]>
Commit | Line | Data |
---|---|---|
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 | ||
122 | ||
1da177e4 | 123 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 124 | struct nlattr **attrs) |
1da177e4 LT |
125 | { |
126 | int err; | |
127 | ||
128 | err = -EINVAL; | |
129 | switch (p->family) { | |
130 | case AF_INET: | |
131 | break; | |
132 | ||
133 | case AF_INET6: | |
134 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
135 | break; | |
136 | #else | |
137 | err = -EAFNOSUPPORT; | |
138 | goto out; | |
139 | #endif | |
140 | ||
141 | default: | |
142 | goto out; | |
3ff50b79 | 143 | } |
1da177e4 LT |
144 | |
145 | err = -EINVAL; | |
146 | switch (p->id.proto) { | |
147 | case IPPROTO_AH: | |
4447bb33 MW |
148 | if ((!attrs[XFRMA_ALG_AUTH] && |
149 | !attrs[XFRMA_ALG_AUTH_TRUNC]) || | |
1a6509d9 | 150 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 151 | attrs[XFRMA_ALG_CRYPT] || |
35d2856b MW |
152 | attrs[XFRMA_ALG_COMP] || |
153 | attrs[XFRMA_TFCPAD]) | |
1da177e4 LT |
154 | goto out; |
155 | break; | |
156 | ||
157 | case IPPROTO_ESP: | |
1a6509d9 HX |
158 | if (attrs[XFRMA_ALG_COMP]) |
159 | goto out; | |
160 | if (!attrs[XFRMA_ALG_AUTH] && | |
4447bb33 | 161 | !attrs[XFRMA_ALG_AUTH_TRUNC] && |
1a6509d9 HX |
162 | !attrs[XFRMA_ALG_CRYPT] && |
163 | !attrs[XFRMA_ALG_AEAD]) | |
164 | goto out; | |
165 | if ((attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 166 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 HX |
167 | attrs[XFRMA_ALG_CRYPT]) && |
168 | attrs[XFRMA_ALG_AEAD]) | |
1da177e4 | 169 | goto out; |
35d2856b MW |
170 | if (attrs[XFRMA_TFCPAD] && |
171 | p->mode != XFRM_MODE_TUNNEL) | |
172 | goto out; | |
1da177e4 LT |
173 | break; |
174 | ||
175 | case IPPROTO_COMP: | |
35a7aa08 | 176 | if (!attrs[XFRMA_ALG_COMP] || |
1a6509d9 | 177 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 | 178 | attrs[XFRMA_ALG_AUTH] || |
4447bb33 | 179 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
35d2856b MW |
180 | attrs[XFRMA_ALG_CRYPT] || |
181 | attrs[XFRMA_TFCPAD]) | |
1da177e4 LT |
182 | goto out; |
183 | break; | |
184 | ||
e23c7194 MN |
185 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
186 | case IPPROTO_DSTOPTS: | |
187 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
188 | if (attrs[XFRMA_ALG_COMP] || |
189 | attrs[XFRMA_ALG_AUTH] || | |
4447bb33 | 190 | attrs[XFRMA_ALG_AUTH_TRUNC] || |
1a6509d9 | 191 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
192 | attrs[XFRMA_ALG_CRYPT] || |
193 | attrs[XFRMA_ENCAP] || | |
194 | attrs[XFRMA_SEC_CTX] || | |
35d2856b | 195 | attrs[XFRMA_TFCPAD] || |
35a7aa08 | 196 | !attrs[XFRMA_COADDR]) |
e23c7194 MN |
197 | goto out; |
198 | break; | |
199 | #endif | |
200 | ||
1da177e4 LT |
201 | default: |
202 | goto out; | |
3ff50b79 | 203 | } |
1da177e4 | 204 | |
1a6509d9 HX |
205 | if ((err = verify_aead(attrs))) |
206 | goto out; | |
4447bb33 MW |
207 | if ((err = verify_auth_trunc(attrs))) |
208 | goto out; | |
35a7aa08 | 209 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 210 | goto out; |
35a7aa08 | 211 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 212 | goto out; |
35a7aa08 | 213 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 214 | goto out; |
35a7aa08 | 215 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 216 | goto out; |
1da177e4 LT |
217 | |
218 | err = -EINVAL; | |
219 | switch (p->mode) { | |
7e49e6de MN |
220 | case XFRM_MODE_TRANSPORT: |
221 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 222 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 223 | case XFRM_MODE_BEET: |
1da177e4 LT |
224 | break; |
225 | ||
226 | default: | |
227 | goto out; | |
3ff50b79 | 228 | } |
1da177e4 LT |
229 | |
230 | err = 0; | |
231 | ||
232 | out: | |
233 | return err; | |
234 | } | |
235 | ||
236 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
237 | struct xfrm_algo_desc *(*get_byname)(char *, int), | |
5424f32e | 238 | struct nlattr *rta) |
1da177e4 | 239 | { |
1da177e4 LT |
240 | struct xfrm_algo *p, *ualg; |
241 | struct xfrm_algo_desc *algo; | |
242 | ||
243 | if (!rta) | |
244 | return 0; | |
245 | ||
5424f32e | 246 | ualg = nla_data(rta); |
1da177e4 LT |
247 | |
248 | algo = get_byname(ualg->alg_name, 1); | |
249 | if (!algo) | |
250 | return -ENOSYS; | |
251 | *props = algo->desc.sadb_alg_id; | |
252 | ||
0f99be0d | 253 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
254 | if (!p) |
255 | return -ENOMEM; | |
256 | ||
04ff1260 | 257 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
258 | *algpp = p; |
259 | return 0; | |
260 | } | |
261 | ||
4447bb33 MW |
262 | static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, |
263 | struct nlattr *rta) | |
264 | { | |
265 | struct xfrm_algo *ualg; | |
266 | struct xfrm_algo_auth *p; | |
267 | struct xfrm_algo_desc *algo; | |
268 | ||
269 | if (!rta) | |
270 | return 0; | |
271 | ||
272 | ualg = nla_data(rta); | |
273 | ||
274 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
275 | if (!algo) | |
276 | return -ENOSYS; | |
277 | *props = algo->desc.sadb_alg_id; | |
278 | ||
279 | p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); | |
280 | if (!p) | |
281 | return -ENOMEM; | |
282 | ||
283 | strcpy(p->alg_name, algo->name); | |
284 | p->alg_key_len = ualg->alg_key_len; | |
285 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
286 | memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); | |
287 | ||
288 | *algpp = p; | |
289 | return 0; | |
290 | } | |
291 | ||
292 | static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, | |
293 | struct nlattr *rta) | |
294 | { | |
295 | struct xfrm_algo_auth *p, *ualg; | |
296 | struct xfrm_algo_desc *algo; | |
297 | ||
298 | if (!rta) | |
299 | return 0; | |
300 | ||
301 | ualg = nla_data(rta); | |
302 | ||
303 | algo = xfrm_aalg_get_byname(ualg->alg_name, 1); | |
304 | if (!algo) | |
305 | return -ENOSYS; | |
fa6dd8a2 ND |
306 | if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN || |
307 | ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) | |
4447bb33 MW |
308 | return -EINVAL; |
309 | *props = algo->desc.sadb_alg_id; | |
310 | ||
311 | p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); | |
312 | if (!p) | |
313 | return -ENOMEM; | |
314 | ||
315 | strcpy(p->alg_name, algo->name); | |
316 | if (!p->alg_trunc_len) | |
317 | p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; | |
318 | ||
319 | *algpp = p; | |
320 | return 0; | |
321 | } | |
322 | ||
1a6509d9 HX |
323 | static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, |
324 | struct nlattr *rta) | |
325 | { | |
326 | struct xfrm_algo_aead *p, *ualg; | |
327 | struct xfrm_algo_desc *algo; | |
328 | ||
329 | if (!rta) | |
330 | return 0; | |
331 | ||
332 | ualg = nla_data(rta); | |
333 | ||
334 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); | |
335 | if (!algo) | |
336 | return -ENOSYS; | |
337 | *props = algo->desc.sadb_alg_id; | |
338 | ||
339 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); | |
340 | if (!p) | |
341 | return -ENOMEM; | |
342 | ||
343 | strcpy(p->alg_name, algo->name); | |
344 | *algpp = p; | |
345 | return 0; | |
346 | } | |
347 | ||
661697f7 | 348 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 349 | { |
df71837d TJ |
350 | int len = 0; |
351 | ||
352 | if (xfrm_ctx) { | |
353 | len += sizeof(struct xfrm_user_sec_ctx); | |
354 | len += xfrm_ctx->ctx_len; | |
355 | } | |
356 | return len; | |
357 | } | |
358 | ||
1da177e4 LT |
359 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
360 | { | |
361 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
362 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
363 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
364 | x->props.mode = p->mode; | |
365 | x->props.replay_window = p->replay_window; | |
366 | x->props.reqid = p->reqid; | |
367 | x->props.family = p->family; | |
54489c14 | 368 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 369 | x->props.flags = p->flags; |
196b0036 | 370 | |
ccf9b3b8 | 371 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
196b0036 | 372 | x->sel.family = p->family; |
1da177e4 LT |
373 | } |
374 | ||
d51d081d JHS |
375 | /* |
376 | * someday when pfkey also has support, we could have the code | |
377 | * somehow made shareable and move it to xfrm_state.c - JHS | |
378 | * | |
379 | */ | |
5424f32e | 380 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) |
d51d081d | 381 | { |
5424f32e TG |
382 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
383 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
384 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
385 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d JHS |
386 | |
387 | if (rp) { | |
388 | struct xfrm_replay_state *replay; | |
5424f32e | 389 | replay = nla_data(rp); |
d51d081d JHS |
390 | memcpy(&x->replay, replay, sizeof(*replay)); |
391 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
392 | } | |
393 | ||
394 | if (lt) { | |
395 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 396 | ltime = nla_data(lt); |
d51d081d JHS |
397 | x->curlft.bytes = ltime->bytes; |
398 | x->curlft.packets = ltime->packets; | |
399 | x->curlft.add_time = ltime->add_time; | |
400 | x->curlft.use_time = ltime->use_time; | |
401 | } | |
402 | ||
cf5cb79f | 403 | if (et) |
5424f32e | 404 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 405 | |
cf5cb79f | 406 | if (rt) |
5424f32e | 407 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
408 | } |
409 | ||
fc34acd3 AD |
410 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
411 | struct xfrm_usersa_info *p, | |
5424f32e | 412 | struct nlattr **attrs, |
1da177e4 LT |
413 | int *errp) |
414 | { | |
fc34acd3 | 415 | struct xfrm_state *x = xfrm_state_alloc(net); |
1da177e4 LT |
416 | int err = -ENOMEM; |
417 | ||
418 | if (!x) | |
419 | goto error_no_put; | |
420 | ||
421 | copy_from_user_state(x, p); | |
422 | ||
1a6509d9 HX |
423 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
424 | attrs[XFRMA_ALG_AEAD]))) | |
425 | goto error; | |
4447bb33 MW |
426 | if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, |
427 | attrs[XFRMA_ALG_AUTH_TRUNC]))) | |
1da177e4 | 428 | goto error; |
4447bb33 MW |
429 | if (!x->props.aalgo) { |
430 | if ((err = attach_auth(&x->aalg, &x->props.aalgo, | |
431 | attrs[XFRMA_ALG_AUTH]))) | |
432 | goto error; | |
433 | } | |
1da177e4 LT |
434 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, |
435 | xfrm_ealg_get_byname, | |
35a7aa08 | 436 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
437 | goto error; |
438 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
439 | xfrm_calg_get_byname, | |
35a7aa08 | 440 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 441 | goto error; |
fd21150a TG |
442 | |
443 | if (attrs[XFRMA_ENCAP]) { | |
444 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
445 | sizeof(*x->encap), GFP_KERNEL); | |
446 | if (x->encap == NULL) | |
447 | goto error; | |
448 | } | |
449 | ||
35d2856b MW |
450 | if (attrs[XFRMA_TFCPAD]) |
451 | x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); | |
452 | ||
fd21150a TG |
453 | if (attrs[XFRMA_COADDR]) { |
454 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
455 | sizeof(*x->coaddr), GFP_KERNEL); | |
456 | if (x->coaddr == NULL) | |
457 | goto error; | |
458 | } | |
459 | ||
6f26b61e JHS |
460 | xfrm_mark_get(attrs, &x->mark); |
461 | ||
72cb6962 | 462 | err = xfrm_init_state(x); |
1da177e4 LT |
463 | if (err) |
464 | goto error; | |
465 | ||
fd21150a TG |
466 | if (attrs[XFRMA_SEC_CTX] && |
467 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
468 | goto error; |
469 | ||
1da177e4 | 470 | x->km.seq = p->seq; |
b27aeadb | 471 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
d51d081d | 472 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
b27aeadb | 473 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
d51d081d JHS |
474 | x->preplay.bitmap = 0; |
475 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; | |
476 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; | |
477 | ||
478 | /* override default values from above */ | |
479 | ||
5424f32e | 480 | xfrm_update_ae_params(x, attrs); |
1da177e4 LT |
481 | |
482 | return x; | |
483 | ||
484 | error: | |
485 | x->km.state = XFRM_STATE_DEAD; | |
486 | xfrm_state_put(x); | |
487 | error_no_put: | |
488 | *errp = err; | |
489 | return NULL; | |
490 | } | |
491 | ||
22e70050 | 492 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 493 | struct nlattr **attrs) |
1da177e4 | 494 | { |
fc34acd3 | 495 | struct net *net = sock_net(skb->sk); |
7b67c857 | 496 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
497 | struct xfrm_state *x; |
498 | int err; | |
26b15dad | 499 | struct km_event c; |
2532386f EP |
500 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
501 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
502 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 | 503 | |
35a7aa08 | 504 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
505 | if (err) |
506 | return err; | |
507 | ||
fc34acd3 | 508 | x = xfrm_state_construct(net, p, attrs, &err); |
1da177e4 LT |
509 | if (!x) |
510 | return err; | |
511 | ||
26b15dad | 512 | xfrm_state_hold(x); |
1da177e4 LT |
513 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
514 | err = xfrm_state_add(x); | |
515 | else | |
516 | err = xfrm_state_update(x); | |
517 | ||
2532386f | 518 | xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 519 | |
1da177e4 LT |
520 | if (err < 0) { |
521 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 522 | __xfrm_state_put(x); |
7d6dfe1f | 523 | goto out; |
1da177e4 LT |
524 | } |
525 | ||
26b15dad JHS |
526 | c.seq = nlh->nlmsg_seq; |
527 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 528 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
529 | |
530 | km_state_notify(x, &c); | |
7d6dfe1f | 531 | out: |
26b15dad | 532 | xfrm_state_put(x); |
1da177e4 LT |
533 | return err; |
534 | } | |
535 | ||
fc34acd3 AD |
536 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
537 | struct xfrm_usersa_id *p, | |
5424f32e | 538 | struct nlattr **attrs, |
eb2971b6 MN |
539 | int *errp) |
540 | { | |
541 | struct xfrm_state *x = NULL; | |
6f26b61e | 542 | struct xfrm_mark m; |
eb2971b6 | 543 | int err; |
6f26b61e | 544 | u32 mark = xfrm_mark_get(attrs, &m); |
eb2971b6 MN |
545 | |
546 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
547 | err = -ESRCH; | |
6f26b61e | 548 | x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); |
eb2971b6 MN |
549 | } else { |
550 | xfrm_address_t *saddr = NULL; | |
551 | ||
35a7aa08 | 552 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
553 | if (!saddr) { |
554 | err = -EINVAL; | |
555 | goto out; | |
556 | } | |
557 | ||
9abbffee | 558 | err = -ESRCH; |
6f26b61e JHS |
559 | x = xfrm_state_lookup_byaddr(net, mark, |
560 | &p->daddr, saddr, | |
221df1ed | 561 | p->proto, p->family); |
eb2971b6 MN |
562 | } |
563 | ||
564 | out: | |
565 | if (!x && errp) | |
566 | *errp = err; | |
567 | return x; | |
568 | } | |
569 | ||
22e70050 | 570 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 571 | struct nlattr **attrs) |
1da177e4 | 572 | { |
fc34acd3 | 573 | struct net *net = sock_net(skb->sk); |
1da177e4 | 574 | struct xfrm_state *x; |
eb2971b6 | 575 | int err = -ESRCH; |
26b15dad | 576 | struct km_event c; |
7b67c857 | 577 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
2532386f EP |
578 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
579 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
580 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 | 581 | |
fc34acd3 | 582 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 | 583 | if (x == NULL) |
eb2971b6 | 584 | return err; |
1da177e4 | 585 | |
6f68dc37 | 586 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
587 | goto out; |
588 | ||
1da177e4 | 589 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
590 | err = -EPERM; |
591 | goto out; | |
1da177e4 LT |
592 | } |
593 | ||
26b15dad | 594 | err = xfrm_state_delete(x); |
161a09e7 | 595 | |
c8c05a8e CZ |
596 | if (err < 0) |
597 | goto out; | |
26b15dad JHS |
598 | |
599 | c.seq = nlh->nlmsg_seq; | |
600 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 601 | c.event = nlh->nlmsg_type; |
26b15dad | 602 | km_state_notify(x, &c); |
1da177e4 | 603 | |
c8c05a8e | 604 | out: |
2532386f | 605 | xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid); |
c8c05a8e | 606 | xfrm_state_put(x); |
26b15dad | 607 | return err; |
1da177e4 LT |
608 | } |
609 | ||
610 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
611 | { | |
612 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
613 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
614 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
615 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
616 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 617 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
618 | p->mode = x->props.mode; |
619 | p->replay_window = x->props.replay_window; | |
620 | p->reqid = x->props.reqid; | |
621 | p->family = x->props.family; | |
622 | p->flags = x->props.flags; | |
623 | p->seq = x->km.seq; | |
624 | } | |
625 | ||
626 | struct xfrm_dump_info { | |
627 | struct sk_buff *in_skb; | |
628 | struct sk_buff *out_skb; | |
629 | u32 nlmsg_seq; | |
630 | u16 nlmsg_flags; | |
1da177e4 LT |
631 | }; |
632 | ||
c0144bea TG |
633 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
634 | { | |
c0144bea TG |
635 | struct xfrm_user_sec_ctx *uctx; |
636 | struct nlattr *attr; | |
68325d3b | 637 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
638 | |
639 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
640 | if (attr == NULL) | |
641 | return -EMSGSIZE; | |
642 | ||
643 | uctx = nla_data(attr); | |
644 | uctx->exttype = XFRMA_SEC_CTX; | |
645 | uctx->len = ctx_size; | |
646 | uctx->ctx_doi = s->ctx_doi; | |
647 | uctx->ctx_alg = s->ctx_alg; | |
648 | uctx->ctx_len = s->ctx_len; | |
649 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
4447bb33 MW |
654 | static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) |
655 | { | |
656 | struct xfrm_algo *algo; | |
657 | struct nlattr *nla; | |
658 | ||
659 | nla = nla_reserve(skb, XFRMA_ALG_AUTH, | |
660 | sizeof(*algo) + (auth->alg_key_len + 7) / 8); | |
661 | if (!nla) | |
662 | return -EMSGSIZE; | |
663 | ||
664 | algo = nla_data(nla); | |
665 | strcpy(algo->alg_name, auth->alg_name); | |
666 | memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); | |
667 | algo->alg_key_len = auth->alg_key_len; | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
68325d3b HX |
672 | /* Don't change this without updating xfrm_sa_len! */ |
673 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
674 | struct xfrm_usersa_info *p, | |
675 | struct sk_buff *skb) | |
1da177e4 | 676 | { |
1da177e4 LT |
677 | copy_to_user_state(x, p); |
678 | ||
050f009e HX |
679 | if (x->coaddr) |
680 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
681 | ||
682 | if (x->lastused) | |
683 | NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); | |
050f009e | 684 | |
1a6509d9 HX |
685 | if (x->aead) |
686 | NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
4447bb33 MW |
687 | if (x->aalg) { |
688 | if (copy_to_user_auth(x->aalg, skb)) | |
689 | goto nla_put_failure; | |
690 | ||
691 | NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC, | |
692 | xfrm_alg_auth_len(x->aalg), x->aalg); | |
693 | } | |
1da177e4 | 694 | if (x->ealg) |
0f99be0d | 695 | NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); |
1da177e4 | 696 | if (x->calg) |
c0144bea | 697 | NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
1da177e4 LT |
698 | |
699 | if (x->encap) | |
c0144bea | 700 | NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
1da177e4 | 701 | |
35d2856b MW |
702 | if (x->tfcpad) |
703 | NLA_PUT_U32(skb, XFRMA_TFCPAD, x->tfcpad); | |
704 | ||
6f26b61e JHS |
705 | if (xfrm_mark_put(skb, &x->mark)) |
706 | goto nla_put_failure; | |
707 | ||
c0144bea TG |
708 | if (x->security && copy_sec_ctx(x->security, skb) < 0) |
709 | goto nla_put_failure; | |
060f02a3 | 710 | |
68325d3b HX |
711 | return 0; |
712 | ||
713 | nla_put_failure: | |
714 | return -EMSGSIZE; | |
715 | } | |
716 | ||
717 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
718 | { | |
719 | struct xfrm_dump_info *sp = ptr; | |
720 | struct sk_buff *in_skb = sp->in_skb; | |
721 | struct sk_buff *skb = sp->out_skb; | |
722 | struct xfrm_usersa_info *p; | |
723 | struct nlmsghdr *nlh; | |
724 | int err; | |
725 | ||
68325d3b HX |
726 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
727 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
728 | if (nlh == NULL) | |
729 | return -EMSGSIZE; | |
730 | ||
731 | p = nlmsg_data(nlh); | |
732 | ||
733 | err = copy_to_user_state_extra(x, p, skb); | |
734 | if (err) | |
735 | goto nla_put_failure; | |
736 | ||
9825069d | 737 | nlmsg_end(skb, nlh); |
1da177e4 LT |
738 | return 0; |
739 | ||
c0144bea | 740 | nla_put_failure: |
9825069d | 741 | nlmsg_cancel(skb, nlh); |
68325d3b | 742 | return err; |
1da177e4 LT |
743 | } |
744 | ||
4c563f76 TT |
745 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
746 | { | |
747 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
748 | xfrm_state_walk_done(walk); | |
749 | return 0; | |
750 | } | |
751 | ||
1da177e4 LT |
752 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
753 | { | |
fc34acd3 | 754 | struct net *net = sock_net(skb->sk); |
4c563f76 | 755 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
756 | struct xfrm_dump_info info; |
757 | ||
4c563f76 TT |
758 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
759 | sizeof(cb->args) - sizeof(cb->args[0])); | |
760 | ||
1da177e4 LT |
761 | info.in_skb = cb->skb; |
762 | info.out_skb = skb; | |
763 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
764 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
765 | |
766 | if (!cb->args[0]) { | |
767 | cb->args[0] = 1; | |
768 | xfrm_state_walk_init(walk, 0); | |
769 | } | |
770 | ||
fc34acd3 | 771 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
772 | |
773 | return skb->len; | |
774 | } | |
775 | ||
776 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
777 | struct xfrm_state *x, u32 seq) | |
778 | { | |
779 | struct xfrm_dump_info info; | |
780 | struct sk_buff *skb; | |
781 | ||
7deb2264 | 782 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
783 | if (!skb) |
784 | return ERR_PTR(-ENOMEM); | |
785 | ||
1da177e4 LT |
786 | info.in_skb = in_skb; |
787 | info.out_skb = skb; | |
788 | info.nlmsg_seq = seq; | |
789 | info.nlmsg_flags = 0; | |
1da177e4 LT |
790 | |
791 | if (dump_one_state(x, 0, &info)) { | |
792 | kfree_skb(skb); | |
793 | return NULL; | |
794 | } | |
795 | ||
796 | return skb; | |
797 | } | |
798 | ||
7deb2264 TG |
799 | static inline size_t xfrm_spdinfo_msgsize(void) |
800 | { | |
801 | return NLMSG_ALIGN(4) | |
802 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
803 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
804 | } | |
805 | ||
e071041b AD |
806 | static int build_spdinfo(struct sk_buff *skb, struct net *net, |
807 | u32 pid, u32 seq, u32 flags) | |
ecfd6b18 | 808 | { |
5a6d3416 JHS |
809 | struct xfrmk_spdinfo si; |
810 | struct xfrmu_spdinfo spc; | |
811 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 JHS |
812 | struct nlmsghdr *nlh; |
813 | u32 *f; | |
814 | ||
815 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
816 | if (nlh == NULL) /* shouldnt really happen ... */ | |
817 | return -EMSGSIZE; | |
818 | ||
819 | f = nlmsg_data(nlh); | |
820 | *f = flags; | |
e071041b | 821 | xfrm_spd_getinfo(net, &si); |
5a6d3416 JHS |
822 | spc.incnt = si.incnt; |
823 | spc.outcnt = si.outcnt; | |
824 | spc.fwdcnt = si.fwdcnt; | |
825 | spc.inscnt = si.inscnt; | |
826 | spc.outscnt = si.outscnt; | |
827 | spc.fwdscnt = si.fwdscnt; | |
828 | sph.spdhcnt = si.spdhcnt; | |
829 | sph.spdhmcnt = si.spdhmcnt; | |
830 | ||
831 | NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); | |
832 | NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
ecfd6b18 JHS |
833 | |
834 | return nlmsg_end(skb, nlh); | |
835 | ||
836 | nla_put_failure: | |
837 | nlmsg_cancel(skb, nlh); | |
838 | return -EMSGSIZE; | |
839 | } | |
840 | ||
841 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 842 | struct nlattr **attrs) |
ecfd6b18 | 843 | { |
a6483b79 | 844 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 845 | struct sk_buff *r_skb; |
7b67c857 | 846 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
847 | u32 spid = NETLINK_CB(skb).pid; |
848 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 849 | |
7deb2264 | 850 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
851 | if (r_skb == NULL) |
852 | return -ENOMEM; | |
853 | ||
e071041b | 854 | if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0) |
ecfd6b18 JHS |
855 | BUG(); |
856 | ||
a6483b79 | 857 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
ecfd6b18 JHS |
858 | } |
859 | ||
7deb2264 TG |
860 | static inline size_t xfrm_sadinfo_msgsize(void) |
861 | { | |
862 | return NLMSG_ALIGN(4) | |
863 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
864 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
865 | } | |
866 | ||
e071041b AD |
867 | static int build_sadinfo(struct sk_buff *skb, struct net *net, |
868 | u32 pid, u32 seq, u32 flags) | |
28d8909b | 869 | { |
af11e316 JHS |
870 | struct xfrmk_sadinfo si; |
871 | struct xfrmu_sadhinfo sh; | |
28d8909b JHS |
872 | struct nlmsghdr *nlh; |
873 | u32 *f; | |
874 | ||
875 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
876 | if (nlh == NULL) /* shouldnt really happen ... */ | |
877 | return -EMSGSIZE; | |
878 | ||
879 | f = nlmsg_data(nlh); | |
880 | *f = flags; | |
e071041b | 881 | xfrm_sad_getinfo(net, &si); |
28d8909b | 882 | |
af11e316 JHS |
883 | sh.sadhmcnt = si.sadhmcnt; |
884 | sh.sadhcnt = si.sadhcnt; | |
885 | ||
886 | NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); | |
887 | NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
28d8909b JHS |
888 | |
889 | return nlmsg_end(skb, nlh); | |
890 | ||
891 | nla_put_failure: | |
892 | nlmsg_cancel(skb, nlh); | |
893 | return -EMSGSIZE; | |
894 | } | |
895 | ||
896 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 897 | struct nlattr **attrs) |
28d8909b | 898 | { |
a6483b79 | 899 | struct net *net = sock_net(skb->sk); |
28d8909b | 900 | struct sk_buff *r_skb; |
7b67c857 | 901 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
902 | u32 spid = NETLINK_CB(skb).pid; |
903 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 904 | |
7deb2264 | 905 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
906 | if (r_skb == NULL) |
907 | return -ENOMEM; | |
908 | ||
e071041b | 909 | if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0) |
28d8909b JHS |
910 | BUG(); |
911 | ||
a6483b79 | 912 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
28d8909b JHS |
913 | } |
914 | ||
22e70050 | 915 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 916 | struct nlattr **attrs) |
1da177e4 | 917 | { |
fc34acd3 | 918 | struct net *net = sock_net(skb->sk); |
7b67c857 | 919 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
920 | struct xfrm_state *x; |
921 | struct sk_buff *resp_skb; | |
eb2971b6 | 922 | int err = -ESRCH; |
1da177e4 | 923 | |
fc34acd3 | 924 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
925 | if (x == NULL) |
926 | goto out_noput; | |
927 | ||
928 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
929 | if (IS_ERR(resp_skb)) { | |
930 | err = PTR_ERR(resp_skb); | |
931 | } else { | |
a6483b79 | 932 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
933 | } |
934 | xfrm_state_put(x); | |
935 | out_noput: | |
936 | return err; | |
937 | } | |
938 | ||
939 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
940 | { | |
941 | switch (p->info.id.proto) { | |
942 | case IPPROTO_AH: | |
943 | case IPPROTO_ESP: | |
944 | break; | |
945 | ||
946 | case IPPROTO_COMP: | |
947 | /* IPCOMP spi is 16-bits. */ | |
948 | if (p->max >= 0x10000) | |
949 | return -EINVAL; | |
950 | break; | |
951 | ||
952 | default: | |
953 | return -EINVAL; | |
3ff50b79 | 954 | } |
1da177e4 LT |
955 | |
956 | if (p->min > p->max) | |
957 | return -EINVAL; | |
958 | ||
959 | return 0; | |
960 | } | |
961 | ||
22e70050 | 962 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 963 | struct nlattr **attrs) |
1da177e4 | 964 | { |
fc34acd3 | 965 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
966 | struct xfrm_state *x; |
967 | struct xfrm_userspi_info *p; | |
968 | struct sk_buff *resp_skb; | |
969 | xfrm_address_t *daddr; | |
970 | int family; | |
971 | int err; | |
6f26b61e JHS |
972 | u32 mark; |
973 | struct xfrm_mark m; | |
1da177e4 | 974 | |
7b67c857 | 975 | p = nlmsg_data(nlh); |
1da177e4 LT |
976 | err = verify_userspi_info(p); |
977 | if (err) | |
978 | goto out_noput; | |
979 | ||
980 | family = p->info.family; | |
981 | daddr = &p->info.id.daddr; | |
982 | ||
983 | x = NULL; | |
6f26b61e JHS |
984 | |
985 | mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 986 | if (p->info.seq) { |
6f26b61e | 987 | x = xfrm_find_acq_byseq(net, mark, p->info.seq); |
1da177e4 LT |
988 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { |
989 | xfrm_state_put(x); | |
990 | x = NULL; | |
991 | } | |
992 | } | |
993 | ||
994 | if (!x) | |
6f26b61e | 995 | x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, |
1da177e4 LT |
996 | p->info.id.proto, daddr, |
997 | &p->info.saddr, 1, | |
998 | family); | |
999 | err = -ENOENT; | |
1000 | if (x == NULL) | |
1001 | goto out_noput; | |
1002 | ||
658b219e HX |
1003 | err = xfrm_alloc_spi(x, p->min, p->max); |
1004 | if (err) | |
1005 | goto out; | |
1da177e4 | 1006 | |
658b219e | 1007 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
1008 | if (IS_ERR(resp_skb)) { |
1009 | err = PTR_ERR(resp_skb); | |
1010 | goto out; | |
1011 | } | |
1012 | ||
a6483b79 | 1013 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
1014 | |
1015 | out: | |
1016 | xfrm_state_put(x); | |
1017 | out_noput: | |
1018 | return err; | |
1019 | } | |
1020 | ||
b798a9ed | 1021 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
1022 | { |
1023 | switch (dir) { | |
1024 | case XFRM_POLICY_IN: | |
1025 | case XFRM_POLICY_OUT: | |
1026 | case XFRM_POLICY_FWD: | |
1027 | break; | |
1028 | ||
1029 | default: | |
1030 | return -EINVAL; | |
3ff50b79 | 1031 | } |
1da177e4 LT |
1032 | |
1033 | return 0; | |
1034 | } | |
1035 | ||
b798a9ed | 1036 | static int verify_policy_type(u8 type) |
f7b6983f MN |
1037 | { |
1038 | switch (type) { | |
1039 | case XFRM_POLICY_TYPE_MAIN: | |
1040 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1041 | case XFRM_POLICY_TYPE_SUB: | |
1042 | #endif | |
1043 | break; | |
1044 | ||
1045 | default: | |
1046 | return -EINVAL; | |
3ff50b79 | 1047 | } |
f7b6983f MN |
1048 | |
1049 | return 0; | |
1050 | } | |
1051 | ||
1da177e4 LT |
1052 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
1053 | { | |
1054 | switch (p->share) { | |
1055 | case XFRM_SHARE_ANY: | |
1056 | case XFRM_SHARE_SESSION: | |
1057 | case XFRM_SHARE_USER: | |
1058 | case XFRM_SHARE_UNIQUE: | |
1059 | break; | |
1060 | ||
1061 | default: | |
1062 | return -EINVAL; | |
3ff50b79 | 1063 | } |
1da177e4 LT |
1064 | |
1065 | switch (p->action) { | |
1066 | case XFRM_POLICY_ALLOW: | |
1067 | case XFRM_POLICY_BLOCK: | |
1068 | break; | |
1069 | ||
1070 | default: | |
1071 | return -EINVAL; | |
3ff50b79 | 1072 | } |
1da177e4 LT |
1073 | |
1074 | switch (p->sel.family) { | |
1075 | case AF_INET: | |
1076 | break; | |
1077 | ||
1078 | case AF_INET6: | |
1079 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1080 | break; | |
1081 | #else | |
1082 | return -EAFNOSUPPORT; | |
1083 | #endif | |
1084 | ||
1085 | default: | |
1086 | return -EINVAL; | |
3ff50b79 | 1087 | } |
1da177e4 LT |
1088 | |
1089 | return verify_policy_dir(p->dir); | |
1090 | } | |
1091 | ||
5424f32e | 1092 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 1093 | { |
5424f32e | 1094 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1095 | struct xfrm_user_sec_ctx *uctx; |
1096 | ||
1097 | if (!rt) | |
1098 | return 0; | |
1099 | ||
5424f32e | 1100 | uctx = nla_data(rt); |
03e1ad7b | 1101 | return security_xfrm_policy_alloc(&pol->security, uctx); |
df71837d TJ |
1102 | } |
1103 | ||
1da177e4 LT |
1104 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
1105 | int nr) | |
1106 | { | |
1107 | int i; | |
1108 | ||
1109 | xp->xfrm_nr = nr; | |
1110 | for (i = 0; i < nr; i++, ut++) { | |
1111 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1112 | ||
1113 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
1114 | memcpy(&t->saddr, &ut->saddr, | |
1115 | sizeof(xfrm_address_t)); | |
1116 | t->reqid = ut->reqid; | |
1117 | t->mode = ut->mode; | |
1118 | t->share = ut->share; | |
1119 | t->optional = ut->optional; | |
1120 | t->aalgos = ut->aalgos; | |
1121 | t->ealgos = ut->ealgos; | |
1122 | t->calgos = ut->calgos; | |
c5d18e98 HX |
1123 | /* If all masks are ~0, then we allow all algorithms. */ |
1124 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 1125 | t->encap_family = ut->family; |
1da177e4 LT |
1126 | } |
1127 | } | |
1128 | ||
b4ad86bf DM |
1129 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
1130 | { | |
1131 | int i; | |
1132 | ||
1133 | if (nr > XFRM_MAX_DEPTH) | |
1134 | return -EINVAL; | |
1135 | ||
1136 | for (i = 0; i < nr; i++) { | |
1137 | /* We never validated the ut->family value, so many | |
1138 | * applications simply leave it at zero. The check was | |
1139 | * never made and ut->family was ignored because all | |
1140 | * templates could be assumed to have the same family as | |
1141 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1142 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1143 | */ | |
1144 | if (!ut[i].family) | |
1145 | ut[i].family = family; | |
1146 | ||
1147 | switch (ut[i].family) { | |
1148 | case AF_INET: | |
1149 | break; | |
1150 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1151 | case AF_INET6: | |
1152 | break; | |
1153 | #endif | |
1154 | default: | |
1155 | return -EINVAL; | |
3ff50b79 | 1156 | } |
b4ad86bf DM |
1157 | } |
1158 | ||
1159 | return 0; | |
1160 | } | |
1161 | ||
5424f32e | 1162 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1163 | { |
5424f32e | 1164 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1165 | |
1166 | if (!rt) { | |
1167 | pol->xfrm_nr = 0; | |
1168 | } else { | |
5424f32e TG |
1169 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1170 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1171 | int err; |
1da177e4 | 1172 | |
b4ad86bf DM |
1173 | err = validate_tmpl(nr, utmpl, pol->family); |
1174 | if (err) | |
1175 | return err; | |
1da177e4 | 1176 | |
5424f32e | 1177 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1178 | } |
1179 | return 0; | |
1180 | } | |
1181 | ||
5424f32e | 1182 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1183 | { |
5424f32e | 1184 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1185 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1186 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1187 | int err; |
1188 | ||
1189 | if (rt) { | |
5424f32e | 1190 | upt = nla_data(rt); |
f7b6983f MN |
1191 | type = upt->type; |
1192 | } | |
1193 | ||
1194 | err = verify_policy_type(type); | |
1195 | if (err) | |
1196 | return err; | |
1197 | ||
1198 | *tp = type; | |
1199 | return 0; | |
1200 | } | |
1201 | ||
1da177e4 LT |
1202 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1203 | { | |
1204 | xp->priority = p->priority; | |
1205 | xp->index = p->index; | |
1206 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1207 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1208 | xp->action = p->action; | |
1209 | xp->flags = p->flags; | |
1210 | xp->family = p->sel.family; | |
1211 | /* XXX xp->share = p->share; */ | |
1212 | } | |
1213 | ||
1214 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1215 | { | |
1216 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1217 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1218 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1219 | p->priority = xp->priority; | |
1220 | p->index = xp->index; | |
1221 | p->sel.family = xp->family; | |
1222 | p->dir = dir; | |
1223 | p->action = xp->action; | |
1224 | p->flags = xp->flags; | |
1225 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1226 | } | |
1227 | ||
fc34acd3 | 1228 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1229 | { |
fc34acd3 | 1230 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1231 | int err; |
1232 | ||
1233 | if (!xp) { | |
1234 | *errp = -ENOMEM; | |
1235 | return NULL; | |
1236 | } | |
1237 | ||
1238 | copy_from_user_policy(xp, p); | |
df71837d | 1239 | |
35a7aa08 | 1240 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1241 | if (err) |
1242 | goto error; | |
1243 | ||
35a7aa08 TG |
1244 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1245 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1246 | if (err) |
1247 | goto error; | |
1da177e4 | 1248 | |
295fae56 JHS |
1249 | xfrm_mark_get(attrs, &xp->mark); |
1250 | ||
1da177e4 | 1251 | return xp; |
f7b6983f MN |
1252 | error: |
1253 | *errp = err; | |
12a169e7 | 1254 | xp->walk.dead = 1; |
64c31b3f | 1255 | xfrm_policy_destroy(xp); |
f7b6983f | 1256 | return NULL; |
1da177e4 LT |
1257 | } |
1258 | ||
22e70050 | 1259 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1260 | struct nlattr **attrs) |
1da177e4 | 1261 | { |
fc34acd3 | 1262 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1263 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1264 | struct xfrm_policy *xp; |
26b15dad | 1265 | struct km_event c; |
1da177e4 LT |
1266 | int err; |
1267 | int excl; | |
2532386f EP |
1268 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1269 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
1270 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 LT |
1271 | |
1272 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1273 | if (err) |
1274 | return err; | |
35a7aa08 | 1275 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1276 | if (err) |
1277 | return err; | |
1278 | ||
fc34acd3 | 1279 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1280 | if (!xp) |
1281 | return err; | |
1282 | ||
26b15dad JHS |
1283 | /* shouldnt excl be based on nlh flags?? |
1284 | * Aha! this is anti-netlink really i.e more pfkey derived | |
1285 | * in netlink excl is a flag and you wouldnt need | |
1286 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1287 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1288 | err = xfrm_policy_insert(p->dir, xp, excl); | |
2532386f | 1289 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 1290 | |
1da177e4 | 1291 | if (err) { |
03e1ad7b | 1292 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1293 | kfree(xp); |
1294 | return err; | |
1295 | } | |
1296 | ||
f60f6b8f | 1297 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1298 | c.seq = nlh->nlmsg_seq; |
1299 | c.pid = nlh->nlmsg_pid; | |
1300 | km_policy_notify(xp, p->dir, &c); | |
1301 | ||
1da177e4 LT |
1302 | xfrm_pol_put(xp); |
1303 | ||
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1308 | { | |
1309 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1310 | int i; | |
1311 | ||
1312 | if (xp->xfrm_nr == 0) | |
1313 | return 0; | |
1314 | ||
1315 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1316 | struct xfrm_user_tmpl *up = &vec[i]; | |
1317 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1318 | ||
1319 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1320 | up->family = kp->encap_family; |
1da177e4 LT |
1321 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1322 | up->reqid = kp->reqid; | |
1323 | up->mode = kp->mode; | |
1324 | up->share = kp->share; | |
1325 | up->optional = kp->optional; | |
1326 | up->aalgos = kp->aalgos; | |
1327 | up->ealgos = kp->ealgos; | |
1328 | up->calgos = kp->calgos; | |
1329 | } | |
df71837d | 1330 | |
c0144bea TG |
1331 | return nla_put(skb, XFRMA_TMPL, |
1332 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1333 | } |
1334 | ||
1335 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1336 | { | |
1337 | if (x->security) { | |
1338 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1339 | } |
1340 | return 0; | |
0d681623 | 1341 | } |
df71837d | 1342 | |
0d681623 SH |
1343 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1344 | { | |
1345 | if (xp->security) { | |
1346 | return copy_sec_ctx(xp->security, skb); | |
1347 | } | |
1348 | return 0; | |
df71837d | 1349 | } |
cfbfd45a TG |
1350 | static inline size_t userpolicy_type_attrsize(void) |
1351 | { | |
1352 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1353 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1354 | #else | |
1355 | return 0; | |
1356 | #endif | |
1357 | } | |
df71837d | 1358 | |
f7b6983f | 1359 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1360 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1361 | { |
c0144bea TG |
1362 | struct xfrm_userpolicy_type upt = { |
1363 | .type = type, | |
1364 | }; | |
f7b6983f | 1365 | |
c0144bea | 1366 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1367 | } |
1368 | ||
1369 | #else | |
b798a9ed | 1370 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1371 | { |
1372 | return 0; | |
1373 | } | |
1374 | #endif | |
1375 | ||
1da177e4 LT |
1376 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1377 | { | |
1378 | struct xfrm_dump_info *sp = ptr; | |
1379 | struct xfrm_userpolicy_info *p; | |
1380 | struct sk_buff *in_skb = sp->in_skb; | |
1381 | struct sk_buff *skb = sp->out_skb; | |
1382 | struct nlmsghdr *nlh; | |
1da177e4 | 1383 | |
79b8b7f4 TG |
1384 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1385 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1386 | if (nlh == NULL) | |
1387 | return -EMSGSIZE; | |
1da177e4 | 1388 | |
7b67c857 | 1389 | p = nlmsg_data(nlh); |
1da177e4 LT |
1390 | copy_to_user_policy(xp, p, dir); |
1391 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1392 | goto nlmsg_failure; | |
df71837d TJ |
1393 | if (copy_to_user_sec_ctx(xp, skb)) |
1394 | goto nlmsg_failure; | |
1459bb36 | 1395 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1396 | goto nlmsg_failure; |
295fae56 JHS |
1397 | if (xfrm_mark_put(skb, &xp->mark)) |
1398 | goto nla_put_failure; | |
1da177e4 | 1399 | |
9825069d | 1400 | nlmsg_end(skb, nlh); |
1da177e4 LT |
1401 | return 0; |
1402 | ||
295fae56 | 1403 | nla_put_failure: |
1da177e4 | 1404 | nlmsg_failure: |
9825069d TG |
1405 | nlmsg_cancel(skb, nlh); |
1406 | return -EMSGSIZE; | |
1da177e4 LT |
1407 | } |
1408 | ||
4c563f76 TT |
1409 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1410 | { | |
1411 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
1412 | ||
1413 | xfrm_policy_walk_done(walk); | |
1414 | return 0; | |
1415 | } | |
1416 | ||
1da177e4 LT |
1417 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1418 | { | |
fc34acd3 | 1419 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1420 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1421 | struct xfrm_dump_info info; |
1422 | ||
4c563f76 TT |
1423 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1424 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1425 | ||
1da177e4 LT |
1426 | info.in_skb = cb->skb; |
1427 | info.out_skb = skb; | |
1428 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1429 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1430 | |
1431 | if (!cb->args[0]) { | |
1432 | cb->args[0] = 1; | |
1433 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1434 | } | |
1435 | ||
fc34acd3 | 1436 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1437 | |
1438 | return skb->len; | |
1439 | } | |
1440 | ||
1441 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1442 | struct xfrm_policy *xp, | |
1443 | int dir, u32 seq) | |
1444 | { | |
1445 | struct xfrm_dump_info info; | |
1446 | struct sk_buff *skb; | |
1447 | ||
7deb2264 | 1448 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1449 | if (!skb) |
1450 | return ERR_PTR(-ENOMEM); | |
1451 | ||
1da177e4 LT |
1452 | info.in_skb = in_skb; |
1453 | info.out_skb = skb; | |
1454 | info.nlmsg_seq = seq; | |
1455 | info.nlmsg_flags = 0; | |
1da177e4 LT |
1456 | |
1457 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1458 | kfree_skb(skb); | |
1459 | return NULL; | |
1460 | } | |
1461 | ||
1462 | return skb; | |
1463 | } | |
1464 | ||
22e70050 | 1465 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1466 | struct nlattr **attrs) |
1da177e4 | 1467 | { |
fc34acd3 | 1468 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1469 | struct xfrm_policy *xp; |
1470 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1471 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1472 | int err; |
26b15dad | 1473 | struct km_event c; |
1da177e4 | 1474 | int delete; |
295fae56 JHS |
1475 | struct xfrm_mark m; |
1476 | u32 mark = xfrm_mark_get(attrs, &m); | |
1da177e4 | 1477 | |
7b67c857 | 1478 | p = nlmsg_data(nlh); |
1da177e4 LT |
1479 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1480 | ||
35a7aa08 | 1481 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1482 | if (err) |
1483 | return err; | |
1484 | ||
1da177e4 LT |
1485 | err = verify_policy_dir(p->dir); |
1486 | if (err) | |
1487 | return err; | |
1488 | ||
1489 | if (p->index) | |
295fae56 | 1490 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); |
df71837d | 1491 | else { |
5424f32e | 1492 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1493 | struct xfrm_sec_ctx *ctx; |
df71837d | 1494 | |
35a7aa08 | 1495 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1496 | if (err) |
1497 | return err; | |
1498 | ||
2c8dd116 | 1499 | ctx = NULL; |
df71837d | 1500 | if (rt) { |
5424f32e | 1501 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1502 | |
03e1ad7b PM |
1503 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1504 | if (err) | |
df71837d | 1505 | return err; |
2c8dd116 | 1506 | } |
295fae56 | 1507 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, |
6f26b61e | 1508 | ctx, delete, &err); |
03e1ad7b | 1509 | security_xfrm_policy_free(ctx); |
df71837d | 1510 | } |
1da177e4 LT |
1511 | if (xp == NULL) |
1512 | return -ENOENT; | |
1513 | ||
1514 | if (!delete) { | |
1515 | struct sk_buff *resp_skb; | |
1516 | ||
1517 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1518 | if (IS_ERR(resp_skb)) { | |
1519 | err = PTR_ERR(resp_skb); | |
1520 | } else { | |
a6483b79 | 1521 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
082a1ad5 | 1522 | NETLINK_CB(skb).pid); |
1da177e4 | 1523 | } |
26b15dad | 1524 | } else { |
2532386f EP |
1525 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1526 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
1527 | u32 sid = NETLINK_CB(skb).sid; | |
1528 | ||
1529 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, | |
1530 | sid); | |
13fcfbb0 DM |
1531 | |
1532 | if (err != 0) | |
c8c05a8e | 1533 | goto out; |
13fcfbb0 | 1534 | |
e7443892 | 1535 | c.data.byid = p->index; |
f60f6b8f | 1536 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1537 | c.seq = nlh->nlmsg_seq; |
1538 | c.pid = nlh->nlmsg_pid; | |
1539 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1540 | } |
1541 | ||
c8c05a8e | 1542 | out: |
ef41aaa0 | 1543 | xfrm_pol_put(xp); |
1da177e4 LT |
1544 | return err; |
1545 | } | |
1546 | ||
22e70050 | 1547 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1548 | struct nlattr **attrs) |
1da177e4 | 1549 | { |
fc34acd3 | 1550 | struct net *net = sock_net(skb->sk); |
26b15dad | 1551 | struct km_event c; |
7b67c857 | 1552 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1553 | struct xfrm_audit audit_info; |
4aa2e62c | 1554 | int err; |
1da177e4 | 1555 | |
161a09e7 | 1556 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
2532386f | 1557 | audit_info.sessionid = NETLINK_CB(skb).sessionid; |
161a09e7 | 1558 | audit_info.secid = NETLINK_CB(skb).sid; |
fc34acd3 | 1559 | err = xfrm_state_flush(net, p->proto, &audit_info); |
9e64cc95 JHS |
1560 | if (err) { |
1561 | if (err == -ESRCH) /* empty table */ | |
1562 | return 0; | |
069c474e | 1563 | return err; |
9e64cc95 | 1564 | } |
bf08867f | 1565 | c.data.proto = p->proto; |
f60f6b8f | 1566 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1567 | c.seq = nlh->nlmsg_seq; |
1568 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1569 | c.net = net; |
26b15dad JHS |
1570 | km_state_notify(NULL, &c); |
1571 | ||
1da177e4 LT |
1572 | return 0; |
1573 | } | |
1574 | ||
7deb2264 TG |
1575 | static inline size_t xfrm_aevent_msgsize(void) |
1576 | { | |
1577 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) | |
1578 | + nla_total_size(sizeof(struct xfrm_replay_state)) | |
1579 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) | |
6f26b61e | 1580 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
1581 | + nla_total_size(4) /* XFRM_AE_RTHR */ |
1582 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1583 | } | |
d51d081d JHS |
1584 | |
1585 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1586 | { | |
1587 | struct xfrm_aevent_id *id; | |
1588 | struct nlmsghdr *nlh; | |
d51d081d | 1589 | |
79b8b7f4 TG |
1590 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1591 | if (nlh == NULL) | |
1592 | return -EMSGSIZE; | |
d51d081d | 1593 | |
7b67c857 | 1594 | id = nlmsg_data(nlh); |
2b5f6dcc | 1595 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1596 | id->sa_id.spi = x->id.spi; |
1597 | id->sa_id.family = x->props.family; | |
1598 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1599 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1600 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1601 | id->flags = c->data.aevent; |
1602 | ||
c0144bea TG |
1603 | NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); |
1604 | NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
d51d081d | 1605 | |
c0144bea TG |
1606 | if (id->flags & XFRM_AE_RTHR) |
1607 | NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
d51d081d | 1608 | |
c0144bea TG |
1609 | if (id->flags & XFRM_AE_ETHR) |
1610 | NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, | |
1611 | x->replay_maxage * 10 / HZ); | |
d51d081d | 1612 | |
6f26b61e JHS |
1613 | if (xfrm_mark_put(skb, &x->mark)) |
1614 | goto nla_put_failure; | |
1615 | ||
9825069d | 1616 | return nlmsg_end(skb, nlh); |
d51d081d | 1617 | |
c0144bea | 1618 | nla_put_failure: |
9825069d TG |
1619 | nlmsg_cancel(skb, nlh); |
1620 | return -EMSGSIZE; | |
d51d081d JHS |
1621 | } |
1622 | ||
22e70050 | 1623 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1624 | struct nlattr **attrs) |
d51d081d | 1625 | { |
fc34acd3 | 1626 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1627 | struct xfrm_state *x; |
1628 | struct sk_buff *r_skb; | |
1629 | int err; | |
1630 | struct km_event c; | |
6f26b61e JHS |
1631 | u32 mark; |
1632 | struct xfrm_mark m; | |
7b67c857 | 1633 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1634 | struct xfrm_usersa_id *id = &p->sa_id; |
1635 | ||
7deb2264 | 1636 | r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
1637 | if (r_skb == NULL) |
1638 | return -ENOMEM; | |
1639 | ||
6f26b61e JHS |
1640 | mark = xfrm_mark_get(attrs, &m); |
1641 | ||
1642 | x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); | |
d51d081d | 1643 | if (x == NULL) { |
b08d5840 | 1644 | kfree_skb(r_skb); |
d51d081d JHS |
1645 | return -ESRCH; |
1646 | } | |
1647 | ||
1648 | /* | |
1649 | * XXX: is this lock really needed - none of the other | |
1650 | * gets lock (the concern is things getting updated | |
1651 | * while we are still reading) - jhs | |
1652 | */ | |
1653 | spin_lock_bh(&x->lock); | |
1654 | c.data.aevent = p->flags; | |
1655 | c.seq = nlh->nlmsg_seq; | |
1656 | c.pid = nlh->nlmsg_pid; | |
1657 | ||
1658 | if (build_aevent(r_skb, x, &c) < 0) | |
1659 | BUG(); | |
a6483b79 | 1660 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1661 | spin_unlock_bh(&x->lock); |
1662 | xfrm_state_put(x); | |
1663 | return err; | |
1664 | } | |
1665 | ||
22e70050 | 1666 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1667 | struct nlattr **attrs) |
d51d081d | 1668 | { |
fc34acd3 | 1669 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1670 | struct xfrm_state *x; |
1671 | struct km_event c; | |
1672 | int err = - EINVAL; | |
6f26b61e JHS |
1673 | u32 mark = 0; |
1674 | struct xfrm_mark m; | |
7b67c857 | 1675 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e TG |
1676 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
1677 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
d51d081d JHS |
1678 | |
1679 | if (!lt && !rp) | |
1680 | return err; | |
1681 | ||
1682 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1683 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1684 | return err; | |
1685 | ||
6f26b61e JHS |
1686 | mark = xfrm_mark_get(attrs, &m); |
1687 | ||
1688 | x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
d51d081d JHS |
1689 | if (x == NULL) |
1690 | return -ESRCH; | |
1691 | ||
1692 | if (x->km.state != XFRM_STATE_VALID) | |
1693 | goto out; | |
1694 | ||
1695 | spin_lock_bh(&x->lock); | |
35a7aa08 | 1696 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1697 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1698 | |
1699 | c.event = nlh->nlmsg_type; | |
1700 | c.seq = nlh->nlmsg_seq; | |
1701 | c.pid = nlh->nlmsg_pid; | |
1702 | c.data.aevent = XFRM_AE_CU; | |
1703 | km_state_notify(x, &c); | |
1704 | err = 0; | |
1705 | out: | |
1706 | xfrm_state_put(x); | |
1707 | return err; | |
1708 | } | |
1709 | ||
22e70050 | 1710 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1711 | struct nlattr **attrs) |
1da177e4 | 1712 | { |
fc34acd3 | 1713 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1714 | struct km_event c; |
b798a9ed | 1715 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1716 | int err; |
161a09e7 | 1717 | struct xfrm_audit audit_info; |
f7b6983f | 1718 | |
35a7aa08 | 1719 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1720 | if (err) |
1721 | return err; | |
26b15dad | 1722 | |
161a09e7 | 1723 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
2532386f | 1724 | audit_info.sessionid = NETLINK_CB(skb).sessionid; |
161a09e7 | 1725 | audit_info.secid = NETLINK_CB(skb).sid; |
fc34acd3 | 1726 | err = xfrm_policy_flush(net, type, &audit_info); |
2f1eb65f JHS |
1727 | if (err) { |
1728 | if (err == -ESRCH) /* empty table */ | |
1729 | return 0; | |
069c474e | 1730 | return err; |
2f1eb65f JHS |
1731 | } |
1732 | ||
f7b6983f | 1733 | c.data.type = type; |
f60f6b8f | 1734 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1735 | c.seq = nlh->nlmsg_seq; |
1736 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1737 | c.net = net; |
26b15dad | 1738 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1739 | return 0; |
1740 | } | |
1741 | ||
22e70050 | 1742 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1743 | struct nlattr **attrs) |
6c5c8ca7 | 1744 | { |
fc34acd3 | 1745 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1746 | struct xfrm_policy *xp; |
7b67c857 | 1747 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1748 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1749 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 | 1750 | int err = -ENOENT; |
295fae56 JHS |
1751 | struct xfrm_mark m; |
1752 | u32 mark = xfrm_mark_get(attrs, &m); | |
6c5c8ca7 | 1753 | |
35a7aa08 | 1754 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1755 | if (err) |
1756 | return err; | |
1757 | ||
c8bf4d04 TT |
1758 | err = verify_policy_dir(p->dir); |
1759 | if (err) | |
1760 | return err; | |
1761 | ||
6c5c8ca7 | 1762 | if (p->index) |
295fae56 | 1763 | xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1764 | else { |
5424f32e | 1765 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1766 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1767 | |
35a7aa08 | 1768 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1769 | if (err) |
1770 | return err; | |
1771 | ||
2c8dd116 | 1772 | ctx = NULL; |
6c5c8ca7 | 1773 | if (rt) { |
5424f32e | 1774 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 1775 | |
03e1ad7b PM |
1776 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1777 | if (err) | |
6c5c8ca7 | 1778 | return err; |
2c8dd116 | 1779 | } |
295fae56 | 1780 | xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, |
6f26b61e | 1781 | &p->sel, ctx, 0, &err); |
03e1ad7b | 1782 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 1783 | } |
6c5c8ca7 | 1784 | if (xp == NULL) |
ef41aaa0 | 1785 | return -ENOENT; |
03e1ad7b | 1786 | |
ea2dea9d | 1787 | if (unlikely(xp->walk.dead)) |
6c5c8ca7 | 1788 | goto out; |
6c5c8ca7 | 1789 | |
6c5c8ca7 JHS |
1790 | err = 0; |
1791 | if (up->hard) { | |
2532386f EP |
1792 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1793 | uid_t sessionid = NETLINK_CB(skb).sessionid; | |
1794 | u32 sid = NETLINK_CB(skb).sid; | |
6c5c8ca7 | 1795 | xfrm_policy_delete(xp, p->dir); |
2532386f | 1796 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
161a09e7 | 1797 | |
6c5c8ca7 JHS |
1798 | } else { |
1799 | // reset the timers here? | |
62db5cfd | 1800 | WARN(1, "Dont know what to do with soft policy expire\n"); |
6c5c8ca7 JHS |
1801 | } |
1802 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1803 | ||
1804 | out: | |
1805 | xfrm_pol_put(xp); | |
1806 | return err; | |
1807 | } | |
1808 | ||
22e70050 | 1809 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1810 | struct nlattr **attrs) |
53bc6b4d | 1811 | { |
fc34acd3 | 1812 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
1813 | struct xfrm_state *x; |
1814 | int err; | |
7b67c857 | 1815 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d | 1816 | struct xfrm_usersa_info *p = &ue->state; |
6f26b61e | 1817 | struct xfrm_mark m; |
928497f0 | 1818 | u32 mark = xfrm_mark_get(attrs, &m); |
53bc6b4d | 1819 | |
6f26b61e | 1820 | x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 1821 | |
3a765aa5 | 1822 | err = -ENOENT; |
53bc6b4d JHS |
1823 | if (x == NULL) |
1824 | return err; | |
1825 | ||
53bc6b4d | 1826 | spin_lock_bh(&x->lock); |
3a765aa5 | 1827 | err = -EINVAL; |
53bc6b4d JHS |
1828 | if (x->km.state != XFRM_STATE_VALID) |
1829 | goto out; | |
1830 | km_state_expired(x, ue->hard, current->pid); | |
1831 | ||
161a09e7 | 1832 | if (ue->hard) { |
2532386f EP |
1833 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1834 | uid_t sessionid = NETLINK_CB(skb).sessionid; | |
1835 | u32 sid = NETLINK_CB(skb).sid; | |
53bc6b4d | 1836 | __xfrm_state_delete(x); |
2532386f | 1837 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
161a09e7 | 1838 | } |
3a765aa5 | 1839 | err = 0; |
53bc6b4d JHS |
1840 | out: |
1841 | spin_unlock_bh(&x->lock); | |
1842 | xfrm_state_put(x); | |
1843 | return err; | |
1844 | } | |
1845 | ||
22e70050 | 1846 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1847 | struct nlattr **attrs) |
980ebd25 | 1848 | { |
fc34acd3 | 1849 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
1850 | struct xfrm_policy *xp; |
1851 | struct xfrm_user_tmpl *ut; | |
1852 | int i; | |
5424f32e | 1853 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
6f26b61e | 1854 | struct xfrm_mark mark; |
980ebd25 | 1855 | |
7b67c857 | 1856 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 1857 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
1858 | int err = -ENOMEM; |
1859 | ||
1860 | if (!x) | |
d8eb9307 | 1861 | goto nomem; |
980ebd25 | 1862 | |
6f26b61e JHS |
1863 | xfrm_mark_get(attrs, &mark); |
1864 | ||
980ebd25 | 1865 | err = verify_newpolicy_info(&ua->policy); |
d8eb9307 IJ |
1866 | if (err) |
1867 | goto bad_policy; | |
980ebd25 JHS |
1868 | |
1869 | /* build an XP */ | |
fc34acd3 | 1870 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
1871 | if (!xp) |
1872 | goto free_state; | |
980ebd25 JHS |
1873 | |
1874 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1875 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1876 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
6f26b61e JHS |
1877 | xp->mark.m = x->mark.m = mark.m; |
1878 | xp->mark.v = x->mark.v = mark.v; | |
5424f32e | 1879 | ut = nla_data(rt); |
980ebd25 JHS |
1880 | /* extract the templates and for each call km_key */ |
1881 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1882 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1883 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1884 | x->props.mode = t->mode; | |
1885 | x->props.reqid = t->reqid; | |
1886 | x->props.family = ut->family; | |
1887 | t->aalgos = ua->aalgos; | |
1888 | t->ealgos = ua->ealgos; | |
1889 | t->calgos = ua->calgos; | |
1890 | err = km_query(x, t, xp); | |
1891 | ||
1892 | } | |
1893 | ||
1894 | kfree(x); | |
1895 | kfree(xp); | |
1896 | ||
1897 | return 0; | |
d8eb9307 IJ |
1898 | |
1899 | bad_policy: | |
62db5cfd | 1900 | WARN(1, "BAD policy passed\n"); |
d8eb9307 IJ |
1901 | free_state: |
1902 | kfree(x); | |
1903 | nomem: | |
1904 | return err; | |
980ebd25 JHS |
1905 | } |
1906 | ||
5c79de6e | 1907 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 1908 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 1909 | struct xfrm_kmaddress *k, |
5424f32e | 1910 | struct nlattr **attrs, int *num) |
5c79de6e | 1911 | { |
5424f32e | 1912 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
1913 | struct xfrm_user_migrate *um; |
1914 | int i, num_migrate; | |
1915 | ||
13c1d189 AE |
1916 | if (k != NULL) { |
1917 | struct xfrm_user_kmaddress *uk; | |
1918 | ||
1919 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
1920 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
1921 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
1922 | k->family = uk->family; | |
1923 | k->reserved = uk->reserved; | |
1924 | } | |
1925 | ||
5424f32e TG |
1926 | um = nla_data(rt); |
1927 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
1928 | |
1929 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
1930 | return -EINVAL; | |
1931 | ||
1932 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
1933 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
1934 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
1935 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
1936 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
1937 | ||
1938 | ma->proto = um->proto; | |
1939 | ma->mode = um->mode; | |
1940 | ma->reqid = um->reqid; | |
1941 | ||
1942 | ma->old_family = um->old_family; | |
1943 | ma->new_family = um->new_family; | |
1944 | } | |
1945 | ||
1946 | *num = i; | |
1947 | return 0; | |
1948 | } | |
1949 | ||
1950 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1951 | struct nlattr **attrs) |
5c79de6e | 1952 | { |
7b67c857 | 1953 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 1954 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 1955 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
1956 | u8 type; |
1957 | int err; | |
1958 | int n = 0; | |
1959 | ||
35a7aa08 | 1960 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 1961 | return -EINVAL; |
5c79de6e | 1962 | |
13c1d189 AE |
1963 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
1964 | ||
5424f32e | 1965 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
1966 | if (err) |
1967 | return err; | |
1968 | ||
13c1d189 | 1969 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
1970 | if (err) |
1971 | return err; | |
1972 | ||
1973 | if (!n) | |
1974 | return 0; | |
1975 | ||
13c1d189 | 1976 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); |
5c79de6e SS |
1977 | |
1978 | return 0; | |
1979 | } | |
1980 | #else | |
1981 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1982 | struct nlattr **attrs) |
5c79de6e SS |
1983 | { |
1984 | return -ENOPROTOOPT; | |
1985 | } | |
1986 | #endif | |
1987 | ||
1988 | #ifdef CONFIG_XFRM_MIGRATE | |
1989 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) | |
1990 | { | |
1991 | struct xfrm_user_migrate um; | |
1992 | ||
1993 | memset(&um, 0, sizeof(um)); | |
1994 | um.proto = m->proto; | |
1995 | um.mode = m->mode; | |
1996 | um.reqid = m->reqid; | |
1997 | um.old_family = m->old_family; | |
1998 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
1999 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
2000 | um.new_family = m->new_family; | |
2001 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
2002 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
2003 | ||
c0144bea | 2004 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
2005 | } |
2006 | ||
13c1d189 AE |
2007 | static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb) |
2008 | { | |
2009 | struct xfrm_user_kmaddress uk; | |
2010 | ||
2011 | memset(&uk, 0, sizeof(uk)); | |
2012 | uk.family = k->family; | |
2013 | uk.reserved = k->reserved; | |
2014 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 2015 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
2016 | |
2017 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
2018 | } | |
2019 | ||
2020 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
2021 | { |
2022 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
2023 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
2024 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
2025 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
2026 | } |
2027 | ||
5c79de6e | 2028 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, |
13c1d189 AE |
2029 | int num_migrate, struct xfrm_kmaddress *k, |
2030 | struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e SS |
2031 | { |
2032 | struct xfrm_migrate *mp; | |
2033 | struct xfrm_userpolicy_id *pol_id; | |
2034 | struct nlmsghdr *nlh; | |
5c79de6e SS |
2035 | int i; |
2036 | ||
79b8b7f4 TG |
2037 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
2038 | if (nlh == NULL) | |
2039 | return -EMSGSIZE; | |
5c79de6e | 2040 | |
7b67c857 | 2041 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
2042 | /* copy data from selector, dir, and type to the pol_id */ |
2043 | memset(pol_id, 0, sizeof(*pol_id)); | |
2044 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
2045 | pol_id->dir = dir; | |
2046 | ||
13c1d189 AE |
2047 | if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0)) |
2048 | goto nlmsg_failure; | |
2049 | ||
5c79de6e SS |
2050 | if (copy_to_user_policy_type(type, skb) < 0) |
2051 | goto nlmsg_failure; | |
2052 | ||
2053 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
2054 | if (copy_to_user_migrate(mp, skb) < 0) | |
2055 | goto nlmsg_failure; | |
2056 | } | |
2057 | ||
9825069d | 2058 | return nlmsg_end(skb, nlh); |
5c79de6e | 2059 | nlmsg_failure: |
9825069d TG |
2060 | nlmsg_cancel(skb, nlh); |
2061 | return -EMSGSIZE; | |
5c79de6e SS |
2062 | } |
2063 | ||
2064 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
2065 | struct xfrm_migrate *m, int num_migrate, |
2066 | struct xfrm_kmaddress *k) | |
5c79de6e | 2067 | { |
a6483b79 | 2068 | struct net *net = &init_net; |
5c79de6e | 2069 | struct sk_buff *skb; |
5c79de6e | 2070 | |
13c1d189 | 2071 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
2072 | if (skb == NULL) |
2073 | return -ENOMEM; | |
2074 | ||
2075 | /* build migrate */ | |
13c1d189 | 2076 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
2077 | BUG(); |
2078 | ||
a6483b79 | 2079 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
2080 | } |
2081 | #else | |
2082 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
2083 | struct xfrm_migrate *m, int num_migrate, |
2084 | struct xfrm_kmaddress *k) | |
5c79de6e SS |
2085 | { |
2086 | return -ENOPROTOOPT; | |
2087 | } | |
2088 | #endif | |
d51d081d | 2089 | |
a7bd9a45 | 2090 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
2091 | |
2092 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
66f9a259 | 2093 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
492b558b TG |
2094 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
2095 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
2096 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
2097 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2098 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
2099 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 2100 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 2101 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 2102 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
66f9a259 | 2103 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), |
6c5c8ca7 | 2104 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 2105 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 2106 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
2107 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
2108 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 2109 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 2110 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
2111 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
2112 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
2113 | }; |
2114 | ||
492b558b TG |
2115 | #undef XMSGSIZE |
2116 | ||
cf5cb79f | 2117 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
c28e9304 | 2118 | [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, |
2119 | [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, | |
2120 | [XFRMA_LASTUSED] = { .type = NLA_U64}, | |
2121 | [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, | |
1a6509d9 | 2122 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
2123 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
2124 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
2125 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
2126 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
2127 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
2128 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
2129 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
2130 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
2131 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
2132 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
2133 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
2134 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
2135 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
2136 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 2137 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
6f26b61e | 2138 | [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, |
35d2856b | 2139 | [XFRMA_TFCPAD] = { .type = NLA_U32 }, |
cf5cb79f TG |
2140 | }; |
2141 | ||
1da177e4 | 2142 | static struct xfrm_link { |
5424f32e | 2143 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 2144 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 2145 | int (*done)(struct netlink_callback *); |
492b558b TG |
2146 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
2147 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
2148 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
2149 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
2150 | .dump = xfrm_dump_sa, |
2151 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
2152 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2153 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
2154 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
2155 | .dump = xfrm_dump_policy, |
2156 | .done = xfrm_dump_policy_done }, | |
492b558b | 2157 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 2158 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 2159 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
2160 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
2161 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 2162 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
2163 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
2164 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
2165 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
2166 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 2167 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 2168 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 2169 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
2170 | }; |
2171 | ||
1d00a4eb | 2172 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2173 | { |
a6483b79 | 2174 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2175 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 2176 | struct xfrm_link *link; |
a7bd9a45 | 2177 | int type, err; |
1da177e4 | 2178 | |
1da177e4 | 2179 | type = nlh->nlmsg_type; |
1da177e4 | 2180 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2181 | return -EINVAL; |
1da177e4 LT |
2182 | |
2183 | type -= XFRM_MSG_BASE; | |
2184 | link = &xfrm_dispatch[type]; | |
2185 | ||
2186 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
2187 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
2188 | return -EPERM; | |
1da177e4 | 2189 | |
492b558b TG |
2190 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2191 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
b8f3ab42 | 2192 | (nlh->nlmsg_flags & NLM_F_DUMP)) { |
1da177e4 | 2193 | if (link->dump == NULL) |
1d00a4eb | 2194 | return -EINVAL; |
88fc2c84 | 2195 | |
a6483b79 | 2196 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done); |
1da177e4 LT |
2197 | } |
2198 | ||
35a7aa08 | 2199 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 2200 | xfrma_policy); |
a7bd9a45 TG |
2201 | if (err < 0) |
2202 | return err; | |
1da177e4 LT |
2203 | |
2204 | if (link->doit == NULL) | |
1d00a4eb | 2205 | return -EINVAL; |
1da177e4 | 2206 | |
5424f32e | 2207 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2208 | } |
2209 | ||
cd40b7d3 | 2210 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2211 | { |
cd40b7d3 DL |
2212 | mutex_lock(&xfrm_cfg_mutex); |
2213 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
2214 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
2215 | } |
2216 | ||
7deb2264 TG |
2217 | static inline size_t xfrm_expire_msgsize(void) |
2218 | { | |
6f26b61e JHS |
2219 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) |
2220 | + nla_total_size(sizeof(struct xfrm_mark)); | |
7deb2264 TG |
2221 | } |
2222 | ||
d51d081d | 2223 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
2224 | { |
2225 | struct xfrm_user_expire *ue; | |
2226 | struct nlmsghdr *nlh; | |
1da177e4 | 2227 | |
79b8b7f4 TG |
2228 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
2229 | if (nlh == NULL) | |
2230 | return -EMSGSIZE; | |
1da177e4 | 2231 | |
7b67c857 | 2232 | ue = nlmsg_data(nlh); |
1da177e4 | 2233 | copy_to_user_state(x, &ue->state); |
d51d081d | 2234 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2235 | |
6f26b61e JHS |
2236 | if (xfrm_mark_put(skb, &x->mark)) |
2237 | goto nla_put_failure; | |
2238 | ||
9825069d | 2239 | return nlmsg_end(skb, nlh); |
6f26b61e JHS |
2240 | |
2241 | nla_put_failure: | |
2242 | return -EMSGSIZE; | |
1da177e4 LT |
2243 | } |
2244 | ||
26b15dad | 2245 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 | 2246 | { |
fc34acd3 | 2247 | struct net *net = xs_net(x); |
1da177e4 LT |
2248 | struct sk_buff *skb; |
2249 | ||
7deb2264 | 2250 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2251 | if (skb == NULL) |
2252 | return -ENOMEM; | |
2253 | ||
6f26b61e JHS |
2254 | if (build_expire(skb, x, c) < 0) { |
2255 | kfree_skb(skb); | |
2256 | return -EMSGSIZE; | |
2257 | } | |
1da177e4 | 2258 | |
a6483b79 | 2259 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2260 | } |
2261 | ||
d51d081d JHS |
2262 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
2263 | { | |
fc34acd3 | 2264 | struct net *net = xs_net(x); |
d51d081d | 2265 | struct sk_buff *skb; |
d51d081d | 2266 | |
7deb2264 | 2267 | skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
2268 | if (skb == NULL) |
2269 | return -ENOMEM; | |
2270 | ||
2271 | if (build_aevent(skb, x, c) < 0) | |
2272 | BUG(); | |
2273 | ||
a6483b79 | 2274 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2275 | } |
2276 | ||
26b15dad JHS |
2277 | static int xfrm_notify_sa_flush(struct km_event *c) |
2278 | { | |
7067802e | 2279 | struct net *net = c->net; |
26b15dad JHS |
2280 | struct xfrm_usersa_flush *p; |
2281 | struct nlmsghdr *nlh; | |
2282 | struct sk_buff *skb; | |
7deb2264 | 2283 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2284 | |
7deb2264 | 2285 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2286 | if (skb == NULL) |
2287 | return -ENOMEM; | |
26b15dad | 2288 | |
79b8b7f4 TG |
2289 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2290 | if (nlh == NULL) { | |
2291 | kfree_skb(skb); | |
2292 | return -EMSGSIZE; | |
2293 | } | |
26b15dad | 2294 | |
7b67c857 | 2295 | p = nlmsg_data(nlh); |
bf08867f | 2296 | p->proto = c->data.proto; |
26b15dad | 2297 | |
9825069d | 2298 | nlmsg_end(skb, nlh); |
26b15dad | 2299 | |
a6483b79 | 2300 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2301 | } |
2302 | ||
7deb2264 | 2303 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2304 | { |
7deb2264 | 2305 | size_t l = 0; |
1a6509d9 HX |
2306 | if (x->aead) |
2307 | l += nla_total_size(aead_len(x->aead)); | |
4447bb33 MW |
2308 | if (x->aalg) { |
2309 | l += nla_total_size(sizeof(struct xfrm_algo) + | |
2310 | (x->aalg->alg_key_len + 7) / 8); | |
2311 | l += nla_total_size(xfrm_alg_auth_len(x->aalg)); | |
2312 | } | |
26b15dad | 2313 | if (x->ealg) |
0f99be0d | 2314 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2315 | if (x->calg) |
7deb2264 | 2316 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2317 | if (x->encap) |
7deb2264 | 2318 | l += nla_total_size(sizeof(*x->encap)); |
35d2856b MW |
2319 | if (x->tfcpad) |
2320 | l += nla_total_size(sizeof(x->tfcpad)); | |
68325d3b HX |
2321 | if (x->security) |
2322 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2323 | x->security->ctx_len); | |
2324 | if (x->coaddr) | |
2325 | l += nla_total_size(sizeof(*x->coaddr)); | |
2326 | ||
d26f3984 HX |
2327 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2328 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2329 | |
2330 | return l; | |
2331 | } | |
2332 | ||
2333 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
2334 | { | |
fc34acd3 | 2335 | struct net *net = xs_net(x); |
26b15dad | 2336 | struct xfrm_usersa_info *p; |
0603eac0 | 2337 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2338 | struct nlmsghdr *nlh; |
2339 | struct sk_buff *skb; | |
26b15dad | 2340 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2341 | int headlen; |
2342 | ||
2343 | headlen = sizeof(*p); | |
2344 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2345 | len += nla_total_size(headlen); |
0603eac0 | 2346 | headlen = sizeof(*id); |
6f26b61e | 2347 | len += nla_total_size(sizeof(struct xfrm_mark)); |
0603eac0 | 2348 | } |
7deb2264 | 2349 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2350 | |
7deb2264 | 2351 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2352 | if (skb == NULL) |
2353 | return -ENOMEM; | |
26b15dad | 2354 | |
79b8b7f4 TG |
2355 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2356 | if (nlh == NULL) | |
c0144bea | 2357 | goto nla_put_failure; |
26b15dad | 2358 | |
7b67c857 | 2359 | p = nlmsg_data(nlh); |
0603eac0 | 2360 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2361 | struct nlattr *attr; |
2362 | ||
7b67c857 | 2363 | id = nlmsg_data(nlh); |
0603eac0 HX |
2364 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2365 | id->spi = x->id.spi; | |
2366 | id->family = x->props.family; | |
2367 | id->proto = x->id.proto; | |
2368 | ||
c0144bea TG |
2369 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
2370 | if (attr == NULL) | |
2371 | goto nla_put_failure; | |
2372 | ||
2373 | p = nla_data(attr); | |
0603eac0 HX |
2374 | } |
2375 | ||
68325d3b HX |
2376 | if (copy_to_user_state_extra(x, p, skb)) |
2377 | goto nla_put_failure; | |
26b15dad | 2378 | |
9825069d | 2379 | nlmsg_end(skb, nlh); |
26b15dad | 2380 | |
a6483b79 | 2381 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2382 | |
c0144bea | 2383 | nla_put_failure: |
68325d3b HX |
2384 | /* Somebody screwed up with xfrm_sa_len! */ |
2385 | WARN_ON(1); | |
26b15dad JHS |
2386 | kfree_skb(skb); |
2387 | return -1; | |
2388 | } | |
2389 | ||
2390 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
2391 | { | |
2392 | ||
2393 | switch (c->event) { | |
f60f6b8f | 2394 | case XFRM_MSG_EXPIRE: |
26b15dad | 2395 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2396 | case XFRM_MSG_NEWAE: |
2397 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2398 | case XFRM_MSG_DELSA: |
2399 | case XFRM_MSG_UPDSA: | |
2400 | case XFRM_MSG_NEWSA: | |
26b15dad | 2401 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2402 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2403 | return xfrm_notify_sa_flush(c); |
2404 | default: | |
62db5cfd | 2405 | printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", |
2406 | c->event); | |
2407 | break; | |
26b15dad JHS |
2408 | } |
2409 | ||
2410 | return 0; | |
2411 | ||
2412 | } | |
2413 | ||
7deb2264 TG |
2414 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2415 | struct xfrm_policy *xp) | |
2416 | { | |
2417 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2418 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
6f26b61e | 2419 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2420 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) |
2421 | + userpolicy_type_attrsize(); | |
2422 | } | |
2423 | ||
1da177e4 LT |
2424 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2425 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2426 | int dir) | |
2427 | { | |
2428 | struct xfrm_user_acquire *ua; | |
2429 | struct nlmsghdr *nlh; | |
1da177e4 LT |
2430 | __u32 seq = xfrm_get_acqseq(); |
2431 | ||
79b8b7f4 TG |
2432 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2433 | if (nlh == NULL) | |
2434 | return -EMSGSIZE; | |
1da177e4 | 2435 | |
7b67c857 | 2436 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2437 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2438 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2439 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2440 | copy_to_user_policy(xp, &ua->policy, dir); | |
2441 | ua->aalgos = xt->aalgos; | |
2442 | ua->ealgos = xt->ealgos; | |
2443 | ua->calgos = xt->calgos; | |
2444 | ua->seq = x->km.seq = seq; | |
2445 | ||
2446 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2447 | goto nlmsg_failure; | |
0d681623 | 2448 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2449 | goto nlmsg_failure; |
1459bb36 | 2450 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2451 | goto nlmsg_failure; |
295fae56 JHS |
2452 | if (xfrm_mark_put(skb, &xp->mark)) |
2453 | goto nla_put_failure; | |
1da177e4 | 2454 | |
9825069d | 2455 | return nlmsg_end(skb, nlh); |
1da177e4 | 2456 | |
295fae56 | 2457 | nla_put_failure: |
1da177e4 | 2458 | nlmsg_failure: |
9825069d TG |
2459 | nlmsg_cancel(skb, nlh); |
2460 | return -EMSGSIZE; | |
1da177e4 LT |
2461 | } |
2462 | ||
2463 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2464 | struct xfrm_policy *xp, int dir) | |
2465 | { | |
a6483b79 | 2466 | struct net *net = xs_net(x); |
1da177e4 | 2467 | struct sk_buff *skb; |
1da177e4 | 2468 | |
7deb2264 | 2469 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2470 | if (skb == NULL) |
2471 | return -ENOMEM; | |
2472 | ||
2473 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2474 | BUG(); | |
2475 | ||
a6483b79 | 2476 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2477 | } |
2478 | ||
2479 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2480 | * or more templates. | |
2481 | */ | |
cb969f07 | 2482 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2483 | u8 *data, int len, int *dir) |
2484 | { | |
fc34acd3 | 2485 | struct net *net = sock_net(sk); |
1da177e4 LT |
2486 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2487 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2488 | struct xfrm_policy *xp; | |
2489 | int nr; | |
2490 | ||
cb969f07 | 2491 | switch (sk->sk_family) { |
1da177e4 LT |
2492 | case AF_INET: |
2493 | if (opt != IP_XFRM_POLICY) { | |
2494 | *dir = -EOPNOTSUPP; | |
2495 | return NULL; | |
2496 | } | |
2497 | break; | |
2498 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2499 | case AF_INET6: | |
2500 | if (opt != IPV6_XFRM_POLICY) { | |
2501 | *dir = -EOPNOTSUPP; | |
2502 | return NULL; | |
2503 | } | |
2504 | break; | |
2505 | #endif | |
2506 | default: | |
2507 | *dir = -EINVAL; | |
2508 | return NULL; | |
2509 | } | |
2510 | ||
2511 | *dir = -EINVAL; | |
2512 | ||
2513 | if (len < sizeof(*p) || | |
2514 | verify_newpolicy_info(p)) | |
2515 | return NULL; | |
2516 | ||
2517 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2518 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2519 | return NULL; |
2520 | ||
a4f1bac6 HX |
2521 | if (p->dir > XFRM_POLICY_OUT) |
2522 | return NULL; | |
2523 | ||
2f09a4d5 | 2524 | xp = xfrm_policy_alloc(net, GFP_ATOMIC); |
1da177e4 LT |
2525 | if (xp == NULL) { |
2526 | *dir = -ENOBUFS; | |
2527 | return NULL; | |
2528 | } | |
2529 | ||
2530 | copy_from_user_policy(xp, p); | |
f7b6983f | 2531 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2532 | copy_templates(xp, ut, nr); |
2533 | ||
2534 | *dir = p->dir; | |
2535 | ||
2536 | return xp; | |
2537 | } | |
2538 | ||
7deb2264 TG |
2539 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2540 | { | |
2541 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2542 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2543 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
295fae56 | 2544 | + nla_total_size(sizeof(struct xfrm_mark)) |
7deb2264 TG |
2545 | + userpolicy_type_attrsize(); |
2546 | } | |
2547 | ||
1da177e4 | 2548 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
d51d081d | 2549 | int dir, struct km_event *c) |
1da177e4 LT |
2550 | { |
2551 | struct xfrm_user_polexpire *upe; | |
2552 | struct nlmsghdr *nlh; | |
d51d081d | 2553 | int hard = c->data.hard; |
1da177e4 | 2554 | |
79b8b7f4 TG |
2555 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2556 | if (nlh == NULL) | |
2557 | return -EMSGSIZE; | |
1da177e4 | 2558 | |
7b67c857 | 2559 | upe = nlmsg_data(nlh); |
1da177e4 LT |
2560 | copy_to_user_policy(xp, &upe->pol, dir); |
2561 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2562 | goto nlmsg_failure; | |
df71837d TJ |
2563 | if (copy_to_user_sec_ctx(xp, skb)) |
2564 | goto nlmsg_failure; | |
1459bb36 | 2565 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2566 | goto nlmsg_failure; |
295fae56 JHS |
2567 | if (xfrm_mark_put(skb, &xp->mark)) |
2568 | goto nla_put_failure; | |
1da177e4 LT |
2569 | upe->hard = !!hard; |
2570 | ||
9825069d | 2571 | return nlmsg_end(skb, nlh); |
1da177e4 | 2572 | |
295fae56 | 2573 | nla_put_failure: |
1da177e4 | 2574 | nlmsg_failure: |
9825069d TG |
2575 | nlmsg_cancel(skb, nlh); |
2576 | return -EMSGSIZE; | |
1da177e4 LT |
2577 | } |
2578 | ||
26b15dad | 2579 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 | 2580 | { |
fc34acd3 | 2581 | struct net *net = xp_net(xp); |
1da177e4 | 2582 | struct sk_buff *skb; |
1da177e4 | 2583 | |
7deb2264 | 2584 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2585 | if (skb == NULL) |
2586 | return -ENOMEM; | |
2587 | ||
d51d081d | 2588 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2589 | BUG(); |
2590 | ||
a6483b79 | 2591 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2592 | } |
2593 | ||
26b15dad JHS |
2594 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2595 | { | |
fc34acd3 | 2596 | struct net *net = xp_net(xp); |
26b15dad | 2597 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2598 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2599 | struct nlmsghdr *nlh; |
2600 | struct sk_buff *skb; | |
7deb2264 | 2601 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2602 | int headlen; |
2603 | ||
2604 | headlen = sizeof(*p); | |
2605 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2606 | len += nla_total_size(headlen); |
0603eac0 HX |
2607 | headlen = sizeof(*id); |
2608 | } | |
cfbfd45a | 2609 | len += userpolicy_type_attrsize(); |
295fae56 | 2610 | len += nla_total_size(sizeof(struct xfrm_mark)); |
7deb2264 | 2611 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2612 | |
7deb2264 | 2613 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2614 | if (skb == NULL) |
2615 | return -ENOMEM; | |
26b15dad | 2616 | |
79b8b7f4 TG |
2617 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2618 | if (nlh == NULL) | |
2619 | goto nlmsg_failure; | |
26b15dad | 2620 | |
7b67c857 | 2621 | p = nlmsg_data(nlh); |
0603eac0 | 2622 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2623 | struct nlattr *attr; |
2624 | ||
7b67c857 | 2625 | id = nlmsg_data(nlh); |
0603eac0 HX |
2626 | memset(id, 0, sizeof(*id)); |
2627 | id->dir = dir; | |
2628 | if (c->data.byid) | |
2629 | id->index = xp->index; | |
2630 | else | |
2631 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2632 | ||
c0144bea TG |
2633 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
2634 | if (attr == NULL) | |
2635 | goto nlmsg_failure; | |
2636 | ||
2637 | p = nla_data(attr); | |
0603eac0 | 2638 | } |
26b15dad | 2639 | |
26b15dad JHS |
2640 | copy_to_user_policy(xp, p, dir); |
2641 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2642 | goto nlmsg_failure; | |
1459bb36 | 2643 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2644 | goto nlmsg_failure; |
26b15dad | 2645 | |
295fae56 JHS |
2646 | if (xfrm_mark_put(skb, &xp->mark)) |
2647 | goto nla_put_failure; | |
2648 | ||
9825069d | 2649 | nlmsg_end(skb, nlh); |
26b15dad | 2650 | |
a6483b79 | 2651 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad | 2652 | |
295fae56 | 2653 | nla_put_failure: |
26b15dad JHS |
2654 | nlmsg_failure: |
2655 | kfree_skb(skb); | |
2656 | return -1; | |
2657 | } | |
2658 | ||
2659 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2660 | { | |
7067802e | 2661 | struct net *net = c->net; |
26b15dad JHS |
2662 | struct nlmsghdr *nlh; |
2663 | struct sk_buff *skb; | |
26b15dad | 2664 | |
7deb2264 | 2665 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2666 | if (skb == NULL) |
2667 | return -ENOMEM; | |
26b15dad | 2668 | |
79b8b7f4 TG |
2669 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
2670 | if (nlh == NULL) | |
2671 | goto nlmsg_failure; | |
0c51f53c JHS |
2672 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2673 | goto nlmsg_failure; | |
26b15dad | 2674 | |
9825069d | 2675 | nlmsg_end(skb, nlh); |
26b15dad | 2676 | |
a6483b79 | 2677 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2678 | |
2679 | nlmsg_failure: | |
2680 | kfree_skb(skb); | |
2681 | return -1; | |
2682 | } | |
2683 | ||
2684 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2685 | { | |
2686 | ||
2687 | switch (c->event) { | |
f60f6b8f HX |
2688 | case XFRM_MSG_NEWPOLICY: |
2689 | case XFRM_MSG_UPDPOLICY: | |
2690 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2691 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2692 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2693 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2694 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2695 | return xfrm_exp_policy_notify(xp, dir, c); |
2696 | default: | |
62db5cfd | 2697 | printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", |
2698 | c->event); | |
26b15dad JHS |
2699 | } |
2700 | ||
2701 | return 0; | |
2702 | ||
2703 | } | |
2704 | ||
7deb2264 TG |
2705 | static inline size_t xfrm_report_msgsize(void) |
2706 | { | |
2707 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2708 | } | |
2709 | ||
97a64b45 MN |
2710 | static int build_report(struct sk_buff *skb, u8 proto, |
2711 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2712 | { | |
2713 | struct xfrm_user_report *ur; | |
2714 | struct nlmsghdr *nlh; | |
97a64b45 | 2715 | |
79b8b7f4 TG |
2716 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2717 | if (nlh == NULL) | |
2718 | return -EMSGSIZE; | |
97a64b45 | 2719 | |
7b67c857 | 2720 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2721 | ur->proto = proto; |
2722 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2723 | ||
2724 | if (addr) | |
c0144bea | 2725 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); |
97a64b45 | 2726 | |
9825069d | 2727 | return nlmsg_end(skb, nlh); |
97a64b45 | 2728 | |
c0144bea | 2729 | nla_put_failure: |
9825069d TG |
2730 | nlmsg_cancel(skb, nlh); |
2731 | return -EMSGSIZE; | |
97a64b45 MN |
2732 | } |
2733 | ||
db983c11 AD |
2734 | static int xfrm_send_report(struct net *net, u8 proto, |
2735 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2736 | { |
2737 | struct sk_buff *skb; | |
97a64b45 | 2738 | |
7deb2264 | 2739 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2740 | if (skb == NULL) |
2741 | return -ENOMEM; | |
2742 | ||
2743 | if (build_report(skb, proto, sel, addr) < 0) | |
2744 | BUG(); | |
2745 | ||
a6483b79 | 2746 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2747 | } |
2748 | ||
3a2dfbe8 MW |
2749 | static inline size_t xfrm_mapping_msgsize(void) |
2750 | { | |
2751 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
2752 | } | |
2753 | ||
2754 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
2755 | xfrm_address_t *new_saddr, __be16 new_sport) | |
2756 | { | |
2757 | struct xfrm_user_mapping *um; | |
2758 | struct nlmsghdr *nlh; | |
2759 | ||
2760 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
2761 | if (nlh == NULL) | |
2762 | return -EMSGSIZE; | |
2763 | ||
2764 | um = nlmsg_data(nlh); | |
2765 | ||
2766 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
2767 | um->id.spi = x->id.spi; | |
2768 | um->id.family = x->props.family; | |
2769 | um->id.proto = x->id.proto; | |
2770 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
2771 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
2772 | um->new_sport = new_sport; | |
2773 | um->old_sport = x->encap->encap_sport; | |
2774 | um->reqid = x->props.reqid; | |
2775 | ||
2776 | return nlmsg_end(skb, nlh); | |
2777 | } | |
2778 | ||
2779 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
2780 | __be16 sport) | |
2781 | { | |
a6483b79 | 2782 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
2783 | struct sk_buff *skb; |
2784 | ||
2785 | if (x->id.proto != IPPROTO_ESP) | |
2786 | return -EINVAL; | |
2787 | ||
2788 | if (!x->encap) | |
2789 | return -EINVAL; | |
2790 | ||
2791 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
2792 | if (skb == NULL) | |
2793 | return -ENOMEM; | |
2794 | ||
2795 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
2796 | BUG(); | |
2797 | ||
a6483b79 | 2798 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
3a2dfbe8 MW |
2799 | } |
2800 | ||
1da177e4 LT |
2801 | static struct xfrm_mgr netlink_mgr = { |
2802 | .id = "netlink", | |
2803 | .notify = xfrm_send_state_notify, | |
2804 | .acquire = xfrm_send_acquire, | |
2805 | .compile_policy = xfrm_compile_policy, | |
2806 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2807 | .report = xfrm_send_report, |
5c79de6e | 2808 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 2809 | .new_mapping = xfrm_send_mapping, |
1da177e4 LT |
2810 | }; |
2811 | ||
a6483b79 | 2812 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 2813 | { |
be33690d PM |
2814 | struct sock *nlsk; |
2815 | ||
a6483b79 | 2816 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2817 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2818 | if (nlsk == NULL) |
1da177e4 | 2819 | return -ENOMEM; |
d79d792e | 2820 | net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ |
a6483b79 | 2821 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
2822 | return 0; |
2823 | } | |
2824 | ||
d79d792e | 2825 | static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) |
1da177e4 | 2826 | { |
d79d792e EB |
2827 | struct net *net; |
2828 | list_for_each_entry(net, net_exit_list, exit_list) | |
2829 | rcu_assign_pointer(net->xfrm.nlsk, NULL); | |
2830 | synchronize_net(); | |
2831 | list_for_each_entry(net, net_exit_list, exit_list) | |
2832 | netlink_kernel_release(net->xfrm.nlsk_stash); | |
1da177e4 LT |
2833 | } |
2834 | ||
a6483b79 | 2835 | static struct pernet_operations xfrm_user_net_ops = { |
d79d792e EB |
2836 | .init = xfrm_user_net_init, |
2837 | .exit_batch = xfrm_user_net_exit, | |
a6483b79 AD |
2838 | }; |
2839 | ||
2840 | static int __init xfrm_user_init(void) | |
2841 | { | |
2842 | int rv; | |
2843 | ||
2844 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
2845 | ||
2846 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
2847 | if (rv < 0) | |
2848 | return rv; | |
2849 | rv = xfrm_register_km(&netlink_mgr); | |
2850 | if (rv < 0) | |
2851 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2852 | return rv; | |
2853 | } | |
2854 | ||
2855 | static void __exit xfrm_user_exit(void) | |
2856 | { | |
2857 | xfrm_unregister_km(&netlink_mgr); | |
2858 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2859 | } | |
2860 | ||
1da177e4 LT |
2861 | module_init(xfrm_user_init); |
2862 | module_exit(xfrm_user_exit); | |
2863 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2864 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2865 |