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Commit | Line | Data |
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1da177e4 LT |
1 | /* xfrm_user.c: User interface to configure xfrm engine. |
2 | * | |
3 | * Copyright (C) 2002 David S. Miller (davem@redhat.com) | |
4 | * | |
5 | * Changes: | |
6 | * Mitsuru KANDA @USAGI | |
7 | * Kazunori MIYAZAWA @USAGI | |
8 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> | |
9 | * IPv6 support | |
df71837d | 10 | * |
1da177e4 LT |
11 | */ |
12 | ||
9409f38a | 13 | #include <linux/crypto.h> |
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/net.h> | |
21 | #include <linux/skbuff.h> | |
1da177e4 LT |
22 | #include <linux/pfkeyv2.h> |
23 | #include <linux/ipsec.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/security.h> | |
26 | #include <net/sock.h> | |
27 | #include <net/xfrm.h> | |
88fc2c84 | 28 | #include <net/netlink.h> |
fa6dd8a2 | 29 | #include <net/ah.h> |
1da177e4 | 30 | #include <asm/uaccess.h> |
e23c7194 MN |
31 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
32 | #include <linux/in6.h> | |
33 | #endif | |
1da177e4 | 34 | |
1a6509d9 HX |
35 | static inline int aead_len(struct xfrm_algo_aead *alg) |
36 | { | |
37 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
38 | } | |
39 | ||
5424f32e | 40 | static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) |
1da177e4 | 41 | { |
5424f32e | 42 | struct nlattr *rt = attrs[type]; |
1da177e4 LT |
43 | struct xfrm_algo *algp; |
44 | ||
45 | if (!rt) | |
46 | return 0; | |
47 | ||
5424f32e | 48 | algp = nla_data(rt); |
0f99be0d | 49 | if (nla_len(rt) < xfrm_alg_len(algp)) |
31c26852 HX |
50 | return -EINVAL; |
51 | ||
1da177e4 LT |
52 | switch (type) { |
53 | case XFRMA_ALG_AUTH: | |
1da177e4 | 54 | case XFRMA_ALG_CRYPT: |
1da177e4 | 55 | case XFRMA_ALG_COMP: |
1da177e4 LT |
56 | break; |
57 | ||
58 | default: | |
59 | return -EINVAL; | |
3ff50b79 | 60 | } |
1da177e4 LT |
61 | |
62 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
63 | return 0; | |
64 | } | |
65 | ||
4447bb33 MW |
66 | static int verify_auth_trunc(struct nlattr **attrs) |
67 | { | |
68 | struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; | |
69 | struct xfrm_algo_auth *algp; | |
70 | ||
71 | if (!rt) | |
72 | return 0; | |
73 | ||
74 | algp = nla_data(rt); | |
75 | if (nla_len(rt) < xfrm_alg_auth_len(algp)) | |
76 | return -EINVAL; | |
77 | ||
78 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
79 | return 0; | |
80 | } | |
81 | ||
1a6509d9 HX |
82 | static int verify_aead(struct nlattr **attrs) |
83 | { | |
84 | struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; | |
85 | struct xfrm_algo_aead *algp; | |
86 | ||
87 | if (!rt) | |
88 | return 0; | |
89 | ||
90 | algp = nla_data(rt); | |
91 | if (nla_len(rt) < aead_len(algp)) | |
92 | return -EINVAL; | |
93 | ||
94 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
95 | return 0; | |
96 | } | |
97 | ||
5424f32e | 98 | static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, |
eb2971b6 MN |
99 | xfrm_address_t **addrp) |
100 | { | |
5424f32e | 101 | struct nlattr *rt = attrs[type]; |
eb2971b6 | 102 | |
cf5cb79f | 103 | if (rt && addrp) |
5424f32e | 104 | *addrp = nla_data(rt); |
eb2971b6 | 105 | } |
df71837d | 106 | |
5424f32e | 107 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
df71837d | 108 | { |
5424f32e | 109 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d | 110 | struct xfrm_user_sec_ctx *uctx; |
df71837d TJ |
111 | |
112 | if (!rt) | |
113 | return 0; | |
114 | ||
5424f32e | 115 | uctx = nla_data(rt); |
cf5cb79f | 116 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
df71837d TJ |
117 | return -EINVAL; |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
d8647b79 SK |
122 | static inline int verify_replay(struct xfrm_usersa_info *p, |
123 | struct nlattr **attrs) | |
124 | { | |
125 | struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; | |
126 | ||
127 | if (!rt) | |
128 | return 0; | |
129 | ||
02aadf72 SK |
130 | if (p->id.proto != IPPROTO_ESP) |
131 | return -EINVAL; | |
132 | ||
d8647b79 SK |
133 | if (p->replay_window != 0) |
134 | return -EINVAL; | |
135 | ||
136 | return 0; | |
137 | } | |
df71837d | 138 | |
1da177e4 | 139 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 140 | struct nlattr **attrs) |
1da177e4 LT |
141 | { |
142 | int err; | |
143 | ||
144 | err = -EINVAL; | |
145 | switch (p->family) { | |
146 | case AF_INET: | |
147 | break; | |
148 | ||
149 | case AF_INET6: | |
150 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
151 | break; | |
152 | #else | |
153 | err = -EAFNOSUPPORT; | |
154 | goto out; | |
155 | #endif | |
156 | ||
157 | default: | |
158 | goto out; | |
3ff50b79 | 159 | } |
1da177e4 LT |
160 | |
161 | err = -EINVAL; | |
162 | switch (p->id.proto) { | |
163 | case IPPROTO_AH: | |
4447bb33 MW |
164 | if ((!attrs[XFRMA_ALG_AUTH] && |
165 | !attrs[XFRMA_ALG_AUTH_TRUNC]) || | |
1a6509d9 | 166 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 167 | attrs[XFRMA_ALG_CRYPT] || |
35d2856b MW |
168 | attrs[XFRMA_ALG_COMP] || |
169 | attrs[XFRMA_TFCPAD]) | |
1da177e4 LT |
170 | goto out; |
171 | break; | |
172 | ||
173 | case IPPROTO_ESP: | |
1a6509d9 HX |
174 | if (attrs[XFRMA_ALG_COMP]) |
175 | goto out; | |
176 | if (!attrs[XFRMA_ALG_AUTH] && | |
4447bb33 | 177 | !attrs[XFRMA_ALG_AUTH_TRUNC] && |
1a6509d9 HX |
178 | !attrs[XFRMA_ALG_CRYPT] && |
179 | !attrs[XFRMA_ALG_AEAD]) | |
180 | goto out; | |
181 | if ((attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 182 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 HX |
183 | attrs[XFRMA_ALG_CRYPT]) && |
184 | attrs[XFRMA_ALG_AEAD]) | |
1da177e4 | 185 | goto out; |
35d2856b MW |
186 | if (attrs[XFRMA_TFCPAD] && |
187 | p->mode != XFRM_MODE_TUNNEL) | |
188 | goto out; | |
1da177e4 LT |
189 | break; |
190 | ||
191 | case IPPROTO_COMP: | |
35a7aa08 | 192 | if (!attrs[XFRMA_ALG_COMP] || |
1a6509d9 | 193 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 194 | attrs[XFRMA_ALG_AUTH] || |
4447bb33 | 195 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
35d2856b MW |
196 | attrs[XFRMA_ALG_CRYPT] || |
197 | attrs[XFRMA_TFCPAD]) | |
1da177e4 LT |
198 | goto out; |
199 | break; | |
200 | ||
e23c7194 MN |
201 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
202 | case IPPROTO_DSTOPTS: | |
203 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
204 | if (attrs[XFRMA_ALG_COMP] || |
205 | attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 206 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 | 207 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
208 | attrs[XFRMA_ALG_CRYPT] || |
209 | attrs[XFRMA_ENCAP] || | |
210 | attrs[XFRMA_SEC_CTX] || | |
35d2856b | 211 | attrs[XFRMA_TFCPAD] || |
35a7aa08 | 212 | !attrs[XFRMA_COADDR]) |
e23c7194 MN |
213 | goto out; |
214 | break; | |
215 | #endif | |
216 | ||
1da177e4 LT |
217 | default: |
218 | goto out; | |
3ff50b79 | 219 | } |
1da177e4 | 220 | |
1a6509d9 HX |
221 | if ((err = verify_aead(attrs))) |
222 | goto out; | |
4447bb33 MW |
223 | if ((err = verify_auth_trunc(attrs))) |
224 | goto out; | |
35a7aa08 | 225 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 226 | goto out; |
35a7aa08 | 227 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 228 | goto out; |
35a7aa08 | 229 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 230 | goto out; |
35a7aa08 | 231 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 232 | goto out; |
d8647b79 SK |
233 | if ((err = verify_replay(p, attrs))) |
234 | goto out; | |
1da177e4 LT |
235 | |
236 | err = -EINVAL; | |
237 | switch (p->mode) { | |
7e49e6de MN |
238 | case XFRM_MODE_TRANSPORT: |
239 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 240 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 241 | case XFRM_MODE_BEET: |
1da177e4 LT |
242 | break; |
243 | ||
244 | default: | |
245 | goto out; | |
3ff50b79 | 246 | } |
1da177e4 LT |
247 | |
248 | err = 0; | |
249 | ||
250 | out: | |
251 | return err; | |
252 | } | |
253 | ||
254 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
6f2f19ed | 255 | struct xfrm_algo_desc *(*get_byname)(const char *, int), |
5424f32e | 256 | struct nlattr *rta) |
1da177e4 | 257 | { |
1da177e4 LT |
258 | struct xfrm_algo *p, *ualg; |
259 | struct xfrm_algo_desc *algo; | |
260 | ||
261 | if (!rta) | |
262 | return 0; | |
263 | ||
5424f32e | 264 | ualg = nla_data(rta); |
1da177e4 LT |
265 | |
266 | algo = get_byname(ualg->alg_name, 1); | |
267 | if (!algo) | |
268 | return -ENOSYS; | |
269 | *props = algo->desc.sadb_alg_id; | |
270 | ||
0f99be0d | 271 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
272 | if (!p) |
273 | return -ENOMEM; | |
274 | ||
04ff1260 | 275 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
276 | *algpp = p; |
277 | return 0; | |
278 | } | |
279 | ||
4447bb33 MW |
280 | static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, |
281 | struct nlattr *rta) | |
282 | { | |
283 | struct xfrm_algo *ualg; | |
284 | struct xfrm_algo_auth *p; | |
285 | struct xfrm_algo_desc *algo; | |
286 | ||
287 | if (!rta) | |
288 | return 0; | |
289 | ||
290 | ualg = nla_data(rta); | |
291 | ||
292 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
293 | if (!algo) | |
294 | return -ENOSYS; | |
295 | *props = algo->desc.sadb_alg_id; | |
296 | ||
297 | p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); | |
298 | if (!p) | |
299 | return -ENOMEM; | |
300 | ||
301 | strcpy(p->alg_name, algo->name); | |
302 | p->alg_key_len = ualg->alg_key_len; | |
303 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
304 | memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); | |
305 | ||
306 | *algpp = p; | |
307 | return 0; | |
308 | } | |
309 | ||
310 | static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, | |
311 | struct nlattr *rta) | |
312 | { | |
313 | struct xfrm_algo_auth *p, *ualg; | |
314 | struct xfrm_algo_desc *algo; | |
315 | ||
316 | if (!rta) | |
317 | return 0; | |
318 | ||
319 | ualg = nla_data(rta); | |
320 | ||
321 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
322 | if (!algo) | |
323 | return -ENOSYS; | |
fa6dd8a2 ND |
324 | if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN || |
325 | ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) | |
4447bb33 MW |
326 | return -EINVAL; |
327 | *props = algo->desc.sadb_alg_id; | |
328 | ||
329 | p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); | |
330 | if (!p) | |
331 | return -ENOMEM; | |
332 | ||
333 | strcpy(p->alg_name, algo->name); | |
334 | if (!p->alg_trunc_len) | |
335 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
336 | ||
337 | *algpp = p; | |
338 | return 0; | |
339 | } | |
340 | ||
1a6509d9 HX |
341 | static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, |
342 | struct nlattr *rta) | |
343 | { | |
344 | struct xfrm_algo_aead *p, *ualg; | |
345 | struct xfrm_algo_desc *algo; | |
346 | ||
347 | if (!rta) | |
348 | return 0; | |
349 | ||
350 | ualg = nla_data(rta); | |
351 | ||
352 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); | |
353 | if (!algo) | |
354 | return -ENOSYS; | |
355 | *props = algo->desc.sadb_alg_id; | |
356 | ||
357 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); | |
358 | if (!p) | |
359 | return -ENOMEM; | |
360 | ||
361 | strcpy(p->alg_name, algo->name); | |
362 | *algpp = p; | |
363 | return 0; | |
364 | } | |
365 | ||
e2b19125 SK |
366 | static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, |
367 | struct nlattr *rp) | |
368 | { | |
369 | struct xfrm_replay_state_esn *up; | |
370 | ||
371 | if (!replay_esn || !rp) | |
372 | return 0; | |
373 | ||
374 | up = nla_data(rp); | |
375 | ||
376 | if (xfrm_replay_state_esn_len(replay_esn) != | |
377 | xfrm_replay_state_esn_len(up)) | |
378 | return -EINVAL; | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
d8647b79 SK |
383 | static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, |
384 | struct xfrm_replay_state_esn **preplay_esn, | |
385 | struct nlattr *rta) | |
386 | { | |
387 | struct xfrm_replay_state_esn *p, *pp, *up; | |
388 | ||
389 | if (!rta) | |
390 | return 0; | |
391 | ||
392 | up = nla_data(rta); | |
393 | ||
394 | p = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL); | |
395 | if (!p) | |
396 | return -ENOMEM; | |
397 | ||
398 | pp = kmemdup(up, xfrm_replay_state_esn_len(up), GFP_KERNEL); | |
399 | if (!pp) { | |
400 | kfree(p); | |
401 | return -ENOMEM; | |
402 | } | |
403 | ||
404 | *replay_esn = p; | |
405 | *preplay_esn = pp; | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
661697f7 | 410 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 411 | { |
df71837d TJ |
412 | int len = 0; |
413 | ||
414 | if (xfrm_ctx) { | |
415 | len += sizeof(struct xfrm_user_sec_ctx); | |
416 | len += xfrm_ctx->ctx_len; | |
417 | } | |
418 | return len; | |
419 | } | |
420 | ||
1da177e4 LT |
421 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
422 | { | |
423 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
424 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
425 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
426 | x->props.mode = p->mode; | |
427 | x->props.replay_window = p->replay_window; | |
428 | x->props.reqid = p->reqid; | |
429 | x->props.family = p->family; | |
54489c14 | 430 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 431 | x->props.flags = p->flags; |
196b0036 | 432 | |
ccf9b3b8 | 433 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
196b0036 | 434 | x->sel.family = p->family; |
1da177e4 LT |
435 | } |
436 | ||
d51d081d JHS |
437 | /* |
438 | * someday when pfkey also has support, we could have the code | |
439 | * somehow made shareable and move it to xfrm_state.c - JHS | |
440 | * | |
441 | */ | |
5424f32e | 442 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) |
d51d081d | 443 | { |
5424f32e | 444 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 445 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e TG |
446 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
447 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
448 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d | 449 | |
d8647b79 SK |
450 | if (re) { |
451 | struct xfrm_replay_state_esn *replay_esn; | |
452 | replay_esn = nla_data(re); | |
453 | memcpy(x->replay_esn, replay_esn, | |
454 | xfrm_replay_state_esn_len(replay_esn)); | |
455 | memcpy(x->preplay_esn, replay_esn, | |
456 | xfrm_replay_state_esn_len(replay_esn)); | |
457 | } | |
458 | ||
d51d081d JHS |
459 | if (rp) { |
460 | struct xfrm_replay_state *replay; | |
5424f32e | 461 | replay = nla_data(rp); |
d51d081d JHS |
462 | memcpy(&x->replay, replay, sizeof(*replay)); |
463 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
464 | } | |
465 | ||
466 | if (lt) { | |
467 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 468 | ltime = nla_data(lt); |
d51d081d JHS |
469 | x->curlft.bytes = ltime->bytes; |
470 | x->curlft.packets = ltime->packets; | |
471 | x->curlft.add_time = ltime->add_time; | |
472 | x->curlft.use_time = ltime->use_time; | |
473 | } | |
474 | ||
cf5cb79f | 475 | if (et) |
5424f32e | 476 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 477 | |
cf5cb79f | 478 | if (rt) |
5424f32e | 479 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
480 | } |
481 | ||
fc34acd3 AD |
482 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
483 | struct xfrm_usersa_info *p, | |
5424f32e | 484 | struct nlattr **attrs, |
1da177e4 LT |
485 | int *errp) |
486 | { | |
fc34acd3 | 487 | struct xfrm_state *x = xfrm_state_alloc(net); |
1da177e4 LT |
488 | int err = -ENOMEM; |
489 | ||
490 | if (!x) | |
491 | goto error_no_put; | |
492 | ||
493 | copy_from_user_state(x, p); | |
494 | ||
1a6509d9 HX |
495 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
496 | attrs[XFRMA_ALG_AEAD]))) | |
497 | goto error; | |
4447bb33 MW |
498 | if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, |
499 | attrs[XFRMA_ALG_AUTH_TRUNC]))) | |
1da177e4 | 500 | goto error; |
4447bb33 MW |
501 | if (!x->props.aalgo) { |
502 | if ((err = attach_auth(&x->aalg, &x->props.aalgo, | |
503 | attrs[XFRMA_ALG_AUTH]))) | |
504 | goto error; | |
505 | } | |
1da177e4 LT |
506 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, |
507 | xfrm_ealg_get_byname, | |
35a7aa08 | 508 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
509 | goto error; |
510 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
511 | xfrm_calg_get_byname, | |
35a7aa08 | 512 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 513 | goto error; |
fd21150a TG |
514 | |
515 | if (attrs[XFRMA_ENCAP]) { | |
516 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
517 | sizeof(*x->encap), GFP_KERNEL); | |
518 | if (x->encap == NULL) | |
519 | goto error; | |
520 | } | |
521 | ||
35d2856b MW |
522 | if (attrs[XFRMA_TFCPAD]) |
523 | x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); | |
524 | ||
fd21150a TG |
525 | if (attrs[XFRMA_COADDR]) { |
526 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
527 | sizeof(*x->coaddr), GFP_KERNEL); | |
528 | if (x->coaddr == NULL) | |
529 | goto error; | |
530 | } | |
531 | ||
6f26b61e JHS |
532 | xfrm_mark_get(attrs, &x->mark); |
533 | ||
a454f0cc | 534 | err = __xfrm_init_state(x, false); |
1da177e4 LT |
535 | if (err) |
536 | goto error; | |
537 | ||
fd21150a TG |
538 | if (attrs[XFRMA_SEC_CTX] && |
539 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
540 | goto error; |
541 | ||
d8647b79 SK |
542 | if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, |
543 | attrs[XFRMA_REPLAY_ESN_VAL]))) | |
544 | goto error; | |
545 | ||
1da177e4 | 546 | x->km.seq = p->seq; |
b27aeadb | 547 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
d51d081d | 548 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
b27aeadb | 549 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
d51d081d | 550 | |
9fdc4883 SK |
551 | if ((err = xfrm_init_replay(x))) |
552 | goto error; | |
d51d081d | 553 | |
9fdc4883 | 554 | /* override default values from above */ |
5424f32e | 555 | xfrm_update_ae_params(x, attrs); |
1da177e4 LT |
556 | |
557 | return x; | |
558 | ||
559 | error: | |
560 | x->km.state = XFRM_STATE_DEAD; | |
561 | xfrm_state_put(x); | |
562 | error_no_put: | |
563 | *errp = err; | |
564 | return NULL; | |
565 | } | |
566 | ||
22e70050 | 567 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 568 | struct nlattr **attrs) |
1da177e4 | 569 | { |
fc34acd3 | 570 | struct net *net = sock_net(skb->sk); |
7b67c857 | 571 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
572 | struct xfrm_state *x; |
573 | int err; | |
26b15dad | 574 | struct km_event c; |
c53fa1ed PM |
575 | uid_t loginuid = audit_get_loginuid(current); |
576 | u32 sessionid = audit_get_sessionid(current); | |
577 | u32 sid; | |
1da177e4 | 578 | |
35a7aa08 | 579 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
580 | if (err) |
581 | return err; | |
582 | ||
fc34acd3 | 583 | x = xfrm_state_construct(net, p, attrs, &err); |
1da177e4 LT |
584 | if (!x) |
585 | return err; | |
586 | ||
26b15dad | 587 | xfrm_state_hold(x); |
1da177e4 LT |
588 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
589 | err = xfrm_state_add(x); | |
590 | else | |
591 | err = xfrm_state_update(x); | |
592 | ||
c53fa1ed | 593 | security_task_getsecid(current, &sid); |
2532386f | 594 | xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 595 | |
1da177e4 LT |
596 | if (err < 0) { |
597 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 598 | __xfrm_state_put(x); |
7d6dfe1f | 599 | goto out; |
1da177e4 LT |
600 | } |
601 | ||
26b15dad JHS |
602 | c.seq = nlh->nlmsg_seq; |
603 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 604 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
605 | |
606 | km_state_notify(x, &c); | |
7d6dfe1f | 607 | out: |
26b15dad | 608 | xfrm_state_put(x); |
1da177e4 LT |
609 | return err; |
610 | } | |
611 | ||
fc34acd3 AD |
612 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
613 | struct xfrm_usersa_id *p, | |
5424f32e | 614 | struct nlattr **attrs, |
eb2971b6 MN |
615 | int *errp) |
616 | { | |
617 | struct xfrm_state *x = NULL; | |
6f26b61e | 618 | struct xfrm_mark m; |
eb2971b6 | 619 | int err; |
6f26b61e | 620 | u32 mark = xfrm_mark_get(attrs, &m); |
eb2971b6 MN |
621 | |
622 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
623 | err = -ESRCH; | |
6f26b61e | 624 | x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); |
eb2971b6 MN |
625 | } else { |
626 | xfrm_address_t *saddr = NULL; | |
627 | ||
35a7aa08 | 628 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
629 | if (!saddr) { |
630 | err = -EINVAL; | |
631 | goto out; | |
632 | } | |
633 | ||
9abbffee | 634 | err = -ESRCH; |
6f26b61e JHS |
635 | x = xfrm_state_lookup_byaddr(net, mark, |
636 | &p->daddr, saddr, | |
221df1ed | 637 | p->proto, p->family); |
eb2971b6 MN |
638 | } |
639 | ||
640 | out: | |
641 | if (!x && errp) | |
642 | *errp = err; | |
643 | return x; | |
644 | } | |
645 | ||
22e70050 | 646 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 647 | struct nlattr **attrs) |
1da177e4 | 648 | { |
fc34acd3 | 649 | struct net *net = sock_net(skb->sk); |
1da177e4 | 650 | struct xfrm_state *x; |
eb2971b6 | 651 | int err = -ESRCH; |
26b15dad | 652 | struct km_event c; |
7b67c857 | 653 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
c53fa1ed PM |
654 | uid_t loginuid = audit_get_loginuid(current); |
655 | u32 sessionid = audit_get_sessionid(current); | |
656 | u32 sid; | |
1da177e4 | 657 | |
fc34acd3 | 658 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 | 659 | if (x == NULL) |
eb2971b6 | 660 | return err; |
1da177e4 | 661 | |
6f68dc37 | 662 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
663 | goto out; |
664 | ||
1da177e4 | 665 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
666 | err = -EPERM; |
667 | goto out; | |
1da177e4 LT |
668 | } |
669 | ||
26b15dad | 670 | err = xfrm_state_delete(x); |
161a09e7 | 671 | |
c8c05a8e CZ |
672 | if (err < 0) |
673 | goto out; | |
26b15dad JHS |
674 | |
675 | c.seq = nlh->nlmsg_seq; | |
676 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 677 | c.event = nlh->nlmsg_type; |
26b15dad | 678 | km_state_notify(x, &c); |
1da177e4 | 679 | |
c8c05a8e | 680 | out: |
c53fa1ed | 681 | security_task_getsecid(current, &sid); |
2532386f | 682 | xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid); |
c8c05a8e | 683 | xfrm_state_put(x); |
26b15dad | 684 | return err; |
1da177e4 LT |
685 | } |
686 | ||
687 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
688 | { | |
689 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
690 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
691 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
692 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
693 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 694 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
695 | p->mode = x->props.mode; |
696 | p->replay_window = x->props.replay_window; | |
697 | p->reqid = x->props.reqid; | |
698 | p->family = x->props.family; | |
699 | p->flags = x->props.flags; | |
700 | p->seq = x->km.seq; | |
701 | } | |
702 | ||
703 | struct xfrm_dump_info { | |
704 | struct sk_buff *in_skb; | |
705 | struct sk_buff *out_skb; | |
706 | u32 nlmsg_seq; | |
707 | u16 nlmsg_flags; | |
1da177e4 LT |
708 | }; |
709 | ||
c0144bea TG |
710 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
711 | { | |
c0144bea TG |
712 | struct xfrm_user_sec_ctx *uctx; |
713 | struct nlattr *attr; | |
68325d3b | 714 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
715 | |
716 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
717 | if (attr == NULL) | |
718 | return -EMSGSIZE; | |
719 | ||
720 | uctx = nla_data(attr); | |
721 | uctx->exttype = XFRMA_SEC_CTX; | |
722 | uctx->len = ctx_size; | |
723 | uctx->ctx_doi = s->ctx_doi; | |
724 | uctx->ctx_alg = s->ctx_alg; | |
725 | uctx->ctx_len = s->ctx_len; | |
726 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
4447bb33 MW |
731 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
732 | { | |
733 | struct xfrm_algo *algo; | |
734 | struct nlattr *nla; | |
735 | ||
736 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, | |
737 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); | |
738 | if (!nla) | |
739 | return -EMSGSIZE; | |
740 | ||
741 | algo = nla_data(nla); | |
742 | strcpy(algo->alg_name, auth->alg_name); | |
743 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); | |
744 | algo->alg_key_len = auth->alg_key_len; | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
68325d3b HX |
749 | /* Don't change this without updating xfrm_sa_len! */ |
750 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
751 | struct xfrm_usersa_info *p, | |
752 | struct sk_buff *skb) | |
1da177e4 | 753 | { |
1da177e4 LT |
754 | copy_to_user_state(x, p); |
755 | ||
050f009e HX |
756 | if (x->coaddr) |
757 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
758 | ||
759 | if (x->lastused) | |
760 | NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); | |
050f009e | 761 | |
1a6509d9 HX |
762 | if (x->aead) |
763 | NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
4447bb33 MW |
764 | if (x->aalg) { |
765 | if (copy_to_user_auth(x->aalg, skb)) | |
766 | goto nla_put_failure; | |
767 | ||
768 | NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC, | |
769 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
770 | } | |
1da177e4 | 771 | if (x->ealg) |
0f99be0d | 772 | NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); |
1da177e4 | 773 | if (x->calg) |
c0144bea | 774 | NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
1da177e4 LT |
775 | |
776 | if (x->encap) | |
c0144bea | 777 | NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
1da177e4 | 778 | |
35d2856b MW |
779 | if (x->tfcpad) |
780 | NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad); | |
781 | ||
6f26b61e JHS |
782 | if (xfrm_mark_put(skb, &x->mark)) |
783 | goto nla_put_failure; | |
784 | ||
d8647b79 SK |
785 | if (x->replay_esn) |
786 | NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL, | |
787 | xfrm_replay_state_esn_len(x->replay_esn), x->replay_esn); | |
788 | ||
c0144bea TG |
789 | if (x->security && copy_sec_ctx(x->security, skb) < 0) |
790 | goto nla_put_failure; | |
060f02a3 | 791 | |
68325d3b HX |
792 | return 0; |
793 | ||
794 | nla_put_failure: | |
795 | return -EMSGSIZE; | |
796 | } | |
797 | ||
798 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
799 | { | |
800 | struct xfrm_dump_info *sp = ptr; | |
801 | struct sk_buff *in_skb = sp->in_skb; | |
802 | struct sk_buff *skb = sp->out_skb; | |
803 | struct xfrm_usersa_info *p; | |
804 | struct nlmsghdr *nlh; | |
805 | int err; | |
806 | ||
68325d3b HX |
807 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
808 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
809 | if (nlh == NULL) | |
810 | return -EMSGSIZE; | |
811 | ||
812 | p = nlmsg_data(nlh); | |
813 | ||
814 | err = copy_to_user_state_extra(x, p, skb); | |
815 | if (err) | |
816 | goto nla_put_failure; | |
817 | ||
9825069d | 818 | nlmsg_end(skb, nlh); |
1da177e4 LT |
819 | return 0; |
820 | ||
c0144bea | 821 | nla_put_failure: |
9825069d | 822 | nlmsg_cancel(skb, nlh); |
68325d3b | 823 | return err; |
1da177e4 LT |
824 | } |
825 | ||
4c563f76 TT |
826 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
827 | { | |
828 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
829 | xfrm_state_walk_done(walk); | |
830 | return 0; | |
831 | } | |
832 | ||
1da177e4 LT |
833 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
834 | { | |
fc34acd3 | 835 | struct net *net = sock_net(skb->sk); |
4c563f76 | 836 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
837 | struct xfrm_dump_info info; |
838 | ||
4c563f76 TT |
839 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
840 | sizeof(cb->args) - sizeof(cb->args[0])); | |
841 | ||
1da177e4 LT |
842 | info.in_skb = cb->skb; |
843 | info.out_skb = skb; | |
844 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
845 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
846 | |
847 | if (!cb->args[0]) { | |
848 | cb->args[0] = 1; | |
849 | xfrm_state_walk_init(walk, 0); | |
850 | } | |
851 | ||
fc34acd3 | 852 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
853 | |
854 | return skb->len; | |
855 | } | |
856 | ||
857 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
858 | struct xfrm_state *x, u32 seq) | |
859 | { | |
860 | struct xfrm_dump_info info; | |
861 | struct sk_buff *skb; | |
862 | ||
7deb2264 | 863 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
864 | if (!skb) |
865 | return ERR_PTR(-ENOMEM); | |
866 | ||
1da177e4 LT |
867 | info.in_skb = in_skb; |
868 | info.out_skb = skb; | |
869 | info.nlmsg_seq = seq; | |
870 | info.nlmsg_flags = 0; | |
1da177e4 LT |
871 | |
872 | if (dump_one_state(x, 0, &info)) { | |
873 | kfree_skb(skb); | |
874 | return NULL; | |
875 | } | |
876 | ||
877 | return skb; | |
878 | } | |
879 | ||
7deb2264 TG |
880 | static inline size_t xfrm_spdinfo_msgsize(void) |
881 | { | |
882 | return NLMSG_ALIGN(4) | |
883 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
884 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
885 | } | |
886 | ||
e071041b AD |
887 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
888 | u32 pid, u32 seq, u32 flags) | |
ecfd6b18 | 889 | { |
5a6d3416 JHS |
890 | struct xfrmk_spdinfo si; |
891 | struct xfrmu_spdinfo spc; | |
892 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 JHS |
893 | struct nlmsghdr *nlh; |
894 | u32 *f; | |
895 | ||
896 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
25985edc | 897 | if (nlh == NULL) /* shouldn't really happen ... */ |
ecfd6b18 JHS |
898 | return -EMSGSIZE; |
899 | ||
900 | f = nlmsg_data(nlh); | |
901 | *f = flags; | |
e071041b | 902 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
903 | spc.incnt = si.incnt; |
904 | spc.outcnt = si.outcnt; | |
905 | spc.fwdcnt = si.fwdcnt; | |
906 | spc.inscnt = si.inscnt; | |
907 | spc.outscnt = si.outscnt; | |
908 | spc.fwdscnt = si.fwdscnt; | |
909 | sph.spdhcnt = si.spdhcnt; | |
910 | sph.spdhmcnt = si.spdhmcnt; | |
911 | ||
912 | NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); | |
913 | NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
ecfd6b18 JHS |
914 | |
915 | return nlmsg_end(skb, nlh); | |
916 | ||
917 | nla_put_failure: | |
918 | nlmsg_cancel(skb, nlh); | |
919 | return -EMSGSIZE; | |
920 | } | |
921 | ||
922 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 923 | struct nlattr **attrs) |
ecfd6b18 | 924 | { |
a6483b79 | 925 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 926 | struct sk_buff *r_skb; |
7b67c857 | 927 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
928 | u32 spid = NETLINK_CB(skb).pid; |
929 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 930 | |
7deb2264 | 931 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
932 | if (r_skb == NULL) |
933 | return -ENOMEM; | |
934 | ||
e071041b | 935 | if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0) |
ecfd6b18 JHS |
936 | BUG(); |
937 | ||
a6483b79 | 938 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
ecfd6b18 JHS |
939 | } |
940 | ||
7deb2264 TG |
941 | static inline size_t xfrm_sadinfo_msgsize(void) |
942 | { | |
943 | return NLMSG_ALIGN(4) | |
944 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
945 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
946 | } | |
947 | ||
e071041b AD |
948 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
949 | u32 pid, u32 seq, u32 flags) | |
28d8909b | 950 | { |
af11e316 JHS |
951 | struct xfrmk_sadinfo si; |
952 | struct xfrmu_sadhinfo sh; | |
28d8909b JHS |
953 | struct nlmsghdr *nlh; |
954 | u32 *f; | |
955 | ||
956 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
25985edc | 957 | if (nlh == NULL) /* shouldn't really happen ... */ |
28d8909b JHS |
958 | return -EMSGSIZE; |
959 | ||
960 | f = nlmsg_data(nlh); | |
961 | *f = flags; | |
e071041b | 962 | xfrm_sad_getinfo(net, &si); |
28d8909b | 963 | |
af11e316 JHS |
964 | sh.sadhmcnt = si.sadhmcnt; |
965 | sh.sadhcnt = si.sadhcnt; | |
966 | ||
967 | NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); | |
968 | NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
28d8909b JHS |
969 | |
970 | return nlmsg_end(skb, nlh); | |
971 | ||
972 | nla_put_failure: | |
973 | nlmsg_cancel(skb, nlh); | |
974 | return -EMSGSIZE; | |
975 | } | |
976 | ||
977 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 978 | struct nlattr **attrs) |
28d8909b | 979 | { |
a6483b79 | 980 | struct net *net = sock_net(skb->sk); |
28d8909b | 981 | struct sk_buff *r_skb; |
7b67c857 | 982 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
983 | u32 spid = NETLINK_CB(skb).pid; |
984 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 985 | |
7deb2264 | 986 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
987 | if (r_skb == NULL) |
988 | return -ENOMEM; | |
989 | ||
e071041b | 990 | if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0) |
28d8909b JHS |
991 | BUG(); |
992 | ||
a6483b79 | 993 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
28d8909b JHS |
994 | } |
995 | ||
22e70050 | 996 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 997 | struct nlattr **attrs) |
1da177e4 | 998 | { |
fc34acd3 | 999 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1000 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
1001 | struct xfrm_state *x; |
1002 | struct sk_buff *resp_skb; | |
eb2971b6 | 1003 | int err = -ESRCH; |
1da177e4 | 1004 | |
fc34acd3 | 1005 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
1006 | if (x == NULL) |
1007 | goto out_noput; | |
1008 | ||
1009 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
1010 | if (IS_ERR(resp_skb)) { | |
1011 | err = PTR_ERR(resp_skb); | |
1012 | } else { | |
a6483b79 | 1013 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
1014 | } |
1015 | xfrm_state_put(x); | |
1016 | out_noput: | |
1017 | return err; | |
1018 | } | |
1019 | ||
1020 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
1021 | { | |
1022 | switch (p->info.id.proto) { | |
1023 | case IPPROTO_AH: | |
1024 | case IPPROTO_ESP: | |
1025 | break; | |
1026 | ||
1027 | case IPPROTO_COMP: | |
1028 | /* IPCOMP spi is 16-bits. */ | |
1029 | if (p->max >= 0x10000) | |
1030 | return -EINVAL; | |
1031 | break; | |
1032 | ||
1033 | default: | |
1034 | return -EINVAL; | |
3ff50b79 | 1035 | } |
1da177e4 LT |
1036 | |
1037 | if (p->min > p->max) | |
1038 | return -EINVAL; | |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | ||
22e70050 | 1043 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1044 | struct nlattr **attrs) |
1da177e4 | 1045 | { |
fc34acd3 | 1046 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1047 | struct xfrm_state *x; |
1048 | struct xfrm_userspi_info *p; | |
1049 | struct sk_buff *resp_skb; | |
1050 | xfrm_address_t *daddr; | |
1051 | int family; | |
1052 | int err; | |
6f26b61e JHS |
1053 | u32 mark; |
1054 | struct xfrm_mark m; | |
1da177e4 | 1055 | |
7b67c857 | 1056 | p = nlmsg_data(nlh); |
1da177e4 LT |
1057 | err = verify_userspi_info(p); |
1058 | if (err) | |
1059 | goto out_noput; | |
1060 | ||
1061 | family = p->info.family; | |
1062 | daddr = &p->info.id.daddr; | |
1063 | ||
1064 | x = NULL; | |
6f26b61e JHS |
1065 | |
1066 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1067 | if (p->info.seq) { |
6f26b61e | 1068 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
1da177e4 LT |
1069 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { |
1070 | xfrm_state_put(x); | |
1071 | x = NULL; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | if (!x) | |
6f26b61e | 1076 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
1077 | p->info.id.proto, daddr, |
1078 | &p->info.saddr, 1, | |
1079 | family); | |
1080 | err = -ENOENT; | |
1081 | if (x == NULL) | |
1082 | goto out_noput; | |
1083 | ||
658b219e HX |
1084 | err = xfrm_alloc_spi(x, p->min, p->max); |
1085 | if (err) | |
1086 | goto out; | |
1da177e4 | 1087 | |
658b219e | 1088 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1089 | if (IS_ERR(resp_skb)) { |
1090 | err = PTR_ERR(resp_skb); | |
1091 | goto out; | |
1092 | } | |
1093 | ||
a6483b79 | 1094 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
1095 | |
1096 | out: | |
1097 | xfrm_state_put(x); | |
1098 | out_noput: | |
1099 | return err; | |
1100 | } | |
1101 | ||
b798a9ed | 1102 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1103 | { |
1104 | switch (dir) { | |
1105 | case XFRM_POLICY_IN: | |
1106 | case XFRM_POLICY_OUT: | |
1107 | case XFRM_POLICY_FWD: | |
1108 | break; | |
1109 | ||
1110 | default: | |
1111 | return -EINVAL; | |
3ff50b79 | 1112 | } |
1da177e4 LT |
1113 | |
1114 | return 0; | |
1115 | } | |
1116 | ||
b798a9ed | 1117 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1118 | { |
1119 | switch (type) { | |
1120 | case XFRM_POLICY_TYPE_MAIN: | |
1121 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1122 | case XFRM_POLICY_TYPE_SUB: | |
1123 | #endif | |
1124 | break; | |
1125 | ||
1126 | default: | |
1127 | return -EINVAL; | |
3ff50b79 | 1128 | } |
f7b6983f MN |
1129 | |
1130 | return 0; | |
1131 | } | |
1132 | ||
1da177e4 LT |
1133 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1134 | { | |
1135 | switch (p->share) { | |
1136 | case XFRM_SHARE_ANY: | |
1137 | case XFRM_SHARE_SESSION: | |
1138 | case XFRM_SHARE_USER: | |
1139 | case XFRM_SHARE_UNIQUE: | |
1140 | break; | |
1141 | ||
1142 | default: | |
1143 | return -EINVAL; | |
3ff50b79 | 1144 | } |
1da177e4 LT |
1145 | |
1146 | switch (p->action) { | |
1147 | case XFRM_POLICY_ALLOW: | |
1148 | case XFRM_POLICY_BLOCK: | |
1149 | break; | |
1150 | ||
1151 | default: | |
1152 | return -EINVAL; | |
3ff50b79 | 1153 | } |
1da177e4 LT |
1154 | |
1155 | switch (p->sel.family) { | |
1156 | case AF_INET: | |
1157 | break; | |
1158 | ||
1159 | case AF_INET6: | |
1160 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1161 | break; | |
1162 | #else | |
1163 | return -EAFNOSUPPORT; | |
1164 | #endif | |
1165 | ||
1166 | default: | |
1167 | return -EINVAL; | |
3ff50b79 | 1168 | } |
1da177e4 LT |
1169 | |
1170 | return verify_policy_dir(p->dir); | |
1171 | } | |
1172 | ||
5424f32e | 1173 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1174 | { |
5424f32e | 1175 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1176 | struct xfrm_user_sec_ctx *uctx; |
1177 | ||
1178 | if (!rt) | |
1179 | return 0; | |
1180 | ||
5424f32e | 1181 | uctx = nla_data(rt); |
03e1ad7b | 1182 | return security_xfrm_policy_alloc(&pol->security, uctx); |
df71837d TJ |
1183 | } |
1184 | ||
1da177e4 LT |
1185 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1186 | int nr) | |
1187 | { | |
1188 | int i; | |
1189 | ||
1190 | xp->xfrm_nr = nr; | |
1191 | for (i = 0; i < nr; i++, ut++) { | |
1192 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1193 | ||
1194 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1195 | memcpy(&t->saddr, &ut->saddr, | |
1196 | sizeof(xfrm_address_t)); | |
1197 | t->reqid = ut->reqid; | |
1198 | t->mode = ut->mode; | |
1199 | t->share = ut->share; | |
1200 | t->optional = ut->optional; | |
1201 | t->aalgos = ut->aalgos; | |
1202 | t->ealgos = ut->ealgos; | |
1203 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1204 | /* If all masks are ~0, then we allow all algorithms. */ |
1205 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1206 | t->encap_family = ut->family; |
1da177e4 LT |
1207 | } |
1208 | } | |
1209 | ||
b4ad86bf DM |
1210 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1211 | { | |
1212 | int i; | |
1213 | ||
1214 | if (nr > XFRM_MAX_DEPTH) | |
1215 | return -EINVAL; | |
1216 | ||
1217 | for (i = 0; i < nr; i++) { | |
1218 | /* We never validated the ut->family value, so many | |
1219 | * applications simply leave it at zero. The check was | |
1220 | * never made and ut->family was ignored because all | |
1221 | * templates could be assumed to have the same family as | |
1222 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1223 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1224 | */ | |
1225 | if (!ut[i].family) | |
1226 | ut[i].family = family; | |
1227 | ||
1228 | switch (ut[i].family) { | |
1229 | case AF_INET: | |
1230 | break; | |
1231 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1232 | case AF_INET6: | |
1233 | break; | |
1234 | #endif | |
1235 | default: | |
1236 | return -EINVAL; | |
3ff50b79 | 1237 | } |
b4ad86bf DM |
1238 | } |
1239 | ||
1240 | return 0; | |
1241 | } | |
1242 | ||
5424f32e | 1243 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1244 | { |
5424f32e | 1245 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1246 | |
1247 | if (!rt) { | |
1248 | pol->xfrm_nr = 0; | |
1249 | } else { | |
5424f32e TG |
1250 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1251 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1252 | int err; |
1da177e4 | 1253 | |
b4ad86bf DM |
1254 | err = validate_tmpl(nr, utmpl, pol->family); |
1255 | if (err) | |
1256 | return err; | |
1da177e4 | 1257 | |
5424f32e | 1258 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1259 | } |
1260 | return 0; | |
1261 | } | |
1262 | ||
5424f32e | 1263 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1264 | { |
5424f32e | 1265 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1266 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1267 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1268 | int err; |
1269 | ||
1270 | if (rt) { | |
5424f32e | 1271 | upt = nla_data(rt); |
f7b6983f MN |
1272 | type = upt->type; |
1273 | } | |
1274 | ||
1275 | err = verify_policy_type(type); | |
1276 | if (err) | |
1277 | return err; | |
1278 | ||
1279 | *tp = type; | |
1280 | return 0; | |
1281 | } | |
1282 | ||
1da177e4 LT |
1283 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1284 | { | |
1285 | xp->priority = p->priority; | |
1286 | xp->index = p->index; | |
1287 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1288 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1289 | xp->action = p->action; | |
1290 | xp->flags = p->flags; | |
1291 | xp->family = p->sel.family; | |
1292 | /* XXX xp->share = p->share; */ | |
1293 | } | |
1294 | ||
1295 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1296 | { | |
1297 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1298 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1299 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1300 | p->priority = xp->priority; | |
1301 | p->index = xp->index; | |
1302 | p->sel.family = xp->family; | |
1303 | p->dir = dir; | |
1304 | p->action = xp->action; | |
1305 | p->flags = xp->flags; | |
1306 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1307 | } | |
1308 | ||
fc34acd3 | 1309 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1310 | { |
fc34acd3 | 1311 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1312 | int err; |
1313 | ||
1314 | if (!xp) { | |
1315 | *errp = -ENOMEM; | |
1316 | return NULL; | |
1317 | } | |
1318 | ||
1319 | copy_from_user_policy(xp, p); | |
df71837d | 1320 | |
35a7aa08 | 1321 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1322 | if (err) |
1323 | goto error; | |
1324 | ||
35a7aa08 TG |
1325 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1326 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1327 | if (err) |
1328 | goto error; | |
1da177e4 | 1329 | |
295fae56 JHS |
1330 | xfrm_mark_get(attrs, &xp->mark); |
1331 | ||
1da177e4 | 1332 | return xp; |
f7b6983f MN |
1333 | error: |
1334 | *errp = err; | |
12a169e7 | 1335 | xp->walk.dead = 1; |
64c31b3f | 1336 | xfrm_policy_destroy(xp); |
f7b6983f | 1337 | return NULL; |
1da177e4 LT |
1338 | } |
1339 | ||
22e70050 | 1340 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1341 | struct nlattr **attrs) |
1da177e4 | 1342 | { |
fc34acd3 | 1343 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1344 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1345 | struct xfrm_policy *xp; |
26b15dad | 1346 | struct km_event c; |
1da177e4 LT |
1347 | int err; |
1348 | int excl; | |
c53fa1ed PM |
1349 | uid_t loginuid = audit_get_loginuid(current); |
1350 | u32 sessionid = audit_get_sessionid(current); | |
1351 | u32 sid; | |
1da177e4 LT |
1352 | |
1353 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1354 | if (err) |
1355 | return err; | |
35a7aa08 | 1356 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1357 | if (err) |
1358 | return err; | |
1359 | ||
fc34acd3 | 1360 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1361 | if (!xp) |
1362 | return err; | |
1363 | ||
25985edc | 1364 | /* shouldn't excl be based on nlh flags?? |
26b15dad JHS |
1365 | * Aha! this is anti-netlink really i.e more pfkey derived |
1366 | * in netlink excl is a flag and you wouldnt need | |
1367 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1368 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1369 | err = xfrm_policy_insert(p->dir, xp, excl); | |
c53fa1ed | 1370 | security_task_getsecid(current, &sid); |
2532386f | 1371 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 1372 | |
1da177e4 | 1373 | if (err) { |
03e1ad7b | 1374 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1375 | kfree(xp); |
1376 | return err; | |
1377 | } | |
1378 | ||
f60f6b8f | 1379 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1380 | c.seq = nlh->nlmsg_seq; |
1381 | c.pid = nlh->nlmsg_pid; | |
1382 | km_policy_notify(xp, p->dir, &c); | |
1383 | ||
1da177e4 LT |
1384 | xfrm_pol_put(xp); |
1385 | ||
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1390 | { | |
1391 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1392 | int i; | |
1393 | ||
1394 | if (xp->xfrm_nr == 0) | |
1395 | return 0; | |
1396 | ||
1397 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1398 | struct xfrm_user_tmpl *up = &vec[i]; | |
1399 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1400 | ||
1401 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1402 | up->family = kp->encap_family; |
1da177e4 LT |
1403 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1404 | up->reqid = kp->reqid; | |
1405 | up->mode = kp->mode; | |
1406 | up->share = kp->share; | |
1407 | up->optional = kp->optional; | |
1408 | up->aalgos = kp->aalgos; | |
1409 | up->ealgos = kp->ealgos; | |
1410 | up->calgos = kp->calgos; | |
1411 | } | |
df71837d | 1412 | |
c0144bea TG |
1413 | return nla_put(skb, XFRMA_TMPL, |
1414 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1415 | } |
1416 | ||
1417 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1418 | { | |
1419 | if (x->security) { | |
1420 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1421 | } |
1422 | return 0; | |
0d681623 | 1423 | } |
df71837d | 1424 | |
0d681623 SH |
1425 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1426 | { | |
1427 | if (xp->security) { | |
1428 | return copy_sec_ctx(xp->security, skb); | |
1429 | } | |
1430 | return 0; | |
df71837d | 1431 | } |
cfbfd45a TG |
1432 | static inline size_t userpolicy_type_attrsize(void) |
1433 | { | |
1434 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1435 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1436 | #else | |
1437 | return 0; | |
1438 | #endif | |
1439 | } | |
df71837d | 1440 | |
f7b6983f | 1441 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1442 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1443 | { |
c0144bea TG |
1444 | struct xfrm_userpolicy_type upt = { |
1445 | .type = type, | |
1446 | }; | |
f7b6983f | 1447 | |
c0144bea | 1448 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1449 | } |
1450 | ||
1451 | #else | |
b798a9ed | 1452 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1453 | { |
1454 | return 0; | |
1455 | } | |
1456 | #endif | |
1457 | ||
1da177e4 LT |
1458 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1459 | { | |
1460 | struct xfrm_dump_info *sp = ptr; | |
1461 | struct xfrm_userpolicy_info *p; | |
1462 | struct sk_buff *in_skb = sp->in_skb; | |
1463 | struct sk_buff *skb = sp->out_skb; | |
1464 | struct nlmsghdr *nlh; | |
1da177e4 | 1465 | |
79b8b7f4 TG |
1466 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1467 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1468 | if (nlh == NULL) | |
1469 | return -EMSGSIZE; | |
1da177e4 | 1470 | |
7b67c857 | 1471 | p = nlmsg_data(nlh); |
1da177e4 LT |
1472 | copy_to_user_policy(xp, p, dir); |
1473 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1474 | goto nlmsg_failure; | |
df71837d TJ |
1475 | if (copy_to_user_sec_ctx(xp, skb)) |
1476 | goto nlmsg_failure; | |
1459bb36 | 1477 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1478 | goto nlmsg_failure; |
295fae56 JHS |
1479 | if (xfrm_mark_put(skb, &xp->mark)) |
1480 | goto nla_put_failure; | |
1da177e4 | 1481 | |
9825069d | 1482 | nlmsg_end(skb, nlh); |
1da177e4 LT |
1483 | return 0; |
1484 | ||
295fae56 | 1485 | nla_put_failure: |
1da177e4 | 1486 | nlmsg_failure: |
9825069d TG |
1487 | nlmsg_cancel(skb, nlh); |
1488 | return -EMSGSIZE; | |
1da177e4 LT |
1489 | } |
1490 | ||
4c563f76 TT |
1491 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1492 | { | |
1493 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
1494 | ||
1495 | xfrm_policy_walk_done(walk); | |
1496 | return 0; | |
1497 | } | |
1498 | ||
1da177e4 LT |
1499 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1500 | { | |
fc34acd3 | 1501 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1502 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1503 | struct xfrm_dump_info info; |
1504 | ||
4c563f76 TT |
1505 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1506 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1507 | ||
1da177e4 LT |
1508 | info.in_skb = cb->skb; |
1509 | info.out_skb = skb; | |
1510 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1511 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1512 | |
1513 | if (!cb->args[0]) { | |
1514 | cb->args[0] = 1; | |
1515 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1516 | } | |
1517 | ||
fc34acd3 | 1518 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1519 | |
1520 | return skb->len; | |
1521 | } | |
1522 | ||
1523 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1524 | struct xfrm_policy *xp, | |
1525 | int dir, u32 seq) | |
1526 | { | |
1527 | struct xfrm_dump_info info; | |
1528 | struct sk_buff *skb; | |
1529 | ||
7deb2264 | 1530 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1531 | if (!skb) |
1532 | return ERR_PTR(-ENOMEM); | |
1533 | ||
1da177e4 LT |
1534 | info.in_skb = in_skb; |
1535 | info.out_skb = skb; | |
1536 | info.nlmsg_seq = seq; | |
1537 | info.nlmsg_flags = 0; | |
1da177e4 LT |
1538 | |
1539 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1540 | kfree_skb(skb); | |
1541 | return NULL; | |
1542 | } | |
1543 | ||
1544 | return skb; | |
1545 | } | |
1546 | ||
22e70050 | 1547 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1548 | struct nlattr **attrs) |
1da177e4 | 1549 | { |
fc34acd3 | 1550 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1551 | struct xfrm_policy *xp; |
1552 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1553 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1554 | int err; |
26b15dad | 1555 | struct km_event c; |
1da177e4 | 1556 | int delete; |
295fae56 JHS |
1557 | struct xfrm_mark m; |
1558 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1559 | |
7b67c857 | 1560 | p = nlmsg_data(nlh); |
1da177e4 LT |
1561 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1562 | ||
35a7aa08 | 1563 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1564 | if (err) |
1565 | return err; | |
1566 | ||
1da177e4 LT |
1567 | err = verify_policy_dir(p->dir); |
1568 | if (err) | |
1569 | return err; | |
1570 | ||
1571 | if (p->index) | |
295fae56 | 1572 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1573 | else { |
5424f32e | 1574 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1575 | struct xfrm_sec_ctx *ctx; |
df71837d | 1576 | |
35a7aa08 | 1577 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1578 | if (err) |
1579 | return err; | |
1580 | ||
2c8dd116 | 1581 | ctx = NULL; |
df71837d | 1582 | if (rt) { |
5424f32e | 1583 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1584 | |
03e1ad7b PM |
1585 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1586 | if (err) | |
df71837d | 1587 | return err; |
2c8dd116 | 1588 | } |
295fae56 | 1589 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1590 | ctx, delete, &err); |
03e1ad7b | 1591 | security_xfrm_policy_free(ctx); |
df71837d | 1592 | } |
1da177e4 LT |
1593 | if (xp == NULL) |
1594 | return -ENOENT; | |
1595 | ||
1596 | if (!delete) { | |
1597 | struct sk_buff *resp_skb; | |
1598 | ||
1599 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1600 | if (IS_ERR(resp_skb)) { | |
1601 | err = PTR_ERR(resp_skb); | |
1602 | } else { | |
a6483b79 | 1603 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
082a1ad5 | 1604 | NETLINK_CB(skb).pid); |
1da177e4 | 1605 | } |
26b15dad | 1606 | } else { |
c53fa1ed PM |
1607 | uid_t loginuid = audit_get_loginuid(current); |
1608 | u32 sessionid = audit_get_sessionid(current); | |
1609 | u32 sid; | |
2532386f | 1610 | |
c53fa1ed | 1611 | security_task_getsecid(current, &sid); |
2532386f EP |
1612 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, |
1613 | sid); | |
13fcfbb0 DM |
1614 | |
1615 | if (err != 0) | |
c8c05a8e | 1616 | goto out; |
13fcfbb0 | 1617 | |
e7443892 | 1618 | c.data.byid = p->index; |
f60f6b8f | 1619 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1620 | c.seq = nlh->nlmsg_seq; |
1621 | c.pid = nlh->nlmsg_pid; | |
1622 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1623 | } |
1624 | ||
c8c05a8e | 1625 | out: |
ef41aaa0 | 1626 | xfrm_pol_put(xp); |
1da177e4 LT |
1627 | return err; |
1628 | } | |
1629 | ||
22e70050 | 1630 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1631 | struct nlattr **attrs) |
1da177e4 | 1632 | { |
fc34acd3 | 1633 | struct net *net = sock_net(skb->sk); |
26b15dad | 1634 | struct km_event c; |
7b67c857 | 1635 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1636 | struct xfrm_audit audit_info; |
4aa2e62c | 1637 | int err; |
1da177e4 | 1638 | |
c53fa1ed PM |
1639 | audit_info.loginuid = audit_get_loginuid(current); |
1640 | audit_info.sessionid = audit_get_sessionid(current); | |
1641 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1642 | err = xfrm_state_flush(net, p->proto, &audit_info); |
9e64cc95 JHS |
1643 | if (err) { |
1644 | if (err == -ESRCH) /* empty table */ | |
1645 | return 0; | |
069c474e | 1646 | return err; |
9e64cc95 | 1647 | } |
bf08867f | 1648 | c.data.proto = p->proto; |
f60f6b8f | 1649 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1650 | c.seq = nlh->nlmsg_seq; |
1651 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1652 | c.net = net; |
26b15dad JHS |
1653 | km_state_notify(NULL, &c); |
1654 | ||
1da177e4 LT |
1655 | return 0; |
1656 | } | |
1657 | ||
d8647b79 | 1658 | static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) |
7deb2264 | 1659 | { |
d8647b79 SK |
1660 | size_t replay_size = x->replay_esn ? |
1661 | xfrm_replay_state_esn_len(x->replay_esn) : | |
1662 | sizeof(struct xfrm_replay_state); | |
1663 | ||
7deb2264 | 1664 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) |
d8647b79 | 1665 | + nla_total_size(replay_size) |
7deb2264 | 1666 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) |
6f26b61e | 1667 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1668 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1669 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1670 | } | |
d51d081d | 1671 | |
214e005b | 1672 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
d51d081d JHS |
1673 | { |
1674 | struct xfrm_aevent_id *id; | |
1675 | struct nlmsghdr *nlh; | |
d51d081d | 1676 | |
79b8b7f4 TG |
1677 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1678 | if (nlh == NULL) | |
1679 | return -EMSGSIZE; | |
d51d081d | 1680 | |
7b67c857 | 1681 | id = nlmsg_data(nlh); |
2b5f6dcc | 1682 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1683 | id->sa_id.spi = x->id.spi; |
1684 | id->sa_id.family = x->props.family; | |
1685 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1686 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1687 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1688 | id->flags = c->data.aevent; |
1689 | ||
d8647b79 SK |
1690 | if (x->replay_esn) |
1691 | NLA_PUT(skb, XFRMA_REPLAY_ESN_VAL, | |
1692 | xfrm_replay_state_esn_len(x->replay_esn), | |
1693 | x->replay_esn); | |
1694 | else | |
1695 | NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); | |
1696 | ||
c0144bea | 1697 | NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); |
d51d081d | 1698 | |
c0144bea TG |
1699 | if (id->flags & XFRM_AE_RTHR) |
1700 | NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
d51d081d | 1701 | |
c0144bea TG |
1702 | if (id->flags & XFRM_AE_ETHR) |
1703 | NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, | |
1704 | x->replay_maxage * 10 / HZ); | |
d51d081d | 1705 | |
6f26b61e JHS |
1706 | if (xfrm_mark_put(skb, &x->mark)) |
1707 | goto nla_put_failure; | |
1708 | ||
9825069d | 1709 | return nlmsg_end(skb, nlh); |
d51d081d | 1710 | |
c0144bea | 1711 | nla_put_failure: |
9825069d TG |
1712 | nlmsg_cancel(skb, nlh); |
1713 | return -EMSGSIZE; | |
d51d081d JHS |
1714 | } |
1715 | ||
22e70050 | 1716 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1717 | struct nlattr **attrs) |
d51d081d | 1718 | { |
fc34acd3 | 1719 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1720 | struct xfrm_state *x; |
1721 | struct sk_buff *r_skb; | |
1722 | int err; | |
1723 | struct km_event c; | |
6f26b61e JHS |
1724 | u32 mark; |
1725 | struct xfrm_mark m; | |
7b67c857 | 1726 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1727 | struct xfrm_usersa_id *id = &p->sa_id; |
1728 | ||
6f26b61e JHS |
1729 | mark = xfrm_mark_get(attrs, &m); |
1730 | ||
1731 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d8647b79 | 1732 | if (x == NULL) |
d51d081d | 1733 | return -ESRCH; |
d8647b79 SK |
1734 | |
1735 | r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); | |
1736 | if (r_skb == NULL) { | |
1737 | xfrm_state_put(x); | |
1738 | return -ENOMEM; | |
d51d081d JHS |
1739 | } |
1740 | ||
1741 | /* | |
1742 | * XXX: is this lock really needed - none of the other | |
1743 | * gets lock (the concern is things getting updated | |
1744 | * while we are still reading) - jhs | |
1745 | */ | |
1746 | spin_lock_bh(&x->lock); | |
1747 | c.data.aevent = p->flags; | |
1748 | c.seq = nlh->nlmsg_seq; | |
1749 | c.pid = nlh->nlmsg_pid; | |
1750 | ||
1751 | if (build_aevent(r_skb, x, &c) < 0) | |
1752 | BUG(); | |
a6483b79 | 1753 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1754 | spin_unlock_bh(&x->lock); |
1755 | xfrm_state_put(x); | |
1756 | return err; | |
1757 | } | |
1758 | ||
22e70050 | 1759 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1760 | struct nlattr **attrs) |
d51d081d | 1761 | { |
fc34acd3 | 1762 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1763 | struct xfrm_state *x; |
1764 | struct km_event c; | |
1765 | int err = - EINVAL; | |
6f26b61e JHS |
1766 | u32 mark = 0; |
1767 | struct xfrm_mark m; | |
7b67c857 | 1768 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e | 1769 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
d8647b79 | 1770 | struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; |
5424f32e | 1771 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; |
d51d081d | 1772 | |
d8647b79 | 1773 | if (!lt && !rp && !re) |
d51d081d JHS |
1774 | return err; |
1775 | ||
1776 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1777 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1778 | return err; | |
1779 | ||
6f26b61e JHS |
1780 | mark = xfrm_mark_get(attrs, &m); |
1781 | ||
1782 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1783 | if (x == NULL) |
1784 | return -ESRCH; | |
1785 | ||
1786 | if (x->km.state != XFRM_STATE_VALID) | |
1787 | goto out; | |
1788 | ||
e2b19125 SK |
1789 | err = xfrm_replay_verify_len(x->replay_esn, rp); |
1790 | if (err) | |
1791 | goto out; | |
1792 | ||
d51d081d | 1793 | spin_lock_bh(&x->lock); |
35a7aa08 | 1794 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1795 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1796 | |
1797 | c.event = nlh->nlmsg_type; | |
1798 | c.seq = nlh->nlmsg_seq; | |
1799 | c.pid = nlh->nlmsg_pid; | |
1800 | c.data.aevent = XFRM_AE_CU; | |
1801 | km_state_notify(x, &c); | |
1802 | err = 0; | |
1803 | out: | |
1804 | xfrm_state_put(x); | |
1805 | return err; | |
1806 | } | |
1807 | ||
22e70050 | 1808 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1809 | struct nlattr **attrs) |
1da177e4 | 1810 | { |
fc34acd3 | 1811 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1812 | struct km_event c; |
b798a9ed | 1813 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1814 | int err; |
161a09e7 | 1815 | struct xfrm_audit audit_info; |
f7b6983f | 1816 | |
35a7aa08 | 1817 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1818 | if (err) |
1819 | return err; | |
26b15dad | 1820 | |
c53fa1ed PM |
1821 | audit_info.loginuid = audit_get_loginuid(current); |
1822 | audit_info.sessionid = audit_get_sessionid(current); | |
1823 | security_task_getsecid(current, &audit_info.secid); | |
fc34acd3 | 1824 | err = xfrm_policy_flush(net, type, &audit_info); |
2f1eb65f JHS |
1825 | if (err) { |
1826 | if (err == -ESRCH) /* empty table */ | |
1827 | return 0; | |
069c474e | 1828 | return err; |
2f1eb65f JHS |
1829 | } |
1830 | ||
f7b6983f | 1831 | c.data.type = type; |
f60f6b8f | 1832 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1833 | c.seq = nlh->nlmsg_seq; |
1834 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1835 | c.net = net; |
26b15dad | 1836 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1837 | return 0; |
1838 | } | |
1839 | ||
22e70050 | 1840 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1841 | struct nlattr **attrs) |
6c5c8ca7 | 1842 | { |
fc34acd3 | 1843 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1844 | struct xfrm_policy *xp; |
7b67c857 | 1845 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1846 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1847 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 1848 | int err = -ENOENT; |
295fae56 JHS |
1849 | struct xfrm_mark m; |
1850 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 1851 | |
35a7aa08 | 1852 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1853 | if (err) |
1854 | return err; | |
1855 | ||
c8bf4d04 TT |
1856 | err = verify_policy_dir(p->dir); |
1857 | if (err) | |
1858 | return err; | |
1859 | ||
6c5c8ca7 | 1860 | if (p->index) |
295fae56 | 1861 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1862 | else { |
5424f32e | 1863 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1864 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1865 | |
35a7aa08 | 1866 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1867 | if (err) |
1868 | return err; | |
1869 | ||
2c8dd116 | 1870 | ctx = NULL; |
6c5c8ca7 | 1871 | if (rt) { |
5424f32e | 1872 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 1873 | |
03e1ad7b PM |
1874 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1875 | if (err) | |
6c5c8ca7 | 1876 | return err; |
2c8dd116 | 1877 | } |
295fae56 | 1878 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 1879 | &p->sel, ctx, 0, &err); |
03e1ad7b | 1880 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 1881 | } |
6c5c8ca7 | 1882 | if (xp == NULL) |
ef41aaa0 | 1883 | return -ENOENT; |
03e1ad7b | 1884 | |
ea2dea9d | 1885 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 1886 | goto out; |
6c5c8ca7 | 1887 | |
6c5c8ca7 JHS |
1888 | err = 0; |
1889 | if (up->hard) { | |
c53fa1ed PM |
1890 | uid_t loginuid = audit_get_loginuid(current); |
1891 | u32 sessionid = audit_get_sessionid(current); | |
1892 | u32 sid; | |
1893 | ||
1894 | security_task_getsecid(current, &sid); | |
6c5c8ca7 | 1895 | xfrm_policy_delete(xp, p->dir); |
2532386f | 1896 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
161a09e7 | 1897 | |
6c5c8ca7 JHS |
1898 | } else { |
1899 | // reset the timers here? | |
62db5cfd | 1900 | WARN(1, "Dont know what to do with soft policy expire\n"); |
6c5c8ca7 JHS |
1901 | } |
1902 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1903 | ||
1904 | out: | |
1905 | xfrm_pol_put(xp); | |
1906 | return err; | |
1907 | } | |
1908 | ||
22e70050 | 1909 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1910 | struct nlattr **attrs) |
53bc6b4d | 1911 | { |
fc34acd3 | 1912 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
1913 | struct xfrm_state *x; |
1914 | int err; | |
7b67c857 | 1915 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 1916 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 1917 | struct xfrm_mark m; |
928497f0 | 1918 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 1919 | |
6f26b61e | 1920 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 1921 | |
3a765aa5 | 1922 | err = -ENOENT; |
53bc6b4d JHS |
1923 | if (x == NULL) |
1924 | return err; | |
1925 | ||
53bc6b4d | 1926 | spin_lock_bh(&x->lock); |
3a765aa5 | 1927 | err = -EINVAL; |
53bc6b4d JHS |
1928 | if (x->km.state != XFRM_STATE_VALID) |
1929 | goto out; | |
1930 | km_state_expired(x, ue->hard, current->pid); | |
1931 | ||
161a09e7 | 1932 | if (ue->hard) { |
c53fa1ed PM |
1933 | uid_t loginuid = audit_get_loginuid(current); |
1934 | u32 sessionid = audit_get_sessionid(current); | |
1935 | u32 sid; | |
1936 | ||
1937 | security_task_getsecid(current, &sid); | |
53bc6b4d | 1938 | __xfrm_state_delete(x); |
2532386f | 1939 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
161a09e7 | 1940 | } |
3a765aa5 | 1941 | err = 0; |
53bc6b4d JHS |
1942 | out: |
1943 | spin_unlock_bh(&x->lock); | |
1944 | xfrm_state_put(x); | |
1945 | return err; | |
1946 | } | |
1947 | ||
22e70050 | 1948 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1949 | struct nlattr **attrs) |
980ebd25 | 1950 | { |
fc34acd3 | 1951 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
1952 | struct xfrm_policy *xp; |
1953 | struct xfrm_user_tmpl *ut; | |
1954 | int i; | |
5424f32e | 1955 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 1956 | struct xfrm_mark mark; |
980ebd25 | 1957 | |
7b67c857 | 1958 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 1959 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
1960 | int err = -ENOMEM; |
1961 | ||
1962 | if (!x) | |
d8eb9307 | 1963 | goto nomem; |
980ebd25 | 1964 | |
6f26b61e JHS |
1965 | xfrm_mark_get(attrs, &mark); |
1966 | ||
980ebd25 | 1967 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
1968 | if (err) |
1969 | goto bad_policy; | |
980ebd25 JHS |
1970 | |
1971 | /* build an XP */ | |
fc34acd3 | 1972 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
1973 | if (!xp) |
1974 | goto free_state; | |
980ebd25 JHS |
1975 | |
1976 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1977 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1978 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
1979 | xp->mark.m = x->mark.m = mark.m; |
1980 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 1981 | ut = nla_data(rt); |
980ebd25 JHS |
1982 | /* extract the templates and for each call km_key */ |
1983 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1984 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1985 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1986 | x->props.mode = t->mode; | |
1987 | x->props.reqid = t->reqid; | |
1988 | x->props.family = ut->family; | |
1989 | t->aalgos = ua->aalgos; | |
1990 | t->ealgos = ua->ealgos; | |
1991 | t->calgos = ua->calgos; | |
1992 | err = km_query(x, t, xp); | |
1993 | ||
1994 | } | |
1995 | ||
1996 | kfree(x); | |
1997 | kfree(xp); | |
1998 | ||
1999 | return 0; | |
d8eb9307 IJ |
2000 | |
2001 | bad_policy: | |
62db5cfd | 2002 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
2003 | free_state: |
2004 | kfree(x); | |
2005 | nomem: | |
2006 | return err; | |
980ebd25 JHS |
2007 | } |
2008 | ||
5c79de6e | 2009 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 2010 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 2011 | struct xfrm_kmaddress *k, |
5424f32e | 2012 | struct nlattr **attrs, int *num) |
5c79de6e | 2013 | { |
5424f32e | 2014 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
2015 | struct xfrm_user_migrate *um; |
2016 | int i, num_migrate; | |
2017 | ||
13c1d189 AE |
2018 | if (k != NULL) { |
2019 | struct xfrm_user_kmaddress *uk; | |
2020 | ||
2021 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
2022 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
2023 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
2024 | k->family = uk->family; | |
2025 | k->reserved = uk->reserved; | |
2026 | } | |
2027 | ||
5424f32e TG |
2028 | um = nla_data(rt); |
2029 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
2030 | |
2031 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
2032 | return -EINVAL; | |
2033 | ||
2034 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
2035 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
2036 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
2037 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
2038 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
2039 | ||
2040 | ma->proto = um->proto; | |
2041 | ma->mode = um->mode; | |
2042 | ma->reqid = um->reqid; | |
2043 | ||
2044 | ma->old_family = um->old_family; | |
2045 | ma->new_family = um->new_family; | |
2046 | } | |
2047 | ||
2048 | *num = i; | |
2049 | return 0; | |
2050 | } | |
2051 | ||
2052 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2053 | struct nlattr **attrs) |
5c79de6e | 2054 | { |
7b67c857 | 2055 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 2056 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 2057 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
2058 | u8 type; |
2059 | int err; | |
2060 | int n = 0; | |
2061 | ||
35a7aa08 | 2062 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 2063 | return -EINVAL; |
5c79de6e | 2064 | |
13c1d189 AE |
2065 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
2066 | ||
5424f32e | 2067 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
2068 | if (err) |
2069 | return err; | |
2070 | ||
13c1d189 | 2071 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
2072 | if (err) |
2073 | return err; | |
2074 | ||
2075 | if (!n) | |
2076 | return 0; | |
2077 | ||
13c1d189 | 2078 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); |
5c79de6e SS |
2079 | |
2080 | return 0; | |
2081 | } | |
2082 | #else | |
2083 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 2084 | struct nlattr **attrs) |
5c79de6e SS |
2085 | { |
2086 | return -ENOPROTOOPT; | |
2087 | } | |
2088 | #endif | |
2089 | ||
2090 | #ifdef CONFIG_XFRM_MIGRATE | |
183cad12 | 2091 | static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) |
5c79de6e SS |
2092 | { |
2093 | struct xfrm_user_migrate um; | |
2094 | ||
2095 | memset(&um, 0, sizeof(um)); | |
2096 | um.proto = m->proto; | |
2097 | um.mode = m->mode; | |
2098 | um.reqid = m->reqid; | |
2099 | um.old_family = m->old_family; | |
2100 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
2101 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2102 | um.new_family = m->new_family; | |
2103 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2104 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2105 | ||
c0144bea | 2106 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2107 | } |
2108 | ||
183cad12 | 2109 | static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) |
13c1d189 AE |
2110 | { |
2111 | struct xfrm_user_kmaddress uk; | |
2112 | ||
2113 | memset(&uk, 0, sizeof(uk)); | |
2114 | uk.family = k->family; | |
2115 | uk.reserved = k->reserved; | |
2116 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2117 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2118 | |
2119 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2120 | } | |
2121 | ||
2122 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2123 | { |
2124 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2125 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2126 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2127 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2128 | } |
2129 | ||
183cad12 DM |
2130 | static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, |
2131 | int num_migrate, const struct xfrm_kmaddress *k, | |
2132 | const struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e | 2133 | { |
183cad12 | 2134 | const struct xfrm_migrate *mp; |
5c79de6e SS |
2135 | struct xfrm_userpolicy_id *pol_id; |
2136 | struct nlmsghdr *nlh; | |
5c79de6e SS |
2137 | int i; |
2138 | ||
79b8b7f4 TG |
2139 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2140 | if (nlh == NULL) | |
2141 | return -EMSGSIZE; | |
5c79de6e | 2142 | |
7b67c857 | 2143 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2144 | /* copy data from selector, dir, and type to the pol_id */ |
2145 | memset(pol_id, 0, sizeof(*pol_id)); | |
2146 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2147 | pol_id->dir = dir; | |
2148 | ||
13c1d189 AE |
2149 | if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0)) |
2150 | goto nlmsg_failure; | |
2151 | ||
5c79de6e SS |
2152 | if (copy_to_user_policy_type(type, skb) < 0) |
2153 | goto nlmsg_failure; | |
2154 | ||
2155 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
2156 | if (copy_to_user_migrate(mp, skb) < 0) | |
2157 | goto nlmsg_failure; | |
2158 | } | |
2159 | ||
9825069d | 2160 | return nlmsg_end(skb, nlh); |
5c79de6e | 2161 | nlmsg_failure: |
9825069d TG |
2162 | nlmsg_cancel(skb, nlh); |
2163 | return -EMSGSIZE; | |
5c79de6e SS |
2164 | } |
2165 | ||
183cad12 DM |
2166 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2167 | const struct xfrm_migrate *m, int num_migrate, | |
2168 | const struct xfrm_kmaddress *k) | |
5c79de6e | 2169 | { |
a6483b79 | 2170 | struct net *net = &init_net; |
5c79de6e | 2171 | struct sk_buff *skb; |
5c79de6e | 2172 | |
13c1d189 | 2173 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2174 | if (skb == NULL) |
2175 | return -ENOMEM; | |
2176 | ||
2177 | /* build migrate */ | |
13c1d189 | 2178 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2179 | BUG(); |
2180 | ||
a6483b79 | 2181 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
2182 | } |
2183 | #else | |
183cad12 DM |
2184 | static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
2185 | const struct xfrm_migrate *m, int num_migrate, | |
2186 | const struct xfrm_kmaddress *k) | |
5c79de6e SS |
2187 | { |
2188 | return -ENOPROTOOPT; | |
2189 | } | |
2190 | #endif | |
d51d081d | 2191 | |
a7bd9a45 | 2192 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2193 | |
2194 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2195 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2196 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2197 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2198 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2199 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2200 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2201 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2202 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2203 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2204 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2205 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2206 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2207 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2208 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2209 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2210 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2211 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2212 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
2213 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
2214 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
2215 | }; |
2216 | ||
492b558b TG |
2217 | #undef XMSGSIZE |
2218 | ||
cf5cb79f | 2219 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2220 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2221 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2222 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2223 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2224 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2225 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2226 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2227 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2228 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2229 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2230 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2231 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2232 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2233 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2234 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2235 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2236 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2237 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2238 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2239 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2240 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2241 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
d8647b79 | 2242 | [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, |
cf5cb79f TG |
2243 | }; |
2244 | ||
1da177e4 | 2245 | static struct xfrm_link { |
5424f32e | 2246 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2247 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2248 | int (*done)(struct netlink_callback *); |
492b558b TG |
2249 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2250 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2251 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2252 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2253 | .dump = xfrm_dump_sa, |
2254 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2255 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2256 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2257 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2258 | .dump = xfrm_dump_policy, |
2259 | .done = xfrm_dump_policy_done }, | |
492b558b | 2260 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2261 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2262 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2263 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2264 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2265 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2266 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2267 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2268 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2269 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2270 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2271 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 2272 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2273 | }; |
2274 | ||
1d00a4eb | 2275 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2276 | { |
a6483b79 | 2277 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2278 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 2279 | struct xfrm_link *link; |
a7bd9a45 | 2280 | int type, err; |
1da177e4 | 2281 | |
1da177e4 | 2282 | type = nlh->nlmsg_type; |
1da177e4 | 2283 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2284 | return -EINVAL; |
1da177e4 LT |
2285 | |
2286 | type -= XFRM_MSG_BASE; | |
2287 | link = &xfrm_dispatch[type]; | |
2288 | ||
2289 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
2290 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
2291 | return -EPERM; | |
1da177e4 | 2292 | |
492b558b TG |
2293 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2294 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2295 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2296 | if (link->dump == NULL) |
1d00a4eb | 2297 | return -EINVAL; |
88fc2c84 | 2298 | |
a6483b79 | 2299 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done); |
1da177e4 LT |
2300 | } |
2301 | ||
35a7aa08 | 2302 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 2303 | xfrma_policy); |
a7bd9a45 TG |
2304 | if (err < 0) |
2305 | return err; | |
1da177e4 LT |
2306 | |
2307 | if (link->doit == NULL) | |
1d00a4eb | 2308 | return -EINVAL; |
1da177e4 | 2309 | |
5424f32e | 2310 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2311 | } |
2312 | ||
cd40b7d3 | 2313 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2314 | { |
cd40b7d3 DL |
2315 | mutex_lock(&xfrm_cfg_mutex); |
2316 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
2317 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
2318 | } |
2319 | ||
7deb2264 TG |
2320 | static inline size_t xfrm_expire_msgsize(void) |
2321 | { | |
6f26b61e JHS |
2322 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2323 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2324 | } |
2325 | ||
214e005b | 2326 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) |
1da177e4 LT |
2327 | { |
2328 | struct xfrm_user_expire *ue; | |
2329 | struct nlmsghdr *nlh; | |
1da177e4 | 2330 | |
79b8b7f4 TG |
2331 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
2332 | if (nlh == NULL) | |
2333 | return -EMSGSIZE; | |
1da177e4 | 2334 | |
7b67c857 | 2335 | ue = nlmsg_data(nlh); |
1da177e4 | 2336 | copy_to_user_state(x, &ue->state); |
d51d081d | 2337 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2338 | |
6f26b61e JHS |
2339 | if (xfrm_mark_put(skb, &x->mark)) |
2340 | goto nla_put_failure; | |
2341 | ||
9825069d | 2342 | return nlmsg_end(skb, nlh); |
6f26b61e JHS |
2343 | |
2344 | nla_put_failure: | |
2345 | return -EMSGSIZE; | |
1da177e4 LT |
2346 | } |
2347 | ||
214e005b | 2348 | static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) |
1da177e4 | 2349 | { |
fc34acd3 | 2350 | struct net *net = xs_net(x); |
1da177e4 LT |
2351 | struct sk_buff *skb; |
2352 | ||
7deb2264 | 2353 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2354 | if (skb == NULL) |
2355 | return -ENOMEM; | |
2356 | ||
6f26b61e JHS |
2357 | if (build_expire(skb, x, c) < 0) { |
2358 | kfree_skb(skb); | |
2359 | return -EMSGSIZE; | |
2360 | } | |
1da177e4 | 2361 | |
a6483b79 | 2362 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2363 | } |
2364 | ||
214e005b | 2365 | static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) |
d51d081d | 2366 | { |
fc34acd3 | 2367 | struct net *net = xs_net(x); |
d51d081d | 2368 | struct sk_buff *skb; |
d51d081d | 2369 | |
d8647b79 | 2370 | skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); |
d51d081d JHS |
2371 | if (skb == NULL) |
2372 | return -ENOMEM; | |
2373 | ||
2374 | if (build_aevent(skb, x, c) < 0) | |
2375 | BUG(); | |
2376 | ||
a6483b79 | 2377 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2378 | } |
2379 | ||
214e005b | 2380 | static int xfrm_notify_sa_flush(const struct km_event *c) |
26b15dad | 2381 | { |
7067802e | 2382 | struct net *net = c->net; |
26b15dad JHS |
2383 | struct xfrm_usersa_flush *p; |
2384 | struct nlmsghdr *nlh; | |
2385 | struct sk_buff *skb; | |
7deb2264 | 2386 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2387 | |
7deb2264 | 2388 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2389 | if (skb == NULL) |
2390 | return -ENOMEM; | |
26b15dad | 2391 | |
79b8b7f4 TG |
2392 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2393 | if (nlh == NULL) { | |
2394 | kfree_skb(skb); | |
2395 | return -EMSGSIZE; | |
2396 | } | |
26b15dad | 2397 | |
7b67c857 | 2398 | p = nlmsg_data(nlh); |
bf08867f | 2399 | p->proto = c->data.proto; |
26b15dad | 2400 | |
9825069d | 2401 | nlmsg_end(skb, nlh); |
26b15dad | 2402 | |
a6483b79 | 2403 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2404 | } |
2405 | ||
7deb2264 | 2406 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2407 | { |
7deb2264 | 2408 | size_t l = 0; |
1a6509d9 HX |
2409 | if (x->aead) |
2410 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2411 | if (x->aalg) { |
2412 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2413 | (x->aalg->alg_key_len + 7) / 8); | |
2414 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2415 | } | |
26b15dad | 2416 | if (x->ealg) |
0f99be0d | 2417 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2418 | if (x->calg) |
7deb2264 | 2419 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2420 | if (x->encap) |
7deb2264 | 2421 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2422 | if (x->tfcpad) |
2423 | l += nla_total_size(sizeof(x->tfcpad)); | |
d8647b79 SK |
2424 | if (x->replay_esn) |
2425 | l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); | |
68325d3b HX |
2426 | if (x->security) |
2427 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2428 | x->security->ctx_len); | |
2429 | if (x->coaddr) | |
2430 | l += nla_total_size(sizeof(*x->coaddr)); | |
2431 | ||
d26f3984 HX |
2432 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2433 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2434 | |
2435 | return l; | |
2436 | } | |
2437 | ||
214e005b | 2438 | static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) |
26b15dad | 2439 | { |
fc34acd3 | 2440 | struct net *net = xs_net(x); |
26b15dad | 2441 | struct xfrm_usersa_info *p; |
0603eac0 | 2442 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2443 | struct nlmsghdr *nlh; |
2444 | struct sk_buff *skb; | |
26b15dad | 2445 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2446 | int headlen; |
2447 | ||
2448 | headlen = sizeof(*p); | |
2449 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2450 | len += nla_total_size(headlen); |
0603eac0 | 2451 | headlen = sizeof(*id); |
6f26b61e | 2452 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2453 | } |
7deb2264 | 2454 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2455 | |
7deb2264 | 2456 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2457 | if (skb == NULL) |
2458 | return -ENOMEM; | |
26b15dad | 2459 | |
79b8b7f4 TG |
2460 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2461 | if (nlh == NULL) | |
c0144bea | 2462 | goto nla_put_failure; |
26b15dad | 2463 | |
7b67c857 | 2464 | p = nlmsg_data(nlh); |
0603eac0 | 2465 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2466 | struct nlattr *attr; |
2467 | ||
7b67c857 | 2468 | id = nlmsg_data(nlh); |
0603eac0 HX |
2469 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2470 | id->spi = x->id.spi; | |
2471 | id->family = x->props.family; | |
2472 | id->proto = x->id.proto; | |
2473 | ||
c0144bea TG |
2474 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
2475 | if (attr == NULL) | |
2476 | goto nla_put_failure; | |
2477 | ||
2478 | p = nla_data(attr); | |
0603eac0 HX |
2479 | } |
2480 | ||
68325d3b HX |
2481 | if (copy_to_user_state_extra(x, p, skb)) |
2482 | goto nla_put_failure; | |
26b15dad | 2483 | |
9825069d | 2484 | nlmsg_end(skb, nlh); |
26b15dad | 2485 | |
a6483b79 | 2486 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2487 | |
c0144bea | 2488 | nla_put_failure: |
68325d3b HX |
2489 | /* Somebody screwed up with xfrm_sa_len! */ |
2490 | WARN_ON(1); | |
26b15dad JHS |
2491 | kfree_skb(skb); |
2492 | return -1; | |
2493 | } | |
2494 | ||
214e005b | 2495 | static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) |
26b15dad JHS |
2496 | { |
2497 | ||
2498 | switch (c->event) { | |
f60f6b8f | 2499 | case XFRM_MSG_EXPIRE: |
26b15dad | 2500 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2501 | case XFRM_MSG_NEWAE: |
2502 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2503 | case XFRM_MSG_DELSA: |
2504 | case XFRM_MSG_UPDSA: | |
2505 | case XFRM_MSG_NEWSA: | |
26b15dad | 2506 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2507 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2508 | return xfrm_notify_sa_flush(c); |
2509 | default: | |
62db5cfd | 2510 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2511 | c->event); | |
2512 | break; | |
26b15dad JHS |
2513 | } |
2514 | ||
2515 | return 0; | |
2516 | ||
2517 | } | |
2518 | ||
7deb2264 TG |
2519 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2520 | struct xfrm_policy *xp) | |
2521 | { | |
2522 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2523 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2524 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2525 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2526 | + userpolicy_type_attrsize(); | |
2527 | } | |
2528 | ||
1da177e4 LT |
2529 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2530 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2531 | int dir) | |
2532 | { | |
2533 | struct xfrm_user_acquire *ua; | |
2534 | struct nlmsghdr *nlh; | |
1da177e4 LT |
2535 | __u32 seq = xfrm_get_acqseq(); |
2536 | ||
79b8b7f4 TG |
2537 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2538 | if (nlh == NULL) | |
2539 | return -EMSGSIZE; | |
1da177e4 | 2540 | |
7b67c857 | 2541 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2542 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2543 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2544 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2545 | copy_to_user_policy(xp, &ua->policy, dir); | |
2546 | ua->aalgos = xt->aalgos; | |
2547 | ua->ealgos = xt->ealgos; | |
2548 | ua->calgos = xt->calgos; | |
2549 | ua->seq = x->km.seq = seq; | |
2550 | ||
2551 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2552 | goto nlmsg_failure; | |
0d681623 | 2553 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2554 | goto nlmsg_failure; |
1459bb36 | 2555 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2556 | goto nlmsg_failure; |
295fae56 JHS |
2557 | if (xfrm_mark_put(skb, &xp->mark)) |
2558 | goto nla_put_failure; | |
1da177e4 | 2559 | |
9825069d | 2560 | return nlmsg_end(skb, nlh); |
1da177e4 | 2561 | |
295fae56 | 2562 | nla_put_failure: |
1da177e4 | 2563 | nlmsg_failure: |
9825069d TG |
2564 | nlmsg_cancel(skb, nlh); |
2565 | return -EMSGSIZE; | |
1da177e4 LT |
2566 | } |
2567 | ||
2568 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2569 | struct xfrm_policy *xp, int dir) | |
2570 | { | |
a6483b79 | 2571 | struct net *net = xs_net(x); |
1da177e4 | 2572 | struct sk_buff *skb; |
1da177e4 | 2573 | |
7deb2264 | 2574 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2575 | if (skb == NULL) |
2576 | return -ENOMEM; | |
2577 | ||
2578 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2579 | BUG(); | |
2580 | ||
a6483b79 | 2581 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2582 | } |
2583 | ||
2584 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2585 | * or more templates. | |
2586 | */ | |
cb969f07 | 2587 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2588 | u8 *data, int len, int *dir) |
2589 | { | |
fc34acd3 | 2590 | struct net *net = sock_net(sk); |
1da177e4 LT |
2591 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2592 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2593 | struct xfrm_policy *xp; | |
2594 | int nr; | |
2595 | ||
cb969f07 | 2596 | switch (sk->sk_family) { |
1da177e4 LT |
2597 | case AF_INET: |
2598 | if (opt != IP_XFRM_POLICY) { | |
2599 | *dir = -EOPNOTSUPP; | |
2600 | return NULL; | |
2601 | } | |
2602 | break; | |
2603 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2604 | case AF_INET6: | |
2605 | if (opt != IPV6_XFRM_POLICY) { | |
2606 | *dir = -EOPNOTSUPP; | |
2607 | return NULL; | |
2608 | } | |
2609 | break; | |
2610 | #endif | |
2611 | default: | |
2612 | *dir = -EINVAL; | |
2613 | return NULL; | |
2614 | } | |
2615 | ||
2616 | *dir = -EINVAL; | |
2617 | ||
2618 | if (len < sizeof(*p) || | |
2619 | verify_newpolicy_info(p)) | |
2620 | return NULL; | |
2621 | ||
2622 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2623 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2624 | return NULL; |
2625 | ||
a4f1bac6 HX |
2626 | if (p->dir > XFRM_POLICY_OUT) |
2627 | return NULL; | |
2628 | ||
2f09a4d5 | 2629 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2630 | if (xp == NULL) { |
2631 | *dir = -ENOBUFS; | |
2632 | return NULL; | |
2633 | } | |
2634 | ||
2635 | copy_from_user_policy(xp, p); | |
f7b6983f | 2636 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2637 | copy_templates(xp, ut, nr); |
2638 | ||
2639 | *dir = p->dir; | |
2640 | ||
2641 | return xp; | |
2642 | } | |
2643 | ||
7deb2264 TG |
2644 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2645 | { | |
2646 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2647 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2648 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2649 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2650 | + userpolicy_type_attrsize(); |
2651 | } | |
2652 | ||
1da177e4 | 2653 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
214e005b | 2654 | int dir, const struct km_event *c) |
1da177e4 LT |
2655 | { |
2656 | struct xfrm_user_polexpire *upe; | |
2657 | struct nlmsghdr *nlh; | |
d51d081d | 2658 | int hard = c->data.hard; |
1da177e4 | 2659 | |
79b8b7f4 TG |
2660 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2661 | if (nlh == NULL) | |
2662 | return -EMSGSIZE; | |
1da177e4 | 2663 | |
7b67c857 | 2664 | upe = nlmsg_data(nlh); |
1da177e4 LT |
2665 | copy_to_user_policy(xp, &upe->pol, dir); |
2666 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2667 | goto nlmsg_failure; | |
df71837d TJ |
2668 | if (copy_to_user_sec_ctx(xp, skb)) |
2669 | goto nlmsg_failure; | |
1459bb36 | 2670 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2671 | goto nlmsg_failure; |
295fae56 JHS |
2672 | if (xfrm_mark_put(skb, &xp->mark)) |
2673 | goto nla_put_failure; | |
1da177e4 LT |
2674 | upe->hard = !!hard; |
2675 | ||
9825069d | 2676 | return nlmsg_end(skb, nlh); |
1da177e4 | 2677 | |
295fae56 | 2678 | nla_put_failure: |
1da177e4 | 2679 | nlmsg_failure: |
9825069d TG |
2680 | nlmsg_cancel(skb, nlh); |
2681 | return -EMSGSIZE; | |
1da177e4 LT |
2682 | } |
2683 | ||
214e005b | 2684 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
1da177e4 | 2685 | { |
fc34acd3 | 2686 | struct net *net = xp_net(xp); |
1da177e4 | 2687 | struct sk_buff *skb; |
1da177e4 | 2688 | |
7deb2264 | 2689 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2690 | if (skb == NULL) |
2691 | return -ENOMEM; | |
2692 | ||
d51d081d | 2693 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2694 | BUG(); |
2695 | ||
a6483b79 | 2696 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2697 | } |
2698 | ||
214e005b | 2699 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad | 2700 | { |
fc34acd3 | 2701 | struct net *net = xp_net(xp); |
26b15dad | 2702 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2703 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2704 | struct nlmsghdr *nlh; |
2705 | struct sk_buff *skb; | |
7deb2264 | 2706 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2707 | int headlen; |
2708 | ||
2709 | headlen = sizeof(*p); | |
2710 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2711 | len += nla_total_size(headlen); |
0603eac0 HX |
2712 | headlen = sizeof(*id); |
2713 | } | |
cfbfd45a | 2714 | len += userpolicy_type_attrsize(); |
295fae56 | 2715 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2716 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2717 | |
7deb2264 | 2718 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2719 | if (skb == NULL) |
2720 | return -ENOMEM; | |
26b15dad | 2721 | |
79b8b7f4 TG |
2722 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2723 | if (nlh == NULL) | |
2724 | goto nlmsg_failure; | |
26b15dad | 2725 | |
7b67c857 | 2726 | p = nlmsg_data(nlh); |
0603eac0 | 2727 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2728 | struct nlattr *attr; |
2729 | ||
7b67c857 | 2730 | id = nlmsg_data(nlh); |
0603eac0 HX |
2731 | memset(id, 0, sizeof(*id)); |
2732 | id->dir = dir; | |
2733 | if (c->data.byid) | |
2734 | id->index = xp->index; | |
2735 | else | |
2736 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2737 | ||
c0144bea TG |
2738 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
2739 | if (attr == NULL) | |
2740 | goto nlmsg_failure; | |
2741 | ||
2742 | p = nla_data(attr); | |
0603eac0 | 2743 | } |
26b15dad | 2744 | |
26b15dad JHS |
2745 | copy_to_user_policy(xp, p, dir); |
2746 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2747 | goto nlmsg_failure; | |
1459bb36 | 2748 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2749 | goto nlmsg_failure; |
26b15dad | 2750 | |
295fae56 JHS |
2751 | if (xfrm_mark_put(skb, &xp->mark)) |
2752 | goto nla_put_failure; | |
2753 | ||
9825069d | 2754 | nlmsg_end(skb, nlh); |
26b15dad | 2755 | |
a6483b79 | 2756 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2757 | |
295fae56 | 2758 | nla_put_failure: |
26b15dad JHS |
2759 | nlmsg_failure: |
2760 | kfree_skb(skb); | |
2761 | return -1; | |
2762 | } | |
2763 | ||
214e005b | 2764 | static int xfrm_notify_policy_flush(const struct km_event *c) |
26b15dad | 2765 | { |
7067802e | 2766 | struct net *net = c->net; |
26b15dad JHS |
2767 | struct nlmsghdr *nlh; |
2768 | struct sk_buff *skb; | |
26b15dad | 2769 | |
7deb2264 | 2770 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2771 | if (skb == NULL) |
2772 | return -ENOMEM; | |
26b15dad | 2773 | |
79b8b7f4 TG |
2774 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
2775 | if (nlh == NULL) | |
2776 | goto nlmsg_failure; | |
0c51f53c JHS |
2777 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2778 | goto nlmsg_failure; | |
26b15dad | 2779 | |
9825069d | 2780 | nlmsg_end(skb, nlh); |
26b15dad | 2781 | |
a6483b79 | 2782 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2783 | |
2784 | nlmsg_failure: | |
2785 | kfree_skb(skb); | |
2786 | return -1; | |
2787 | } | |
2788 | ||
214e005b | 2789 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) |
26b15dad JHS |
2790 | { |
2791 | ||
2792 | switch (c->event) { | |
f60f6b8f HX |
2793 | case XFRM_MSG_NEWPOLICY: |
2794 | case XFRM_MSG_UPDPOLICY: | |
2795 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2796 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2797 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2798 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2799 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2800 | return xfrm_exp_policy_notify(xp, dir, c); |
2801 | default: | |
62db5cfd | 2802 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2803 | c->event); | |
26b15dad JHS |
2804 | } |
2805 | ||
2806 | return 0; | |
2807 | ||
2808 | } | |
2809 | ||
7deb2264 TG |
2810 | static inline size_t xfrm_report_msgsize(void) |
2811 | { | |
2812 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2813 | } | |
2814 | ||
97a64b45 MN |
2815 | static int build_report(struct sk_buff *skb, u8 proto, |
2816 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2817 | { | |
2818 | struct xfrm_user_report *ur; | |
2819 | struct nlmsghdr *nlh; | |
97a64b45 | 2820 | |
79b8b7f4 TG |
2821 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2822 | if (nlh == NULL) | |
2823 | return -EMSGSIZE; | |
97a64b45 | 2824 | |
7b67c857 | 2825 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2826 | ur->proto = proto; |
2827 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2828 | ||
2829 | if (addr) | |
c0144bea | 2830 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); |
97a64b45 | 2831 | |
9825069d | 2832 | return nlmsg_end(skb, nlh); |
97a64b45 | 2833 | |
c0144bea | 2834 | nla_put_failure: |
9825069d TG |
2835 | nlmsg_cancel(skb, nlh); |
2836 | return -EMSGSIZE; | |
97a64b45 MN |
2837 | } |
2838 | ||
db983c11 AD |
2839 | static int xfrm_send_report(struct net *net, u8 proto, |
2840 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2841 | { |
2842 | struct sk_buff *skb; | |
97a64b45 | 2843 | |
7deb2264 | 2844 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2845 | if (skb == NULL) |
2846 | return -ENOMEM; | |
2847 | ||
2848 | if (build_report(skb, proto, sel, addr) < 0) | |
2849 | BUG(); | |
2850 | ||
a6483b79 | 2851 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2852 | } |
2853 | ||
3a2dfbe8 MW |
2854 | static inline size_t xfrm_mapping_msgsize(void) |
2855 | { | |
2856 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
2857 | } | |
2858 | ||
2859 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
2860 | xfrm_address_t *new_saddr, __be16 new_sport) | |
2861 | { | |
2862 | struct xfrm_user_mapping *um; | |
2863 | struct nlmsghdr *nlh; | |
2864 | ||
2865 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
2866 | if (nlh == NULL) | |
2867 | return -EMSGSIZE; | |
2868 | ||
2869 | um = nlmsg_data(nlh); | |
2870 | ||
2871 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
2872 | um->id.spi = x->id.spi; | |
2873 | um->id.family = x->props.family; | |
2874 | um->id.proto = x->id.proto; | |
2875 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
2876 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
2877 | um->new_sport = new_sport; | |
2878 | um->old_sport = x->encap->encap_sport; | |
2879 | um->reqid = x->props.reqid; | |
2880 | ||
2881 | return nlmsg_end(skb, nlh); | |
2882 | } | |
2883 | ||
2884 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
2885 | __be16 sport) | |
2886 | { | |
a6483b79 | 2887 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
2888 | struct sk_buff *skb; |
2889 | ||
2890 | if (x->id.proto != IPPROTO_ESP) | |
2891 | return -EINVAL; | |
2892 | ||
2893 | if (!x->encap) | |
2894 | return -EINVAL; | |
2895 | ||
2896 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
2897 | if (skb == NULL) | |
2898 | return -ENOMEM; | |
2899 | ||
2900 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
2901 | BUG(); | |
2902 | ||
a6483b79 | 2903 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
3a2dfbe8 MW |
2904 | } |
2905 | ||
1da177e4 LT |
2906 | static struct xfrm_mgr netlink_mgr = { |
2907 | .id = "netlink", | |
2908 | .notify = xfrm_send_state_notify, | |
2909 | .acquire = xfrm_send_acquire, | |
2910 | .compile_policy = xfrm_compile_policy, | |
2911 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2912 | .report = xfrm_send_report, |
5c79de6e | 2913 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 2914 | .new_mapping = xfrm_send_mapping, |
1da177e4 LT |
2915 | }; |
2916 | ||
a6483b79 | 2917 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 2918 | { |
be33690d PM |
2919 | struct sock *nlsk; |
2920 | ||
a6483b79 | 2921 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2922 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2923 | if (nlsk == NULL) |
1da177e4 | 2924 | return -ENOMEM; |
d79d792e | 2925 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
a6483b79 | 2926 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
2927 | return 0; |
2928 | } | |
2929 | ||
d79d792e | 2930 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 2931 | { |
d79d792e EB |
2932 | struct net *net; |
2933 | list_for_each_entry(net, net_exit_list, exit_list) | |
2934 | rcu_assign_pointer(net->xfrm.nlsk, NULL); | |
2935 | synchronize_net(); | |
2936 | list_for_each_entry(net, net_exit_list, exit_list) | |
2937 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
2938 | } |
2939 | ||
a6483b79 | 2940 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
2941 | .init = xfrm_user_net_init, |
2942 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
2943 | }; |
2944 | ||
2945 | static int __init xfrm_user_init(void) | |
2946 | { | |
2947 | int rv; | |
2948 | ||
2949 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
2950 | ||
2951 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
2952 | if (rv < 0) | |
2953 | return rv; | |
2954 | rv = xfrm_register_km(&netlink_mgr); | |
2955 | if (rv < 0) | |
2956 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2957 | return rv; | |
2958 | } | |
2959 | ||
2960 | static void __exit xfrm_user_exit(void) | |
2961 | { | |
2962 | xfrm_unregister_km(&netlink_mgr); | |
2963 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2964 | } | |
2965 | ||
1da177e4 LT |
2966 | module_init(xfrm_user_init); |
2967 | module_exit(xfrm_user_exit); | |
2968 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2969 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2970 |