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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> |
1da177e4 | 29 | #include <asm/uaccess.h> |
e23c7194 MN |
30 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
31 | #include <linux/in6.h> | |
32 | #endif | |
1da177e4 | 33 | |
1a6509d9 HX |
34 | static inline int aead_len(struct xfrm_algo_aead *alg) |
35 | { | |
36 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
37 | } | |
38 | ||
5424f32e | 39 | static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) |
1da177e4 | 40 | { |
5424f32e | 41 | struct nlattr *rt = attrs[type]; |
1da177e4 LT |
42 | struct xfrm_algo *algp; |
43 | ||
44 | if (!rt) | |
45 | return 0; | |
46 | ||
5424f32e | 47 | algp = nla_data(rt); |
0f99be0d | 48 | if (nla_len(rt) < xfrm_alg_len(algp)) |
31c26852 HX |
49 | return -EINVAL; |
50 | ||
1da177e4 LT |
51 | switch (type) { |
52 | case XFRMA_ALG_AUTH: | |
1da177e4 | 53 | case XFRMA_ALG_CRYPT: |
1da177e4 | 54 | case XFRMA_ALG_COMP: |
1da177e4 LT |
55 | break; |
56 | ||
57 | default: | |
58 | return -EINVAL; | |
3ff50b79 | 59 | } |
1da177e4 LT |
60 | |
61 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
62 | return 0; | |
63 | } | |
64 | ||
1a6509d9 HX |
65 | static int verify_aead(struct nlattr **attrs) |
66 | { | |
67 | struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; | |
68 | struct xfrm_algo_aead *algp; | |
69 | ||
70 | if (!rt) | |
71 | return 0; | |
72 | ||
73 | algp = nla_data(rt); | |
74 | if (nla_len(rt) < aead_len(algp)) | |
75 | return -EINVAL; | |
76 | ||
77 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
78 | return 0; | |
79 | } | |
80 | ||
5424f32e | 81 | static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, |
eb2971b6 MN |
82 | xfrm_address_t **addrp) |
83 | { | |
5424f32e | 84 | struct nlattr *rt = attrs[type]; |
eb2971b6 | 85 | |
cf5cb79f | 86 | if (rt && addrp) |
5424f32e | 87 | *addrp = nla_data(rt); |
eb2971b6 | 88 | } |
df71837d | 89 | |
5424f32e | 90 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
df71837d | 91 | { |
5424f32e | 92 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d | 93 | struct xfrm_user_sec_ctx *uctx; |
df71837d TJ |
94 | |
95 | if (!rt) | |
96 | return 0; | |
97 | ||
5424f32e | 98 | uctx = nla_data(rt); |
cf5cb79f | 99 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
df71837d TJ |
100 | return -EINVAL; |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | ||
1da177e4 | 106 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 107 | struct nlattr **attrs) |
1da177e4 LT |
108 | { |
109 | int err; | |
110 | ||
111 | err = -EINVAL; | |
112 | switch (p->family) { | |
113 | case AF_INET: | |
114 | break; | |
115 | ||
116 | case AF_INET6: | |
117 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
118 | break; | |
119 | #else | |
120 | err = -EAFNOSUPPORT; | |
121 | goto out; | |
122 | #endif | |
123 | ||
124 | default: | |
125 | goto out; | |
3ff50b79 | 126 | } |
1da177e4 LT |
127 | |
128 | err = -EINVAL; | |
129 | switch (p->id.proto) { | |
130 | case IPPROTO_AH: | |
35a7aa08 | 131 | if (!attrs[XFRMA_ALG_AUTH] || |
1a6509d9 | 132 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
133 | attrs[XFRMA_ALG_CRYPT] || |
134 | attrs[XFRMA_ALG_COMP]) | |
1da177e4 LT |
135 | goto out; |
136 | break; | |
137 | ||
138 | case IPPROTO_ESP: | |
1a6509d9 HX |
139 | if (attrs[XFRMA_ALG_COMP]) |
140 | goto out; | |
141 | if (!attrs[XFRMA_ALG_AUTH] && | |
142 | !attrs[XFRMA_ALG_CRYPT] && | |
143 | !attrs[XFRMA_ALG_AEAD]) | |
144 | goto out; | |
145 | if ((attrs[XFRMA_ALG_AUTH] || | |
146 | attrs[XFRMA_ALG_CRYPT]) && | |
147 | attrs[XFRMA_ALG_AEAD]) | |
1da177e4 LT |
148 | goto out; |
149 | break; | |
150 | ||
151 | case IPPROTO_COMP: | |
35a7aa08 | 152 | if (!attrs[XFRMA_ALG_COMP] || |
1a6509d9 | 153 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
154 | attrs[XFRMA_ALG_AUTH] || |
155 | attrs[XFRMA_ALG_CRYPT]) | |
1da177e4 LT |
156 | goto out; |
157 | break; | |
158 | ||
e23c7194 MN |
159 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
160 | case IPPROTO_DSTOPTS: | |
161 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
162 | if (attrs[XFRMA_ALG_COMP] || |
163 | attrs[XFRMA_ALG_AUTH] || | |
1a6509d9 | 164 | attrs[XFRMA_ALG_AEAD] || |
35a7aa08 TG |
165 | attrs[XFRMA_ALG_CRYPT] || |
166 | attrs[XFRMA_ENCAP] || | |
167 | attrs[XFRMA_SEC_CTX] || | |
168 | !attrs[XFRMA_COADDR]) | |
e23c7194 MN |
169 | goto out; |
170 | break; | |
171 | #endif | |
172 | ||
1da177e4 LT |
173 | default: |
174 | goto out; | |
3ff50b79 | 175 | } |
1da177e4 | 176 | |
1a6509d9 HX |
177 | if ((err = verify_aead(attrs))) |
178 | goto out; | |
35a7aa08 | 179 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 180 | goto out; |
35a7aa08 | 181 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 182 | goto out; |
35a7aa08 | 183 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 184 | goto out; |
35a7aa08 | 185 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 186 | goto out; |
1da177e4 LT |
187 | |
188 | err = -EINVAL; | |
189 | switch (p->mode) { | |
7e49e6de MN |
190 | case XFRM_MODE_TRANSPORT: |
191 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 192 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 193 | case XFRM_MODE_BEET: |
1da177e4 LT |
194 | break; |
195 | ||
196 | default: | |
197 | goto out; | |
3ff50b79 | 198 | } |
1da177e4 LT |
199 | |
200 | err = 0; | |
201 | ||
202 | out: | |
203 | return err; | |
204 | } | |
205 | ||
206 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
207 | struct xfrm_algo_desc *(*get_byname)(char *, int), | |
5424f32e | 208 | struct nlattr *rta) |
1da177e4 | 209 | { |
1da177e4 LT |
210 | struct xfrm_algo *p, *ualg; |
211 | struct xfrm_algo_desc *algo; | |
212 | ||
213 | if (!rta) | |
214 | return 0; | |
215 | ||
5424f32e | 216 | ualg = nla_data(rta); |
1da177e4 LT |
217 | |
218 | algo = get_byname(ualg->alg_name, 1); | |
219 | if (!algo) | |
220 | return -ENOSYS; | |
221 | *props = algo->desc.sadb_alg_id; | |
222 | ||
0f99be0d | 223 | p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
224 | if (!p) |
225 | return -ENOMEM; | |
226 | ||
04ff1260 | 227 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
228 | *algpp = p; |
229 | return 0; | |
230 | } | |
231 | ||
1a6509d9 HX |
232 | static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, |
233 | struct nlattr *rta) | |
234 | { | |
235 | struct xfrm_algo_aead *p, *ualg; | |
236 | struct xfrm_algo_desc *algo; | |
237 | ||
238 | if (!rta) | |
239 | return 0; | |
240 | ||
241 | ualg = nla_data(rta); | |
242 | ||
243 | algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); | |
244 | if (!algo) | |
245 | return -ENOSYS; | |
246 | *props = algo->desc.sadb_alg_id; | |
247 | ||
248 | p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); | |
249 | if (!p) | |
250 | return -ENOMEM; | |
251 | ||
252 | strcpy(p->alg_name, algo->name); | |
253 | *algpp = p; | |
254 | return 0; | |
255 | } | |
256 | ||
661697f7 | 257 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 258 | { |
df71837d TJ |
259 | int len = 0; |
260 | ||
261 | if (xfrm_ctx) { | |
262 | len += sizeof(struct xfrm_user_sec_ctx); | |
263 | len += xfrm_ctx->ctx_len; | |
264 | } | |
265 | return len; | |
266 | } | |
267 | ||
1da177e4 LT |
268 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
269 | { | |
270 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
271 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
272 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
273 | x->props.mode = p->mode; | |
274 | x->props.replay_window = p->replay_window; | |
275 | x->props.reqid = p->reqid; | |
276 | x->props.family = p->family; | |
54489c14 | 277 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 278 | x->props.flags = p->flags; |
196b0036 | 279 | |
ccf9b3b8 | 280 | if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) |
196b0036 | 281 | x->sel.family = p->family; |
1da177e4 LT |
282 | } |
283 | ||
d51d081d JHS |
284 | /* |
285 | * someday when pfkey also has support, we could have the code | |
286 | * somehow made shareable and move it to xfrm_state.c - JHS | |
287 | * | |
288 | */ | |
5424f32e | 289 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) |
d51d081d | 290 | { |
5424f32e TG |
291 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
292 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
293 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
294 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d JHS |
295 | |
296 | if (rp) { | |
297 | struct xfrm_replay_state *replay; | |
5424f32e | 298 | replay = nla_data(rp); |
d51d081d JHS |
299 | memcpy(&x->replay, replay, sizeof(*replay)); |
300 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
301 | } | |
302 | ||
303 | if (lt) { | |
304 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 305 | ltime = nla_data(lt); |
d51d081d JHS |
306 | x->curlft.bytes = ltime->bytes; |
307 | x->curlft.packets = ltime->packets; | |
308 | x->curlft.add_time = ltime->add_time; | |
309 | x->curlft.use_time = ltime->use_time; | |
310 | } | |
311 | ||
cf5cb79f | 312 | if (et) |
5424f32e | 313 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 314 | |
cf5cb79f | 315 | if (rt) |
5424f32e | 316 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
317 | } |
318 | ||
fc34acd3 AD |
319 | static struct xfrm_state *xfrm_state_construct(struct net *net, |
320 | struct xfrm_usersa_info *p, | |
5424f32e | 321 | struct nlattr **attrs, |
1da177e4 LT |
322 | int *errp) |
323 | { | |
fc34acd3 | 324 | struct xfrm_state *x = xfrm_state_alloc(net); |
1da177e4 LT |
325 | int err = -ENOMEM; |
326 | ||
327 | if (!x) | |
328 | goto error_no_put; | |
329 | ||
330 | copy_from_user_state(x, p); | |
331 | ||
1a6509d9 HX |
332 | if ((err = attach_aead(&x->aead, &x->props.ealgo, |
333 | attrs[XFRMA_ALG_AEAD]))) | |
334 | goto error; | |
1da177e4 LT |
335 | if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, |
336 | xfrm_aalg_get_byname, | |
35a7aa08 | 337 | attrs[XFRMA_ALG_AUTH]))) |
1da177e4 LT |
338 | goto error; |
339 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, | |
340 | xfrm_ealg_get_byname, | |
35a7aa08 | 341 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
342 | goto error; |
343 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
344 | xfrm_calg_get_byname, | |
35a7aa08 | 345 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 346 | goto error; |
fd21150a TG |
347 | |
348 | if (attrs[XFRMA_ENCAP]) { | |
349 | x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), | |
350 | sizeof(*x->encap), GFP_KERNEL); | |
351 | if (x->encap == NULL) | |
352 | goto error; | |
353 | } | |
354 | ||
355 | if (attrs[XFRMA_COADDR]) { | |
356 | x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), | |
357 | sizeof(*x->coaddr), GFP_KERNEL); | |
358 | if (x->coaddr == NULL) | |
359 | goto error; | |
360 | } | |
361 | ||
72cb6962 | 362 | err = xfrm_init_state(x); |
1da177e4 LT |
363 | if (err) |
364 | goto error; | |
365 | ||
fd21150a TG |
366 | if (attrs[XFRMA_SEC_CTX] && |
367 | security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) | |
df71837d TJ |
368 | goto error; |
369 | ||
1da177e4 | 370 | x->km.seq = p->seq; |
b27aeadb | 371 | x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; |
d51d081d | 372 | /* sysctl_xfrm_aevent_etime is in 100ms units */ |
b27aeadb | 373 | x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; |
d51d081d JHS |
374 | x->preplay.bitmap = 0; |
375 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; | |
376 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; | |
377 | ||
378 | /* override default values from above */ | |
379 | ||
5424f32e | 380 | xfrm_update_ae_params(x, attrs); |
1da177e4 LT |
381 | |
382 | return x; | |
383 | ||
384 | error: | |
385 | x->km.state = XFRM_STATE_DEAD; | |
386 | xfrm_state_put(x); | |
387 | error_no_put: | |
388 | *errp = err; | |
389 | return NULL; | |
390 | } | |
391 | ||
22e70050 | 392 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 393 | struct nlattr **attrs) |
1da177e4 | 394 | { |
fc34acd3 | 395 | struct net *net = sock_net(skb->sk); |
7b67c857 | 396 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
397 | struct xfrm_state *x; |
398 | int err; | |
26b15dad | 399 | struct km_event c; |
2532386f EP |
400 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
401 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
402 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 | 403 | |
35a7aa08 | 404 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
405 | if (err) |
406 | return err; | |
407 | ||
fc34acd3 | 408 | x = xfrm_state_construct(net, p, attrs, &err); |
1da177e4 LT |
409 | if (!x) |
410 | return err; | |
411 | ||
26b15dad | 412 | xfrm_state_hold(x); |
1da177e4 LT |
413 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
414 | err = xfrm_state_add(x); | |
415 | else | |
416 | err = xfrm_state_update(x); | |
417 | ||
2532386f | 418 | xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 419 | |
1da177e4 LT |
420 | if (err < 0) { |
421 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 422 | __xfrm_state_put(x); |
7d6dfe1f | 423 | goto out; |
1da177e4 LT |
424 | } |
425 | ||
26b15dad JHS |
426 | c.seq = nlh->nlmsg_seq; |
427 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 428 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
429 | |
430 | km_state_notify(x, &c); | |
7d6dfe1f | 431 | out: |
26b15dad | 432 | xfrm_state_put(x); |
1da177e4 LT |
433 | return err; |
434 | } | |
435 | ||
fc34acd3 AD |
436 | static struct xfrm_state *xfrm_user_state_lookup(struct net *net, |
437 | struct xfrm_usersa_id *p, | |
5424f32e | 438 | struct nlattr **attrs, |
eb2971b6 MN |
439 | int *errp) |
440 | { | |
441 | struct xfrm_state *x = NULL; | |
442 | int err; | |
443 | ||
444 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
445 | err = -ESRCH; | |
fc34acd3 | 446 | x = xfrm_state_lookup(net, &p->daddr, p->spi, p->proto, p->family); |
eb2971b6 MN |
447 | } else { |
448 | xfrm_address_t *saddr = NULL; | |
449 | ||
35a7aa08 | 450 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
451 | if (!saddr) { |
452 | err = -EINVAL; | |
453 | goto out; | |
454 | } | |
455 | ||
9abbffee | 456 | err = -ESRCH; |
fc34acd3 | 457 | x = xfrm_state_lookup_byaddr(net, &p->daddr, saddr, |
221df1ed | 458 | p->proto, p->family); |
eb2971b6 MN |
459 | } |
460 | ||
461 | out: | |
462 | if (!x && errp) | |
463 | *errp = err; | |
464 | return x; | |
465 | } | |
466 | ||
22e70050 | 467 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 468 | struct nlattr **attrs) |
1da177e4 | 469 | { |
fc34acd3 | 470 | struct net *net = sock_net(skb->sk); |
1da177e4 | 471 | struct xfrm_state *x; |
eb2971b6 | 472 | int err = -ESRCH; |
26b15dad | 473 | struct km_event c; |
7b67c857 | 474 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
2532386f EP |
475 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
476 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
477 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 | 478 | |
fc34acd3 | 479 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 | 480 | if (x == NULL) |
eb2971b6 | 481 | return err; |
1da177e4 | 482 | |
6f68dc37 | 483 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
484 | goto out; |
485 | ||
1da177e4 | 486 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
487 | err = -EPERM; |
488 | goto out; | |
1da177e4 LT |
489 | } |
490 | ||
26b15dad | 491 | err = xfrm_state_delete(x); |
161a09e7 | 492 | |
c8c05a8e CZ |
493 | if (err < 0) |
494 | goto out; | |
26b15dad JHS |
495 | |
496 | c.seq = nlh->nlmsg_seq; | |
497 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 498 | c.event = nlh->nlmsg_type; |
26b15dad | 499 | km_state_notify(x, &c); |
1da177e4 | 500 | |
c8c05a8e | 501 | out: |
2532386f | 502 | xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid); |
c8c05a8e | 503 | xfrm_state_put(x); |
26b15dad | 504 | return err; |
1da177e4 LT |
505 | } |
506 | ||
507 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
508 | { | |
509 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
510 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
511 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
512 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
513 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 514 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
515 | p->mode = x->props.mode; |
516 | p->replay_window = x->props.replay_window; | |
517 | p->reqid = x->props.reqid; | |
518 | p->family = x->props.family; | |
519 | p->flags = x->props.flags; | |
520 | p->seq = x->km.seq; | |
521 | } | |
522 | ||
523 | struct xfrm_dump_info { | |
524 | struct sk_buff *in_skb; | |
525 | struct sk_buff *out_skb; | |
526 | u32 nlmsg_seq; | |
527 | u16 nlmsg_flags; | |
1da177e4 LT |
528 | }; |
529 | ||
c0144bea TG |
530 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
531 | { | |
c0144bea TG |
532 | struct xfrm_user_sec_ctx *uctx; |
533 | struct nlattr *attr; | |
68325d3b | 534 | int ctx_size = sizeof(*uctx) + s->ctx_len; |
c0144bea TG |
535 | |
536 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
537 | if (attr == NULL) | |
538 | return -EMSGSIZE; | |
539 | ||
540 | uctx = nla_data(attr); | |
541 | uctx->exttype = XFRMA_SEC_CTX; | |
542 | uctx->len = ctx_size; | |
543 | uctx->ctx_doi = s->ctx_doi; | |
544 | uctx->ctx_alg = s->ctx_alg; | |
545 | uctx->ctx_len = s->ctx_len; | |
546 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
68325d3b HX |
551 | /* Don't change this without updating xfrm_sa_len! */ |
552 | static int copy_to_user_state_extra(struct xfrm_state *x, | |
553 | struct xfrm_usersa_info *p, | |
554 | struct sk_buff *skb) | |
1da177e4 | 555 | { |
1da177e4 LT |
556 | copy_to_user_state(x, p); |
557 | ||
050f009e HX |
558 | if (x->coaddr) |
559 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); | |
560 | ||
561 | if (x->lastused) | |
562 | NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); | |
050f009e | 563 | |
1a6509d9 HX |
564 | if (x->aead) |
565 | NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); | |
1da177e4 | 566 | if (x->aalg) |
0f99be0d | 567 | NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg); |
1da177e4 | 568 | if (x->ealg) |
0f99be0d | 569 | NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); |
1da177e4 | 570 | if (x->calg) |
c0144bea | 571 | NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
1da177e4 LT |
572 | |
573 | if (x->encap) | |
c0144bea | 574 | NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
1da177e4 | 575 | |
c0144bea TG |
576 | if (x->security && copy_sec_ctx(x->security, skb) < 0) |
577 | goto nla_put_failure; | |
060f02a3 | 578 | |
68325d3b HX |
579 | return 0; |
580 | ||
581 | nla_put_failure: | |
582 | return -EMSGSIZE; | |
583 | } | |
584 | ||
585 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) | |
586 | { | |
587 | struct xfrm_dump_info *sp = ptr; | |
588 | struct sk_buff *in_skb = sp->in_skb; | |
589 | struct sk_buff *skb = sp->out_skb; | |
590 | struct xfrm_usersa_info *p; | |
591 | struct nlmsghdr *nlh; | |
592 | int err; | |
593 | ||
68325d3b HX |
594 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
595 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
596 | if (nlh == NULL) | |
597 | return -EMSGSIZE; | |
598 | ||
599 | p = nlmsg_data(nlh); | |
600 | ||
601 | err = copy_to_user_state_extra(x, p, skb); | |
602 | if (err) | |
603 | goto nla_put_failure; | |
604 | ||
9825069d | 605 | nlmsg_end(skb, nlh); |
1da177e4 LT |
606 | return 0; |
607 | ||
c0144bea | 608 | nla_put_failure: |
9825069d | 609 | nlmsg_cancel(skb, nlh); |
68325d3b | 610 | return err; |
1da177e4 LT |
611 | } |
612 | ||
4c563f76 TT |
613 | static int xfrm_dump_sa_done(struct netlink_callback *cb) |
614 | { | |
615 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; | |
616 | xfrm_state_walk_done(walk); | |
617 | return 0; | |
618 | } | |
619 | ||
1da177e4 LT |
620 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) |
621 | { | |
fc34acd3 | 622 | struct net *net = sock_net(skb->sk); |
4c563f76 | 623 | struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; |
1da177e4 LT |
624 | struct xfrm_dump_info info; |
625 | ||
4c563f76 TT |
626 | BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > |
627 | sizeof(cb->args) - sizeof(cb->args[0])); | |
628 | ||
1da177e4 LT |
629 | info.in_skb = cb->skb; |
630 | info.out_skb = skb; | |
631 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
632 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
633 | |
634 | if (!cb->args[0]) { | |
635 | cb->args[0] = 1; | |
636 | xfrm_state_walk_init(walk, 0); | |
637 | } | |
638 | ||
fc34acd3 | 639 | (void) xfrm_state_walk(net, walk, dump_one_state, &info); |
1da177e4 LT |
640 | |
641 | return skb->len; | |
642 | } | |
643 | ||
644 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
645 | struct xfrm_state *x, u32 seq) | |
646 | { | |
647 | struct xfrm_dump_info info; | |
648 | struct sk_buff *skb; | |
649 | ||
7deb2264 | 650 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
651 | if (!skb) |
652 | return ERR_PTR(-ENOMEM); | |
653 | ||
1da177e4 LT |
654 | info.in_skb = in_skb; |
655 | info.out_skb = skb; | |
656 | info.nlmsg_seq = seq; | |
657 | info.nlmsg_flags = 0; | |
1da177e4 LT |
658 | |
659 | if (dump_one_state(x, 0, &info)) { | |
660 | kfree_skb(skb); | |
661 | return NULL; | |
662 | } | |
663 | ||
664 | return skb; | |
665 | } | |
666 | ||
7deb2264 TG |
667 | static inline size_t xfrm_spdinfo_msgsize(void) |
668 | { | |
669 | return NLMSG_ALIGN(4) | |
670 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
671 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
672 | } | |
673 | ||
ecfd6b18 JHS |
674 | static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
675 | { | |
5a6d3416 JHS |
676 | struct xfrmk_spdinfo si; |
677 | struct xfrmu_spdinfo spc; | |
678 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 JHS |
679 | struct nlmsghdr *nlh; |
680 | u32 *f; | |
681 | ||
682 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
683 | if (nlh == NULL) /* shouldnt really happen ... */ | |
684 | return -EMSGSIZE; | |
685 | ||
686 | f = nlmsg_data(nlh); | |
687 | *f = flags; | |
688 | xfrm_spd_getinfo(&si); | |
5a6d3416 JHS |
689 | spc.incnt = si.incnt; |
690 | spc.outcnt = si.outcnt; | |
691 | spc.fwdcnt = si.fwdcnt; | |
692 | spc.inscnt = si.inscnt; | |
693 | spc.outscnt = si.outscnt; | |
694 | spc.fwdscnt = si.fwdscnt; | |
695 | sph.spdhcnt = si.spdhcnt; | |
696 | sph.spdhmcnt = si.spdhmcnt; | |
697 | ||
698 | NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); | |
699 | NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
ecfd6b18 JHS |
700 | |
701 | return nlmsg_end(skb, nlh); | |
702 | ||
703 | nla_put_failure: | |
704 | nlmsg_cancel(skb, nlh); | |
705 | return -EMSGSIZE; | |
706 | } | |
707 | ||
708 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 709 | struct nlattr **attrs) |
ecfd6b18 | 710 | { |
a6483b79 | 711 | struct net *net = sock_net(skb->sk); |
ecfd6b18 | 712 | struct sk_buff *r_skb; |
7b67c857 | 713 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
714 | u32 spid = NETLINK_CB(skb).pid; |
715 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 716 | |
7deb2264 | 717 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
718 | if (r_skb == NULL) |
719 | return -ENOMEM; | |
720 | ||
721 | if (build_spdinfo(r_skb, spid, seq, *flags) < 0) | |
722 | BUG(); | |
723 | ||
a6483b79 | 724 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
ecfd6b18 JHS |
725 | } |
726 | ||
7deb2264 TG |
727 | static inline size_t xfrm_sadinfo_msgsize(void) |
728 | { | |
729 | return NLMSG_ALIGN(4) | |
730 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
731 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
732 | } | |
733 | ||
28d8909b JHS |
734 | static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
735 | { | |
af11e316 JHS |
736 | struct xfrmk_sadinfo si; |
737 | struct xfrmu_sadhinfo sh; | |
28d8909b JHS |
738 | struct nlmsghdr *nlh; |
739 | u32 *f; | |
740 | ||
741 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
742 | if (nlh == NULL) /* shouldnt really happen ... */ | |
743 | return -EMSGSIZE; | |
744 | ||
745 | f = nlmsg_data(nlh); | |
746 | *f = flags; | |
747 | xfrm_sad_getinfo(&si); | |
748 | ||
af11e316 JHS |
749 | sh.sadhmcnt = si.sadhmcnt; |
750 | sh.sadhcnt = si.sadhcnt; | |
751 | ||
752 | NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); | |
753 | NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
28d8909b JHS |
754 | |
755 | return nlmsg_end(skb, nlh); | |
756 | ||
757 | nla_put_failure: | |
758 | nlmsg_cancel(skb, nlh); | |
759 | return -EMSGSIZE; | |
760 | } | |
761 | ||
762 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 763 | struct nlattr **attrs) |
28d8909b | 764 | { |
a6483b79 | 765 | struct net *net = sock_net(skb->sk); |
28d8909b | 766 | struct sk_buff *r_skb; |
7b67c857 | 767 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
768 | u32 spid = NETLINK_CB(skb).pid; |
769 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 770 | |
7deb2264 | 771 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
772 | if (r_skb == NULL) |
773 | return -ENOMEM; | |
774 | ||
775 | if (build_sadinfo(r_skb, spid, seq, *flags) < 0) | |
776 | BUG(); | |
777 | ||
a6483b79 | 778 | return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); |
28d8909b JHS |
779 | } |
780 | ||
22e70050 | 781 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 782 | struct nlattr **attrs) |
1da177e4 | 783 | { |
fc34acd3 | 784 | struct net *net = sock_net(skb->sk); |
7b67c857 | 785 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
786 | struct xfrm_state *x; |
787 | struct sk_buff *resp_skb; | |
eb2971b6 | 788 | int err = -ESRCH; |
1da177e4 | 789 | |
fc34acd3 | 790 | x = xfrm_user_state_lookup(net, p, attrs, &err); |
1da177e4 LT |
791 | if (x == NULL) |
792 | goto out_noput; | |
793 | ||
794 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
795 | if (IS_ERR(resp_skb)) { | |
796 | err = PTR_ERR(resp_skb); | |
797 | } else { | |
a6483b79 | 798 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
799 | } |
800 | xfrm_state_put(x); | |
801 | out_noput: | |
802 | return err; | |
803 | } | |
804 | ||
805 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
806 | { | |
807 | switch (p->info.id.proto) { | |
808 | case IPPROTO_AH: | |
809 | case IPPROTO_ESP: | |
810 | break; | |
811 | ||
812 | case IPPROTO_COMP: | |
813 | /* IPCOMP spi is 16-bits. */ | |
814 | if (p->max >= 0x10000) | |
815 | return -EINVAL; | |
816 | break; | |
817 | ||
818 | default: | |
819 | return -EINVAL; | |
3ff50b79 | 820 | } |
1da177e4 LT |
821 | |
822 | if (p->min > p->max) | |
823 | return -EINVAL; | |
824 | ||
825 | return 0; | |
826 | } | |
827 | ||
22e70050 | 828 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 829 | struct nlattr **attrs) |
1da177e4 | 830 | { |
fc34acd3 | 831 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
832 | struct xfrm_state *x; |
833 | struct xfrm_userspi_info *p; | |
834 | struct sk_buff *resp_skb; | |
835 | xfrm_address_t *daddr; | |
836 | int family; | |
837 | int err; | |
838 | ||
7b67c857 | 839 | p = nlmsg_data(nlh); |
1da177e4 LT |
840 | err = verify_userspi_info(p); |
841 | if (err) | |
842 | goto out_noput; | |
843 | ||
844 | family = p->info.family; | |
845 | daddr = &p->info.id.daddr; | |
846 | ||
847 | x = NULL; | |
848 | if (p->info.seq) { | |
a6483b79 | 849 | x = xfrm_find_acq_byseq(net, p->info.seq); |
1da177e4 LT |
850 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { |
851 | xfrm_state_put(x); | |
852 | x = NULL; | |
853 | } | |
854 | } | |
855 | ||
856 | if (!x) | |
a6483b79 | 857 | x = xfrm_find_acq(net, p->info.mode, p->info.reqid, |
1da177e4 LT |
858 | p->info.id.proto, daddr, |
859 | &p->info.saddr, 1, | |
860 | family); | |
861 | err = -ENOENT; | |
862 | if (x == NULL) | |
863 | goto out_noput; | |
864 | ||
658b219e HX |
865 | err = xfrm_alloc_spi(x, p->min, p->max); |
866 | if (err) | |
867 | goto out; | |
1da177e4 | 868 | |
658b219e | 869 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); |
1da177e4 LT |
870 | if (IS_ERR(resp_skb)) { |
871 | err = PTR_ERR(resp_skb); | |
872 | goto out; | |
873 | } | |
874 | ||
a6483b79 | 875 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
876 | |
877 | out: | |
878 | xfrm_state_put(x); | |
879 | out_noput: | |
880 | return err; | |
881 | } | |
882 | ||
b798a9ed | 883 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
884 | { |
885 | switch (dir) { | |
886 | case XFRM_POLICY_IN: | |
887 | case XFRM_POLICY_OUT: | |
888 | case XFRM_POLICY_FWD: | |
889 | break; | |
890 | ||
891 | default: | |
892 | return -EINVAL; | |
3ff50b79 | 893 | } |
1da177e4 LT |
894 | |
895 | return 0; | |
896 | } | |
897 | ||
b798a9ed | 898 | static int verify_policy_type(u8 type) |
f7b6983f MN |
899 | { |
900 | switch (type) { | |
901 | case XFRM_POLICY_TYPE_MAIN: | |
902 | #ifdef CONFIG_XFRM_SUB_POLICY | |
903 | case XFRM_POLICY_TYPE_SUB: | |
904 | #endif | |
905 | break; | |
906 | ||
907 | default: | |
908 | return -EINVAL; | |
3ff50b79 | 909 | } |
f7b6983f MN |
910 | |
911 | return 0; | |
912 | } | |
913 | ||
1da177e4 LT |
914 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
915 | { | |
916 | switch (p->share) { | |
917 | case XFRM_SHARE_ANY: | |
918 | case XFRM_SHARE_SESSION: | |
919 | case XFRM_SHARE_USER: | |
920 | case XFRM_SHARE_UNIQUE: | |
921 | break; | |
922 | ||
923 | default: | |
924 | return -EINVAL; | |
3ff50b79 | 925 | } |
1da177e4 LT |
926 | |
927 | switch (p->action) { | |
928 | case XFRM_POLICY_ALLOW: | |
929 | case XFRM_POLICY_BLOCK: | |
930 | break; | |
931 | ||
932 | default: | |
933 | return -EINVAL; | |
3ff50b79 | 934 | } |
1da177e4 LT |
935 | |
936 | switch (p->sel.family) { | |
937 | case AF_INET: | |
938 | break; | |
939 | ||
940 | case AF_INET6: | |
941 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
942 | break; | |
943 | #else | |
944 | return -EAFNOSUPPORT; | |
945 | #endif | |
946 | ||
947 | default: | |
948 | return -EINVAL; | |
3ff50b79 | 949 | } |
1da177e4 LT |
950 | |
951 | return verify_policy_dir(p->dir); | |
952 | } | |
953 | ||
5424f32e | 954 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 955 | { |
5424f32e | 956 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
957 | struct xfrm_user_sec_ctx *uctx; |
958 | ||
959 | if (!rt) | |
960 | return 0; | |
961 | ||
5424f32e | 962 | uctx = nla_data(rt); |
03e1ad7b | 963 | return security_xfrm_policy_alloc(&pol->security, uctx); |
df71837d TJ |
964 | } |
965 | ||
1da177e4 LT |
966 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
967 | int nr) | |
968 | { | |
969 | int i; | |
970 | ||
971 | xp->xfrm_nr = nr; | |
972 | for (i = 0; i < nr; i++, ut++) { | |
973 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
974 | ||
975 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
976 | memcpy(&t->saddr, &ut->saddr, | |
977 | sizeof(xfrm_address_t)); | |
978 | t->reqid = ut->reqid; | |
979 | t->mode = ut->mode; | |
980 | t->share = ut->share; | |
981 | t->optional = ut->optional; | |
982 | t->aalgos = ut->aalgos; | |
983 | t->ealgos = ut->ealgos; | |
984 | t->calgos = ut->calgos; | |
c5d18e98 HX |
985 | /* If all masks are ~0, then we allow all algorithms. */ |
986 | t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); | |
8511d01d | 987 | t->encap_family = ut->family; |
1da177e4 LT |
988 | } |
989 | } | |
990 | ||
b4ad86bf DM |
991 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
992 | { | |
993 | int i; | |
994 | ||
995 | if (nr > XFRM_MAX_DEPTH) | |
996 | return -EINVAL; | |
997 | ||
998 | for (i = 0; i < nr; i++) { | |
999 | /* We never validated the ut->family value, so many | |
1000 | * applications simply leave it at zero. The check was | |
1001 | * never made and ut->family was ignored because all | |
1002 | * templates could be assumed to have the same family as | |
1003 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
1004 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
1005 | */ | |
1006 | if (!ut[i].family) | |
1007 | ut[i].family = family; | |
1008 | ||
1009 | switch (ut[i].family) { | |
1010 | case AF_INET: | |
1011 | break; | |
1012 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
1013 | case AF_INET6: | |
1014 | break; | |
1015 | #endif | |
1016 | default: | |
1017 | return -EINVAL; | |
3ff50b79 | 1018 | } |
b4ad86bf DM |
1019 | } |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
5424f32e | 1024 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 1025 | { |
5424f32e | 1026 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
1027 | |
1028 | if (!rt) { | |
1029 | pol->xfrm_nr = 0; | |
1030 | } else { | |
5424f32e TG |
1031 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
1032 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 1033 | int err; |
1da177e4 | 1034 | |
b4ad86bf DM |
1035 | err = validate_tmpl(nr, utmpl, pol->family); |
1036 | if (err) | |
1037 | return err; | |
1da177e4 | 1038 | |
5424f32e | 1039 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
1040 | } |
1041 | return 0; | |
1042 | } | |
1043 | ||
5424f32e | 1044 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1045 | { |
5424f32e | 1046 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1047 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1048 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1049 | int err; |
1050 | ||
1051 | if (rt) { | |
5424f32e | 1052 | upt = nla_data(rt); |
f7b6983f MN |
1053 | type = upt->type; |
1054 | } | |
1055 | ||
1056 | err = verify_policy_type(type); | |
1057 | if (err) | |
1058 | return err; | |
1059 | ||
1060 | *tp = type; | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1da177e4 LT |
1064 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1065 | { | |
1066 | xp->priority = p->priority; | |
1067 | xp->index = p->index; | |
1068 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1069 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1070 | xp->action = p->action; | |
1071 | xp->flags = p->flags; | |
1072 | xp->family = p->sel.family; | |
1073 | /* XXX xp->share = p->share; */ | |
1074 | } | |
1075 | ||
1076 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1077 | { | |
1078 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1079 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1080 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1081 | p->priority = xp->priority; | |
1082 | p->index = xp->index; | |
1083 | p->sel.family = xp->family; | |
1084 | p->dir = dir; | |
1085 | p->action = xp->action; | |
1086 | p->flags = xp->flags; | |
1087 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1088 | } | |
1089 | ||
fc34acd3 | 1090 | static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 | 1091 | { |
fc34acd3 | 1092 | struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
1093 | int err; |
1094 | ||
1095 | if (!xp) { | |
1096 | *errp = -ENOMEM; | |
1097 | return NULL; | |
1098 | } | |
1099 | ||
1100 | copy_from_user_policy(xp, p); | |
df71837d | 1101 | |
35a7aa08 | 1102 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1103 | if (err) |
1104 | goto error; | |
1105 | ||
35a7aa08 TG |
1106 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1107 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1108 | if (err) |
1109 | goto error; | |
1da177e4 LT |
1110 | |
1111 | return xp; | |
f7b6983f MN |
1112 | error: |
1113 | *errp = err; | |
12a169e7 | 1114 | xp->walk.dead = 1; |
64c31b3f | 1115 | xfrm_policy_destroy(xp); |
f7b6983f | 1116 | return NULL; |
1da177e4 LT |
1117 | } |
1118 | ||
22e70050 | 1119 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1120 | struct nlattr **attrs) |
1da177e4 | 1121 | { |
fc34acd3 | 1122 | struct net *net = sock_net(skb->sk); |
7b67c857 | 1123 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1124 | struct xfrm_policy *xp; |
26b15dad | 1125 | struct km_event c; |
1da177e4 LT |
1126 | int err; |
1127 | int excl; | |
2532386f EP |
1128 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1129 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
1130 | u32 sid = NETLINK_CB(skb).sid; | |
1da177e4 LT |
1131 | |
1132 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1133 | if (err) |
1134 | return err; | |
35a7aa08 | 1135 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1136 | if (err) |
1137 | return err; | |
1138 | ||
fc34acd3 | 1139 | xp = xfrm_policy_construct(net, p, attrs, &err); |
1da177e4 LT |
1140 | if (!xp) |
1141 | return err; | |
1142 | ||
26b15dad JHS |
1143 | /* shouldnt excl be based on nlh flags?? |
1144 | * Aha! this is anti-netlink really i.e more pfkey derived | |
1145 | * in netlink excl is a flag and you wouldnt need | |
1146 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1147 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1148 | err = xfrm_policy_insert(p->dir, xp, excl); | |
2532386f | 1149 | xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); |
161a09e7 | 1150 | |
1da177e4 | 1151 | if (err) { |
03e1ad7b | 1152 | security_xfrm_policy_free(xp->security); |
1da177e4 LT |
1153 | kfree(xp); |
1154 | return err; | |
1155 | } | |
1156 | ||
f60f6b8f | 1157 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1158 | c.seq = nlh->nlmsg_seq; |
1159 | c.pid = nlh->nlmsg_pid; | |
1160 | km_policy_notify(xp, p->dir, &c); | |
1161 | ||
1da177e4 LT |
1162 | xfrm_pol_put(xp); |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1168 | { | |
1169 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1170 | int i; | |
1171 | ||
1172 | if (xp->xfrm_nr == 0) | |
1173 | return 0; | |
1174 | ||
1175 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1176 | struct xfrm_user_tmpl *up = &vec[i]; | |
1177 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1178 | ||
1179 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1180 | up->family = kp->encap_family; |
1da177e4 LT |
1181 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1182 | up->reqid = kp->reqid; | |
1183 | up->mode = kp->mode; | |
1184 | up->share = kp->share; | |
1185 | up->optional = kp->optional; | |
1186 | up->aalgos = kp->aalgos; | |
1187 | up->ealgos = kp->ealgos; | |
1188 | up->calgos = kp->calgos; | |
1189 | } | |
df71837d | 1190 | |
c0144bea TG |
1191 | return nla_put(skb, XFRMA_TMPL, |
1192 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1193 | } |
1194 | ||
1195 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1196 | { | |
1197 | if (x->security) { | |
1198 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1199 | } |
1200 | return 0; | |
0d681623 | 1201 | } |
df71837d | 1202 | |
0d681623 SH |
1203 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1204 | { | |
1205 | if (xp->security) { | |
1206 | return copy_sec_ctx(xp->security, skb); | |
1207 | } | |
1208 | return 0; | |
df71837d | 1209 | } |
cfbfd45a TG |
1210 | static inline size_t userpolicy_type_attrsize(void) |
1211 | { | |
1212 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1213 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1214 | #else | |
1215 | return 0; | |
1216 | #endif | |
1217 | } | |
df71837d | 1218 | |
f7b6983f | 1219 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1220 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1221 | { |
c0144bea TG |
1222 | struct xfrm_userpolicy_type upt = { |
1223 | .type = type, | |
1224 | }; | |
f7b6983f | 1225 | |
c0144bea | 1226 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1227 | } |
1228 | ||
1229 | #else | |
b798a9ed | 1230 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1231 | { |
1232 | return 0; | |
1233 | } | |
1234 | #endif | |
1235 | ||
1da177e4 LT |
1236 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1237 | { | |
1238 | struct xfrm_dump_info *sp = ptr; | |
1239 | struct xfrm_userpolicy_info *p; | |
1240 | struct sk_buff *in_skb = sp->in_skb; | |
1241 | struct sk_buff *skb = sp->out_skb; | |
1242 | struct nlmsghdr *nlh; | |
1da177e4 | 1243 | |
79b8b7f4 TG |
1244 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1245 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1246 | if (nlh == NULL) | |
1247 | return -EMSGSIZE; | |
1da177e4 | 1248 | |
7b67c857 | 1249 | p = nlmsg_data(nlh); |
1da177e4 LT |
1250 | copy_to_user_policy(xp, p, dir); |
1251 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1252 | goto nlmsg_failure; | |
df71837d TJ |
1253 | if (copy_to_user_sec_ctx(xp, skb)) |
1254 | goto nlmsg_failure; | |
1459bb36 | 1255 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1256 | goto nlmsg_failure; |
1da177e4 | 1257 | |
9825069d | 1258 | nlmsg_end(skb, nlh); |
1da177e4 LT |
1259 | return 0; |
1260 | ||
1261 | nlmsg_failure: | |
9825069d TG |
1262 | nlmsg_cancel(skb, nlh); |
1263 | return -EMSGSIZE; | |
1da177e4 LT |
1264 | } |
1265 | ||
4c563f76 TT |
1266 | static int xfrm_dump_policy_done(struct netlink_callback *cb) |
1267 | { | |
1268 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; | |
1269 | ||
1270 | xfrm_policy_walk_done(walk); | |
1271 | return 0; | |
1272 | } | |
1273 | ||
1da177e4 LT |
1274 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) |
1275 | { | |
fc34acd3 | 1276 | struct net *net = sock_net(skb->sk); |
4c563f76 | 1277 | struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; |
1da177e4 LT |
1278 | struct xfrm_dump_info info; |
1279 | ||
4c563f76 TT |
1280 | BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > |
1281 | sizeof(cb->args) - sizeof(cb->args[0])); | |
1282 | ||
1da177e4 LT |
1283 | info.in_skb = cb->skb; |
1284 | info.out_skb = skb; | |
1285 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1286 | info.nlmsg_flags = NLM_F_MULTI; | |
4c563f76 TT |
1287 | |
1288 | if (!cb->args[0]) { | |
1289 | cb->args[0] = 1; | |
1290 | xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); | |
1291 | } | |
1292 | ||
fc34acd3 | 1293 | (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); |
1da177e4 LT |
1294 | |
1295 | return skb->len; | |
1296 | } | |
1297 | ||
1298 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1299 | struct xfrm_policy *xp, | |
1300 | int dir, u32 seq) | |
1301 | { | |
1302 | struct xfrm_dump_info info; | |
1303 | struct sk_buff *skb; | |
1304 | ||
7deb2264 | 1305 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1306 | if (!skb) |
1307 | return ERR_PTR(-ENOMEM); | |
1308 | ||
1da177e4 LT |
1309 | info.in_skb = in_skb; |
1310 | info.out_skb = skb; | |
1311 | info.nlmsg_seq = seq; | |
1312 | info.nlmsg_flags = 0; | |
1da177e4 LT |
1313 | |
1314 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1315 | kfree_skb(skb); | |
1316 | return NULL; | |
1317 | } | |
1318 | ||
1319 | return skb; | |
1320 | } | |
1321 | ||
22e70050 | 1322 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1323 | struct nlattr **attrs) |
1da177e4 | 1324 | { |
fc34acd3 | 1325 | struct net *net = sock_net(skb->sk); |
1da177e4 LT |
1326 | struct xfrm_policy *xp; |
1327 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1328 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1329 | int err; |
26b15dad | 1330 | struct km_event c; |
1da177e4 LT |
1331 | int delete; |
1332 | ||
7b67c857 | 1333 | p = nlmsg_data(nlh); |
1da177e4 LT |
1334 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1335 | ||
35a7aa08 | 1336 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1337 | if (err) |
1338 | return err; | |
1339 | ||
1da177e4 LT |
1340 | err = verify_policy_dir(p->dir); |
1341 | if (err) | |
1342 | return err; | |
1343 | ||
1344 | if (p->index) | |
a6483b79 | 1345 | xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err); |
df71837d | 1346 | else { |
5424f32e | 1347 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1348 | struct xfrm_sec_ctx *ctx; |
df71837d | 1349 | |
35a7aa08 | 1350 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1351 | if (err) |
1352 | return err; | |
1353 | ||
2c8dd116 | 1354 | ctx = NULL; |
df71837d | 1355 | if (rt) { |
5424f32e | 1356 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d | 1357 | |
03e1ad7b PM |
1358 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1359 | if (err) | |
df71837d | 1360 | return err; |
2c8dd116 | 1361 | } |
a6483b79 | 1362 | xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx, |
ef41aaa0 | 1363 | delete, &err); |
03e1ad7b | 1364 | security_xfrm_policy_free(ctx); |
df71837d | 1365 | } |
1da177e4 LT |
1366 | if (xp == NULL) |
1367 | return -ENOENT; | |
1368 | ||
1369 | if (!delete) { | |
1370 | struct sk_buff *resp_skb; | |
1371 | ||
1372 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1373 | if (IS_ERR(resp_skb)) { | |
1374 | err = PTR_ERR(resp_skb); | |
1375 | } else { | |
a6483b79 | 1376 | err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, |
082a1ad5 | 1377 | NETLINK_CB(skb).pid); |
1da177e4 | 1378 | } |
26b15dad | 1379 | } else { |
2532386f EP |
1380 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1381 | u32 sessionid = NETLINK_CB(skb).sessionid; | |
1382 | u32 sid = NETLINK_CB(skb).sid; | |
1383 | ||
1384 | xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, | |
1385 | sid); | |
13fcfbb0 DM |
1386 | |
1387 | if (err != 0) | |
c8c05a8e | 1388 | goto out; |
13fcfbb0 | 1389 | |
e7443892 | 1390 | c.data.byid = p->index; |
f60f6b8f | 1391 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1392 | c.seq = nlh->nlmsg_seq; |
1393 | c.pid = nlh->nlmsg_pid; | |
1394 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1395 | } |
1396 | ||
c8c05a8e | 1397 | out: |
ef41aaa0 | 1398 | xfrm_pol_put(xp); |
1da177e4 LT |
1399 | return err; |
1400 | } | |
1401 | ||
22e70050 | 1402 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1403 | struct nlattr **attrs) |
1da177e4 | 1404 | { |
fc34acd3 | 1405 | struct net *net = sock_net(skb->sk); |
26b15dad | 1406 | struct km_event c; |
7b67c857 | 1407 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1408 | struct xfrm_audit audit_info; |
4aa2e62c | 1409 | int err; |
1da177e4 | 1410 | |
161a09e7 | 1411 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
2532386f | 1412 | audit_info.sessionid = NETLINK_CB(skb).sessionid; |
161a09e7 | 1413 | audit_info.secid = NETLINK_CB(skb).sid; |
fc34acd3 | 1414 | err = xfrm_state_flush(net, p->proto, &audit_info); |
4aa2e62c JL |
1415 | if (err) |
1416 | return err; | |
bf08867f | 1417 | c.data.proto = p->proto; |
f60f6b8f | 1418 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1419 | c.seq = nlh->nlmsg_seq; |
1420 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1421 | c.net = net; |
26b15dad JHS |
1422 | km_state_notify(NULL, &c); |
1423 | ||
1da177e4 LT |
1424 | return 0; |
1425 | } | |
1426 | ||
7deb2264 TG |
1427 | static inline size_t xfrm_aevent_msgsize(void) |
1428 | { | |
1429 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) | |
1430 | + nla_total_size(sizeof(struct xfrm_replay_state)) | |
1431 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) | |
1432 | + nla_total_size(4) /* XFRM_AE_RTHR */ | |
1433 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1434 | } | |
d51d081d JHS |
1435 | |
1436 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1437 | { | |
1438 | struct xfrm_aevent_id *id; | |
1439 | struct nlmsghdr *nlh; | |
d51d081d | 1440 | |
79b8b7f4 TG |
1441 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1442 | if (nlh == NULL) | |
1443 | return -EMSGSIZE; | |
d51d081d | 1444 | |
7b67c857 | 1445 | id = nlmsg_data(nlh); |
2b5f6dcc | 1446 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1447 | id->sa_id.spi = x->id.spi; |
1448 | id->sa_id.family = x->props.family; | |
1449 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1450 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1451 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1452 | id->flags = c->data.aevent; |
1453 | ||
c0144bea TG |
1454 | NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); |
1455 | NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
d51d081d | 1456 | |
c0144bea TG |
1457 | if (id->flags & XFRM_AE_RTHR) |
1458 | NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
d51d081d | 1459 | |
c0144bea TG |
1460 | if (id->flags & XFRM_AE_ETHR) |
1461 | NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, | |
1462 | x->replay_maxage * 10 / HZ); | |
d51d081d | 1463 | |
9825069d | 1464 | return nlmsg_end(skb, nlh); |
d51d081d | 1465 | |
c0144bea | 1466 | nla_put_failure: |
9825069d TG |
1467 | nlmsg_cancel(skb, nlh); |
1468 | return -EMSGSIZE; | |
d51d081d JHS |
1469 | } |
1470 | ||
22e70050 | 1471 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1472 | struct nlattr **attrs) |
d51d081d | 1473 | { |
fc34acd3 | 1474 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1475 | struct xfrm_state *x; |
1476 | struct sk_buff *r_skb; | |
1477 | int err; | |
1478 | struct km_event c; | |
7b67c857 | 1479 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1480 | struct xfrm_usersa_id *id = &p->sa_id; |
1481 | ||
7deb2264 | 1482 | r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
1483 | if (r_skb == NULL) |
1484 | return -ENOMEM; | |
1485 | ||
a6483b79 | 1486 | x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family); |
d51d081d | 1487 | if (x == NULL) { |
b08d5840 | 1488 | kfree_skb(r_skb); |
d51d081d JHS |
1489 | return -ESRCH; |
1490 | } | |
1491 | ||
1492 | /* | |
1493 | * XXX: is this lock really needed - none of the other | |
1494 | * gets lock (the concern is things getting updated | |
1495 | * while we are still reading) - jhs | |
1496 | */ | |
1497 | spin_lock_bh(&x->lock); | |
1498 | c.data.aevent = p->flags; | |
1499 | c.seq = nlh->nlmsg_seq; | |
1500 | c.pid = nlh->nlmsg_pid; | |
1501 | ||
1502 | if (build_aevent(r_skb, x, &c) < 0) | |
1503 | BUG(); | |
a6483b79 | 1504 | err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1505 | spin_unlock_bh(&x->lock); |
1506 | xfrm_state_put(x); | |
1507 | return err; | |
1508 | } | |
1509 | ||
22e70050 | 1510 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1511 | struct nlattr **attrs) |
d51d081d | 1512 | { |
fc34acd3 | 1513 | struct net *net = sock_net(skb->sk); |
d51d081d JHS |
1514 | struct xfrm_state *x; |
1515 | struct km_event c; | |
1516 | int err = - EINVAL; | |
7b67c857 | 1517 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e TG |
1518 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
1519 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
d51d081d JHS |
1520 | |
1521 | if (!lt && !rp) | |
1522 | return err; | |
1523 | ||
1524 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1525 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1526 | return err; | |
1527 | ||
fc34acd3 | 1528 | x = xfrm_state_lookup(net, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); |
d51d081d JHS |
1529 | if (x == NULL) |
1530 | return -ESRCH; | |
1531 | ||
1532 | if (x->km.state != XFRM_STATE_VALID) | |
1533 | goto out; | |
1534 | ||
1535 | spin_lock_bh(&x->lock); | |
35a7aa08 | 1536 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1537 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1538 | |
1539 | c.event = nlh->nlmsg_type; | |
1540 | c.seq = nlh->nlmsg_seq; | |
1541 | c.pid = nlh->nlmsg_pid; | |
1542 | c.data.aevent = XFRM_AE_CU; | |
1543 | km_state_notify(x, &c); | |
1544 | err = 0; | |
1545 | out: | |
1546 | xfrm_state_put(x); | |
1547 | return err; | |
1548 | } | |
1549 | ||
22e70050 | 1550 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1551 | struct nlattr **attrs) |
1da177e4 | 1552 | { |
fc34acd3 | 1553 | struct net *net = sock_net(skb->sk); |
f7b6983f | 1554 | struct km_event c; |
b798a9ed | 1555 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1556 | int err; |
161a09e7 | 1557 | struct xfrm_audit audit_info; |
f7b6983f | 1558 | |
35a7aa08 | 1559 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1560 | if (err) |
1561 | return err; | |
26b15dad | 1562 | |
161a09e7 | 1563 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
2532386f | 1564 | audit_info.sessionid = NETLINK_CB(skb).sessionid; |
161a09e7 | 1565 | audit_info.secid = NETLINK_CB(skb).sid; |
fc34acd3 | 1566 | err = xfrm_policy_flush(net, type, &audit_info); |
4aa2e62c JL |
1567 | if (err) |
1568 | return err; | |
f7b6983f | 1569 | c.data.type = type; |
f60f6b8f | 1570 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1571 | c.seq = nlh->nlmsg_seq; |
1572 | c.pid = nlh->nlmsg_pid; | |
7067802e | 1573 | c.net = net; |
26b15dad | 1574 | km_policy_notify(NULL, 0, &c); |
1da177e4 LT |
1575 | return 0; |
1576 | } | |
1577 | ||
22e70050 | 1578 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1579 | struct nlattr **attrs) |
6c5c8ca7 | 1580 | { |
fc34acd3 | 1581 | struct net *net = sock_net(skb->sk); |
6c5c8ca7 | 1582 | struct xfrm_policy *xp; |
7b67c857 | 1583 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1584 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1585 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 JHS |
1586 | int err = -ENOENT; |
1587 | ||
35a7aa08 | 1588 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1589 | if (err) |
1590 | return err; | |
1591 | ||
6c5c8ca7 | 1592 | if (p->index) |
fc34acd3 | 1593 | xp = xfrm_policy_byid(net, type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1594 | else { |
5424f32e | 1595 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
03e1ad7b | 1596 | struct xfrm_sec_ctx *ctx; |
6c5c8ca7 | 1597 | |
35a7aa08 | 1598 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1599 | if (err) |
1600 | return err; | |
1601 | ||
2c8dd116 | 1602 | ctx = NULL; |
6c5c8ca7 | 1603 | if (rt) { |
5424f32e | 1604 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 | 1605 | |
03e1ad7b PM |
1606 | err = security_xfrm_policy_alloc(&ctx, uctx); |
1607 | if (err) | |
6c5c8ca7 | 1608 | return err; |
2c8dd116 | 1609 | } |
fc34acd3 | 1610 | xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx, 0, &err); |
03e1ad7b | 1611 | security_xfrm_policy_free(ctx); |
6c5c8ca7 | 1612 | } |
6c5c8ca7 | 1613 | if (xp == NULL) |
ef41aaa0 | 1614 | return -ENOENT; |
03e1ad7b | 1615 | |
ef41aaa0 | 1616 | read_lock(&xp->lock); |
12a169e7 | 1617 | if (xp->walk.dead) { |
6c5c8ca7 JHS |
1618 | read_unlock(&xp->lock); |
1619 | goto out; | |
1620 | } | |
1621 | ||
1622 | read_unlock(&xp->lock); | |
1623 | err = 0; | |
1624 | if (up->hard) { | |
2532386f EP |
1625 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1626 | uid_t sessionid = NETLINK_CB(skb).sessionid; | |
1627 | u32 sid = NETLINK_CB(skb).sid; | |
6c5c8ca7 | 1628 | xfrm_policy_delete(xp, p->dir); |
2532386f | 1629 | xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); |
161a09e7 | 1630 | |
6c5c8ca7 JHS |
1631 | } else { |
1632 | // reset the timers here? | |
1633 | printk("Dont know what to do with soft policy expire\n"); | |
1634 | } | |
1635 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1636 | ||
1637 | out: | |
1638 | xfrm_pol_put(xp); | |
1639 | return err; | |
1640 | } | |
1641 | ||
22e70050 | 1642 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1643 | struct nlattr **attrs) |
53bc6b4d | 1644 | { |
fc34acd3 | 1645 | struct net *net = sock_net(skb->sk); |
53bc6b4d JHS |
1646 | struct xfrm_state *x; |
1647 | int err; | |
7b67c857 | 1648 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d JHS |
1649 | struct xfrm_usersa_info *p = &ue->state; |
1650 | ||
fc34acd3 | 1651 | x = xfrm_state_lookup(net, &p->id.daddr, p->id.spi, p->id.proto, p->family); |
53bc6b4d | 1652 | |
3a765aa5 | 1653 | err = -ENOENT; |
53bc6b4d JHS |
1654 | if (x == NULL) |
1655 | return err; | |
1656 | ||
53bc6b4d | 1657 | spin_lock_bh(&x->lock); |
3a765aa5 | 1658 | err = -EINVAL; |
53bc6b4d JHS |
1659 | if (x->km.state != XFRM_STATE_VALID) |
1660 | goto out; | |
1661 | km_state_expired(x, ue->hard, current->pid); | |
1662 | ||
161a09e7 | 1663 | if (ue->hard) { |
2532386f EP |
1664 | uid_t loginuid = NETLINK_CB(skb).loginuid; |
1665 | uid_t sessionid = NETLINK_CB(skb).sessionid; | |
1666 | u32 sid = NETLINK_CB(skb).sid; | |
53bc6b4d | 1667 | __xfrm_state_delete(x); |
2532386f | 1668 | xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); |
161a09e7 | 1669 | } |
3a765aa5 | 1670 | err = 0; |
53bc6b4d JHS |
1671 | out: |
1672 | spin_unlock_bh(&x->lock); | |
1673 | xfrm_state_put(x); | |
1674 | return err; | |
1675 | } | |
1676 | ||
22e70050 | 1677 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1678 | struct nlattr **attrs) |
980ebd25 | 1679 | { |
fc34acd3 | 1680 | struct net *net = sock_net(skb->sk); |
980ebd25 JHS |
1681 | struct xfrm_policy *xp; |
1682 | struct xfrm_user_tmpl *ut; | |
1683 | int i; | |
5424f32e | 1684 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
980ebd25 | 1685 | |
7b67c857 | 1686 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
fc34acd3 | 1687 | struct xfrm_state *x = xfrm_state_alloc(net); |
980ebd25 JHS |
1688 | int err = -ENOMEM; |
1689 | ||
1690 | if (!x) | |
d8eb9307 | 1691 | goto nomem; |
980ebd25 JHS |
1692 | |
1693 | err = verify_newpolicy_info(&ua->policy); | |
d8eb9307 IJ |
1694 | if (err) |
1695 | goto bad_policy; | |
980ebd25 JHS |
1696 | |
1697 | /* build an XP */ | |
fc34acd3 | 1698 | xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); |
d8eb9307 IJ |
1699 | if (!xp) |
1700 | goto free_state; | |
980ebd25 JHS |
1701 | |
1702 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1703 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1704 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
1705 | ||
5424f32e | 1706 | ut = nla_data(rt); |
980ebd25 JHS |
1707 | /* extract the templates and for each call km_key */ |
1708 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1709 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1710 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1711 | x->props.mode = t->mode; | |
1712 | x->props.reqid = t->reqid; | |
1713 | x->props.family = ut->family; | |
1714 | t->aalgos = ua->aalgos; | |
1715 | t->ealgos = ua->ealgos; | |
1716 | t->calgos = ua->calgos; | |
1717 | err = km_query(x, t, xp); | |
1718 | ||
1719 | } | |
1720 | ||
1721 | kfree(x); | |
1722 | kfree(xp); | |
1723 | ||
1724 | return 0; | |
d8eb9307 IJ |
1725 | |
1726 | bad_policy: | |
1727 | printk("BAD policy passed\n"); | |
1728 | free_state: | |
1729 | kfree(x); | |
1730 | nomem: | |
1731 | return err; | |
980ebd25 JHS |
1732 | } |
1733 | ||
5c79de6e | 1734 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 1735 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
13c1d189 | 1736 | struct xfrm_kmaddress *k, |
5424f32e | 1737 | struct nlattr **attrs, int *num) |
5c79de6e | 1738 | { |
5424f32e | 1739 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
1740 | struct xfrm_user_migrate *um; |
1741 | int i, num_migrate; | |
1742 | ||
13c1d189 AE |
1743 | if (k != NULL) { |
1744 | struct xfrm_user_kmaddress *uk; | |
1745 | ||
1746 | uk = nla_data(attrs[XFRMA_KMADDRESS]); | |
1747 | memcpy(&k->local, &uk->local, sizeof(k->local)); | |
1748 | memcpy(&k->remote, &uk->remote, sizeof(k->remote)); | |
1749 | k->family = uk->family; | |
1750 | k->reserved = uk->reserved; | |
1751 | } | |
1752 | ||
5424f32e TG |
1753 | um = nla_data(rt); |
1754 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
1755 | |
1756 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
1757 | return -EINVAL; | |
1758 | ||
1759 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
1760 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
1761 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
1762 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
1763 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
1764 | ||
1765 | ma->proto = um->proto; | |
1766 | ma->mode = um->mode; | |
1767 | ma->reqid = um->reqid; | |
1768 | ||
1769 | ma->old_family = um->old_family; | |
1770 | ma->new_family = um->new_family; | |
1771 | } | |
1772 | ||
1773 | *num = i; | |
1774 | return 0; | |
1775 | } | |
1776 | ||
1777 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1778 | struct nlattr **attrs) |
5c79de6e | 1779 | { |
7b67c857 | 1780 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e | 1781 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
13c1d189 | 1782 | struct xfrm_kmaddress km, *kmp; |
5c79de6e SS |
1783 | u8 type; |
1784 | int err; | |
1785 | int n = 0; | |
1786 | ||
35a7aa08 | 1787 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 1788 | return -EINVAL; |
5c79de6e | 1789 | |
13c1d189 AE |
1790 | kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; |
1791 | ||
5424f32e | 1792 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
1793 | if (err) |
1794 | return err; | |
1795 | ||
13c1d189 | 1796 | err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); |
5c79de6e SS |
1797 | if (err) |
1798 | return err; | |
1799 | ||
1800 | if (!n) | |
1801 | return 0; | |
1802 | ||
13c1d189 | 1803 | xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); |
5c79de6e SS |
1804 | |
1805 | return 0; | |
1806 | } | |
1807 | #else | |
1808 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1809 | struct nlattr **attrs) |
5c79de6e SS |
1810 | { |
1811 | return -ENOPROTOOPT; | |
1812 | } | |
1813 | #endif | |
1814 | ||
1815 | #ifdef CONFIG_XFRM_MIGRATE | |
1816 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) | |
1817 | { | |
1818 | struct xfrm_user_migrate um; | |
1819 | ||
1820 | memset(&um, 0, sizeof(um)); | |
1821 | um.proto = m->proto; | |
1822 | um.mode = m->mode; | |
1823 | um.reqid = m->reqid; | |
1824 | um.old_family = m->old_family; | |
1825 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
1826 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
1827 | um.new_family = m->new_family; | |
1828 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
1829 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
1830 | ||
c0144bea | 1831 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
1832 | } |
1833 | ||
13c1d189 AE |
1834 | static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb) |
1835 | { | |
1836 | struct xfrm_user_kmaddress uk; | |
1837 | ||
1838 | memset(&uk, 0, sizeof(uk)); | |
1839 | uk.family = k->family; | |
1840 | uk.reserved = k->reserved; | |
1841 | memcpy(&uk.local, &k->local, sizeof(uk.local)); | |
a1caa322 | 1842 | memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); |
13c1d189 AE |
1843 | |
1844 | return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); | |
1845 | } | |
1846 | ||
1847 | static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) | |
7deb2264 TG |
1848 | { |
1849 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
13c1d189 AE |
1850 | + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) |
1851 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
1852 | + userpolicy_type_attrsize(); | |
7deb2264 TG |
1853 | } |
1854 | ||
5c79de6e | 1855 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, |
13c1d189 AE |
1856 | int num_migrate, struct xfrm_kmaddress *k, |
1857 | struct xfrm_selector *sel, u8 dir, u8 type) | |
5c79de6e SS |
1858 | { |
1859 | struct xfrm_migrate *mp; | |
1860 | struct xfrm_userpolicy_id *pol_id; | |
1861 | struct nlmsghdr *nlh; | |
5c79de6e SS |
1862 | int i; |
1863 | ||
79b8b7f4 TG |
1864 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
1865 | if (nlh == NULL) | |
1866 | return -EMSGSIZE; | |
5c79de6e | 1867 | |
7b67c857 | 1868 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
1869 | /* copy data from selector, dir, and type to the pol_id */ |
1870 | memset(pol_id, 0, sizeof(*pol_id)); | |
1871 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
1872 | pol_id->dir = dir; | |
1873 | ||
13c1d189 AE |
1874 | if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0)) |
1875 | goto nlmsg_failure; | |
1876 | ||
5c79de6e SS |
1877 | if (copy_to_user_policy_type(type, skb) < 0) |
1878 | goto nlmsg_failure; | |
1879 | ||
1880 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
1881 | if (copy_to_user_migrate(mp, skb) < 0) | |
1882 | goto nlmsg_failure; | |
1883 | } | |
1884 | ||
9825069d | 1885 | return nlmsg_end(skb, nlh); |
5c79de6e | 1886 | nlmsg_failure: |
9825069d TG |
1887 | nlmsg_cancel(skb, nlh); |
1888 | return -EMSGSIZE; | |
5c79de6e SS |
1889 | } |
1890 | ||
1891 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
1892 | struct xfrm_migrate *m, int num_migrate, |
1893 | struct xfrm_kmaddress *k) | |
5c79de6e | 1894 | { |
a6483b79 | 1895 | struct net *net = &init_net; |
5c79de6e | 1896 | struct sk_buff *skb; |
5c79de6e | 1897 | |
13c1d189 | 1898 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); |
5c79de6e SS |
1899 | if (skb == NULL) |
1900 | return -ENOMEM; | |
1901 | ||
1902 | /* build migrate */ | |
13c1d189 | 1903 | if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) |
5c79de6e SS |
1904 | BUG(); |
1905 | ||
a6483b79 | 1906 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
1907 | } |
1908 | #else | |
1909 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
1910 | struct xfrm_migrate *m, int num_migrate, |
1911 | struct xfrm_kmaddress *k) | |
5c79de6e SS |
1912 | { |
1913 | return -ENOPROTOOPT; | |
1914 | } | |
1915 | #endif | |
d51d081d | 1916 | |
fc8c7dc1 DM |
1917 | /* For the xfrm_usersa_info cases we have to work around some 32-bit vs. |
1918 | * 64-bit compatability issues. On 32-bit the structure is 220 bytes, but | |
1919 | * for 64-bit it gets padded out to 224 bytes. Those bytes are just | |
1920 | * padding and don't have any content we care about. Therefore as long | |
1921 | * as we have enough bytes for the content we can make both cases work. | |
1922 | */ | |
1923 | ||
a7bd9a45 | 1924 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
1925 | |
1926 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
fc8c7dc1 | 1927 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = 220, /* see above */ |
492b558b TG |
1928 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), |
1929 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1930 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
1931 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1932 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1933 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 1934 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 1935 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b | 1936 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
fc8c7dc1 | 1937 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = 220, /* see above */ |
6c5c8ca7 | 1938 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 1939 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 1940 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
1941 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
1942 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 1943 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 1944 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
1945 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
1946 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
1947 | }; |
1948 | ||
492b558b TG |
1949 | #undef XMSGSIZE |
1950 | ||
cf5cb79f | 1951 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
1a6509d9 | 1952 | [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, |
cf5cb79f TG |
1953 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, |
1954 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
1955 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
1956 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
1957 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
1958 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
1959 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
1960 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
1961 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
1962 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
1963 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
1964 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
1965 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
1966 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
13c1d189 | 1967 | [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, |
cf5cb79f TG |
1968 | }; |
1969 | ||
1da177e4 | 1970 | static struct xfrm_link { |
5424f32e | 1971 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 1972 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
4c563f76 | 1973 | int (*done)(struct netlink_callback *); |
492b558b TG |
1974 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
1975 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
1976 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
1977 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
4c563f76 TT |
1978 | .dump = xfrm_dump_sa, |
1979 | .done = xfrm_dump_sa_done }, | |
492b558b TG |
1980 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
1981 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
1982 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
4c563f76 TT |
1983 | .dump = xfrm_dump_policy, |
1984 | .done = xfrm_dump_policy_done }, | |
492b558b | 1985 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, |
980ebd25 | 1986 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 1987 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
1988 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
1989 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 1990 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
1991 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
1992 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
1993 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
1994 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 1995 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 1996 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 1997 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
1998 | }; |
1999 | ||
1d00a4eb | 2000 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 2001 | { |
a6483b79 | 2002 | struct net *net = sock_net(skb->sk); |
35a7aa08 | 2003 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 2004 | struct xfrm_link *link; |
a7bd9a45 | 2005 | int type, err; |
1da177e4 | 2006 | |
1da177e4 | 2007 | type = nlh->nlmsg_type; |
1da177e4 | 2008 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 2009 | return -EINVAL; |
1da177e4 LT |
2010 | |
2011 | type -= XFRM_MSG_BASE; | |
2012 | link = &xfrm_dispatch[type]; | |
2013 | ||
2014 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
2015 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
2016 | return -EPERM; | |
1da177e4 | 2017 | |
492b558b TG |
2018 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
2019 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
2020 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 | 2021 | if (link->dump == NULL) |
1d00a4eb | 2022 | return -EINVAL; |
88fc2c84 | 2023 | |
a6483b79 | 2024 | return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done); |
1da177e4 LT |
2025 | } |
2026 | ||
35a7aa08 | 2027 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 2028 | xfrma_policy); |
a7bd9a45 TG |
2029 | if (err < 0) |
2030 | return err; | |
1da177e4 LT |
2031 | |
2032 | if (link->doit == NULL) | |
1d00a4eb | 2033 | return -EINVAL; |
1da177e4 | 2034 | |
5424f32e | 2035 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
2036 | } |
2037 | ||
cd40b7d3 | 2038 | static void xfrm_netlink_rcv(struct sk_buff *skb) |
1da177e4 | 2039 | { |
cd40b7d3 DL |
2040 | mutex_lock(&xfrm_cfg_mutex); |
2041 | netlink_rcv_skb(skb, &xfrm_user_rcv_msg); | |
2042 | mutex_unlock(&xfrm_cfg_mutex); | |
1da177e4 LT |
2043 | } |
2044 | ||
7deb2264 TG |
2045 | static inline size_t xfrm_expire_msgsize(void) |
2046 | { | |
2047 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)); | |
2048 | } | |
2049 | ||
d51d081d | 2050 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
2051 | { |
2052 | struct xfrm_user_expire *ue; | |
2053 | struct nlmsghdr *nlh; | |
1da177e4 | 2054 | |
79b8b7f4 TG |
2055 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
2056 | if (nlh == NULL) | |
2057 | return -EMSGSIZE; | |
1da177e4 | 2058 | |
7b67c857 | 2059 | ue = nlmsg_data(nlh); |
1da177e4 | 2060 | copy_to_user_state(x, &ue->state); |
d51d081d | 2061 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 2062 | |
9825069d | 2063 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2064 | } |
2065 | ||
26b15dad | 2066 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 | 2067 | { |
fc34acd3 | 2068 | struct net *net = xs_net(x); |
1da177e4 LT |
2069 | struct sk_buff *skb; |
2070 | ||
7deb2264 | 2071 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
2072 | if (skb == NULL) |
2073 | return -ENOMEM; | |
2074 | ||
d51d081d | 2075 | if (build_expire(skb, x, c) < 0) |
1da177e4 LT |
2076 | BUG(); |
2077 | ||
a6483b79 | 2078 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2079 | } |
2080 | ||
d51d081d JHS |
2081 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
2082 | { | |
fc34acd3 | 2083 | struct net *net = xs_net(x); |
d51d081d | 2084 | struct sk_buff *skb; |
d51d081d | 2085 | |
7deb2264 | 2086 | skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
2087 | if (skb == NULL) |
2088 | return -ENOMEM; | |
2089 | ||
2090 | if (build_aevent(skb, x, c) < 0) | |
2091 | BUG(); | |
2092 | ||
a6483b79 | 2093 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
2094 | } |
2095 | ||
26b15dad JHS |
2096 | static int xfrm_notify_sa_flush(struct km_event *c) |
2097 | { | |
7067802e | 2098 | struct net *net = c->net; |
26b15dad JHS |
2099 | struct xfrm_usersa_flush *p; |
2100 | struct nlmsghdr *nlh; | |
2101 | struct sk_buff *skb; | |
7deb2264 | 2102 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 2103 | |
7deb2264 | 2104 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2105 | if (skb == NULL) |
2106 | return -ENOMEM; | |
26b15dad | 2107 | |
79b8b7f4 TG |
2108 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
2109 | if (nlh == NULL) { | |
2110 | kfree_skb(skb); | |
2111 | return -EMSGSIZE; | |
2112 | } | |
26b15dad | 2113 | |
7b67c857 | 2114 | p = nlmsg_data(nlh); |
bf08867f | 2115 | p->proto = c->data.proto; |
26b15dad | 2116 | |
9825069d | 2117 | nlmsg_end(skb, nlh); |
26b15dad | 2118 | |
a6483b79 | 2119 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2120 | } |
2121 | ||
7deb2264 | 2122 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2123 | { |
7deb2264 | 2124 | size_t l = 0; |
1a6509d9 HX |
2125 | if (x->aead) |
2126 | l += nla_total_size(aead_len(x->aead)); | |
26b15dad | 2127 | if (x->aalg) |
0f99be0d | 2128 | l += nla_total_size(xfrm_alg_len(x->aalg)); |
26b15dad | 2129 | if (x->ealg) |
0f99be0d | 2130 | l += nla_total_size(xfrm_alg_len(x->ealg)); |
26b15dad | 2131 | if (x->calg) |
7deb2264 | 2132 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2133 | if (x->encap) |
7deb2264 | 2134 | l += nla_total_size(sizeof(*x->encap)); |
68325d3b HX |
2135 | if (x->security) |
2136 | l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + | |
2137 | x->security->ctx_len); | |
2138 | if (x->coaddr) | |
2139 | l += nla_total_size(sizeof(*x->coaddr)); | |
2140 | ||
d26f3984 HX |
2141 | /* Must count x->lastused as it may become non-zero behind our back. */ |
2142 | l += nla_total_size(sizeof(u64)); | |
26b15dad JHS |
2143 | |
2144 | return l; | |
2145 | } | |
2146 | ||
2147 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
2148 | { | |
fc34acd3 | 2149 | struct net *net = xs_net(x); |
26b15dad | 2150 | struct xfrm_usersa_info *p; |
0603eac0 | 2151 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2152 | struct nlmsghdr *nlh; |
2153 | struct sk_buff *skb; | |
26b15dad | 2154 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2155 | int headlen; |
2156 | ||
2157 | headlen = sizeof(*p); | |
2158 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2159 | len += nla_total_size(headlen); |
0603eac0 HX |
2160 | headlen = sizeof(*id); |
2161 | } | |
7deb2264 | 2162 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2163 | |
7deb2264 | 2164 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2165 | if (skb == NULL) |
2166 | return -ENOMEM; | |
26b15dad | 2167 | |
79b8b7f4 TG |
2168 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2169 | if (nlh == NULL) | |
c0144bea | 2170 | goto nla_put_failure; |
26b15dad | 2171 | |
7b67c857 | 2172 | p = nlmsg_data(nlh); |
0603eac0 | 2173 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2174 | struct nlattr *attr; |
2175 | ||
7b67c857 | 2176 | id = nlmsg_data(nlh); |
0603eac0 HX |
2177 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2178 | id->spi = x->id.spi; | |
2179 | id->family = x->props.family; | |
2180 | id->proto = x->id.proto; | |
2181 | ||
c0144bea TG |
2182 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
2183 | if (attr == NULL) | |
2184 | goto nla_put_failure; | |
2185 | ||
2186 | p = nla_data(attr); | |
0603eac0 HX |
2187 | } |
2188 | ||
68325d3b HX |
2189 | if (copy_to_user_state_extra(x, p, skb)) |
2190 | goto nla_put_failure; | |
26b15dad | 2191 | |
9825069d | 2192 | nlmsg_end(skb, nlh); |
26b15dad | 2193 | |
a6483b79 | 2194 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2195 | |
c0144bea | 2196 | nla_put_failure: |
68325d3b HX |
2197 | /* Somebody screwed up with xfrm_sa_len! */ |
2198 | WARN_ON(1); | |
26b15dad JHS |
2199 | kfree_skb(skb); |
2200 | return -1; | |
2201 | } | |
2202 | ||
2203 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
2204 | { | |
2205 | ||
2206 | switch (c->event) { | |
f60f6b8f | 2207 | case XFRM_MSG_EXPIRE: |
26b15dad | 2208 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2209 | case XFRM_MSG_NEWAE: |
2210 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2211 | case XFRM_MSG_DELSA: |
2212 | case XFRM_MSG_UPDSA: | |
2213 | case XFRM_MSG_NEWSA: | |
26b15dad | 2214 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2215 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2216 | return xfrm_notify_sa_flush(c); |
2217 | default: | |
2218 | printk("xfrm_user: Unknown SA event %d\n", c->event); | |
2219 | break; | |
2220 | } | |
2221 | ||
2222 | return 0; | |
2223 | ||
2224 | } | |
2225 | ||
7deb2264 TG |
2226 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2227 | struct xfrm_policy *xp) | |
2228 | { | |
2229 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2230 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2231 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) | |
2232 | + userpolicy_type_attrsize(); | |
2233 | } | |
2234 | ||
1da177e4 LT |
2235 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2236 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2237 | int dir) | |
2238 | { | |
2239 | struct xfrm_user_acquire *ua; | |
2240 | struct nlmsghdr *nlh; | |
1da177e4 LT |
2241 | __u32 seq = xfrm_get_acqseq(); |
2242 | ||
79b8b7f4 TG |
2243 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2244 | if (nlh == NULL) | |
2245 | return -EMSGSIZE; | |
1da177e4 | 2246 | |
7b67c857 | 2247 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2248 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2249 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2250 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2251 | copy_to_user_policy(xp, &ua->policy, dir); | |
2252 | ua->aalgos = xt->aalgos; | |
2253 | ua->ealgos = xt->ealgos; | |
2254 | ua->calgos = xt->calgos; | |
2255 | ua->seq = x->km.seq = seq; | |
2256 | ||
2257 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2258 | goto nlmsg_failure; | |
0d681623 | 2259 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2260 | goto nlmsg_failure; |
1459bb36 | 2261 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2262 | goto nlmsg_failure; |
1da177e4 | 2263 | |
9825069d | 2264 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2265 | |
2266 | nlmsg_failure: | |
9825069d TG |
2267 | nlmsg_cancel(skb, nlh); |
2268 | return -EMSGSIZE; | |
1da177e4 LT |
2269 | } |
2270 | ||
2271 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2272 | struct xfrm_policy *xp, int dir) | |
2273 | { | |
a6483b79 | 2274 | struct net *net = xs_net(x); |
1da177e4 | 2275 | struct sk_buff *skb; |
1da177e4 | 2276 | |
7deb2264 | 2277 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2278 | if (skb == NULL) |
2279 | return -ENOMEM; | |
2280 | ||
2281 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2282 | BUG(); | |
2283 | ||
a6483b79 | 2284 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2285 | } |
2286 | ||
2287 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2288 | * or more templates. | |
2289 | */ | |
cb969f07 | 2290 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2291 | u8 *data, int len, int *dir) |
2292 | { | |
fc34acd3 | 2293 | struct net *net = sock_net(sk); |
1da177e4 LT |
2294 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; |
2295 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2296 | struct xfrm_policy *xp; | |
2297 | int nr; | |
2298 | ||
cb969f07 | 2299 | switch (sk->sk_family) { |
1da177e4 LT |
2300 | case AF_INET: |
2301 | if (opt != IP_XFRM_POLICY) { | |
2302 | *dir = -EOPNOTSUPP; | |
2303 | return NULL; | |
2304 | } | |
2305 | break; | |
2306 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2307 | case AF_INET6: | |
2308 | if (opt != IPV6_XFRM_POLICY) { | |
2309 | *dir = -EOPNOTSUPP; | |
2310 | return NULL; | |
2311 | } | |
2312 | break; | |
2313 | #endif | |
2314 | default: | |
2315 | *dir = -EINVAL; | |
2316 | return NULL; | |
2317 | } | |
2318 | ||
2319 | *dir = -EINVAL; | |
2320 | ||
2321 | if (len < sizeof(*p) || | |
2322 | verify_newpolicy_info(p)) | |
2323 | return NULL; | |
2324 | ||
2325 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2326 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2327 | return NULL; |
2328 | ||
a4f1bac6 HX |
2329 | if (p->dir > XFRM_POLICY_OUT) |
2330 | return NULL; | |
2331 | ||
fc34acd3 | 2332 | xp = xfrm_policy_alloc(net, GFP_KERNEL); |
1da177e4 LT |
2333 | if (xp == NULL) { |
2334 | *dir = -ENOBUFS; | |
2335 | return NULL; | |
2336 | } | |
2337 | ||
2338 | copy_from_user_policy(xp, p); | |
f7b6983f | 2339 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2340 | copy_templates(xp, ut, nr); |
2341 | ||
2342 | *dir = p->dir; | |
2343 | ||
2344 | return xp; | |
2345 | } | |
2346 | ||
7deb2264 TG |
2347 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2348 | { | |
2349 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2350 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2351 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
2352 | + userpolicy_type_attrsize(); | |
2353 | } | |
2354 | ||
1da177e4 | 2355 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
d51d081d | 2356 | int dir, struct km_event *c) |
1da177e4 LT |
2357 | { |
2358 | struct xfrm_user_polexpire *upe; | |
2359 | struct nlmsghdr *nlh; | |
d51d081d | 2360 | int hard = c->data.hard; |
1da177e4 | 2361 | |
79b8b7f4 TG |
2362 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2363 | if (nlh == NULL) | |
2364 | return -EMSGSIZE; | |
1da177e4 | 2365 | |
7b67c857 | 2366 | upe = nlmsg_data(nlh); |
1da177e4 LT |
2367 | copy_to_user_policy(xp, &upe->pol, dir); |
2368 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2369 | goto nlmsg_failure; | |
df71837d TJ |
2370 | if (copy_to_user_sec_ctx(xp, skb)) |
2371 | goto nlmsg_failure; | |
1459bb36 | 2372 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2373 | goto nlmsg_failure; |
1da177e4 LT |
2374 | upe->hard = !!hard; |
2375 | ||
9825069d | 2376 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2377 | |
2378 | nlmsg_failure: | |
9825069d TG |
2379 | nlmsg_cancel(skb, nlh); |
2380 | return -EMSGSIZE; | |
1da177e4 LT |
2381 | } |
2382 | ||
26b15dad | 2383 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 | 2384 | { |
fc34acd3 | 2385 | struct net *net = xp_net(xp); |
1da177e4 | 2386 | struct sk_buff *skb; |
1da177e4 | 2387 | |
7deb2264 | 2388 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2389 | if (skb == NULL) |
2390 | return -ENOMEM; | |
2391 | ||
d51d081d | 2392 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2393 | BUG(); |
2394 | ||
a6483b79 | 2395 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2396 | } |
2397 | ||
26b15dad JHS |
2398 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2399 | { | |
fc34acd3 | 2400 | struct net *net = xp_net(xp); |
26b15dad | 2401 | struct xfrm_userpolicy_info *p; |
0603eac0 | 2402 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2403 | struct nlmsghdr *nlh; |
2404 | struct sk_buff *skb; | |
7deb2264 | 2405 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2406 | int headlen; |
2407 | ||
2408 | headlen = sizeof(*p); | |
2409 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2410 | len += nla_total_size(headlen); |
0603eac0 HX |
2411 | headlen = sizeof(*id); |
2412 | } | |
cfbfd45a | 2413 | len += userpolicy_type_attrsize(); |
7deb2264 | 2414 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2415 | |
7deb2264 | 2416 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2417 | if (skb == NULL) |
2418 | return -ENOMEM; | |
26b15dad | 2419 | |
79b8b7f4 TG |
2420 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2421 | if (nlh == NULL) | |
2422 | goto nlmsg_failure; | |
26b15dad | 2423 | |
7b67c857 | 2424 | p = nlmsg_data(nlh); |
0603eac0 | 2425 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2426 | struct nlattr *attr; |
2427 | ||
7b67c857 | 2428 | id = nlmsg_data(nlh); |
0603eac0 HX |
2429 | memset(id, 0, sizeof(*id)); |
2430 | id->dir = dir; | |
2431 | if (c->data.byid) | |
2432 | id->index = xp->index; | |
2433 | else | |
2434 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2435 | ||
c0144bea TG |
2436 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
2437 | if (attr == NULL) | |
2438 | goto nlmsg_failure; | |
2439 | ||
2440 | p = nla_data(attr); | |
0603eac0 | 2441 | } |
26b15dad | 2442 | |
26b15dad JHS |
2443 | copy_to_user_policy(xp, p, dir); |
2444 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2445 | goto nlmsg_failure; | |
1459bb36 | 2446 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2447 | goto nlmsg_failure; |
26b15dad | 2448 | |
9825069d | 2449 | nlmsg_end(skb, nlh); |
26b15dad | 2450 | |
a6483b79 | 2451 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2452 | |
2453 | nlmsg_failure: | |
2454 | kfree_skb(skb); | |
2455 | return -1; | |
2456 | } | |
2457 | ||
2458 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2459 | { | |
7067802e | 2460 | struct net *net = c->net; |
26b15dad JHS |
2461 | struct nlmsghdr *nlh; |
2462 | struct sk_buff *skb; | |
26b15dad | 2463 | |
7deb2264 | 2464 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2465 | if (skb == NULL) |
2466 | return -ENOMEM; | |
26b15dad | 2467 | |
79b8b7f4 TG |
2468 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
2469 | if (nlh == NULL) | |
2470 | goto nlmsg_failure; | |
0c51f53c JHS |
2471 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2472 | goto nlmsg_failure; | |
26b15dad | 2473 | |
9825069d | 2474 | nlmsg_end(skb, nlh); |
26b15dad | 2475 | |
a6483b79 | 2476 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2477 | |
2478 | nlmsg_failure: | |
2479 | kfree_skb(skb); | |
2480 | return -1; | |
2481 | } | |
2482 | ||
2483 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2484 | { | |
2485 | ||
2486 | switch (c->event) { | |
f60f6b8f HX |
2487 | case XFRM_MSG_NEWPOLICY: |
2488 | case XFRM_MSG_UPDPOLICY: | |
2489 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2490 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2491 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2492 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2493 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2494 | return xfrm_exp_policy_notify(xp, dir, c); |
2495 | default: | |
2496 | printk("xfrm_user: Unknown Policy event %d\n", c->event); | |
2497 | } | |
2498 | ||
2499 | return 0; | |
2500 | ||
2501 | } | |
2502 | ||
7deb2264 TG |
2503 | static inline size_t xfrm_report_msgsize(void) |
2504 | { | |
2505 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2506 | } | |
2507 | ||
97a64b45 MN |
2508 | static int build_report(struct sk_buff *skb, u8 proto, |
2509 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2510 | { | |
2511 | struct xfrm_user_report *ur; | |
2512 | struct nlmsghdr *nlh; | |
97a64b45 | 2513 | |
79b8b7f4 TG |
2514 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2515 | if (nlh == NULL) | |
2516 | return -EMSGSIZE; | |
97a64b45 | 2517 | |
7b67c857 | 2518 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2519 | ur->proto = proto; |
2520 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2521 | ||
2522 | if (addr) | |
c0144bea | 2523 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); |
97a64b45 | 2524 | |
9825069d | 2525 | return nlmsg_end(skb, nlh); |
97a64b45 | 2526 | |
c0144bea | 2527 | nla_put_failure: |
9825069d TG |
2528 | nlmsg_cancel(skb, nlh); |
2529 | return -EMSGSIZE; | |
97a64b45 MN |
2530 | } |
2531 | ||
db983c11 AD |
2532 | static int xfrm_send_report(struct net *net, u8 proto, |
2533 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
97a64b45 MN |
2534 | { |
2535 | struct sk_buff *skb; | |
97a64b45 | 2536 | |
7deb2264 | 2537 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2538 | if (skb == NULL) |
2539 | return -ENOMEM; | |
2540 | ||
2541 | if (build_report(skb, proto, sel, addr) < 0) | |
2542 | BUG(); | |
2543 | ||
a6483b79 | 2544 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2545 | } |
2546 | ||
3a2dfbe8 MW |
2547 | static inline size_t xfrm_mapping_msgsize(void) |
2548 | { | |
2549 | return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); | |
2550 | } | |
2551 | ||
2552 | static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, | |
2553 | xfrm_address_t *new_saddr, __be16 new_sport) | |
2554 | { | |
2555 | struct xfrm_user_mapping *um; | |
2556 | struct nlmsghdr *nlh; | |
2557 | ||
2558 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); | |
2559 | if (nlh == NULL) | |
2560 | return -EMSGSIZE; | |
2561 | ||
2562 | um = nlmsg_data(nlh); | |
2563 | ||
2564 | memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); | |
2565 | um->id.spi = x->id.spi; | |
2566 | um->id.family = x->props.family; | |
2567 | um->id.proto = x->id.proto; | |
2568 | memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); | |
2569 | memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); | |
2570 | um->new_sport = new_sport; | |
2571 | um->old_sport = x->encap->encap_sport; | |
2572 | um->reqid = x->props.reqid; | |
2573 | ||
2574 | return nlmsg_end(skb, nlh); | |
2575 | } | |
2576 | ||
2577 | static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, | |
2578 | __be16 sport) | |
2579 | { | |
a6483b79 | 2580 | struct net *net = xs_net(x); |
3a2dfbe8 MW |
2581 | struct sk_buff *skb; |
2582 | ||
2583 | if (x->id.proto != IPPROTO_ESP) | |
2584 | return -EINVAL; | |
2585 | ||
2586 | if (!x->encap) | |
2587 | return -EINVAL; | |
2588 | ||
2589 | skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); | |
2590 | if (skb == NULL) | |
2591 | return -ENOMEM; | |
2592 | ||
2593 | if (build_mapping(skb, x, ipaddr, sport) < 0) | |
2594 | BUG(); | |
2595 | ||
a6483b79 | 2596 | return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); |
3a2dfbe8 MW |
2597 | } |
2598 | ||
1da177e4 LT |
2599 | static struct xfrm_mgr netlink_mgr = { |
2600 | .id = "netlink", | |
2601 | .notify = xfrm_send_state_notify, | |
2602 | .acquire = xfrm_send_acquire, | |
2603 | .compile_policy = xfrm_compile_policy, | |
2604 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2605 | .report = xfrm_send_report, |
5c79de6e | 2606 | .migrate = xfrm_send_migrate, |
3a2dfbe8 | 2607 | .new_mapping = xfrm_send_mapping, |
1da177e4 LT |
2608 | }; |
2609 | ||
a6483b79 | 2610 | static int __net_init xfrm_user_net_init(struct net *net) |
1da177e4 | 2611 | { |
be33690d PM |
2612 | struct sock *nlsk; |
2613 | ||
a6483b79 | 2614 | nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2615 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2616 | if (nlsk == NULL) |
1da177e4 | 2617 | return -ENOMEM; |
a6483b79 | 2618 | rcu_assign_pointer(net->xfrm.nlsk, nlsk); |
1da177e4 LT |
2619 | return 0; |
2620 | } | |
2621 | ||
a6483b79 | 2622 | static void __net_exit xfrm_user_net_exit(struct net *net) |
1da177e4 | 2623 | { |
a6483b79 | 2624 | struct sock *nlsk = net->xfrm.nlsk; |
be33690d | 2625 | |
a6483b79 | 2626 | rcu_assign_pointer(net->xfrm.nlsk, NULL); |
be33690d | 2627 | synchronize_rcu(); |
b7c6ba6e | 2628 | netlink_kernel_release(nlsk); |
1da177e4 LT |
2629 | } |
2630 | ||
a6483b79 AD |
2631 | static struct pernet_operations xfrm_user_net_ops = { |
2632 | .init = xfrm_user_net_init, | |
2633 | .exit = xfrm_user_net_exit, | |
2634 | }; | |
2635 | ||
2636 | static int __init xfrm_user_init(void) | |
2637 | { | |
2638 | int rv; | |
2639 | ||
2640 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); | |
2641 | ||
2642 | rv = register_pernet_subsys(&xfrm_user_net_ops); | |
2643 | if (rv < 0) | |
2644 | return rv; | |
2645 | rv = xfrm_register_km(&netlink_mgr); | |
2646 | if (rv < 0) | |
2647 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2648 | return rv; | |
2649 | } | |
2650 | ||
2651 | static void __exit xfrm_user_exit(void) | |
2652 | { | |
2653 | xfrm_unregister_km(&netlink_mgr); | |
2654 | unregister_pernet_subsys(&xfrm_user_net_ops); | |
2655 | } | |
2656 | ||
1da177e4 LT |
2657 | module_init(xfrm_user_init); |
2658 | module_exit(xfrm_user_exit); | |
2659 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2660 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2661 |