);
1090 }
1091
1092 return 0;
1093}
1094
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001095static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001096 struct nlattr **attrs)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001097{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001098 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001099 struct sk_buff *r_skb;
Thomas Graf7b67c852007-08-22 13:53:52 -07001100 u32 *flags = nlmsg_data(nlh);
Eric W. Biederman15e47302012-09-07 20:12:54 +00001101 u32 sportid = NETLINK_CB(skb).portid;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001102 u32 seq = nlh->nlmsg_seq;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001103
Thomas Graf7deb2262007-08-22 13:57:39 -07001104 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001105 if (r_skb == NULL)
1106 return -ENOMEM;
1107
Eric W. Biederman15e47302012-09-07 20:12:54 +00001108 if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001109 BUG();
1110
Eric W. Biederman15e47302012-09-07 20:12:54 +00001111 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07001112}
1113
Thomas Graf7deb2262007-08-22 13:57:39 -07001114static inline size_t xfrm_sadinfo_msgsize(void)
1115{
1116 return NLMSG_ALIGN(4)
1117 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
1118 + nla_total_size(4); /* XFRMA_SAD_CNT */
1119}
1120
Alexey Dobriyane0710412010-01-23 13:37:10 +00001121static int build_sadinfo(struct sk_buff *skb, struct net *net,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001122 u32 portid, u32 seq, u32 flags)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001123{
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -07001124 struct xfrmk_sadinfo si;
1125 struct xfrmu_sadhinfo sh;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001126 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07001127 int err;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001128 u32 *f;
1129
Eric W. Biederman15e47302012-09-07 20:12:54 +00001130 nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001131 if (nlh == NULL) /* shouldn't really happen ... */
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001132 return -EMSGSIZE;
1133
1134 f = nlmsg_data(nlh);
1135 *f = flags;
Alexey Dobriyane0710412010-01-23 13:37:10 +00001136 xfrm_sad_getinfo(net, &si);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001137
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -07001138 sh.sadhmcnt = si.sadhmcnt;
1139 sh.sadhcnt = si.sadhcnt;
1140
David S. Miller1d1e34d2012-06-27 21:57:03 -07001141 err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt);
1142 if (!err)
1143 err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
1144 if (err) {
1145 nlmsg_cancel(skb, nlh);
1146 return err;
1147 }
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001148
Johannes Berg053c0952015-01-16 22:09:00 +01001149 nlmsg_end(skb, nlh);
1150 return 0;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001151}
1152
1153static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001154 struct nlattr **attrs)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001155{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001156 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001157 struct sk_buff *r_skb;
Thomas Graf7b67c852007-08-22 13:53:52 -07001158 u32 *flags = nlmsg_data(nlh);
Eric W. Biederman15e47302012-09-07 20:12:54 +00001159 u32 sportid = NETLINK_CB(skb).portid;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001160 u32 seq = nlh->nlmsg_seq;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001161
Thomas Graf7deb2262007-08-22 13:57:39 -07001162 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001163 if (r_skb == NULL)
1164 return -ENOMEM;
1165
Eric W. Biederman15e47302012-09-07 20:12:54 +00001166 if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001167 BUG();
1168
Eric W. Biederman15e47302012-09-07 20:12:54 +00001169 return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -07001170}
1171
Christoph Hellwig22e70052007-01-02 15:22:30 -08001172static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001173 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001175 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -07001176 struct xfrm_usersa_id *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 struct xfrm_state *x;
1178 struct sk_buff *resp_skb;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -07001179 int err = -ESRCH;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001181 x = xfrm_user_state_lookup(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 if (x == NULL)
1183 goto out_noput;
1184
1185 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
1186 if (IS_ERR(resp_skb)) {
1187 err = PTR_ERR(resp_skb);
1188 } else {
Eric W. Biederman15e47302012-09-07 20:12:54 +00001189 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 }
1191 xfrm_state_put(x);
1192out_noput:
1193 return err;
1194}
1195
Christoph Hellwig22e70052007-01-02 15:22:30 -08001196static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001197 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001199 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 struct xfrm_state *x;
1201 struct xfrm_userspi_info *p;
1202 struct sk_buff *resp_skb;
1203 xfrm_address_t *daddr;
1204 int family;
1205 int err;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001206 u32 mark;
1207 struct xfrm_mark m;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208
Thomas Graf7b67c852007-08-22 13:53:52 -07001209 p = nlmsg_data(nlh);
Fan Du776e9dd2013-12-16 18:47:49 +08001210 err = verify_spi_info(p->info.id.proto, p->min, p->max);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 if (err)
1212 goto out_noput;
1213
1214 family = p->info.family;
1215 daddr = &p->info.id.daddr;
1216
1217 x = NULL;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001218
1219 mark = xfrm_mark_get(attrs, &m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 if (p->info.seq) {
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001221 x = xfrm_find_acq_byseq(net, mark, p->info.seq);
YOSHIFUJI Hideaki / 吉藤英明70e94e62013-01-29 12:48:50 +00001222 if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 xfrm_state_put(x);
1224 x = NULL;
1225 }
1226 }
1227
1228 if (!x)
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001229 x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 p->info.id.proto, daddr,
1231 &p->info.saddr, 1,
1232 family);
1233 err = -ENOENT;
1234 if (x == NULL)
1235 goto out_noput;
1236
Herbert Xu658b2192007-10-09 13:29:52 -07001237 err = xfrm_alloc_spi(x, p->min, p->max);
1238 if (err)
1239 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240
Herbert Xu658b2192007-10-09 13:29:52 -07001241 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 if (IS_ERR(resp_skb)) {
1243 err = PTR_ERR(resp_skb);
1244 goto out;
1245 }
1246
Eric W. Biederman15e47302012-09-07 20:12:54 +00001247 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
1249out:
1250 xfrm_state_put(x);
1251out_noput:
1252 return err;
1253}
1254
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001255static int verify_policy_dir(u8 dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256{
1257 switch (dir) {
1258 case XFRM_POLICY_IN:
1259 case XFRM_POLICY_OUT:
1260 case XFRM_POLICY_FWD:
1261 break;
1262
1263 default:
1264 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001265 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266
1267 return 0;
1268}
1269
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001270static int verify_policy_type(u8 type)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001271{
1272 switch (type) {
1273 case XFRM_POLICY_TYPE_MAIN:
1274#ifdef CONFIG_XFRM_SUB_POLICY
1275 case XFRM_POLICY_TYPE_SUB:
1276#endif
1277 break;
1278
1279 default:
1280 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001281 }
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001282
1283 return 0;
1284}
1285
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1287{
Fan Due682adf2013-11-07 17:47:48 +08001288 int ret;
1289
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 switch (p->share) {
1291 case XFRM_SHARE_ANY:
1292 case XFRM_SHARE_SESSION:
1293 case XFRM_SHARE_USER:
1294 case XFRM_SHARE_UNIQUE:
1295 break;
1296
1297 default:
1298 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001299 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300
1301 switch (p->action) {
1302 case XFRM_POLICY_ALLOW:
1303 case XFRM_POLICY_BLOCK:
1304 break;
1305
1306 default:
1307 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001308 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
1310 switch (p->sel.family) {
1311 case AF_INET:
1312 break;
1313
1314 case AF_INET6:
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001315#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 break;
1317#else
1318 return -EAFNOSUPPORT;
1319#endif
1320
1321 default:
1322 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001323 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324
Fan Due682adf2013-11-07 17:47:48 +08001325 ret = verify_policy_dir(p->dir);
1326 if (ret)
1327 return ret;
1328 if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir))
1329 return -EINVAL;
1330
1331 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332}
1333
Thomas Graf5424f322007-08-22 14:01:33 -07001334static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
Trent Jaegerdf718372005-12-13 23:12:27 -08001335{
Thomas Graf5424f322007-08-22 14:01:33 -07001336 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Trent Jaegerdf718372005-12-13 23:12:27 -08001337 struct xfrm_user_sec_ctx *uctx;
1338
1339 if (!rt)
1340 return 0;
1341
Thomas Graf5424f322007-08-22 14:01:33 -07001342 uctx = nla_data(rt);
Nikolay Aleksandrov52a4c642014-03-07 12:44:19 +01001343 return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL);
Trent Jaegerdf718372005-12-13 23:12:27 -08001344}
1345
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1347 int nr)
1348{
1349 int i;
1350
1351 xp->xfrm_nr = nr;
1352 for (i = 0; i < nr; i++, ut++) {
1353 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1354
1355 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1356 memcpy(&t->saddr, &ut->saddr,
1357 sizeof(xfrm_address_t));
1358 t->reqid = ut->reqid;
1359 t->mode = ut->mode;
1360 t->share = ut->share;
1361 t->optional = ut->optional;
1362 t->aalgos = ut->aalgos;
1363 t->ealgos = ut->ealgos;
1364 t->calgos = ut->calgos;
Herbert Xuc5d18e92008-04-22 00:46:42 -07001365 /* If all masks are ~0, then we allow all algorithms. */
1366 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
Miika Komu8511d012006-11-30 16:40:51 -08001367 t->encap_family = ut->family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 }
1369}
1370
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001371static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1372{
1373 int i;
1374
1375 if (nr > XFRM_MAX_DEPTH)
1376 return -EINVAL;
1377
1378 for (i = 0; i < nr; i++) {
1379 /* We never validated the ut->family value, so many
1380 * applications simply leave it at zero. The check was
1381 * never made and ut->family was ignored because all
1382 * templates could be assumed to have the same family as
1383 * the policy itself. Now that we will have ipv4-in-ipv6
1384 * and ipv6-in-ipv4 tunnels, this is no longer true.
1385 */
1386 if (!ut[i].family)
1387 ut[i].family = family;
1388
1389 switch (ut[i].family) {
1390 case AF_INET:
1391 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001392#if IS_ENABLED(CONFIG_IPV6)
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001393 case AF_INET6:
1394 break;
1395#endif
1396 default:
1397 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001398 }
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001399 }
1400
1401 return 0;
1402}
1403
Thomas Graf5424f322007-08-22 14:01:33 -07001404static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405{
Thomas Graf5424f322007-08-22 14:01:33 -07001406 struct nlattr *rt = attrs[XFRMA_TMPL];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407
1408 if (!rt) {
1409 pol->xfrm_nr = 0;
1410 } else {
Thomas Graf5424f322007-08-22 14:01:33 -07001411 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1412 int nr = nla_len(rt) / sizeof(*utmpl);
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001413 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001415 err = validate_tmpl(nr, utmpl, pol->family);
1416 if (err)
1417 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418
Thomas Graf5424f322007-08-22 14:01:33 -07001419 copy_templates(pol, utmpl, nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 }
1421 return 0;
1422}
1423
Thomas Graf5424f322007-08-22 14:01:33 -07001424static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001425{
Thomas Graf5424f322007-08-22 14:01:33 -07001426 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001427 struct xfrm_userpolicy_type *upt;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001428 u8 type = XFRM_POLICY_TYPE_MAIN;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001429 int err;
1430
1431 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001432 upt = nla_data(rt);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001433 type = upt->type;
1434 }
1435
1436 err = verify_policy_type(type);
1437 if (err)
1438 return err;
1439
1440 *tp = type;
1441 return 0;
1442}
1443
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1445{
1446 xp->priority = p->priority;
1447 xp->index = p->index;
1448 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1449 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1450 xp->action = p->action;
1451 xp->flags = p->flags;
1452 xp->family = p->sel.family;
1453 /* XXX xp->share = p->share; */
1454}
1455
1456static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1457{
Mathias Krause7b789832012-09-19 11:33:40 +00001458 memset(p, 0, sizeof(*p));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1460 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1461 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1462 p->priority = xp->priority;
1463 p->index = xp->index;
1464 p->sel.family = xp->family;
1465 p->dir = dir;
1466 p->action = xp->action;
1467 p->flags = xp->flags;
1468 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1469}
1470
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001471static 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 -07001472{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001473 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 int err;
1475
1476 if (!xp) {
1477 *errp = -ENOMEM;
1478 return NULL;
1479 }
1480
1481 copy_from_user_policy(xp, p);
Trent Jaegerdf718372005-12-13 23:12:27 -08001482
Thomas Graf35a7aa02007-08-22 14:00:40 -07001483 err = copy_from_user_policy_type(&xp->type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001484 if (err)
1485 goto error;
1486
Thomas Graf35a7aa02007-08-22 14:00:40 -07001487 if (!(err = copy_from_user_tmpl(xp, attrs)))
1488 err = copy_from_user_sec_ctx(xp, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001489 if (err)
1490 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001492 xfrm_mark_get(attrs, &xp->mark);
1493
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 return xp;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001495 error:
1496 *errp = err;
Herbert Xu12a169e2008-10-01 07:03:24 -07001497 xp->walk.dead = 1;
WANG Cong64c31b32008-01-07 22:34:29 -08001498 xfrm_policy_destroy(xp);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001499 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500}
1501
Christoph Hellwig22e70052007-01-02 15:22:30 -08001502static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001503 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001505 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -07001506 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 struct xfrm_policy *xp;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001508 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509 int err;
1510 int excl;
1511
1512 err = verify_newpolicy_info(p);
1513 if (err)
1514 return err;
Thomas Graf35a7aa02007-08-22 14:00:40 -07001515 err = verify_sec_ctx_len(attrs);
Trent Jaegerdf718372005-12-13 23:12:27 -08001516 if (err)
1517 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001519 xp = xfrm_policy_construct(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520 if (!xp)
1521 return err;
1522
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001523 /* shouldn't excl be based on nlh flags??
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001524 * Aha! this is anti-netlink really i.e more pfkey derived
1525 * in netlink excl is a flag and you wouldnt need
1526 * a type XFRM_MSG_UPDPOLICY - JHS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1528 err = xfrm_policy_insert(p->dir, xp, excl);
Tetsuo Handa2e710292014-04-22 21:48:30 +09001529 xfrm_audit_policy_add(xp, err ? 0 : 1, true);
Joy Latten161a09e2006-11-27 13:11:54 -06001530
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 if (err) {
Paul Moore03e1ad72008-04-12 19:07:52 -07001532 security_xfrm_policy_free(xp->security);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533 kfree(xp);
1534 return err;
1535 }
1536
Herbert Xuf60f6b82005-06-18 22:44:37 -07001537 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001538 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001539 c.portid = nlh->nlmsg_pid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001540 km_policy_notify(xp, p->dir, &c);
1541
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 xfrm_pol_put(xp);
1543
1544 return 0;
1545}
1546
1547static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1548{
1549 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1550 int i;
1551
1552 if (xp->xfrm_nr == 0)
1553 return 0;
1554
1555 for (i = 0; i < xp->xfrm_nr; i++) {
1556 struct xfrm_user_tmpl *up = &vec[i];
1557 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1558
Mathias Krause1f868402012-09-19 11:33:41 +00001559 memset(up, 0, sizeof(*up));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 memcpy(&up->id, &kp->id, sizeof(up->id));
Miika Komu8511d012006-11-30 16:40:51 -08001561 up->family = kp->encap_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001562 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1563 up->reqid = kp->reqid;
1564 up->mode = kp->mode;
1565 up->share = kp->share;
1566 up->optional = kp->optional;
1567 up->aalgos = kp->aalgos;
1568 up->ealgos = kp->ealgos;
1569 up->calgos = kp->calgos;
1570 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571
Thomas Grafc0144be2007-08-22 13:55:43 -07001572 return nla_put(skb, XFRMA_TMPL,
1573 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
Trent Jaegerdf718372005-12-13 23:12:27 -08001574}
1575
Serge Hallyn0d681622006-07-24 23:30:44 -07001576static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1577{
1578 if (x->security) {
1579 return copy_sec_ctx(x->security, skb);
1580 }
1581 return 0;
1582}
1583
1584static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1585{
David S. Miller1d1e34d2012-06-27 21:57:03 -07001586 if (xp->security)
Serge Hallyn0d681622006-07-24 23:30:44 -07001587 return copy_sec_ctx(xp->security, skb);
Serge Hallyn0d681622006-07-24 23:30:44 -07001588 return 0;
1589}
Thomas Grafcfbfd452007-08-22 13:57:04 -07001590static inline size_t userpolicy_type_attrsize(void)
1591{
1592#ifdef CONFIG_XFRM_SUB_POLICY
1593 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1594#else
1595 return 0;
1596#endif
1597}
Serge Hallyn0d681622006-07-24 23:30:44 -07001598
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001599#ifdef CONFIG_XFRM_SUB_POLICY
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001600static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001601{
Thomas Grafc0144be2007-08-22 13:55:43 -07001602 struct xfrm_userpolicy_type upt = {
1603 .type = type,
1604 };
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001605
Thomas Grafc0144be2007-08-22 13:55:43 -07001606 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001607}
1608
1609#else
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001610static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001611{
1612 return 0;
1613}
1614#endif
1615
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1617{
1618 struct xfrm_dump_info *sp = ptr;
1619 struct xfrm_userpolicy_info *p;
1620 struct sk_buff *in_skb = sp->in_skb;
1621 struct sk_buff *skb = sp->out_skb;
1622 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07001623 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624
Eric W. Biederman15e47302012-09-07 20:12:54 +00001625 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq,
Thomas Graf79b8b7f2007-08-22 12:46:53 -07001626 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1627 if (nlh == NULL)
1628 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629
Thomas Graf7b67c852007-08-22 13:53:52 -07001630 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631 copy_to_user_policy(xp, p, dir);
David S. Miller1d1e34d2012-06-27 21:57:03 -07001632 err = copy_to_user_tmpl(xp, skb);
1633 if (!err)
1634 err = copy_to_user_sec_ctx(xp, skb);
1635 if (!err)
1636 err = copy_to_user_policy_type(xp->type, skb);
1637 if (!err)
1638 err = xfrm_mark_put(skb, &xp->mark);
1639 if (err) {
1640 nlmsg_cancel(skb, nlh);
1641 return err;
1642 }
Thomas Graf98250692007-08-22 12:47:26 -07001643 nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645}
1646
Timo Teras4c563f72008-02-28 21:31:08 -08001647static int xfrm_dump_policy_done(struct netlink_callback *cb)
1648{
1649 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
Fan Du283bc9f2013-11-07 17:47:50 +08001650 struct net *net = sock_net(cb->skb->sk);
Timo Teras4c563f72008-02-28 21:31:08 -08001651
Fan Du283bc9f2013-11-07 17:47:50 +08001652 xfrm_policy_walk_done(walk, net);
Timo Teras4c563f72008-02-28 21:31:08 -08001653 return 0;
1654}
1655
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1657{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001658 struct net *net = sock_net(skb->sk);
Timo Teras4c563f72008-02-28 21:31:08 -08001659 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660 struct xfrm_dump_info info;
1661
Timo Teras4c563f72008-02-28 21:31:08 -08001662 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1663 sizeof(cb->args) - sizeof(cb->args[0]));
1664
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 info.in_skb = cb->skb;
1666 info.out_skb = skb;
1667 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1668 info.nlmsg_flags = NLM_F_MULTI;
Timo Teras4c563f72008-02-28 21:31:08 -08001669
1670 if (!cb->args[0]) {
1671 cb->args[0] = 1;
1672 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1673 }
1674
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001675 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676
1677 return skb->len;
1678}
1679
1680static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1681 struct xfrm_policy *xp,
1682 int dir, u32 seq)
1683{
1684 struct xfrm_dump_info info;
1685 struct sk_buff *skb;
Mathias Krausec2546372012-09-14 09:58:32 +00001686 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687
Thomas Graf7deb2262007-08-22 13:57:39 -07001688 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 if (!skb)
1690 return ERR_PTR(-ENOMEM);
1691
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692 info.in_skb = in_skb;
1693 info.out_skb = skb;
1694 info.nlmsg_seq = seq;
1695 info.nlmsg_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696
Mathias Krausec2546372012-09-14 09:58:32 +00001697 err = dump_one_policy(xp, dir, 0, &info);
1698 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 kfree_skb(skb);
Mathias Krausec2546372012-09-14 09:58:32 +00001700 return ERR_PTR(err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 }
1702
1703 return skb;
1704}
1705
Christoph Hellwig22e70052007-01-02 15:22:30 -08001706static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001707 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001709 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710 struct xfrm_policy *xp;
1711 struct xfrm_userpolicy_id *p;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001712 u8 type = XFRM_POLICY_TYPE_MAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001714 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 int delete;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001716 struct xfrm_mark m;
1717 u32 mark = xfrm_mark_get(attrs, &m);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718
Thomas Graf7b67c852007-08-22 13:53:52 -07001719 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1721
Thomas Graf35a7aa02007-08-22 14:00:40 -07001722 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001723 if (err)
1724 return err;
1725
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 err = verify_policy_dir(p->dir);
1727 if (err)
1728 return err;
1729
1730 if (p->index)
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001731 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err);
Trent Jaegerdf718372005-12-13 23:12:27 -08001732 else {
Thomas Graf5424f322007-08-22 14:01:33 -07001733 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Paul Moore03e1ad72008-04-12 19:07:52 -07001734 struct xfrm_sec_ctx *ctx;
Trent Jaegerdf718372005-12-13 23:12:27 -08001735
Thomas Graf35a7aa02007-08-22 14:00:40 -07001736 err = verify_sec_ctx_len(attrs);
Trent Jaegerdf718372005-12-13 23:12:27 -08001737 if (err)
1738 return err;
1739
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001740 ctx = NULL;
Trent Jaegerdf718372005-12-13 23:12:27 -08001741 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001742 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
Trent Jaegerdf718372005-12-13 23:12:27 -08001743
Nikolay Aleksandrov52a4c642014-03-07 12:44:19 +01001744 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
Paul Moore03e1ad72008-04-12 19:07:52 -07001745 if (err)
Trent Jaegerdf718372005-12-13 23:12:27 -08001746 return err;
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001747 }
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00001748 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel,
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001749 ctx, delete, &err);
Paul Moore03e1ad72008-04-12 19:07:52 -07001750 security_xfrm_policy_free(ctx);
Trent Jaegerdf718372005-12-13 23:12:27 -08001751 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752 if (xp == NULL)
1753 return -ENOENT;
1754
1755 if (!delete) {
1756 struct sk_buff *resp_skb;
1757
1758 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1759 if (IS_ERR(resp_skb)) {
1760 err = PTR_ERR(resp_skb);
1761 } else {
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001762 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
Eric W. Biederman15e47302012-09-07 20:12:54 +00001763 NETLINK_CB(skb).portid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001765 } else {
Tetsuo Handa2e710292014-04-22 21:48:30 +09001766 xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
David S. Miller13fcfbb02007-02-12 13:53:54 -08001767
1768 if (err != 0)
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001769 goto out;
David S. Miller13fcfbb02007-02-12 13:53:54 -08001770
Herbert Xue7443892005-06-18 22:44:18 -07001771 c.data.byid = p->index;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001772 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001773 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001774 c.portid = nlh->nlmsg_pid;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001775 km_policy_notify(xp, p->dir, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776 }
1777
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001778out:
Eric Parisef41aaa2007-03-07 15:37:58 -08001779 xfrm_pol_put(xp);
Paul Mooree4c17212013-05-29 07:36:25 +00001780 if (delete && err == 0)
1781 xfrm_garbage_collect(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782 return err;
1783}
1784
Christoph Hellwig22e70052007-01-02 15:22:30 -08001785static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001786 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001788 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001789 struct km_event c;
Thomas Graf7b67c852007-08-22 13:53:52 -07001790 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
Joy Latten4aa2e622007-06-04 19:05:57 -04001791 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792
Tetsuo Handa2e710292014-04-22 21:48:30 +09001793 err = xfrm_state_flush(net, p->proto, true);
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +00001794 if (err) {
1795 if (err == -ESRCH) /* empty table */
1796 return 0;
David S. Miller069c4742010-02-17 13:41:40 -08001797 return err;
Jamal Hadi Salim9e64cc92010-02-19 02:00:41 +00001798 }
Herbert Xubf088672005-06-18 22:44:00 -07001799 c.data.proto = p->proto;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001800 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001801 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001802 c.portid = nlh->nlmsg_pid;
Alexey Dobriyan70678022008-11-25 17:50:36 -08001803 c.net = net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001804 km_state_notify(NULL, &c);
1805
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 return 0;
1807}
1808
Steffen Klassertd8647b72011-03-08 00:10:27 +00001809static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x)
Thomas Graf7deb2262007-08-22 13:57:39 -07001810{
Steffen Klassertd8647b72011-03-08 00:10:27 +00001811 size_t replay_size = x->replay_esn ?
1812 xfrm_replay_state_esn_len(x->replay_esn) :
1813 sizeof(struct xfrm_replay_state);
1814
Thomas Graf7deb2262007-08-22 13:57:39 -07001815 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
Steffen Klassertd8647b72011-03-08 00:10:27 +00001816 + nla_total_size(replay_size)
Nicolas Dichtelde95c4a2016-04-22 17:31:23 +02001817 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur))
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001818 + nla_total_size(sizeof(struct xfrm_mark))
Thomas Graf7deb2262007-08-22 13:57:39 -07001819 + nla_total_size(4) /* XFRM_AE_RTHR */
1820 + nla_total_size(4); /* XFRM_AE_ETHR */
1821}
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001822
David S. Miller214e0052011-02-24 00:02:38 -05001823static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001824{
1825 struct xfrm_aevent_id *id;
1826 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07001827 int err;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001828
Eric W. Biederman15e47302012-09-07 20:12:54 +00001829 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
Thomas Graf79b8b7f2007-08-22 12:46:53 -07001830 if (nlh == NULL)
1831 return -EMSGSIZE;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001832
Thomas Graf7b67c852007-08-22 13:53:52 -07001833 id = nlmsg_data(nlh);
Weilong Chen9b7a7872013-12-24 09:43:46 +08001834 memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr));
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001835 id->sa_id.spi = x->id.spi;
1836 id->sa_id.family = x->props.family;
1837 id->sa_id.proto = x->id.proto;
Weilong Chen9b7a7872013-12-24 09:43:46 +08001838 memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr));
Jamal Hadi Salim2b5f6dc2006-12-02 22:22:25 -08001839 id->reqid = x->props.reqid;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001840 id->flags = c->data.aevent;
1841
David S. Millerd0fde792012-03-29 04:02:26 -04001842 if (x->replay_esn) {
David S. Miller1d1e34d2012-06-27 21:57:03 -07001843 err = nla_put(skb, XFRMA_REPLAY_ESN_VAL,
1844 xfrm_replay_state_esn_len(x->replay_esn),
1845 x->replay_esn);
David S. Millerd0fde792012-03-29 04:02:26 -04001846 } else {
David S. Miller1d1e34d2012-06-27 21:57:03 -07001847 err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay),
1848 &x->replay);
David S. Millerd0fde792012-03-29 04:02:26 -04001849 }
David S. Miller1d1e34d2012-06-27 21:57:03 -07001850 if (err)
1851 goto out_cancel;
Nicolas Dichtelde95c4a2016-04-22 17:31:23 +02001852 err = nla_put_64bit(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft,
1853 XFRMA_PAD);
David S. Miller1d1e34d2012-06-27 21:57:03 -07001854 if (err)
1855 goto out_cancel;
Steffen Klassertd8647b72011-03-08 00:10:27 +00001856
David S. Miller1d1e34d2012-06-27 21:57:03 -07001857 if (id->flags & XFRM_AE_RTHR) {
1858 err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
1859 if (err)
1860 goto out_cancel;
1861 }
1862 if (id->flags & XFRM_AE_ETHR) {
1863 err = nla_put_u32(skb, XFRMA_ETIMER_THRESH,
1864 x->replay_maxage * 10 / HZ);
1865 if (err)
1866 goto out_cancel;
1867 }
1868 err = xfrm_mark_put(skb, &x->mark);
1869 if (err)
1870 goto out_cancel;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001871
Johannes Berg053c0952015-01-16 22:09:00 +01001872 nlmsg_end(skb, nlh);
1873 return 0;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001874
David S. Miller1d1e34d2012-06-27 21:57:03 -07001875out_cancel:
Thomas Graf98250692007-08-22 12:47:26 -07001876 nlmsg_cancel(skb, nlh);
David S. Miller1d1e34d2012-06-27 21:57:03 -07001877 return err;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001878}
1879
Christoph Hellwig22e70052007-01-02 15:22:30 -08001880static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001881 struct nlattr **attrs)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001882{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001883 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001884 struct xfrm_state *x;
1885 struct sk_buff *r_skb;
1886 int err;
1887 struct km_event c;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001888 u32 mark;
1889 struct xfrm_mark m;
Thomas Graf7b67c852007-08-22 13:53:52 -07001890 struct xfrm_aevent_id *p = nlmsg_data(nlh);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001891 struct xfrm_usersa_id *id = &p->sa_id;
1892
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001893 mark = xfrm_mark_get(attrs, &m);
1894
1895 x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family);
Steffen Klassertd8647b72011-03-08 00:10:27 +00001896 if (x == NULL)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001897 return -ESRCH;
Steffen Klassertd8647b72011-03-08 00:10:27 +00001898
1899 r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
1900 if (r_skb == NULL) {
1901 xfrm_state_put(x);
1902 return -ENOMEM;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001903 }
1904
1905 /*
1906 * XXX: is this lock really needed - none of the other
1907 * gets lock (the concern is things getting updated
1908 * while we are still reading) - jhs
1909 */
1910 spin_lock_bh(&x->lock);
1911 c.data.aevent = p->flags;
1912 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001913 c.portid = nlh->nlmsg_pid;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001914
1915 if (build_aevent(r_skb, x, &c) < 0)
1916 BUG();
Eric W. Biederman15e47302012-09-07 20:12:54 +00001917 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001918 spin_unlock_bh(&x->lock);
1919 xfrm_state_put(x);
1920 return err;
1921}
1922
Christoph Hellwig22e70052007-01-02 15:22:30 -08001923static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001924 struct nlattr **attrs)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001925{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001926 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001927 struct xfrm_state *x;
1928 struct km_event c;
Weilong Chen02d08922013-12-24 09:43:48 +08001929 int err = -EINVAL;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001930 u32 mark = 0;
1931 struct xfrm_mark m;
Thomas Graf7b67c852007-08-22 13:53:52 -07001932 struct xfrm_aevent_id *p = nlmsg_data(nlh);
Thomas Graf5424f322007-08-22 14:01:33 -07001933 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
Steffen Klassertd8647b72011-03-08 00:10:27 +00001934 struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL];
Thomas Graf5424f322007-08-22 14:01:33 -07001935 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
Michael Rossberg4e077232015-09-29 11:25:08 +02001936 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
1937 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001938
Michael Rossberg4e077232015-09-29 11:25:08 +02001939 if (!lt && !rp && !re && !et && !rt)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001940 return err;
1941
1942 /* pedantic mode - thou shalt sayeth replaceth */
1943 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1944 return err;
1945
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00001946 mark = xfrm_mark_get(attrs, &m);
1947
1948 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 -08001949 if (x == NULL)
1950 return -ESRCH;
1951
1952 if (x->km.state != XFRM_STATE_VALID)
1953 goto out;
1954
Steffen Klassert4479ff72013-09-09 09:39:01 +02001955 err = xfrm_replay_verify_len(x->replay_esn, re);
Steffen Klasserte2b19122011-03-28 19:47:30 +00001956 if (err)
1957 goto out;
1958
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001959 spin_lock_bh(&x->lock);
Mathias Krausee3ac1042012-09-19 11:33:43 +00001960 xfrm_update_ae_params(x, attrs, 1);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001961 spin_unlock_bh(&x->lock);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001962
1963 c.event = nlh->nlmsg_type;
1964 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001965 c.portid = nlh->nlmsg_pid;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001966 c.data.aevent = XFRM_AE_CU;
1967 km_state_notify(x, &c);
1968 err = 0;
1969out:
1970 xfrm_state_put(x);
1971 return err;
1972}
1973
Christoph Hellwig22e70052007-01-02 15:22:30 -08001974static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001975 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001977 struct net *net = sock_net(skb->sk);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001978 struct km_event c;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001979 u8 type = XFRM_POLICY_TYPE_MAIN;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001980 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001981
Thomas Graf35a7aa02007-08-22 14:00:40 -07001982 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001983 if (err)
1984 return err;
1985
Tetsuo Handa2e710292014-04-22 21:48:30 +09001986 err = xfrm_policy_flush(net, type, true);
Jamal Hadi Salim2f1eb652010-02-19 02:00:42 +00001987 if (err) {
1988 if (err == -ESRCH) /* empty table */
1989 return 0;
David S. Miller069c4742010-02-17 13:41:40 -08001990 return err;
Jamal Hadi Salim2f1eb652010-02-19 02:00:42 +00001991 }
1992
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001993 c.data.type = type;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001994 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001995 c.seq = nlh->nlmsg_seq;
Eric W. Biederman15e47302012-09-07 20:12:54 +00001996 c.portid = nlh->nlmsg_pid;
Alexey Dobriyan70678022008-11-25 17:50:36 -08001997 c.net = net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001998 km_policy_notify(NULL, 0, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999 return 0;
2000}
2001
Christoph Hellwig22e70052007-01-02 15:22:30 -08002002static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07002003 struct nlattr **attrs)
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002004{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002005 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002006 struct xfrm_policy *xp;
Thomas Graf7b67c852007-08-22 13:53:52 -07002007 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002008 struct xfrm_userpolicy_info *p = &up->pol;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08002009 u8 type = XFRM_POLICY_TYPE_MAIN;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002010 int err = -ENOENT;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002011 struct xfrm_mark m;
2012 u32 mark = xfrm_mark_get(attrs, &m);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002013
Thomas Graf35a7aa02007-08-22 14:00:40 -07002014 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002015 if (err)
2016 return err;
2017
Timo Teräsc8bf4d02010-03-31 00:17:04 +00002018 err = verify_policy_dir(p->dir);
2019 if (err)
2020 return err;
2021
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002022 if (p->index)
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002023 xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002024 else {
Thomas Graf5424f322007-08-22 14:01:33 -07002025 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Paul Moore03e1ad72008-04-12 19:07:52 -07002026 struct xfrm_sec_ctx *ctx;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002027
Thomas Graf35a7aa02007-08-22 14:00:40 -07002028 err = verify_sec_ctx_len(attrs);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002029 if (err)
2030 return err;
2031
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07002032 ctx = NULL;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002033 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07002034 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002035
Nikolay Aleksandrov52a4c642014-03-07 12:44:19 +01002036 err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL);
Paul Moore03e1ad72008-04-12 19:07:52 -07002037 if (err)
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002038 return err;
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07002039 }
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002040 xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir,
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002041 &p->sel, ctx, 0, &err);
Paul Moore03e1ad72008-04-12 19:07:52 -07002042 security_xfrm_policy_free(ctx);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002043 }
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002044 if (xp == NULL)
Eric Parisef41aaa2007-03-07 15:37:58 -08002045 return -ENOENT;
Paul Moore03e1ad72008-04-12 19:07:52 -07002046
Timo Teräsea2dea92010-03-31 00:17:05 +00002047 if (unlikely(xp->walk.dead))
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002048 goto out;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002049
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002050 err = 0;
2051 if (up->hard) {
2052 xfrm_policy_delete(xp, p->dir);
Tetsuo Handa2e710292014-04-22 21:48:30 +09002053 xfrm_audit_policy_delete(xp, 1, true);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002054 } else {
2055 // reset the timers here?
Jakub Wilk0c199a92015-07-18 14:41:51 +02002056 WARN(1, "Don't know what to do with soft policy expire\n");
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002057 }
Eric W. Biedermanc6bb8132012-09-07 21:17:17 +00002058 km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002059
2060out:
2061 xfrm_pol_put(xp);
2062 return err;
2063}
2064
Christoph Hellwig22e70052007-01-02 15:22:30 -08002065static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07002066 struct nlattr **attrs)
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002067{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002068 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002069 struct xfrm_state *x;
2070 int err;
Thomas Graf7b67c852007-08-22 13:53:52 -07002071 struct xfrm_user_expire *ue = nlmsg_data(nlh);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002072 struct xfrm_usersa_info *p = &ue->state;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002073 struct xfrm_mark m;
Nicolas Dichtel928497f2010-08-31 05:54:00 +00002074 u32 mark = xfrm_mark_get(attrs, &m);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002075
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002076 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 -08002077
David S. Miller3a765aa2007-02-26 14:52:21 -08002078 err = -ENOENT;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002079 if (x == NULL)
2080 return err;
2081
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002082 spin_lock_bh(&x->lock);
David S. Miller3a765aa2007-02-26 14:52:21 -08002083 err = -EINVAL;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002084 if (x->km.state != XFRM_STATE_VALID)
2085 goto out;
Eric W. Biedermanc6bb8132012-09-07 21:17:17 +00002086 km_state_expired(x, ue->hard, nlh->nlmsg_pid);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002087
Joy Latten161a09e2006-11-27 13:11:54 -06002088 if (ue->hard) {
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002089 __xfrm_state_delete(x);
Tetsuo Handa2e710292014-04-22 21:48:30 +09002090 xfrm_audit_state_delete(x, 1, true);
Joy Latten161a09e2006-11-27 13:11:54 -06002091 }
David S. Miller3a765aa2007-02-26 14:52:21 -08002092 err = 0;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002093out:
2094 spin_unlock_bh(&x->lock);
2095 xfrm_state_put(x);
2096 return err;
2097}
2098
Christoph Hellwig22e70052007-01-02 15:22:30 -08002099static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07002100 struct nlattr **attrs)
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002101{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002102 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002103 struct xfrm_policy *xp;
2104 struct xfrm_user_tmpl *ut;
2105 int i;
Thomas Graf5424f322007-08-22 14:01:33 -07002106 struct nlattr *rt = attrs[XFRMA_TMPL];
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002107 struct xfrm_mark mark;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002108
Thomas Graf7b67c852007-08-22 13:53:52 -07002109 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002110 struct xfrm_state *x = xfrm_state_alloc(net);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002111 int err = -ENOMEM;
2112
2113 if (!x)
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002114 goto nomem;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002115
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002116 xfrm_mark_get(attrs, &mark);
2117
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002118 err = verify_newpolicy_info(&ua->policy);
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002119 if (err)
2120 goto bad_policy;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002121
2122 /* build an XP */
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002123 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002124 if (!xp)
2125 goto free_state;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002126
2127 memcpy(&x->id, &ua->id, sizeof(ua->id));
2128 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
2129 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002130 xp->mark.m = x->mark.m = mark.m;
2131 xp->mark.v = x->mark.v = mark.v;
Thomas Graf5424f322007-08-22 14:01:33 -07002132 ut = nla_data(rt);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002133 /* extract the templates and for each call km_key */
2134 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
2135 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
2136 memcpy(&x->id, &t->id, sizeof(x->id));
2137 x->props.mode = t->mode;
2138 x->props.reqid = t->reqid;
2139 x->props.family = ut->family;
2140 t->aalgos = ua->aalgos;
2141 t->ealgos = ua->ealgos;
2142 t->calgos = ua->calgos;
2143 err = km_query(x, t, xp);
2144
2145 }
2146
2147 kfree(x);
2148 kfree(xp);
2149
2150 return 0;
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002151
2152bad_policy:
stephen hemminger62db5cf2010-05-12 06:37:06 +00002153 WARN(1, "BAD policy passed\n");
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08002154free_state:
2155 kfree(x);
2156nomem:
2157 return err;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002158}
2159
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002160#ifdef CONFIG_XFRM_MIGRATE
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002161static int copy_from_user_migrate(struct xfrm_migrate *ma,
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002162 struct xfrm_kmaddress *k,
Thomas Graf5424f322007-08-22 14:01:33 -07002163 struct nlattr **attrs, int *num)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002164{
Thomas Graf5424f322007-08-22 14:01:33 -07002165 struct nlattr *rt = attrs[XFRMA_MIGRATE];
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002166 struct xfrm_user_migrate *um;
2167 int i, num_migrate;
2168
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002169 if (k != NULL) {
2170 struct xfrm_user_kmaddress *uk;
2171
2172 uk = nla_data(attrs[XFRMA_KMADDRESS]);
2173 memcpy(&k->local, &uk->local, sizeof(k->local));
2174 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
2175 k->family = uk->family;
2176 k->reserved = uk->reserved;
2177 }
2178
Thomas Graf5424f322007-08-22 14:01:33 -07002179 um = nla_data(rt);
2180 num_migrate = nla_len(rt) / sizeof(*um);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002181
2182 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
2183 return -EINVAL;
2184
2185 for (i = 0; i < num_migrate; i++, um++, ma++) {
2186 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
2187 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
2188 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
2189 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
2190
2191 ma->proto = um->proto;
2192 ma->mode = um->mode;
2193 ma->reqid = um->reqid;
2194
2195 ma->old_family = um->old_family;
2196 ma->new_family = um->new_family;
2197 }
2198
2199 *num = i;
2200 return 0;
2201}
2202
2203static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07002204 struct nlattr **attrs)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002205{
Thomas Graf7b67c852007-08-22 13:53:52 -07002206 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002207 struct xfrm_migrate m[XFRM_MAX_DEPTH];
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002208 struct xfrm_kmaddress km, *kmp;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002209 u8 type;
2210 int err;
2211 int n = 0;
Fan Du8d549c42013-11-07 17:47:49 +08002212 struct net *net = sock_net(skb->sk);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002213
Thomas Graf35a7aa02007-08-22 14:00:40 -07002214 if (attrs[XFRMA_MIGRATE] == NULL)
Thomas Grafcf5cb792007-08-22 13:59:04 -07002215 return -EINVAL;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002216
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002217 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
2218
Thomas Graf5424f322007-08-22 14:01:33 -07002219 err = copy_from_user_policy_type(&type, attrs);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002220 if (err)
2221 return err;
2222
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002223 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002224 if (err)
2225 return err;
2226
2227 if (!n)
2228 return 0;
2229
Fan Du8d549c42013-11-07 17:47:49 +08002230 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002231
2232 return 0;
2233}
2234#else
2235static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07002236 struct nlattr **attrs)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002237{
2238 return -ENOPROTOOPT;
2239}
2240#endif
2241
2242#ifdef CONFIG_XFRM_MIGRATE
David S. Miller183cad12011-02-24 00:28:01 -05002243static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002244{
2245 struct xfrm_user_migrate um;
2246
2247 memset(&um, 0, sizeof(um));
2248 um.proto = m->proto;
2249 um.mode = m->mode;
2250 um.reqid = m->reqid;
2251 um.old_family = m->old_family;
2252 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
2253 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
2254 um.new_family = m->new_family;
2255 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
2256 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
2257
Thomas Grafc0144be2007-08-22 13:55:43 -07002258 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002259}
2260
David S. Miller183cad12011-02-24 00:28:01 -05002261static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb)
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002262{
2263 struct xfrm_user_kmaddress uk;
2264
2265 memset(&uk, 0, sizeof(uk));
2266 uk.family = k->family;
2267 uk.reserved = k->reserved;
2268 memcpy(&uk.local, &k->local, sizeof(uk.local));
Arnaud Ebalarda1caa322008-11-03 01:30:23 -08002269 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002270
2271 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
2272}
2273
2274static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
Thomas Graf7deb2262007-08-22 13:57:39 -07002275{
2276 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002277 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
2278 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
2279 + userpolicy_type_attrsize();
Thomas Graf7deb2262007-08-22 13:57:39 -07002280}
2281
David S. Miller183cad12011-02-24 00:28:01 -05002282static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m,
2283 int num_migrate, const struct xfrm_kmaddress *k,
2284 const struct xfrm_selector *sel, u8 dir, u8 type)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002285{
David S. Miller183cad12011-02-24 00:28:01 -05002286 const struct xfrm_migrate *mp;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002287 struct xfrm_userpolicy_id *pol_id;
2288 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002289 int i, err;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002290
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002291 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
2292 if (nlh == NULL)
2293 return -EMSGSIZE;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002294
Thomas Graf7b67c852007-08-22 13:53:52 -07002295 pol_id = nlmsg_data(nlh);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002296 /* copy data from selector, dir, and type to the pol_id */
2297 memset(pol_id, 0, sizeof(*pol_id));
2298 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
2299 pol_id->dir = dir;
2300
David S. Miller1d1e34d2012-06-27 21:57:03 -07002301 if (k != NULL) {
2302 err = copy_to_user_kmaddress(k, skb);
2303 if (err)
2304 goto out_cancel;
2305 }
2306 err = copy_to_user_policy_type(type, skb);
2307 if (err)
2308 goto out_cancel;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002309 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
David S. Miller1d1e34d2012-06-27 21:57:03 -07002310 err = copy_to_user_migrate(mp, skb);
2311 if (err)
2312 goto out_cancel;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002313 }
2314
Johannes Berg053c0952015-01-16 22:09:00 +01002315 nlmsg_end(skb, nlh);
2316 return 0;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002317
2318out_cancel:
Thomas Graf98250692007-08-22 12:47:26 -07002319 nlmsg_cancel(skb, nlh);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002320 return err;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002321}
2322
David S. Miller183cad12011-02-24 00:28:01 -05002323static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2324 const struct xfrm_migrate *m, int num_migrate,
2325 const struct xfrm_kmaddress *k)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002326{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002327 struct net *net = &init_net;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002328 struct sk_buff *skb;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002329
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002330 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002331 if (skb == NULL)
2332 return -ENOMEM;
2333
2334 /* build migrate */
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002335 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002336 BUG();
2337
Michal Kubecek21ee5432014-06-03 10:26:06 +02002338 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002339}
2340#else
David S. Miller183cad12011-02-24 00:28:01 -05002341static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
2342 const struct xfrm_migrate *m, int num_migrate,
2343 const struct xfrm_kmaddress *k)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002344{
2345 return -ENOPROTOOPT;
2346}
2347#endif
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002348
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002349#define XMSGSIZE(type) sizeof(struct type)
Thomas Graf492b5582005-05-03 14:26:40 -07002350
2351static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
David S. Miller66f9a252009-01-20 09:49:51 -08002352 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
Thomas Graf492b5582005-05-03 14:26:40 -07002353 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2354 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2355 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2356 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2357 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2358 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002359 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002360 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
Thomas Graf492b5582005-05-03 14:26:40 -07002361 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
David S. Miller66f9a252009-01-20 09:49:51 -08002362 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002363 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
Thomas Graf492b5582005-05-03 14:26:40 -07002364 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002365 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002366 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2367 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002368 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002369 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002370 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
Christophe Gouault880a6fa2014-08-29 16:16:05 +02002371 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002372 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002373};
2374
Thomas Graf492b5582005-05-03 14:26:40 -07002375#undef XMSGSIZE
2376
Thomas Grafcf5cb792007-08-22 13:59:04 -07002377static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
jamalc28e9302010-02-09 03:59:38 +00002378 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2379 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2380 [XFRMA_LASTUSED] = { .type = NLA_U64},
2381 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
Herbert Xu1a6509d2008-01-28 19:37:29 -08002382 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
Thomas Grafcf5cb792007-08-22 13:59:04 -07002383 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2384 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2385 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2386 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2387 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2388 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2389 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2390 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2391 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2392 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2393 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2394 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2395 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2396 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002397 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002398 [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) },
Martin Willi35d28562010-12-08 04:37:49 +00002399 [XFRMA_TFCPAD] = { .type = NLA_U32 },
Steffen Klassertd8647b72011-03-08 00:10:27 +00002400 [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) },
Nicolas Dichtela947b0a2013-02-22 10:54:54 +01002401 [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 },
Nicolas Dichteld3623092014-02-14 15:30:36 +01002402 [XFRMA_PROTO] = { .type = NLA_U8 },
Nicolas Dichtel870a2df2014-03-06 18:24:29 +01002403 [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) },
Thomas Grafcf5cb792007-08-22 13:59:04 -07002404};
2405
Christophe Gouault880a6fa2014-08-29 16:16:05 +02002406static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
2407 [XFRMA_SPD_IPV4_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2408 [XFRMA_SPD_IPV6_HTHRESH] = { .len = sizeof(struct xfrmu_spdhthresh) },
2409};
2410
Mathias Krause05600a72013-02-24 14:10:27 +01002411static const struct xfrm_link {
Thomas Graf5424f322007-08-22 14:01:33 -07002412 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002413 int (*dump)(struct sk_buff *, struct netlink_callback *);
Timo Teras4c563f72008-02-28 21:31:08 -08002414 int (*done)(struct netlink_callback *);
Christophe Gouault880a6fa2014-08-29 16:16:05 +02002415 const struct nla_policy *nla_pol;
2416 int nla_max;
Thomas Graf492b5582005-05-03 14:26:40 -07002417} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2418 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2419 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2420 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
Timo Teras4c563f72008-02-28 21:31:08 -08002421 .dump = xfrm_dump_sa,
2422 .done = xfrm_dump_sa_done },
Thomas Graf492b5582005-05-03 14:26:40 -07002423 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2424 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2425 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
Timo Teras4c563f72008-02-28 21:31:08 -08002426 .dump = xfrm_dump_policy,
2427 .done = xfrm_dump_policy_done },
Thomas Graf492b5582005-05-03 14:26:40 -07002428 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002429 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002430 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
Thomas Graf492b5582005-05-03 14:26:40 -07002431 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2432 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002433 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
Thomas Graf492b5582005-05-03 14:26:40 -07002434 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2435 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002436 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2437 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002438 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
Jamal Hadi Salim566ec032007-04-26 14:12:15 -07002439 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
Christophe Gouault880a6fa2014-08-29 16:16:05 +02002440 [XFRM_MSG_NEWSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_set_spdinfo,
2441 .nla_pol = xfrma_spd_policy,
2442 .nla_max = XFRMA_SPD_MAX },
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07002443 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
Linus Torvalds1da177e2005-04-16 15:20:36 -07002444};
2445
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002446static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002448 struct net *net = sock_net(skb->sk);
Thomas Graf35a7aa02007-08-22 14:00:40 -07002449 struct nlattr *attrs[XFRMA_MAX+1];
Mathias Krause05600a72013-02-24 14:10:27 +01002450 const struct xfrm_link *link;
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002451 int type, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002452
Fan Du74005992015-01-27 17:00:29 +08002453#ifdef CONFIG_COMPAT
Andy Lutomirski2bf8c472016-03-22 14:25:10 -07002454 if (in_compat_syscall())
Fan Du74005992015-01-27 17:00:29 +08002455 return -ENOTSUPP;
2456#endif
2457
Linus Torvalds1da177e2005-04-16 15:20:36 -07002458 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002459 if (type > XFRM_MSG_MAX)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002460 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461
2462 type -= XFRM_MSG_BASE;
2463 link = &xfrm_dispatch[type];
2464
2465 /* All operations require privileges, even GET */
Eric W. Biederman90f62cf2014-04-23 14:29:27 -07002466 if (!netlink_net_capable(skb, CAP_NET_ADMIN))
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002467 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002468
Thomas Graf492b5582005-05-03 14:26:40 -07002469 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2470 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
David S. Millerb8f3ab42011-01-18 12:40:38 -08002471 (nlh->nlmsg_flags & NLM_F_DUMP)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472 if (link->dump == NULL)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002473 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002474
Pablo Neira Ayuso80d326f2012-02-24 14:30:15 +00002475 {
2476 struct netlink_dump_control c = {
2477 .dump = link->dump,
2478 .done = link->done,
2479 };
2480 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c);
2481 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002482 }
2483
Christophe Gouault880a6fa2014-08-29 16:16:05 +02002484 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs,
2485 link->nla_max ? : XFRMA_MAX,
2486 link->nla_pol ? : xfrma_policy);
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002487 if (err < 0)
2488 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002489
2490 if (link->doit == NULL)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002491 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002492
Thomas Graf5424f322007-08-22 14:01:33 -07002493 return link->doit(skb, nlh, attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494}
2495
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002496static void xfrm_netlink_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002497{
Fan Du283bc9f2013-11-07 17:47:50 +08002498 struct net *net = sock_net(skb->sk);
2499
2500 mutex_lock(&net->xfrm.xfrm_cfg_mutex);
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002501 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
Fan Du283bc9f2013-11-07 17:47:50 +08002502 mutex_unlock(&net->xfrm.xfrm_cfg_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002503}
2504
Thomas Graf7deb2262007-08-22 13:57:39 -07002505static inline size_t xfrm_expire_msgsize(void)
2506{
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002507 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire))
2508 + nla_total_size(sizeof(struct xfrm_mark));
Thomas Graf7deb2262007-08-22 13:57:39 -07002509}
2510
David S. Miller214e0052011-02-24 00:02:38 -05002511static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002512{
2513 struct xfrm_user_expire *ue;
2514 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002515 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002516
Eric W. Biederman15e47302012-09-07 20:12:54 +00002517 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002518 if (nlh == NULL)
2519 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002520
Thomas Graf7b67c852007-08-22 13:53:52 -07002521 ue = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002522 copy_to_user_state(x, &ue->state);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002523 ue->hard = (c->data.hard != 0) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002524
David S. Miller1d1e34d2012-06-27 21:57:03 -07002525 err = xfrm_mark_put(skb, &x->mark);
2526 if (err)
2527 return err;
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002528
Johannes Berg053c0952015-01-16 22:09:00 +01002529 nlmsg_end(skb, nlh);
2530 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002531}
2532
David S. Miller214e0052011-02-24 00:02:38 -05002533static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002534{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002535 struct net *net = xs_net(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002536 struct sk_buff *skb;
2537
Thomas Graf7deb2262007-08-22 13:57:39 -07002538 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002539 if (skb == NULL)
2540 return -ENOMEM;
2541
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002542 if (build_expire(skb, x, c) < 0) {
2543 kfree_skb(skb);
2544 return -EMSGSIZE;
2545 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002546
Michal Kubecek21ee5432014-06-03 10:26:06 +02002547 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002548}
2549
David S. Miller214e0052011-02-24 00:02:38 -05002550static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002551{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002552 struct net *net = xs_net(x);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002553 struct sk_buff *skb;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002554
Steffen Klassertd8647b72011-03-08 00:10:27 +00002555 skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002556 if (skb == NULL)
2557 return -ENOMEM;
2558
2559 if (build_aevent(skb, x, c) < 0)
2560 BUG();
2561
Michal Kubecek21ee5432014-06-03 10:26:06 +02002562 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002563}
2564
David S. Miller214e0052011-02-24 00:02:38 -05002565static int xfrm_notify_sa_flush(const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002566{
Alexey Dobriyan70678022008-11-25 17:50:36 -08002567 struct net *net = c->net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002568 struct xfrm_usersa_flush *p;
2569 struct nlmsghdr *nlh;
2570 struct sk_buff *skb;
Thomas Graf7deb2262007-08-22 13:57:39 -07002571 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002572
Thomas Graf7deb2262007-08-22 13:57:39 -07002573 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002574 if (skb == NULL)
2575 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002576
Eric W. Biederman15e47302012-09-07 20:12:54 +00002577 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002578 if (nlh == NULL) {
2579 kfree_skb(skb);
2580 return -EMSGSIZE;
2581 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002582
Thomas Graf7b67c852007-08-22 13:53:52 -07002583 p = nlmsg_data(nlh);
Herbert Xubf088672005-06-18 22:44:00 -07002584 p->proto = c->data.proto;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002585
Thomas Graf98250692007-08-22 12:47:26 -07002586 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002587
Michal Kubecek21ee5432014-06-03 10:26:06 +02002588 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002589}
2590
Thomas Graf7deb2262007-08-22 13:57:39 -07002591static inline size_t xfrm_sa_len(struct xfrm_state *x)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002592{
Thomas Graf7deb2262007-08-22 13:57:39 -07002593 size_t l = 0;
Herbert Xu1a6509d2008-01-28 19:37:29 -08002594 if (x->aead)
2595 l += nla_total_size(aead_len(x->aead));
Martin Willi4447bb32009-11-25 00:29:52 +00002596 if (x->aalg) {
2597 l += nla_total_size(sizeof(struct xfrm_algo) +
2598 (x->aalg->alg_key_len + 7) / 8);
2599 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2600 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002601 if (x->ealg)
Eric Dumazet0f99be02008-01-08 23:39:06 -08002602 l += nla_total_size(xfrm_alg_len(x->ealg));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002603 if (x->calg)
Thomas Graf7deb2262007-08-22 13:57:39 -07002604 l += nla_total_size(sizeof(*x->calg));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002605 if (x->encap)
Thomas Graf7deb2262007-08-22 13:57:39 -07002606 l += nla_total_size(sizeof(*x->encap));
Martin Willi35d28562010-12-08 04:37:49 +00002607 if (x->tfcpad)
2608 l += nla_total_size(sizeof(x->tfcpad));
Steffen Klassertd8647b72011-03-08 00:10:27 +00002609 if (x->replay_esn)
2610 l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn));
dingzhif293a5e2014-10-30 09:39:36 +01002611 else
2612 l += nla_total_size(sizeof(struct xfrm_replay_state));
Herbert Xu68325d32007-10-09 13:30:57 -07002613 if (x->security)
2614 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2615 x->security->ctx_len);
2616 if (x->coaddr)
2617 l += nla_total_size(sizeof(*x->coaddr));
Nicolas Dichtela947b0a2013-02-22 10:54:54 +01002618 if (x->props.extra_flags)
2619 l += nla_total_size(sizeof(x->props.extra_flags));
Herbert Xu68325d32007-10-09 13:30:57 -07002620
Herbert Xud26f3982007-11-13 21:47:08 -08002621 /* Must count x->lastused as it may become non-zero behind our back. */
Nicolas Dichtelde95c4a2016-04-22 17:31:23 +02002622 l += nla_total_size_64bit(sizeof(u64));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002623
2624 return l;
2625}
2626
David S. Miller214e0052011-02-24 00:02:38 -05002627static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002628{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002629 struct net *net = xs_net(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002630 struct xfrm_usersa_info *p;
Herbert Xu0603eac2005-06-18 22:54:36 -07002631 struct xfrm_usersa_id *id;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002632 struct nlmsghdr *nlh;
2633 struct sk_buff *skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002634 int len = xfrm_sa_len(x);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002635 int headlen, err;
Herbert Xu0603eac2005-06-18 22:54:36 -07002636
2637 headlen = sizeof(*p);
2638 if (c->event == XFRM_MSG_DELSA) {
Thomas Graf7deb2262007-08-22 13:57:39 -07002639 len += nla_total_size(headlen);
Herbert Xu0603eac2005-06-18 22:54:36 -07002640 headlen = sizeof(*id);
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002641 len += nla_total_size(sizeof(struct xfrm_mark));
Herbert Xu0603eac2005-06-18 22:54:36 -07002642 }
Thomas Graf7deb2262007-08-22 13:57:39 -07002643 len += NLMSG_ALIGN(headlen);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002644
Thomas Graf7deb2262007-08-22 13:57:39 -07002645 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002646 if (skb == NULL)
2647 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002648
Eric W. Biederman15e47302012-09-07 20:12:54 +00002649 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002650 err = -EMSGSIZE;
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002651 if (nlh == NULL)
David S. Miller1d1e34d2012-06-27 21:57:03 -07002652 goto out_free_skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002653
Thomas Graf7b67c852007-08-22 13:53:52 -07002654 p = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002655 if (c->event == XFRM_MSG_DELSA) {
Thomas Grafc0144be2007-08-22 13:55:43 -07002656 struct nlattr *attr;
2657
Thomas Graf7b67c852007-08-22 13:53:52 -07002658 id = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002659 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2660 id->spi = x->id.spi;
2661 id->family = x->props.family;
2662 id->proto = x->id.proto;
2663
Thomas Grafc0144be2007-08-22 13:55:43 -07002664 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
David S. Miller1d1e34d2012-06-27 21:57:03 -07002665 err = -EMSGSIZE;
Thomas Grafc0144be2007-08-22 13:55:43 -07002666 if (attr == NULL)
David S. Miller1d1e34d2012-06-27 21:57:03 -07002667 goto out_free_skb;
Thomas Grafc0144be2007-08-22 13:55:43 -07002668
2669 p = nla_data(attr);
Herbert Xu0603eac2005-06-18 22:54:36 -07002670 }
David S. Miller1d1e34d2012-06-27 21:57:03 -07002671 err = copy_to_user_state_extra(x, p, skb);
2672 if (err)
2673 goto out_free_skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002674
Thomas Graf98250692007-08-22 12:47:26 -07002675 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002676
Michal Kubecek21ee5432014-06-03 10:26:06 +02002677 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002678
David S. Miller1d1e34d2012-06-27 21:57:03 -07002679out_free_skb:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002680 kfree_skb(skb);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002681 return err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002682}
2683
David S. Miller214e0052011-02-24 00:02:38 -05002684static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002685{
2686
2687 switch (c->event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07002688 case XFRM_MSG_EXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002689 return xfrm_exp_state_notify(x, c);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002690 case XFRM_MSG_NEWAE:
2691 return xfrm_aevent_state_notify(x, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002692 case XFRM_MSG_DELSA:
2693 case XFRM_MSG_UPDSA:
2694 case XFRM_MSG_NEWSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002695 return xfrm_notify_sa(x, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002696 case XFRM_MSG_FLUSHSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002697 return xfrm_notify_sa_flush(c);
2698 default:
stephen hemminger62db5cf2010-05-12 06:37:06 +00002699 printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n",
2700 c->event);
2701 break;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002702 }
2703
2704 return 0;
2705
2706}
2707
Thomas Graf7deb2262007-08-22 13:57:39 -07002708static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2709 struct xfrm_policy *xp)
2710{
2711 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2712 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
Jamal Hadi Salim6f26b612010-02-22 11:32:59 +00002713 + nla_total_size(sizeof(struct xfrm_mark))
Thomas Graf7deb2262007-08-22 13:57:39 -07002714 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2715 + userpolicy_type_attrsize();
2716}
2717
Linus Torvalds1da177e2005-04-16 15:20:36 -07002718static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
Fan Du65e07362012-08-15 10:13:47 +08002719 struct xfrm_tmpl *xt, struct xfrm_policy *xp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720{
David S. Miller1d1e34d2012-06-27 21:57:03 -07002721 __u32 seq = xfrm_get_acqseq();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002722 struct xfrm_user_acquire *ua;
2723 struct nlmsghdr *nlh;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002724 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002725
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002726 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2727 if (nlh == NULL)
2728 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002729
Thomas Graf7b67c852007-08-22 13:53:52 -07002730 ua = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002731 memcpy(&ua->id, &x->id, sizeof(ua->id));
2732 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2733 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
Fan Du65e07362012-08-15 10:13:47 +08002734 copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002735 ua->aalgos = xt->aalgos;
2736 ua->ealgos = xt->ealgos;
2737 ua->calgos = xt->calgos;
2738 ua->seq = x->km.seq = seq;
2739
David S. Miller1d1e34d2012-06-27 21:57:03 -07002740 err = copy_to_user_tmpl(xp, skb);
2741 if (!err)
2742 err = copy_to_user_state_sec_ctx(x, skb);
2743 if (!err)
2744 err = copy_to_user_policy_type(xp->type, skb);
2745 if (!err)
2746 err = xfrm_mark_put(skb, &xp->mark);
2747 if (err) {
2748 nlmsg_cancel(skb, nlh);
2749 return err;
2750 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002751
Johannes Berg053c0952015-01-16 22:09:00 +01002752 nlmsg_end(skb, nlh);
2753 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754}
2755
2756static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
Fan Du65e07362012-08-15 10:13:47 +08002757 struct xfrm_policy *xp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002758{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002759 struct net *net = xs_net(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002760 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002761
Thomas Graf7deb2262007-08-22 13:57:39 -07002762 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002763 if (skb == NULL)
2764 return -ENOMEM;
2765
Fan Du65e07362012-08-15 10:13:47 +08002766 if (build_acquire(skb, x, xt, xp) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002767 BUG();
2768
Michal Kubecek21ee5432014-06-03 10:26:06 +02002769 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002770}
2771
2772/* User gives us xfrm_user_policy_info followed by an array of 0
2773 * or more templates.
2774 */
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07002775static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002776 u8 *data, int len, int *dir)
2777{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002778 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002779 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2780 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2781 struct xfrm_policy *xp;
2782 int nr;
2783
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07002784 switch (sk->sk_family) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002785 case AF_INET:
2786 if (opt != IP_XFRM_POLICY) {
2787 *dir = -EOPNOTSUPP;
2788 return NULL;
2789 }
2790 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00002791#if IS_ENABLED(CONFIG_IPV6)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002792 case AF_INET6:
2793 if (opt != IPV6_XFRM_POLICY) {
2794 *dir = -EOPNOTSUPP;
2795 return NULL;
2796 }
2797 break;
2798#endif
2799 default:
2800 *dir = -EINVAL;
2801 return NULL;
2802 }
2803
2804 *dir = -EINVAL;
2805
2806 if (len < sizeof(*p) ||
2807 verify_newpolicy_info(p))
2808 return NULL;
2809
2810 nr = ((len - sizeof(*p)) / sizeof(*ut));
David S. Millerb4ad86bf2006-12-03 19:19:26 -08002811 if (validate_tmpl(nr, ut, p->sel.family))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002812 return NULL;
2813
Herbert Xua4f1bac2005-07-26 15:43:17 -07002814 if (p->dir > XFRM_POLICY_OUT)
2815 return NULL;
2816
Herbert Xu2f09a4d2010-08-14 22:38:09 -07002817 xp = xfrm_policy_alloc(net, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002818 if (xp == NULL) {
2819 *dir = -ENOBUFS;
2820 return NULL;
2821 }
2822
2823 copy_from_user_policy(xp, p);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002824 xp->type = XFRM_POLICY_TYPE_MAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002825 copy_templates(xp, ut, nr);
2826
2827 *dir = p->dir;
2828
2829 return xp;
2830}
2831
Thomas Graf7deb2262007-08-22 13:57:39 -07002832static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2833{
2834 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2835 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2836 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002837 + nla_total_size(sizeof(struct xfrm_mark))
Thomas Graf7deb2262007-08-22 13:57:39 -07002838 + userpolicy_type_attrsize();
2839}
2840
Linus Torvalds1da177e2005-04-16 15:20:36 -07002841static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
David S. Miller214e0052011-02-24 00:02:38 -05002842 int dir, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002843{
2844 struct xfrm_user_polexpire *upe;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002845 int hard = c->data.hard;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002846 struct nlmsghdr *nlh;
2847 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002848
Eric W. Biederman15e47302012-09-07 20:12:54 +00002849 nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002850 if (nlh == NULL)
2851 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002852
Thomas Graf7b67c852007-08-22 13:53:52 -07002853 upe = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002854 copy_to_user_policy(xp, &upe->pol, dir);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002855 err = copy_to_user_tmpl(xp, skb);
2856 if (!err)
2857 err = copy_to_user_sec_ctx(xp, skb);
2858 if (!err)
2859 err = copy_to_user_policy_type(xp->type, skb);
2860 if (!err)
2861 err = xfrm_mark_put(skb, &xp->mark);
2862 if (err) {
2863 nlmsg_cancel(skb, nlh);
2864 return err;
2865 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002866 upe->hard = !!hard;
2867
Johannes Berg053c0952015-01-16 22:09:00 +01002868 nlmsg_end(skb, nlh);
2869 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002870}
2871
David S. Miller214e0052011-02-24 00:02:38 -05002872static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002873{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002874 struct net *net = xp_net(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002875 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002876
Thomas Graf7deb2262007-08-22 13:57:39 -07002877 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002878 if (skb == NULL)
2879 return -ENOMEM;
2880
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002881 if (build_polexpire(skb, xp, dir, c) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002882 BUG();
2883
Michal Kubecek21ee5432014-06-03 10:26:06 +02002884 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002885}
2886
David S. Miller214e0052011-02-24 00:02:38 -05002887static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002888{
David S. Miller1d1e34d2012-06-27 21:57:03 -07002889 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002890 struct net *net = xp_net(xp);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002891 struct xfrm_userpolicy_info *p;
Herbert Xu0603eac2005-06-18 22:54:36 -07002892 struct xfrm_userpolicy_id *id;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002893 struct nlmsghdr *nlh;
2894 struct sk_buff *skb;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002895 int headlen, err;
Herbert Xu0603eac2005-06-18 22:54:36 -07002896
2897 headlen = sizeof(*p);
2898 if (c->event == XFRM_MSG_DELPOLICY) {
Thomas Graf7deb2262007-08-22 13:57:39 -07002899 len += nla_total_size(headlen);
Herbert Xu0603eac2005-06-18 22:54:36 -07002900 headlen = sizeof(*id);
2901 }
Thomas Grafcfbfd452007-08-22 13:57:04 -07002902 len += userpolicy_type_attrsize();
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002903 len += nla_total_size(sizeof(struct xfrm_mark));
Thomas Graf7deb2262007-08-22 13:57:39 -07002904 len += NLMSG_ALIGN(headlen);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002905
Thomas Graf7deb2262007-08-22 13:57:39 -07002906 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002907 if (skb == NULL)
2908 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002909
Eric W. Biederman15e47302012-09-07 20:12:54 +00002910 nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002911 err = -EMSGSIZE;
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002912 if (nlh == NULL)
David S. Miller1d1e34d2012-06-27 21:57:03 -07002913 goto out_free_skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002914
Thomas Graf7b67c852007-08-22 13:53:52 -07002915 p = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002916 if (c->event == XFRM_MSG_DELPOLICY) {
Thomas Grafc0144be2007-08-22 13:55:43 -07002917 struct nlattr *attr;
2918
Thomas Graf7b67c852007-08-22 13:53:52 -07002919 id = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002920 memset(id, 0, sizeof(*id));
2921 id->dir = dir;
2922 if (c->data.byid)
2923 id->index = xp->index;
2924 else
2925 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2926
Thomas Grafc0144be2007-08-22 13:55:43 -07002927 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
David S. Miller1d1e34d2012-06-27 21:57:03 -07002928 err = -EMSGSIZE;
Thomas Grafc0144be2007-08-22 13:55:43 -07002929 if (attr == NULL)
David S. Miller1d1e34d2012-06-27 21:57:03 -07002930 goto out_free_skb;
Thomas Grafc0144be2007-08-22 13:55:43 -07002931
2932 p = nla_data(attr);
Herbert Xu0603eac2005-06-18 22:54:36 -07002933 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002934
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002935 copy_to_user_policy(xp, p, dir);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002936 err = copy_to_user_tmpl(xp, skb);
2937 if (!err)
2938 err = copy_to_user_policy_type(xp->type, skb);
2939 if (!err)
2940 err = xfrm_mark_put(skb, &xp->mark);
2941 if (err)
2942 goto out_free_skb;
Jamal Hadi Salim295fae52010-02-22 11:33:00 +00002943
Thomas Graf98250692007-08-22 12:47:26 -07002944 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002945
Michal Kubecek21ee5432014-06-03 10:26:06 +02002946 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002947
David S. Miller1d1e34d2012-06-27 21:57:03 -07002948out_free_skb:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002949 kfree_skb(skb);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002950 return err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002951}
2952
David S. Miller214e0052011-02-24 00:02:38 -05002953static int xfrm_notify_policy_flush(const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002954{
Alexey Dobriyan70678022008-11-25 17:50:36 -08002955 struct net *net = c->net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002956 struct nlmsghdr *nlh;
2957 struct sk_buff *skb;
David S. Miller1d1e34d2012-06-27 21:57:03 -07002958 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002959
Thomas Graf7deb2262007-08-22 13:57:39 -07002960 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002961 if (skb == NULL)
2962 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002963
Eric W. Biederman15e47302012-09-07 20:12:54 +00002964 nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002965 err = -EMSGSIZE;
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002966 if (nlh == NULL)
David S. Miller1d1e34d2012-06-27 21:57:03 -07002967 goto out_free_skb;
2968 err = copy_to_user_policy_type(c->data.type, skb);
2969 if (err)
2970 goto out_free_skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002971
Thomas Graf98250692007-08-22 12:47:26 -07002972 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002973
Michal Kubecek21ee5432014-06-03 10:26:06 +02002974 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002975
David S. Miller1d1e34d2012-06-27 21:57:03 -07002976out_free_skb:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002977 kfree_skb(skb);
David S. Miller1d1e34d2012-06-27 21:57:03 -07002978 return err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002979}
2980
David S. Miller214e0052011-02-24 00:02:38 -05002981static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002982{
2983
2984 switch (c->event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07002985 case XFRM_MSG_NEWPOLICY:
2986 case XFRM_MSG_UPDPOLICY:
2987 case XFRM_MSG_DELPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002988 return xfrm_notify_policy(xp, dir, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002989 case XFRM_MSG_FLUSHPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002990 return xfrm_notify_policy_flush(c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002991 case XFRM_MSG_POLEXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002992 return xfrm_exp_policy_notify(xp, dir, c);
2993 default:
stephen hemminger62db5cf2010-05-12 06:37:06 +00002994 printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n",
2995 c->event);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002996 }
2997
2998 return 0;
2999
3000}
3001
Thomas Graf7deb2262007-08-22 13:57:39 -07003002static inline size_t xfrm_report_msgsize(void)
3003{
3004 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
3005}
3006
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07003007static int build_report(struct sk_buff *skb, u8 proto,
3008 struct xfrm_selector *sel, xfrm_address_t *addr)
3009{
3010 struct xfrm_user_report *ur;
3011 struct nlmsghdr *nlh;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07003012
Thomas Graf79b8b7f2007-08-22 12:46:53 -07003013 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
3014 if (nlh == NULL)
3015 return -EMSGSIZE;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07003016
Thomas Graf7b67c852007-08-22 13:53:52 -07003017 ur = nlmsg_data(nlh);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07003018 ur->proto = proto;
3019 memcpy(&ur->sel, sel, sizeof(ur->sel));
3020
David S. Miller1d1e34d2012-06-27 21:57:03 -07003021 if (addr) {
3022 int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr);
3023 if (err) {
3024 nlmsg_cancel(skb, nlh);
3025 return err;
3026 }
3027 }
Johannes Berg053c0952015-01-16 22:09:00 +01003028 nlmsg_end(skb, nlh);
3029 return 0;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07003030}
3031
Alexey Dobriyandb983c12008-11-25 17:51:01 -08003032static int xfrm_send_report(struct net *net, u8 proto,
3033 struct xfrm_selector *sel, xfrm_address_t *addr)
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07003034{
3035 struct sk_buff *skb;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07003036
Thomas Graf7deb2262007-08-22 13:57:39 -07003037 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07003038 if (skb == NULL)
3039 return -ENOMEM;
3040
3041 if (build_report(skb, proto, sel, addr) < 0)
3042 BUG();
3043
Michal Kubecek21ee5432014-06-03 10:26:06 +02003044 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07003045}
3046
Martin Willi3a2dfbe2008-10-28 16:01:07 -07003047static inline size_t xfrm_mapping_msgsize(void)
3048{
3049 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
3050}
3051
3052static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
3053 xfrm_address_t *new_saddr, __be16 new_sport)
3054{
3055 struct xfrm_user_mapping *um;
3056 struct nlmsghdr *nlh;
3057
3058 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
3059 if (nlh == NULL)
3060 return -EMSGSIZE;
3061
3062 um = nlmsg_data(nlh);
3063
3064 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
3065 um->id.spi = x->id.spi;
3066 um->id.family = x->props.family;
3067 um->id.proto = x->id.proto;
3068 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
3069 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
3070 um->new_sport = new_sport;
3071 um->old_sport = x->encap->encap_sport;
3072 um->reqid = x->props.reqid;
3073
Johannes Berg053c0952015-01-16 22:09:00 +01003074 nlmsg_end(skb, nlh);
3075 return 0;
Martin Willi3a2dfbe2008-10-28 16:01:07 -07003076}
3077
3078static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
3079 __be16 sport)
3080{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08003081 struct net *net = xs_net(x);
Martin Willi3a2dfbe2008-10-28 16:01:07 -07003082 struct sk_buff *skb;
3083
3084 if (x->id.proto != IPPROTO_ESP)
3085 return -EINVAL;
3086
3087 if (!x->encap)
3088 return -EINVAL;
3089
3090 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
3091 if (skb == NULL)
3092 return -ENOMEM;
3093
3094 if (build_mapping(skb, x, ipaddr, sport) < 0)
3095 BUG();
3096
Michal Kubecek21ee5432014-06-03 10:26:06 +02003097 return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING);
Martin Willi3a2dfbe2008-10-28 16:01:07 -07003098}
3099
Horia Geanta0f245582014-02-12 16:20:06 +02003100static bool xfrm_is_alive(const struct km_event *c)
3101{
3102 return (bool)xfrm_acquire_is_on(c->net);
3103}
3104
Linus Torvalds1da177e2005-04-16 15:20:36 -07003105static struct xfrm_mgr netlink_mgr = {
3106 .id = "netlink",
3107 .notify = xfrm_send_state_notify,
3108 .acquire = xfrm_send_acquire,
3109 .compile_policy = xfrm_compile_policy,
3110 .notify_policy = xfrm_send_policy_notify,
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07003111 .report = xfrm_send_report,
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08003112 .migrate = xfrm_send_migrate,
Martin Willi3a2dfbe2008-10-28 16:01:07 -07003113 .new_mapping = xfrm_send_mapping,
Horia Geanta0f245582014-02-12 16:20:06 +02003114 .is_alive = xfrm_is_alive,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003115};
3116
Alexey Dobriyana6483b72008-11-25 17:38:20 -08003117static int __net_init xfrm_user_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003118{
Patrick McHardybe336902006-03-20 22:40:54 -08003119 struct sock *nlsk;
Pablo Neira Ayusoa31f2d12012-06-29 06:15:21 +00003120 struct netlink_kernel_cfg cfg = {
3121 .groups = XFRMNLGRP_MAX,
3122 .input = xfrm_netlink_rcv,
3123 };
Patrick McHardybe336902006-03-20 22:40:54 -08003124
Pablo Neira Ayuso9f00d972012-09-08 02:53:54 +00003125 nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg);
Patrick McHardybe336902006-03-20 22:40:54 -08003126 if (nlsk == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003127 return -ENOMEM;
Eric W. Biedermand79d7922009-12-03 02:29:05 +00003128 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
Eric Dumazetcf778b02012-01-12 04:41:32 +00003129 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003130 return 0;
3131}
3132
Eric W. Biedermand79d7922009-12-03 02:29:05 +00003133static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
Alexey Dobriyana6483b72008-11-25 17:38:20 -08003134{
Eric W. Biedermand79d7922009-12-03 02:29:05 +00003135 struct net *net;
3136 list_for_each_entry(net, net_exit_list, exit_list)
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00003137 RCU_INIT_POINTER(net->xfrm.nlsk, NULL);
Eric W. Biedermand79d7922009-12-03 02:29:05 +00003138 synchronize_net();
3139 list_for_each_entry(net, net_exit_list, exit_list)
3140 netlink_kernel_release(net->xfrm.nlsk_stash);
Alexey Dobriyana6483b72008-11-25 17:38:20 -08003141}
3142
3143static struct pernet_operations xfrm_user_net_ops = {
Eric W. Biedermand79d7922009-12-03 02:29:05 +00003144 .init = xfrm_user_net_init,
3145 .exit_batch = xfrm_user_net_exit,
Alexey Dobriyana6483b72008-11-25 17:38:20 -08003146};
3147
3148static int __init xfrm_user_init(void)
3149{
3150 int rv;
3151
3152 printk(KERN_INFO "Initializing XFRM netlink socket\n");
3153
3154 rv = register_pernet_subsys(&xfrm_user_net_ops);
3155 if (rv < 0)
3156 return rv;
3157 rv = xfrm_register_km(&netlink_mgr);
3158 if (rv < 0)
3159 unregister_pernet_subsys(&xfrm_user_net_ops);
3160 return rv;
3161}
3162
Linus Torvalds1da177e2005-04-16 15:20:36 -07003163static void __exit xfrm_user_exit(void)
3164{
3165 xfrm_unregister_km(&netlink_mgr);
Alexey Dobriyana6483b72008-11-25 17:38:20 -08003166 unregister_pernet_subsys(&xfrm_user_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003167}
3168
3169module_init(xfrm_user_init);
3170module_exit(xfrm_user_exit);
3171MODULE_LICENSE("GPL");
Harald Welte4fdb3bb2005-08-09 19:40:55 -07003172MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08003173