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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 | |
161a09e7 | 33 | #include <linux/audit.h> |
1da177e4 | 34 | |
c26445ac TG |
35 | static inline int alg_len(struct xfrm_algo *alg) |
36 | { | |
37 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
38 | } | |
39 | ||
5424f32e | 40 | static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) |
1da177e4 | 41 | { |
5424f32e | 42 | struct nlattr *rt = attrs[type]; |
1da177e4 LT |
43 | struct xfrm_algo *algp; |
44 | ||
45 | if (!rt) | |
46 | return 0; | |
47 | ||
5424f32e TG |
48 | algp = nla_data(rt); |
49 | if (nla_len(rt) < alg_len(algp)) | |
31c26852 HX |
50 | return -EINVAL; |
51 | ||
1da177e4 LT |
52 | switch (type) { |
53 | case XFRMA_ALG_AUTH: | |
54 | if (!algp->alg_key_len && | |
55 | strcmp(algp->alg_name, "digest_null") != 0) | |
56 | return -EINVAL; | |
57 | break; | |
58 | ||
59 | case XFRMA_ALG_CRYPT: | |
60 | if (!algp->alg_key_len && | |
61 | strcmp(algp->alg_name, "cipher_null") != 0) | |
62 | return -EINVAL; | |
63 | break; | |
64 | ||
65 | case XFRMA_ALG_COMP: | |
66 | /* Zero length keys are legal. */ | |
67 | break; | |
68 | ||
69 | default: | |
70 | return -EINVAL; | |
3ff50b79 | 71 | } |
1da177e4 LT |
72 | |
73 | algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; | |
74 | return 0; | |
75 | } | |
76 | ||
5424f32e | 77 | static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, |
eb2971b6 MN |
78 | xfrm_address_t **addrp) |
79 | { | |
5424f32e | 80 | struct nlattr *rt = attrs[type]; |
eb2971b6 | 81 | |
cf5cb79f | 82 | if (rt && addrp) |
5424f32e | 83 | *addrp = nla_data(rt); |
eb2971b6 | 84 | } |
df71837d | 85 | |
5424f32e | 86 | static inline int verify_sec_ctx_len(struct nlattr **attrs) |
df71837d | 87 | { |
5424f32e | 88 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d | 89 | struct xfrm_user_sec_ctx *uctx; |
df71837d TJ |
90 | |
91 | if (!rt) | |
92 | return 0; | |
93 | ||
5424f32e | 94 | uctx = nla_data(rt); |
cf5cb79f | 95 | if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) |
df71837d TJ |
96 | return -EINVAL; |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | ||
1da177e4 | 102 | static int verify_newsa_info(struct xfrm_usersa_info *p, |
5424f32e | 103 | struct nlattr **attrs) |
1da177e4 LT |
104 | { |
105 | int err; | |
106 | ||
107 | err = -EINVAL; | |
108 | switch (p->family) { | |
109 | case AF_INET: | |
110 | break; | |
111 | ||
112 | case AF_INET6: | |
113 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
114 | break; | |
115 | #else | |
116 | err = -EAFNOSUPPORT; | |
117 | goto out; | |
118 | #endif | |
119 | ||
120 | default: | |
121 | goto out; | |
3ff50b79 | 122 | } |
1da177e4 LT |
123 | |
124 | err = -EINVAL; | |
125 | switch (p->id.proto) { | |
126 | case IPPROTO_AH: | |
35a7aa08 TG |
127 | if (!attrs[XFRMA_ALG_AUTH] || |
128 | attrs[XFRMA_ALG_CRYPT] || | |
129 | attrs[XFRMA_ALG_COMP]) | |
1da177e4 LT |
130 | goto out; |
131 | break; | |
132 | ||
133 | case IPPROTO_ESP: | |
35a7aa08 TG |
134 | if ((!attrs[XFRMA_ALG_AUTH] && |
135 | !attrs[XFRMA_ALG_CRYPT]) || | |
136 | attrs[XFRMA_ALG_COMP]) | |
1da177e4 LT |
137 | goto out; |
138 | break; | |
139 | ||
140 | case IPPROTO_COMP: | |
35a7aa08 TG |
141 | if (!attrs[XFRMA_ALG_COMP] || |
142 | attrs[XFRMA_ALG_AUTH] || | |
143 | attrs[XFRMA_ALG_CRYPT]) | |
1da177e4 LT |
144 | goto out; |
145 | break; | |
146 | ||
e23c7194 MN |
147 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
148 | case IPPROTO_DSTOPTS: | |
149 | case IPPROTO_ROUTING: | |
35a7aa08 TG |
150 | if (attrs[XFRMA_ALG_COMP] || |
151 | attrs[XFRMA_ALG_AUTH] || | |
152 | attrs[XFRMA_ALG_CRYPT] || | |
153 | attrs[XFRMA_ENCAP] || | |
154 | attrs[XFRMA_SEC_CTX] || | |
155 | !attrs[XFRMA_COADDR]) | |
e23c7194 MN |
156 | goto out; |
157 | break; | |
158 | #endif | |
159 | ||
1da177e4 LT |
160 | default: |
161 | goto out; | |
3ff50b79 | 162 | } |
1da177e4 | 163 | |
35a7aa08 | 164 | if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) |
1da177e4 | 165 | goto out; |
35a7aa08 | 166 | if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) |
1da177e4 | 167 | goto out; |
35a7aa08 | 168 | if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) |
1da177e4 | 169 | goto out; |
35a7aa08 | 170 | if ((err = verify_sec_ctx_len(attrs))) |
df71837d | 171 | goto out; |
1da177e4 LT |
172 | |
173 | err = -EINVAL; | |
174 | switch (p->mode) { | |
7e49e6de MN |
175 | case XFRM_MODE_TRANSPORT: |
176 | case XFRM_MODE_TUNNEL: | |
060f02a3 | 177 | case XFRM_MODE_ROUTEOPTIMIZATION: |
0a69452c | 178 | case XFRM_MODE_BEET: |
1da177e4 LT |
179 | break; |
180 | ||
181 | default: | |
182 | goto out; | |
3ff50b79 | 183 | } |
1da177e4 LT |
184 | |
185 | err = 0; | |
186 | ||
187 | out: | |
188 | return err; | |
189 | } | |
190 | ||
191 | static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, | |
192 | struct xfrm_algo_desc *(*get_byname)(char *, int), | |
5424f32e | 193 | struct nlattr *rta) |
1da177e4 | 194 | { |
1da177e4 LT |
195 | struct xfrm_algo *p, *ualg; |
196 | struct xfrm_algo_desc *algo; | |
197 | ||
198 | if (!rta) | |
199 | return 0; | |
200 | ||
5424f32e | 201 | ualg = nla_data(rta); |
1da177e4 LT |
202 | |
203 | algo = get_byname(ualg->alg_name, 1); | |
204 | if (!algo) | |
205 | return -ENOSYS; | |
206 | *props = algo->desc.sadb_alg_id; | |
207 | ||
c26445ac | 208 | p = kmemdup(ualg, alg_len(ualg), GFP_KERNEL); |
1da177e4 LT |
209 | if (!p) |
210 | return -ENOMEM; | |
211 | ||
04ff1260 | 212 | strcpy(p->alg_name, algo->name); |
1da177e4 LT |
213 | *algpp = p; |
214 | return 0; | |
215 | } | |
216 | ||
5424f32e | 217 | static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct nlattr *rta) |
1da177e4 | 218 | { |
1da177e4 LT |
219 | struct xfrm_encap_tmpl *p, *uencap; |
220 | ||
221 | if (!rta) | |
222 | return 0; | |
223 | ||
5424f32e | 224 | uencap = nla_data(rta); |
cdbc6dae | 225 | p = kmemdup(uencap, sizeof(*p), GFP_KERNEL); |
1da177e4 LT |
226 | if (!p) |
227 | return -ENOMEM; | |
228 | ||
1da177e4 LT |
229 | *encapp = p; |
230 | return 0; | |
231 | } | |
232 | ||
df71837d | 233 | |
661697f7 | 234 | static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) |
df71837d | 235 | { |
df71837d TJ |
236 | int len = 0; |
237 | ||
238 | if (xfrm_ctx) { | |
239 | len += sizeof(struct xfrm_user_sec_ctx); | |
240 | len += xfrm_ctx->ctx_len; | |
241 | } | |
242 | return len; | |
243 | } | |
244 | ||
5424f32e | 245 | static int attach_sec_ctx(struct xfrm_state *x, struct nlattr *u_arg) |
df71837d TJ |
246 | { |
247 | struct xfrm_user_sec_ctx *uctx; | |
248 | ||
249 | if (!u_arg) | |
250 | return 0; | |
251 | ||
5424f32e | 252 | uctx = nla_data(u_arg); |
df71837d TJ |
253 | return security_xfrm_state_alloc(x, uctx); |
254 | } | |
255 | ||
5424f32e | 256 | static int attach_one_addr(xfrm_address_t **addrpp, struct nlattr *rta) |
060f02a3 | 257 | { |
060f02a3 NT |
258 | xfrm_address_t *p, *uaddrp; |
259 | ||
260 | if (!rta) | |
261 | return 0; | |
262 | ||
5424f32e | 263 | uaddrp = nla_data(rta); |
cdbc6dae | 264 | p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL); |
060f02a3 NT |
265 | if (!p) |
266 | return -ENOMEM; | |
267 | ||
060f02a3 NT |
268 | *addrpp = p; |
269 | return 0; | |
270 | } | |
271 | ||
1da177e4 LT |
272 | static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) |
273 | { | |
274 | memcpy(&x->id, &p->id, sizeof(x->id)); | |
275 | memcpy(&x->sel, &p->sel, sizeof(x->sel)); | |
276 | memcpy(&x->lft, &p->lft, sizeof(x->lft)); | |
277 | x->props.mode = p->mode; | |
278 | x->props.replay_window = p->replay_window; | |
279 | x->props.reqid = p->reqid; | |
280 | x->props.family = p->family; | |
54489c14 | 281 | memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); |
1da177e4 | 282 | x->props.flags = p->flags; |
196b0036 HX |
283 | |
284 | /* | |
285 | * Set inner address family if the KM left it as zero. | |
286 | * See comment in validate_tmpl. | |
287 | */ | |
288 | if (!x->sel.family) | |
289 | x->sel.family = p->family; | |
1da177e4 LT |
290 | } |
291 | ||
d51d081d JHS |
292 | /* |
293 | * someday when pfkey also has support, we could have the code | |
294 | * somehow made shareable and move it to xfrm_state.c - JHS | |
295 | * | |
296 | */ | |
5424f32e | 297 | static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) |
d51d081d | 298 | { |
5424f32e TG |
299 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
300 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
301 | struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; | |
302 | struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; | |
d51d081d JHS |
303 | |
304 | if (rp) { | |
305 | struct xfrm_replay_state *replay; | |
5424f32e | 306 | replay = nla_data(rp); |
d51d081d JHS |
307 | memcpy(&x->replay, replay, sizeof(*replay)); |
308 | memcpy(&x->preplay, replay, sizeof(*replay)); | |
309 | } | |
310 | ||
311 | if (lt) { | |
312 | struct xfrm_lifetime_cur *ltime; | |
5424f32e | 313 | ltime = nla_data(lt); |
d51d081d JHS |
314 | x->curlft.bytes = ltime->bytes; |
315 | x->curlft.packets = ltime->packets; | |
316 | x->curlft.add_time = ltime->add_time; | |
317 | x->curlft.use_time = ltime->use_time; | |
318 | } | |
319 | ||
cf5cb79f | 320 | if (et) |
5424f32e | 321 | x->replay_maxage = nla_get_u32(et); |
d51d081d | 322 | |
cf5cb79f | 323 | if (rt) |
5424f32e | 324 | x->replay_maxdiff = nla_get_u32(rt); |
d51d081d JHS |
325 | } |
326 | ||
1da177e4 | 327 | static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, |
5424f32e | 328 | struct nlattr **attrs, |
1da177e4 LT |
329 | int *errp) |
330 | { | |
331 | struct xfrm_state *x = xfrm_state_alloc(); | |
332 | int err = -ENOMEM; | |
333 | ||
334 | if (!x) | |
335 | goto error_no_put; | |
336 | ||
337 | copy_from_user_state(x, p); | |
338 | ||
339 | if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, | |
340 | xfrm_aalg_get_byname, | |
35a7aa08 | 341 | attrs[XFRMA_ALG_AUTH]))) |
1da177e4 LT |
342 | goto error; |
343 | if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, | |
344 | xfrm_ealg_get_byname, | |
35a7aa08 | 345 | attrs[XFRMA_ALG_CRYPT]))) |
1da177e4 LT |
346 | goto error; |
347 | if ((err = attach_one_algo(&x->calg, &x->props.calgo, | |
348 | xfrm_calg_get_byname, | |
35a7aa08 | 349 | attrs[XFRMA_ALG_COMP]))) |
1da177e4 | 350 | goto error; |
35a7aa08 | 351 | if ((err = attach_encap_tmpl(&x->encap, attrs[XFRMA_ENCAP]))) |
1da177e4 | 352 | goto error; |
35a7aa08 | 353 | if ((err = attach_one_addr(&x->coaddr, attrs[XFRMA_COADDR]))) |
060f02a3 | 354 | goto error; |
72cb6962 | 355 | err = xfrm_init_state(x); |
1da177e4 LT |
356 | if (err) |
357 | goto error; | |
358 | ||
35a7aa08 | 359 | if ((err = attach_sec_ctx(x, attrs[XFRMA_SEC_CTX]))) |
df71837d TJ |
360 | goto error; |
361 | ||
1da177e4 | 362 | x->km.seq = p->seq; |
d51d081d JHS |
363 | x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; |
364 | /* sysctl_xfrm_aevent_etime is in 100ms units */ | |
365 | x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; | |
366 | x->preplay.bitmap = 0; | |
367 | x->preplay.seq = x->replay.seq+x->replay_maxdiff; | |
368 | x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; | |
369 | ||
370 | /* override default values from above */ | |
371 | ||
5424f32e | 372 | xfrm_update_ae_params(x, attrs); |
1da177e4 LT |
373 | |
374 | return x; | |
375 | ||
376 | error: | |
377 | x->km.state = XFRM_STATE_DEAD; | |
378 | xfrm_state_put(x); | |
379 | error_no_put: | |
380 | *errp = err; | |
381 | return NULL; | |
382 | } | |
383 | ||
22e70050 | 384 | static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 385 | struct nlattr **attrs) |
1da177e4 | 386 | { |
7b67c857 | 387 | struct xfrm_usersa_info *p = nlmsg_data(nlh); |
1da177e4 LT |
388 | struct xfrm_state *x; |
389 | int err; | |
26b15dad | 390 | struct km_event c; |
1da177e4 | 391 | |
35a7aa08 | 392 | err = verify_newsa_info(p, attrs); |
1da177e4 LT |
393 | if (err) |
394 | return err; | |
395 | ||
35a7aa08 | 396 | x = xfrm_state_construct(p, attrs, &err); |
1da177e4 LT |
397 | if (!x) |
398 | return err; | |
399 | ||
26b15dad | 400 | xfrm_state_hold(x); |
1da177e4 LT |
401 | if (nlh->nlmsg_type == XFRM_MSG_NEWSA) |
402 | err = xfrm_state_add(x); | |
403 | else | |
404 | err = xfrm_state_update(x); | |
405 | ||
161a09e7 JL |
406 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
407 | AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x); | |
408 | ||
1da177e4 LT |
409 | if (err < 0) { |
410 | x->km.state = XFRM_STATE_DEAD; | |
21380b81 | 411 | __xfrm_state_put(x); |
7d6dfe1f | 412 | goto out; |
1da177e4 LT |
413 | } |
414 | ||
26b15dad JHS |
415 | c.seq = nlh->nlmsg_seq; |
416 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 417 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
418 | |
419 | km_state_notify(x, &c); | |
7d6dfe1f | 420 | out: |
26b15dad | 421 | xfrm_state_put(x); |
1da177e4 LT |
422 | return err; |
423 | } | |
424 | ||
eb2971b6 | 425 | static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, |
5424f32e | 426 | struct nlattr **attrs, |
eb2971b6 MN |
427 | int *errp) |
428 | { | |
429 | struct xfrm_state *x = NULL; | |
430 | int err; | |
431 | ||
432 | if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { | |
433 | err = -ESRCH; | |
434 | x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); | |
435 | } else { | |
436 | xfrm_address_t *saddr = NULL; | |
437 | ||
35a7aa08 | 438 | verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); |
eb2971b6 MN |
439 | if (!saddr) { |
440 | err = -EINVAL; | |
441 | goto out; | |
442 | } | |
443 | ||
9abbffee | 444 | err = -ESRCH; |
eb2971b6 MN |
445 | x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto, |
446 | p->family); | |
447 | } | |
448 | ||
449 | out: | |
450 | if (!x && errp) | |
451 | *errp = err; | |
452 | return x; | |
453 | } | |
454 | ||
22e70050 | 455 | static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 456 | struct nlattr **attrs) |
1da177e4 LT |
457 | { |
458 | struct xfrm_state *x; | |
eb2971b6 | 459 | int err = -ESRCH; |
26b15dad | 460 | struct km_event c; |
7b67c857 | 461 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 | 462 | |
35a7aa08 | 463 | x = xfrm_user_state_lookup(p, attrs, &err); |
1da177e4 | 464 | if (x == NULL) |
eb2971b6 | 465 | return err; |
1da177e4 | 466 | |
6f68dc37 | 467 | if ((err = security_xfrm_state_delete(x)) != 0) |
c8c05a8e CZ |
468 | goto out; |
469 | ||
1da177e4 | 470 | if (xfrm_state_kern(x)) { |
c8c05a8e CZ |
471 | err = -EPERM; |
472 | goto out; | |
1da177e4 LT |
473 | } |
474 | ||
26b15dad | 475 | err = xfrm_state_delete(x); |
161a09e7 | 476 | |
c8c05a8e CZ |
477 | if (err < 0) |
478 | goto out; | |
26b15dad JHS |
479 | |
480 | c.seq = nlh->nlmsg_seq; | |
481 | c.pid = nlh->nlmsg_pid; | |
f60f6b8f | 482 | c.event = nlh->nlmsg_type; |
26b15dad | 483 | km_state_notify(x, &c); |
1da177e4 | 484 | |
c8c05a8e | 485 | out: |
16bec31d EP |
486 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
487 | AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x); | |
c8c05a8e | 488 | xfrm_state_put(x); |
26b15dad | 489 | return err; |
1da177e4 LT |
490 | } |
491 | ||
492 | static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) | |
493 | { | |
494 | memcpy(&p->id, &x->id, sizeof(p->id)); | |
495 | memcpy(&p->sel, &x->sel, sizeof(p->sel)); | |
496 | memcpy(&p->lft, &x->lft, sizeof(p->lft)); | |
497 | memcpy(&p->curlft, &x->curlft, sizeof(p->curlft)); | |
498 | memcpy(&p->stats, &x->stats, sizeof(p->stats)); | |
54489c14 | 499 | memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr)); |
1da177e4 LT |
500 | p->mode = x->props.mode; |
501 | p->replay_window = x->props.replay_window; | |
502 | p->reqid = x->props.reqid; | |
503 | p->family = x->props.family; | |
504 | p->flags = x->props.flags; | |
505 | p->seq = x->km.seq; | |
506 | } | |
507 | ||
508 | struct xfrm_dump_info { | |
509 | struct sk_buff *in_skb; | |
510 | struct sk_buff *out_skb; | |
511 | u32 nlmsg_seq; | |
512 | u16 nlmsg_flags; | |
513 | int start_idx; | |
514 | int this_idx; | |
515 | }; | |
516 | ||
c0144bea TG |
517 | static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) |
518 | { | |
519 | int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len; | |
520 | struct xfrm_user_sec_ctx *uctx; | |
521 | struct nlattr *attr; | |
522 | ||
523 | attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); | |
524 | if (attr == NULL) | |
525 | return -EMSGSIZE; | |
526 | ||
527 | uctx = nla_data(attr); | |
528 | uctx->exttype = XFRMA_SEC_CTX; | |
529 | uctx->len = ctx_size; | |
530 | uctx->ctx_doi = s->ctx_doi; | |
531 | uctx->ctx_alg = s->ctx_alg; | |
532 | uctx->ctx_len = s->ctx_len; | |
533 | memcpy(uctx + 1, s->ctx_str, s->ctx_len); | |
534 | ||
535 | return 0; | |
536 | } | |
537 | ||
1da177e4 LT |
538 | static int dump_one_state(struct xfrm_state *x, int count, void *ptr) |
539 | { | |
540 | struct xfrm_dump_info *sp = ptr; | |
541 | struct sk_buff *in_skb = sp->in_skb; | |
542 | struct sk_buff *skb = sp->out_skb; | |
543 | struct xfrm_usersa_info *p; | |
544 | struct nlmsghdr *nlh; | |
1da177e4 LT |
545 | |
546 | if (sp->this_idx < sp->start_idx) | |
547 | goto out; | |
548 | ||
79b8b7f4 TG |
549 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
550 | XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); | |
551 | if (nlh == NULL) | |
552 | return -EMSGSIZE; | |
1da177e4 | 553 | |
7b67c857 | 554 | p = nlmsg_data(nlh); |
1da177e4 LT |
555 | copy_to_user_state(x, p); |
556 | ||
557 | if (x->aalg) | |
c26445ac | 558 | NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg); |
1da177e4 | 559 | if (x->ealg) |
c26445ac | 560 | NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg); |
1da177e4 | 561 | if (x->calg) |
c0144bea | 562 | NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
1da177e4 LT |
563 | |
564 | if (x->encap) | |
c0144bea | 565 | NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
1da177e4 | 566 | |
c0144bea TG |
567 | if (x->security && copy_sec_ctx(x->security, skb) < 0) |
568 | goto nla_put_failure; | |
060f02a3 NT |
569 | |
570 | if (x->coaddr) | |
c0144bea | 571 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); |
060f02a3 | 572 | |
9afaca05 | 573 | if (x->lastused) |
c0144bea | 574 | NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); |
9afaca05 | 575 | |
9825069d | 576 | nlmsg_end(skb, nlh); |
1da177e4 LT |
577 | out: |
578 | sp->this_idx++; | |
579 | return 0; | |
580 | ||
c0144bea | 581 | nla_put_failure: |
9825069d TG |
582 | nlmsg_cancel(skb, nlh); |
583 | return -EMSGSIZE; | |
1da177e4 LT |
584 | } |
585 | ||
586 | static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) | |
587 | { | |
588 | struct xfrm_dump_info info; | |
589 | ||
590 | info.in_skb = cb->skb; | |
591 | info.out_skb = skb; | |
592 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
593 | info.nlmsg_flags = NLM_F_MULTI; | |
594 | info.this_idx = 0; | |
595 | info.start_idx = cb->args[0]; | |
dc00a525 | 596 | (void) xfrm_state_walk(0, dump_one_state, &info); |
1da177e4 LT |
597 | cb->args[0] = info.this_idx; |
598 | ||
599 | return skb->len; | |
600 | } | |
601 | ||
602 | static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, | |
603 | struct xfrm_state *x, u32 seq) | |
604 | { | |
605 | struct xfrm_dump_info info; | |
606 | struct sk_buff *skb; | |
607 | ||
7deb2264 | 608 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
1da177e4 LT |
609 | if (!skb) |
610 | return ERR_PTR(-ENOMEM); | |
611 | ||
1da177e4 LT |
612 | info.in_skb = in_skb; |
613 | info.out_skb = skb; | |
614 | info.nlmsg_seq = seq; | |
615 | info.nlmsg_flags = 0; | |
616 | info.this_idx = info.start_idx = 0; | |
617 | ||
618 | if (dump_one_state(x, 0, &info)) { | |
619 | kfree_skb(skb); | |
620 | return NULL; | |
621 | } | |
622 | ||
623 | return skb; | |
624 | } | |
625 | ||
7deb2264 TG |
626 | static inline size_t xfrm_spdinfo_msgsize(void) |
627 | { | |
628 | return NLMSG_ALIGN(4) | |
629 | + nla_total_size(sizeof(struct xfrmu_spdinfo)) | |
630 | + nla_total_size(sizeof(struct xfrmu_spdhinfo)); | |
631 | } | |
632 | ||
ecfd6b18 JHS |
633 | static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
634 | { | |
5a6d3416 JHS |
635 | struct xfrmk_spdinfo si; |
636 | struct xfrmu_spdinfo spc; | |
637 | struct xfrmu_spdhinfo sph; | |
ecfd6b18 JHS |
638 | struct nlmsghdr *nlh; |
639 | u32 *f; | |
640 | ||
641 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); | |
642 | if (nlh == NULL) /* shouldnt really happen ... */ | |
643 | return -EMSGSIZE; | |
644 | ||
645 | f = nlmsg_data(nlh); | |
646 | *f = flags; | |
647 | xfrm_spd_getinfo(&si); | |
5a6d3416 JHS |
648 | spc.incnt = si.incnt; |
649 | spc.outcnt = si.outcnt; | |
650 | spc.fwdcnt = si.fwdcnt; | |
651 | spc.inscnt = si.inscnt; | |
652 | spc.outscnt = si.outscnt; | |
653 | spc.fwdscnt = si.fwdscnt; | |
654 | sph.spdhcnt = si.spdhcnt; | |
655 | sph.spdhmcnt = si.spdhmcnt; | |
656 | ||
657 | NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); | |
658 | NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); | |
ecfd6b18 JHS |
659 | |
660 | return nlmsg_end(skb, nlh); | |
661 | ||
662 | nla_put_failure: | |
663 | nlmsg_cancel(skb, nlh); | |
664 | return -EMSGSIZE; | |
665 | } | |
666 | ||
667 | static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 668 | struct nlattr **attrs) |
ecfd6b18 JHS |
669 | { |
670 | struct sk_buff *r_skb; | |
7b67c857 | 671 | u32 *flags = nlmsg_data(nlh); |
ecfd6b18 JHS |
672 | u32 spid = NETLINK_CB(skb).pid; |
673 | u32 seq = nlh->nlmsg_seq; | |
ecfd6b18 | 674 | |
7deb2264 | 675 | r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); |
ecfd6b18 JHS |
676 | if (r_skb == NULL) |
677 | return -ENOMEM; | |
678 | ||
679 | if (build_spdinfo(r_skb, spid, seq, *flags) < 0) | |
680 | BUG(); | |
681 | ||
682 | return nlmsg_unicast(xfrm_nl, r_skb, spid); | |
683 | } | |
684 | ||
7deb2264 TG |
685 | static inline size_t xfrm_sadinfo_msgsize(void) |
686 | { | |
687 | return NLMSG_ALIGN(4) | |
688 | + nla_total_size(sizeof(struct xfrmu_sadhinfo)) | |
689 | + nla_total_size(4); /* XFRMA_SAD_CNT */ | |
690 | } | |
691 | ||
28d8909b JHS |
692 | static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) |
693 | { | |
af11e316 JHS |
694 | struct xfrmk_sadinfo si; |
695 | struct xfrmu_sadhinfo sh; | |
28d8909b JHS |
696 | struct nlmsghdr *nlh; |
697 | u32 *f; | |
698 | ||
699 | nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); | |
700 | if (nlh == NULL) /* shouldnt really happen ... */ | |
701 | return -EMSGSIZE; | |
702 | ||
703 | f = nlmsg_data(nlh); | |
704 | *f = flags; | |
705 | xfrm_sad_getinfo(&si); | |
706 | ||
af11e316 JHS |
707 | sh.sadhmcnt = si.sadhmcnt; |
708 | sh.sadhcnt = si.sadhcnt; | |
709 | ||
710 | NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); | |
711 | NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); | |
28d8909b JHS |
712 | |
713 | return nlmsg_end(skb, nlh); | |
714 | ||
715 | nla_put_failure: | |
716 | nlmsg_cancel(skb, nlh); | |
717 | return -EMSGSIZE; | |
718 | } | |
719 | ||
720 | static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 721 | struct nlattr **attrs) |
28d8909b JHS |
722 | { |
723 | struct sk_buff *r_skb; | |
7b67c857 | 724 | u32 *flags = nlmsg_data(nlh); |
28d8909b JHS |
725 | u32 spid = NETLINK_CB(skb).pid; |
726 | u32 seq = nlh->nlmsg_seq; | |
28d8909b | 727 | |
7deb2264 | 728 | r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); |
28d8909b JHS |
729 | if (r_skb == NULL) |
730 | return -ENOMEM; | |
731 | ||
732 | if (build_sadinfo(r_skb, spid, seq, *flags) < 0) | |
733 | BUG(); | |
734 | ||
735 | return nlmsg_unicast(xfrm_nl, r_skb, spid); | |
736 | } | |
737 | ||
22e70050 | 738 | static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 739 | struct nlattr **attrs) |
1da177e4 | 740 | { |
7b67c857 | 741 | struct xfrm_usersa_id *p = nlmsg_data(nlh); |
1da177e4 LT |
742 | struct xfrm_state *x; |
743 | struct sk_buff *resp_skb; | |
eb2971b6 | 744 | int err = -ESRCH; |
1da177e4 | 745 | |
35a7aa08 | 746 | x = xfrm_user_state_lookup(p, attrs, &err); |
1da177e4 LT |
747 | if (x == NULL) |
748 | goto out_noput; | |
749 | ||
750 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
751 | if (IS_ERR(resp_skb)) { | |
752 | err = PTR_ERR(resp_skb); | |
753 | } else { | |
082a1ad5 | 754 | err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
755 | } |
756 | xfrm_state_put(x); | |
757 | out_noput: | |
758 | return err; | |
759 | } | |
760 | ||
761 | static int verify_userspi_info(struct xfrm_userspi_info *p) | |
762 | { | |
763 | switch (p->info.id.proto) { | |
764 | case IPPROTO_AH: | |
765 | case IPPROTO_ESP: | |
766 | break; | |
767 | ||
768 | case IPPROTO_COMP: | |
769 | /* IPCOMP spi is 16-bits. */ | |
770 | if (p->max >= 0x10000) | |
771 | return -EINVAL; | |
772 | break; | |
773 | ||
774 | default: | |
775 | return -EINVAL; | |
3ff50b79 | 776 | } |
1da177e4 LT |
777 | |
778 | if (p->min > p->max) | |
779 | return -EINVAL; | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
22e70050 | 784 | static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 785 | struct nlattr **attrs) |
1da177e4 LT |
786 | { |
787 | struct xfrm_state *x; | |
788 | struct xfrm_userspi_info *p; | |
789 | struct sk_buff *resp_skb; | |
790 | xfrm_address_t *daddr; | |
791 | int family; | |
792 | int err; | |
793 | ||
7b67c857 | 794 | p = nlmsg_data(nlh); |
1da177e4 LT |
795 | err = verify_userspi_info(p); |
796 | if (err) | |
797 | goto out_noput; | |
798 | ||
799 | family = p->info.family; | |
800 | daddr = &p->info.id.daddr; | |
801 | ||
802 | x = NULL; | |
803 | if (p->info.seq) { | |
804 | x = xfrm_find_acq_byseq(p->info.seq); | |
805 | if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { | |
806 | xfrm_state_put(x); | |
807 | x = NULL; | |
808 | } | |
809 | } | |
810 | ||
811 | if (!x) | |
812 | x = xfrm_find_acq(p->info.mode, p->info.reqid, | |
813 | p->info.id.proto, daddr, | |
814 | &p->info.saddr, 1, | |
815 | family); | |
816 | err = -ENOENT; | |
817 | if (x == NULL) | |
818 | goto out_noput; | |
819 | ||
820 | resp_skb = ERR_PTR(-ENOENT); | |
821 | ||
822 | spin_lock_bh(&x->lock); | |
823 | if (x->km.state != XFRM_STATE_DEAD) { | |
824 | xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); | |
825 | if (x->id.spi) | |
826 | resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); | |
827 | } | |
828 | spin_unlock_bh(&x->lock); | |
829 | ||
830 | if (IS_ERR(resp_skb)) { | |
831 | err = PTR_ERR(resp_skb); | |
832 | goto out; | |
833 | } | |
834 | ||
082a1ad5 | 835 | err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); |
1da177e4 LT |
836 | |
837 | out: | |
838 | xfrm_state_put(x); | |
839 | out_noput: | |
840 | return err; | |
841 | } | |
842 | ||
b798a9ed | 843 | static int verify_policy_dir(u8 dir) |
1da177e4 LT |
844 | { |
845 | switch (dir) { | |
846 | case XFRM_POLICY_IN: | |
847 | case XFRM_POLICY_OUT: | |
848 | case XFRM_POLICY_FWD: | |
849 | break; | |
850 | ||
851 | default: | |
852 | return -EINVAL; | |
3ff50b79 | 853 | } |
1da177e4 LT |
854 | |
855 | return 0; | |
856 | } | |
857 | ||
b798a9ed | 858 | static int verify_policy_type(u8 type) |
f7b6983f MN |
859 | { |
860 | switch (type) { | |
861 | case XFRM_POLICY_TYPE_MAIN: | |
862 | #ifdef CONFIG_XFRM_SUB_POLICY | |
863 | case XFRM_POLICY_TYPE_SUB: | |
864 | #endif | |
865 | break; | |
866 | ||
867 | default: | |
868 | return -EINVAL; | |
3ff50b79 | 869 | } |
f7b6983f MN |
870 | |
871 | return 0; | |
872 | } | |
873 | ||
1da177e4 LT |
874 | static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) |
875 | { | |
876 | switch (p->share) { | |
877 | case XFRM_SHARE_ANY: | |
878 | case XFRM_SHARE_SESSION: | |
879 | case XFRM_SHARE_USER: | |
880 | case XFRM_SHARE_UNIQUE: | |
881 | break; | |
882 | ||
883 | default: | |
884 | return -EINVAL; | |
3ff50b79 | 885 | } |
1da177e4 LT |
886 | |
887 | switch (p->action) { | |
888 | case XFRM_POLICY_ALLOW: | |
889 | case XFRM_POLICY_BLOCK: | |
890 | break; | |
891 | ||
892 | default: | |
893 | return -EINVAL; | |
3ff50b79 | 894 | } |
1da177e4 LT |
895 | |
896 | switch (p->sel.family) { | |
897 | case AF_INET: | |
898 | break; | |
899 | ||
900 | case AF_INET6: | |
901 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
902 | break; | |
903 | #else | |
904 | return -EAFNOSUPPORT; | |
905 | #endif | |
906 | ||
907 | default: | |
908 | return -EINVAL; | |
3ff50b79 | 909 | } |
1da177e4 LT |
910 | |
911 | return verify_policy_dir(p->dir); | |
912 | } | |
913 | ||
5424f32e | 914 | static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) |
df71837d | 915 | { |
5424f32e | 916 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
917 | struct xfrm_user_sec_ctx *uctx; |
918 | ||
919 | if (!rt) | |
920 | return 0; | |
921 | ||
5424f32e | 922 | uctx = nla_data(rt); |
df71837d TJ |
923 | return security_xfrm_policy_alloc(pol, uctx); |
924 | } | |
925 | ||
1da177e4 LT |
926 | static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, |
927 | int nr) | |
928 | { | |
929 | int i; | |
930 | ||
931 | xp->xfrm_nr = nr; | |
932 | for (i = 0; i < nr; i++, ut++) { | |
933 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
934 | ||
935 | memcpy(&t->id, &ut->id, sizeof(struct xfrm_id)); | |
936 | memcpy(&t->saddr, &ut->saddr, | |
937 | sizeof(xfrm_address_t)); | |
938 | t->reqid = ut->reqid; | |
939 | t->mode = ut->mode; | |
940 | t->share = ut->share; | |
941 | t->optional = ut->optional; | |
942 | t->aalgos = ut->aalgos; | |
943 | t->ealgos = ut->ealgos; | |
944 | t->calgos = ut->calgos; | |
8511d01d | 945 | t->encap_family = ut->family; |
1da177e4 LT |
946 | } |
947 | } | |
948 | ||
b4ad86bf DM |
949 | static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) |
950 | { | |
951 | int i; | |
952 | ||
953 | if (nr > XFRM_MAX_DEPTH) | |
954 | return -EINVAL; | |
955 | ||
956 | for (i = 0; i < nr; i++) { | |
957 | /* We never validated the ut->family value, so many | |
958 | * applications simply leave it at zero. The check was | |
959 | * never made and ut->family was ignored because all | |
960 | * templates could be assumed to have the same family as | |
961 | * the policy itself. Now that we will have ipv4-in-ipv6 | |
962 | * and ipv6-in-ipv4 tunnels, this is no longer true. | |
963 | */ | |
964 | if (!ut[i].family) | |
965 | ut[i].family = family; | |
966 | ||
967 | switch (ut[i].family) { | |
968 | case AF_INET: | |
969 | break; | |
970 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
971 | case AF_INET6: | |
972 | break; | |
973 | #endif | |
974 | default: | |
975 | return -EINVAL; | |
3ff50b79 | 976 | } |
b4ad86bf DM |
977 | } |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
5424f32e | 982 | static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) |
1da177e4 | 983 | { |
5424f32e | 984 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
1da177e4 LT |
985 | |
986 | if (!rt) { | |
987 | pol->xfrm_nr = 0; | |
988 | } else { | |
5424f32e TG |
989 | struct xfrm_user_tmpl *utmpl = nla_data(rt); |
990 | int nr = nla_len(rt) / sizeof(*utmpl); | |
b4ad86bf | 991 | int err; |
1da177e4 | 992 | |
b4ad86bf DM |
993 | err = validate_tmpl(nr, utmpl, pol->family); |
994 | if (err) | |
995 | return err; | |
1da177e4 | 996 | |
5424f32e | 997 | copy_templates(pol, utmpl, nr); |
1da177e4 LT |
998 | } |
999 | return 0; | |
1000 | } | |
1001 | ||
5424f32e | 1002 | static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) |
f7b6983f | 1003 | { |
5424f32e | 1004 | struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; |
f7b6983f | 1005 | struct xfrm_userpolicy_type *upt; |
b798a9ed | 1006 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f MN |
1007 | int err; |
1008 | ||
1009 | if (rt) { | |
5424f32e | 1010 | upt = nla_data(rt); |
f7b6983f MN |
1011 | type = upt->type; |
1012 | } | |
1013 | ||
1014 | err = verify_policy_type(type); | |
1015 | if (err) | |
1016 | return err; | |
1017 | ||
1018 | *tp = type; | |
1019 | return 0; | |
1020 | } | |
1021 | ||
1da177e4 LT |
1022 | static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p) |
1023 | { | |
1024 | xp->priority = p->priority; | |
1025 | xp->index = p->index; | |
1026 | memcpy(&xp->selector, &p->sel, sizeof(xp->selector)); | |
1027 | memcpy(&xp->lft, &p->lft, sizeof(xp->lft)); | |
1028 | xp->action = p->action; | |
1029 | xp->flags = p->flags; | |
1030 | xp->family = p->sel.family; | |
1031 | /* XXX xp->share = p->share; */ | |
1032 | } | |
1033 | ||
1034 | static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) | |
1035 | { | |
1036 | memcpy(&p->sel, &xp->selector, sizeof(p->sel)); | |
1037 | memcpy(&p->lft, &xp->lft, sizeof(p->lft)); | |
1038 | memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); | |
1039 | p->priority = xp->priority; | |
1040 | p->index = xp->index; | |
1041 | p->sel.family = xp->family; | |
1042 | p->dir = dir; | |
1043 | p->action = xp->action; | |
1044 | p->flags = xp->flags; | |
1045 | p->share = XFRM_SHARE_ANY; /* XXX xp->share */ | |
1046 | } | |
1047 | ||
5424f32e | 1048 | static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) |
1da177e4 LT |
1049 | { |
1050 | struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); | |
1051 | int err; | |
1052 | ||
1053 | if (!xp) { | |
1054 | *errp = -ENOMEM; | |
1055 | return NULL; | |
1056 | } | |
1057 | ||
1058 | copy_from_user_policy(xp, p); | |
df71837d | 1059 | |
35a7aa08 | 1060 | err = copy_from_user_policy_type(&xp->type, attrs); |
f7b6983f MN |
1061 | if (err) |
1062 | goto error; | |
1063 | ||
35a7aa08 TG |
1064 | if (!(err = copy_from_user_tmpl(xp, attrs))) |
1065 | err = copy_from_user_sec_ctx(xp, attrs); | |
f7b6983f MN |
1066 | if (err) |
1067 | goto error; | |
1da177e4 LT |
1068 | |
1069 | return xp; | |
f7b6983f MN |
1070 | error: |
1071 | *errp = err; | |
1072 | kfree(xp); | |
1073 | return NULL; | |
1da177e4 LT |
1074 | } |
1075 | ||
22e70050 | 1076 | static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1077 | struct nlattr **attrs) |
1da177e4 | 1078 | { |
7b67c857 | 1079 | struct xfrm_userpolicy_info *p = nlmsg_data(nlh); |
1da177e4 | 1080 | struct xfrm_policy *xp; |
26b15dad | 1081 | struct km_event c; |
1da177e4 LT |
1082 | int err; |
1083 | int excl; | |
1084 | ||
1085 | err = verify_newpolicy_info(p); | |
df71837d TJ |
1086 | if (err) |
1087 | return err; | |
35a7aa08 | 1088 | err = verify_sec_ctx_len(attrs); |
1da177e4 LT |
1089 | if (err) |
1090 | return err; | |
1091 | ||
35a7aa08 | 1092 | xp = xfrm_policy_construct(p, attrs, &err); |
1da177e4 LT |
1093 | if (!xp) |
1094 | return err; | |
1095 | ||
26b15dad JHS |
1096 | /* shouldnt excl be based on nlh flags?? |
1097 | * Aha! this is anti-netlink really i.e more pfkey derived | |
1098 | * in netlink excl is a flag and you wouldnt need | |
1099 | * a type XFRM_MSG_UPDPOLICY - JHS */ | |
1da177e4 LT |
1100 | excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; |
1101 | err = xfrm_policy_insert(p->dir, xp, excl); | |
161a09e7 JL |
1102 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1103 | AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); | |
1104 | ||
1da177e4 | 1105 | if (err) { |
5f8ac64b | 1106 | security_xfrm_policy_free(xp); |
1da177e4 LT |
1107 | kfree(xp); |
1108 | return err; | |
1109 | } | |
1110 | ||
f60f6b8f | 1111 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1112 | c.seq = nlh->nlmsg_seq; |
1113 | c.pid = nlh->nlmsg_pid; | |
1114 | km_policy_notify(xp, p->dir, &c); | |
1115 | ||
1da177e4 LT |
1116 | xfrm_pol_put(xp); |
1117 | ||
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) | |
1122 | { | |
1123 | struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH]; | |
1124 | int i; | |
1125 | ||
1126 | if (xp->xfrm_nr == 0) | |
1127 | return 0; | |
1128 | ||
1129 | for (i = 0; i < xp->xfrm_nr; i++) { | |
1130 | struct xfrm_user_tmpl *up = &vec[i]; | |
1131 | struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; | |
1132 | ||
1133 | memcpy(&up->id, &kp->id, sizeof(up->id)); | |
8511d01d | 1134 | up->family = kp->encap_family; |
1da177e4 LT |
1135 | memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); |
1136 | up->reqid = kp->reqid; | |
1137 | up->mode = kp->mode; | |
1138 | up->share = kp->share; | |
1139 | up->optional = kp->optional; | |
1140 | up->aalgos = kp->aalgos; | |
1141 | up->ealgos = kp->ealgos; | |
1142 | up->calgos = kp->calgos; | |
1143 | } | |
df71837d | 1144 | |
c0144bea TG |
1145 | return nla_put(skb, XFRMA_TMPL, |
1146 | sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); | |
0d681623 SH |
1147 | } |
1148 | ||
1149 | static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) | |
1150 | { | |
1151 | if (x->security) { | |
1152 | return copy_sec_ctx(x->security, skb); | |
df71837d TJ |
1153 | } |
1154 | return 0; | |
0d681623 | 1155 | } |
df71837d | 1156 | |
0d681623 SH |
1157 | static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) |
1158 | { | |
1159 | if (xp->security) { | |
1160 | return copy_sec_ctx(xp->security, skb); | |
1161 | } | |
1162 | return 0; | |
df71837d | 1163 | } |
cfbfd45a TG |
1164 | static inline size_t userpolicy_type_attrsize(void) |
1165 | { | |
1166 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1167 | return nla_total_size(sizeof(struct xfrm_userpolicy_type)); | |
1168 | #else | |
1169 | return 0; | |
1170 | #endif | |
1171 | } | |
df71837d | 1172 | |
f7b6983f | 1173 | #ifdef CONFIG_XFRM_SUB_POLICY |
b798a9ed | 1174 | static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f | 1175 | { |
c0144bea TG |
1176 | struct xfrm_userpolicy_type upt = { |
1177 | .type = type, | |
1178 | }; | |
f7b6983f | 1179 | |
c0144bea | 1180 | return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); |
f7b6983f MN |
1181 | } |
1182 | ||
1183 | #else | |
b798a9ed | 1184 | static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb) |
f7b6983f MN |
1185 | { |
1186 | return 0; | |
1187 | } | |
1188 | #endif | |
1189 | ||
1da177e4 LT |
1190 | static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr) |
1191 | { | |
1192 | struct xfrm_dump_info *sp = ptr; | |
1193 | struct xfrm_userpolicy_info *p; | |
1194 | struct sk_buff *in_skb = sp->in_skb; | |
1195 | struct sk_buff *skb = sp->out_skb; | |
1196 | struct nlmsghdr *nlh; | |
1da177e4 LT |
1197 | |
1198 | if (sp->this_idx < sp->start_idx) | |
1199 | goto out; | |
1200 | ||
79b8b7f4 TG |
1201 | nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, |
1202 | XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); | |
1203 | if (nlh == NULL) | |
1204 | return -EMSGSIZE; | |
1da177e4 | 1205 | |
7b67c857 | 1206 | p = nlmsg_data(nlh); |
1da177e4 LT |
1207 | copy_to_user_policy(xp, p, dir); |
1208 | if (copy_to_user_tmpl(xp, skb) < 0) | |
1209 | goto nlmsg_failure; | |
df71837d TJ |
1210 | if (copy_to_user_sec_ctx(xp, skb)) |
1211 | goto nlmsg_failure; | |
1459bb36 | 1212 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 1213 | goto nlmsg_failure; |
1da177e4 | 1214 | |
9825069d | 1215 | nlmsg_end(skb, nlh); |
1da177e4 LT |
1216 | out: |
1217 | sp->this_idx++; | |
1218 | return 0; | |
1219 | ||
1220 | nlmsg_failure: | |
9825069d TG |
1221 | nlmsg_cancel(skb, nlh); |
1222 | return -EMSGSIZE; | |
1da177e4 LT |
1223 | } |
1224 | ||
1225 | static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) | |
1226 | { | |
1227 | struct xfrm_dump_info info; | |
1228 | ||
1229 | info.in_skb = cb->skb; | |
1230 | info.out_skb = skb; | |
1231 | info.nlmsg_seq = cb->nlh->nlmsg_seq; | |
1232 | info.nlmsg_flags = NLM_F_MULTI; | |
1233 | info.this_idx = 0; | |
1234 | info.start_idx = cb->args[0]; | |
f7b6983f MN |
1235 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info); |
1236 | #ifdef CONFIG_XFRM_SUB_POLICY | |
1237 | (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info); | |
1238 | #endif | |
1da177e4 LT |
1239 | cb->args[0] = info.this_idx; |
1240 | ||
1241 | return skb->len; | |
1242 | } | |
1243 | ||
1244 | static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, | |
1245 | struct xfrm_policy *xp, | |
1246 | int dir, u32 seq) | |
1247 | { | |
1248 | struct xfrm_dump_info info; | |
1249 | struct sk_buff *skb; | |
1250 | ||
7deb2264 | 1251 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1da177e4 LT |
1252 | if (!skb) |
1253 | return ERR_PTR(-ENOMEM); | |
1254 | ||
1da177e4 LT |
1255 | info.in_skb = in_skb; |
1256 | info.out_skb = skb; | |
1257 | info.nlmsg_seq = seq; | |
1258 | info.nlmsg_flags = 0; | |
1259 | info.this_idx = info.start_idx = 0; | |
1260 | ||
1261 | if (dump_one_policy(xp, dir, 0, &info) < 0) { | |
1262 | kfree_skb(skb); | |
1263 | return NULL; | |
1264 | } | |
1265 | ||
1266 | return skb; | |
1267 | } | |
1268 | ||
22e70050 | 1269 | static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1270 | struct nlattr **attrs) |
1da177e4 LT |
1271 | { |
1272 | struct xfrm_policy *xp; | |
1273 | struct xfrm_userpolicy_id *p; | |
b798a9ed | 1274 | u8 type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 | 1275 | int err; |
26b15dad | 1276 | struct km_event c; |
1da177e4 LT |
1277 | int delete; |
1278 | ||
7b67c857 | 1279 | p = nlmsg_data(nlh); |
1da177e4 LT |
1280 | delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; |
1281 | ||
35a7aa08 | 1282 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1283 | if (err) |
1284 | return err; | |
1285 | ||
1da177e4 LT |
1286 | err = verify_policy_dir(p->dir); |
1287 | if (err) | |
1288 | return err; | |
1289 | ||
1290 | if (p->index) | |
ef41aaa0 | 1291 | xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err); |
df71837d | 1292 | else { |
5424f32e | 1293 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
df71837d TJ |
1294 | struct xfrm_policy tmp; |
1295 | ||
35a7aa08 | 1296 | err = verify_sec_ctx_len(attrs); |
df71837d TJ |
1297 | if (err) |
1298 | return err; | |
1299 | ||
1300 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1301 | if (rt) { | |
5424f32e | 1302 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
df71837d TJ |
1303 | |
1304 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1305 | return err; | |
1306 | } | |
ef41aaa0 EP |
1307 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1308 | delete, &err); | |
df71837d TJ |
1309 | security_xfrm_policy_free(&tmp); |
1310 | } | |
1da177e4 LT |
1311 | if (xp == NULL) |
1312 | return -ENOENT; | |
1313 | ||
1314 | if (!delete) { | |
1315 | struct sk_buff *resp_skb; | |
1316 | ||
1317 | resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq); | |
1318 | if (IS_ERR(resp_skb)) { | |
1319 | err = PTR_ERR(resp_skb); | |
1320 | } else { | |
082a1ad5 TG |
1321 | err = nlmsg_unicast(xfrm_nl, resp_skb, |
1322 | NETLINK_CB(skb).pid); | |
1da177e4 | 1323 | } |
26b15dad | 1324 | } else { |
13fcfbb0 DM |
1325 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1326 | AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); | |
1327 | ||
1328 | if (err != 0) | |
c8c05a8e | 1329 | goto out; |
13fcfbb0 | 1330 | |
e7443892 | 1331 | c.data.byid = p->index; |
f60f6b8f | 1332 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1333 | c.seq = nlh->nlmsg_seq; |
1334 | c.pid = nlh->nlmsg_pid; | |
1335 | km_policy_notify(xp, p->dir, &c); | |
1da177e4 LT |
1336 | } |
1337 | ||
c8c05a8e | 1338 | out: |
ef41aaa0 | 1339 | xfrm_pol_put(xp); |
1da177e4 LT |
1340 | return err; |
1341 | } | |
1342 | ||
22e70050 | 1343 | static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1344 | struct nlattr **attrs) |
1da177e4 | 1345 | { |
26b15dad | 1346 | struct km_event c; |
7b67c857 | 1347 | struct xfrm_usersa_flush *p = nlmsg_data(nlh); |
161a09e7 | 1348 | struct xfrm_audit audit_info; |
4aa2e62c | 1349 | int err; |
1da177e4 | 1350 | |
161a09e7 JL |
1351 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1352 | audit_info.secid = NETLINK_CB(skb).sid; | |
4aa2e62c JL |
1353 | err = xfrm_state_flush(p->proto, &audit_info); |
1354 | if (err) | |
1355 | return err; | |
bf08867f | 1356 | c.data.proto = p->proto; |
f60f6b8f | 1357 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1358 | c.seq = nlh->nlmsg_seq; |
1359 | c.pid = nlh->nlmsg_pid; | |
1360 | km_state_notify(NULL, &c); | |
1361 | ||
1da177e4 LT |
1362 | return 0; |
1363 | } | |
1364 | ||
7deb2264 TG |
1365 | static inline size_t xfrm_aevent_msgsize(void) |
1366 | { | |
1367 | return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) | |
1368 | + nla_total_size(sizeof(struct xfrm_replay_state)) | |
1369 | + nla_total_size(sizeof(struct xfrm_lifetime_cur)) | |
1370 | + nla_total_size(4) /* XFRM_AE_RTHR */ | |
1371 | + nla_total_size(4); /* XFRM_AE_ETHR */ | |
1372 | } | |
d51d081d JHS |
1373 | |
1374 | static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) | |
1375 | { | |
1376 | struct xfrm_aevent_id *id; | |
1377 | struct nlmsghdr *nlh; | |
d51d081d | 1378 | |
79b8b7f4 TG |
1379 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); |
1380 | if (nlh == NULL) | |
1381 | return -EMSGSIZE; | |
d51d081d | 1382 | |
7b67c857 | 1383 | id = nlmsg_data(nlh); |
2b5f6dcc | 1384 | memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); |
d51d081d JHS |
1385 | id->sa_id.spi = x->id.spi; |
1386 | id->sa_id.family = x->props.family; | |
1387 | id->sa_id.proto = x->id.proto; | |
2b5f6dcc JHS |
1388 | memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); |
1389 | id->reqid = x->props.reqid; | |
d51d081d JHS |
1390 | id->flags = c->data.aevent; |
1391 | ||
c0144bea TG |
1392 | NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); |
1393 | NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); | |
d51d081d | 1394 | |
c0144bea TG |
1395 | if (id->flags & XFRM_AE_RTHR) |
1396 | NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); | |
d51d081d | 1397 | |
c0144bea TG |
1398 | if (id->flags & XFRM_AE_ETHR) |
1399 | NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, | |
1400 | x->replay_maxage * 10 / HZ); | |
d51d081d | 1401 | |
9825069d | 1402 | return nlmsg_end(skb, nlh); |
d51d081d | 1403 | |
c0144bea | 1404 | nla_put_failure: |
9825069d TG |
1405 | nlmsg_cancel(skb, nlh); |
1406 | return -EMSGSIZE; | |
d51d081d JHS |
1407 | } |
1408 | ||
22e70050 | 1409 | static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1410 | struct nlattr **attrs) |
d51d081d JHS |
1411 | { |
1412 | struct xfrm_state *x; | |
1413 | struct sk_buff *r_skb; | |
1414 | int err; | |
1415 | struct km_event c; | |
7b67c857 | 1416 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
d51d081d JHS |
1417 | struct xfrm_usersa_id *id = &p->sa_id; |
1418 | ||
7deb2264 | 1419 | r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
1420 | if (r_skb == NULL) |
1421 | return -ENOMEM; | |
1422 | ||
1423 | x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); | |
1424 | if (x == NULL) { | |
b08d5840 | 1425 | kfree_skb(r_skb); |
d51d081d JHS |
1426 | return -ESRCH; |
1427 | } | |
1428 | ||
1429 | /* | |
1430 | * XXX: is this lock really needed - none of the other | |
1431 | * gets lock (the concern is things getting updated | |
1432 | * while we are still reading) - jhs | |
1433 | */ | |
1434 | spin_lock_bh(&x->lock); | |
1435 | c.data.aevent = p->flags; | |
1436 | c.seq = nlh->nlmsg_seq; | |
1437 | c.pid = nlh->nlmsg_pid; | |
1438 | ||
1439 | if (build_aevent(r_skb, x, &c) < 0) | |
1440 | BUG(); | |
082a1ad5 | 1441 | err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid); |
d51d081d JHS |
1442 | spin_unlock_bh(&x->lock); |
1443 | xfrm_state_put(x); | |
1444 | return err; | |
1445 | } | |
1446 | ||
22e70050 | 1447 | static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1448 | struct nlattr **attrs) |
d51d081d JHS |
1449 | { |
1450 | struct xfrm_state *x; | |
1451 | struct km_event c; | |
1452 | int err = - EINVAL; | |
7b67c857 | 1453 | struct xfrm_aevent_id *p = nlmsg_data(nlh); |
5424f32e TG |
1454 | struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; |
1455 | struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; | |
d51d081d JHS |
1456 | |
1457 | if (!lt && !rp) | |
1458 | return err; | |
1459 | ||
1460 | /* pedantic mode - thou shalt sayeth replaceth */ | |
1461 | if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) | |
1462 | return err; | |
1463 | ||
1464 | x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); | |
1465 | if (x == NULL) | |
1466 | return -ESRCH; | |
1467 | ||
1468 | if (x->km.state != XFRM_STATE_VALID) | |
1469 | goto out; | |
1470 | ||
1471 | spin_lock_bh(&x->lock); | |
35a7aa08 | 1472 | xfrm_update_ae_params(x, attrs); |
d51d081d | 1473 | spin_unlock_bh(&x->lock); |
d51d081d JHS |
1474 | |
1475 | c.event = nlh->nlmsg_type; | |
1476 | c.seq = nlh->nlmsg_seq; | |
1477 | c.pid = nlh->nlmsg_pid; | |
1478 | c.data.aevent = XFRM_AE_CU; | |
1479 | km_state_notify(x, &c); | |
1480 | err = 0; | |
1481 | out: | |
1482 | xfrm_state_put(x); | |
1483 | return err; | |
1484 | } | |
1485 | ||
22e70050 | 1486 | static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1487 | struct nlattr **attrs) |
1da177e4 | 1488 | { |
f7b6983f | 1489 | struct km_event c; |
b798a9ed | 1490 | u8 type = XFRM_POLICY_TYPE_MAIN; |
f7b6983f | 1491 | int err; |
161a09e7 | 1492 | struct xfrm_audit audit_info; |
f7b6983f | 1493 | |
35a7aa08 | 1494 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1495 | if (err) |
1496 | return err; | |
26b15dad | 1497 | |
161a09e7 JL |
1498 | audit_info.loginuid = NETLINK_CB(skb).loginuid; |
1499 | audit_info.secid = NETLINK_CB(skb).sid; | |
4aa2e62c JL |
1500 | err = xfrm_policy_flush(type, &audit_info); |
1501 | if (err) | |
1502 | return err; | |
f7b6983f | 1503 | c.data.type = type; |
f60f6b8f | 1504 | c.event = nlh->nlmsg_type; |
26b15dad JHS |
1505 | c.seq = nlh->nlmsg_seq; |
1506 | c.pid = nlh->nlmsg_pid; | |
1507 | km_policy_notify(NULL, 0, &c); | |
1da177e4 LT |
1508 | return 0; |
1509 | } | |
1510 | ||
22e70050 | 1511 | static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1512 | struct nlattr **attrs) |
6c5c8ca7 JHS |
1513 | { |
1514 | struct xfrm_policy *xp; | |
7b67c857 | 1515 | struct xfrm_user_polexpire *up = nlmsg_data(nlh); |
6c5c8ca7 | 1516 | struct xfrm_userpolicy_info *p = &up->pol; |
b798a9ed | 1517 | u8 type = XFRM_POLICY_TYPE_MAIN; |
6c5c8ca7 JHS |
1518 | int err = -ENOENT; |
1519 | ||
35a7aa08 | 1520 | err = copy_from_user_policy_type(&type, attrs); |
f7b6983f MN |
1521 | if (err) |
1522 | return err; | |
1523 | ||
6c5c8ca7 | 1524 | if (p->index) |
ef41aaa0 | 1525 | xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err); |
6c5c8ca7 | 1526 | else { |
5424f32e | 1527 | struct nlattr *rt = attrs[XFRMA_SEC_CTX]; |
6c5c8ca7 JHS |
1528 | struct xfrm_policy tmp; |
1529 | ||
35a7aa08 | 1530 | err = verify_sec_ctx_len(attrs); |
6c5c8ca7 JHS |
1531 | if (err) |
1532 | return err; | |
1533 | ||
1534 | memset(&tmp, 0, sizeof(struct xfrm_policy)); | |
1535 | if (rt) { | |
5424f32e | 1536 | struct xfrm_user_sec_ctx *uctx = nla_data(rt); |
6c5c8ca7 JHS |
1537 | |
1538 | if ((err = security_xfrm_policy_alloc(&tmp, uctx))) | |
1539 | return err; | |
1540 | } | |
ef41aaa0 EP |
1541 | xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, |
1542 | 0, &err); | |
6c5c8ca7 JHS |
1543 | security_xfrm_policy_free(&tmp); |
1544 | } | |
1545 | ||
1546 | if (xp == NULL) | |
ef41aaa0 EP |
1547 | return -ENOENT; |
1548 | read_lock(&xp->lock); | |
6c5c8ca7 JHS |
1549 | if (xp->dead) { |
1550 | read_unlock(&xp->lock); | |
1551 | goto out; | |
1552 | } | |
1553 | ||
1554 | read_unlock(&xp->lock); | |
1555 | err = 0; | |
1556 | if (up->hard) { | |
1557 | xfrm_policy_delete(xp, p->dir); | |
161a09e7 JL |
1558 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1559 | AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL); | |
1560 | ||
6c5c8ca7 JHS |
1561 | } else { |
1562 | // reset the timers here? | |
1563 | printk("Dont know what to do with soft policy expire\n"); | |
1564 | } | |
1565 | km_policy_expired(xp, p->dir, up->hard, current->pid); | |
1566 | ||
1567 | out: | |
1568 | xfrm_pol_put(xp); | |
1569 | return err; | |
1570 | } | |
1571 | ||
22e70050 | 1572 | static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1573 | struct nlattr **attrs) |
53bc6b4d JHS |
1574 | { |
1575 | struct xfrm_state *x; | |
1576 | int err; | |
7b67c857 | 1577 | struct xfrm_user_expire *ue = nlmsg_data(nlh); |
53bc6b4d JHS |
1578 | struct xfrm_usersa_info *p = &ue->state; |
1579 | ||
1580 | x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); | |
53bc6b4d | 1581 | |
3a765aa5 | 1582 | err = -ENOENT; |
53bc6b4d JHS |
1583 | if (x == NULL) |
1584 | return err; | |
1585 | ||
53bc6b4d | 1586 | spin_lock_bh(&x->lock); |
3a765aa5 | 1587 | err = -EINVAL; |
53bc6b4d JHS |
1588 | if (x->km.state != XFRM_STATE_VALID) |
1589 | goto out; | |
1590 | km_state_expired(x, ue->hard, current->pid); | |
1591 | ||
161a09e7 | 1592 | if (ue->hard) { |
53bc6b4d | 1593 | __xfrm_state_delete(x); |
161a09e7 JL |
1594 | xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, |
1595 | AUDIT_MAC_IPSEC_DELSA, 1, NULL, x); | |
1596 | } | |
3a765aa5 | 1597 | err = 0; |
53bc6b4d JHS |
1598 | out: |
1599 | spin_unlock_bh(&x->lock); | |
1600 | xfrm_state_put(x); | |
1601 | return err; | |
1602 | } | |
1603 | ||
22e70050 | 1604 | static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, |
5424f32e | 1605 | struct nlattr **attrs) |
980ebd25 JHS |
1606 | { |
1607 | struct xfrm_policy *xp; | |
1608 | struct xfrm_user_tmpl *ut; | |
1609 | int i; | |
5424f32e | 1610 | struct nlattr *rt = attrs[XFRMA_TMPL]; |
980ebd25 | 1611 | |
7b67c857 | 1612 | struct xfrm_user_acquire *ua = nlmsg_data(nlh); |
980ebd25 JHS |
1613 | struct xfrm_state *x = xfrm_state_alloc(); |
1614 | int err = -ENOMEM; | |
1615 | ||
1616 | if (!x) | |
1617 | return err; | |
1618 | ||
1619 | err = verify_newpolicy_info(&ua->policy); | |
1620 | if (err) { | |
1621 | printk("BAD policy passed\n"); | |
1622 | kfree(x); | |
1623 | return err; | |
1624 | } | |
1625 | ||
1626 | /* build an XP */ | |
5424f32e | 1627 | xp = xfrm_policy_construct(&ua->policy, attrs, &err); |
b4ad86bf | 1628 | if (!xp) { |
980ebd25 JHS |
1629 | kfree(x); |
1630 | return err; | |
1631 | } | |
1632 | ||
1633 | memcpy(&x->id, &ua->id, sizeof(ua->id)); | |
1634 | memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); | |
1635 | memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); | |
1636 | ||
5424f32e | 1637 | ut = nla_data(rt); |
980ebd25 JHS |
1638 | /* extract the templates and for each call km_key */ |
1639 | for (i = 0; i < xp->xfrm_nr; i++, ut++) { | |
1640 | struct xfrm_tmpl *t = &xp->xfrm_vec[i]; | |
1641 | memcpy(&x->id, &t->id, sizeof(x->id)); | |
1642 | x->props.mode = t->mode; | |
1643 | x->props.reqid = t->reqid; | |
1644 | x->props.family = ut->family; | |
1645 | t->aalgos = ua->aalgos; | |
1646 | t->ealgos = ua->ealgos; | |
1647 | t->calgos = ua->calgos; | |
1648 | err = km_query(x, t, xp); | |
1649 | ||
1650 | } | |
1651 | ||
1652 | kfree(x); | |
1653 | kfree(xp); | |
1654 | ||
1655 | return 0; | |
1656 | } | |
1657 | ||
5c79de6e | 1658 | #ifdef CONFIG_XFRM_MIGRATE |
5c79de6e | 1659 | static int copy_from_user_migrate(struct xfrm_migrate *ma, |
5424f32e | 1660 | struct nlattr **attrs, int *num) |
5c79de6e | 1661 | { |
5424f32e | 1662 | struct nlattr *rt = attrs[XFRMA_MIGRATE]; |
5c79de6e SS |
1663 | struct xfrm_user_migrate *um; |
1664 | int i, num_migrate; | |
1665 | ||
5424f32e TG |
1666 | um = nla_data(rt); |
1667 | num_migrate = nla_len(rt) / sizeof(*um); | |
5c79de6e SS |
1668 | |
1669 | if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) | |
1670 | return -EINVAL; | |
1671 | ||
1672 | for (i = 0; i < num_migrate; i++, um++, ma++) { | |
1673 | memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr)); | |
1674 | memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr)); | |
1675 | memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr)); | |
1676 | memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr)); | |
1677 | ||
1678 | ma->proto = um->proto; | |
1679 | ma->mode = um->mode; | |
1680 | ma->reqid = um->reqid; | |
1681 | ||
1682 | ma->old_family = um->old_family; | |
1683 | ma->new_family = um->new_family; | |
1684 | } | |
1685 | ||
1686 | *num = i; | |
1687 | return 0; | |
1688 | } | |
1689 | ||
1690 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1691 | struct nlattr **attrs) |
5c79de6e | 1692 | { |
7b67c857 | 1693 | struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); |
5c79de6e SS |
1694 | struct xfrm_migrate m[XFRM_MAX_DEPTH]; |
1695 | u8 type; | |
1696 | int err; | |
1697 | int n = 0; | |
1698 | ||
35a7aa08 | 1699 | if (attrs[XFRMA_MIGRATE] == NULL) |
cf5cb79f | 1700 | return -EINVAL; |
5c79de6e | 1701 | |
5424f32e | 1702 | err = copy_from_user_policy_type(&type, attrs); |
5c79de6e SS |
1703 | if (err) |
1704 | return err; | |
1705 | ||
1706 | err = copy_from_user_migrate((struct xfrm_migrate *)m, | |
5424f32e | 1707 | attrs, &n); |
5c79de6e SS |
1708 | if (err) |
1709 | return err; | |
1710 | ||
1711 | if (!n) | |
1712 | return 0; | |
1713 | ||
1714 | xfrm_migrate(&pi->sel, pi->dir, type, m, n); | |
1715 | ||
1716 | return 0; | |
1717 | } | |
1718 | #else | |
1719 | static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, | |
5424f32e | 1720 | struct nlattr **attrs) |
5c79de6e SS |
1721 | { |
1722 | return -ENOPROTOOPT; | |
1723 | } | |
1724 | #endif | |
1725 | ||
1726 | #ifdef CONFIG_XFRM_MIGRATE | |
1727 | static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) | |
1728 | { | |
1729 | struct xfrm_user_migrate um; | |
1730 | ||
1731 | memset(&um, 0, sizeof(um)); | |
1732 | um.proto = m->proto; | |
1733 | um.mode = m->mode; | |
1734 | um.reqid = m->reqid; | |
1735 | um.old_family = m->old_family; | |
1736 | memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr)); | |
1737 | memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr)); | |
1738 | um.new_family = m->new_family; | |
1739 | memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); | |
1740 | memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); | |
1741 | ||
c0144bea | 1742 | return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); |
5c79de6e SS |
1743 | } |
1744 | ||
7deb2264 TG |
1745 | static inline size_t xfrm_migrate_msgsize(int num_migrate) |
1746 | { | |
1747 | return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) | |
1748 | + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) | |
1749 | + userpolicy_type_attrsize(); | |
1750 | } | |
1751 | ||
5c79de6e SS |
1752 | static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, |
1753 | int num_migrate, struct xfrm_selector *sel, | |
1754 | u8 dir, u8 type) | |
1755 | { | |
1756 | struct xfrm_migrate *mp; | |
1757 | struct xfrm_userpolicy_id *pol_id; | |
1758 | struct nlmsghdr *nlh; | |
5c79de6e SS |
1759 | int i; |
1760 | ||
79b8b7f4 TG |
1761 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); |
1762 | if (nlh == NULL) | |
1763 | return -EMSGSIZE; | |
5c79de6e | 1764 | |
7b67c857 | 1765 | pol_id = nlmsg_data(nlh); |
5c79de6e SS |
1766 | /* copy data from selector, dir, and type to the pol_id */ |
1767 | memset(pol_id, 0, sizeof(*pol_id)); | |
1768 | memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); | |
1769 | pol_id->dir = dir; | |
1770 | ||
1771 | if (copy_to_user_policy_type(type, skb) < 0) | |
1772 | goto nlmsg_failure; | |
1773 | ||
1774 | for (i = 0, mp = m ; i < num_migrate; i++, mp++) { | |
1775 | if (copy_to_user_migrate(mp, skb) < 0) | |
1776 | goto nlmsg_failure; | |
1777 | } | |
1778 | ||
9825069d | 1779 | return nlmsg_end(skb, nlh); |
5c79de6e | 1780 | nlmsg_failure: |
9825069d TG |
1781 | nlmsg_cancel(skb, nlh); |
1782 | return -EMSGSIZE; | |
5c79de6e SS |
1783 | } |
1784 | ||
1785 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1786 | struct xfrm_migrate *m, int num_migrate) | |
1787 | { | |
1788 | struct sk_buff *skb; | |
5c79de6e | 1789 | |
7deb2264 | 1790 | skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC); |
5c79de6e SS |
1791 | if (skb == NULL) |
1792 | return -ENOMEM; | |
1793 | ||
1794 | /* build migrate */ | |
1795 | if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0) | |
1796 | BUG(); | |
1797 | ||
082a1ad5 | 1798 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); |
5c79de6e SS |
1799 | } |
1800 | #else | |
1801 | static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1802 | struct xfrm_migrate *m, int num_migrate) | |
1803 | { | |
1804 | return -ENOPROTOOPT; | |
1805 | } | |
1806 | #endif | |
d51d081d | 1807 | |
a7bd9a45 | 1808 | #define XMSGSIZE(type) sizeof(struct type) |
492b558b TG |
1809 | |
1810 | static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { | |
1811 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
1812 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1813 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id), | |
1814 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), | |
1815 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1816 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), | |
1817 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info), | |
980ebd25 | 1818 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire), |
53bc6b4d | 1819 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire), |
492b558b TG |
1820 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info), |
1821 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), | |
6c5c8ca7 | 1822 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), |
492b558b | 1823 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), |
a7bd9a45 | 1824 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, |
d51d081d JHS |
1825 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), |
1826 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), | |
97a64b45 | 1827 | [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), |
5c79de6e | 1828 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), |
a7bd9a45 TG |
1829 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), |
1830 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), | |
1da177e4 LT |
1831 | }; |
1832 | ||
492b558b TG |
1833 | #undef XMSGSIZE |
1834 | ||
cf5cb79f TG |
1835 | static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { |
1836 | [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, | |
1837 | [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, | |
1838 | [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, | |
1839 | [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, | |
1840 | [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, | |
1841 | [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, | |
1842 | [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, | |
1843 | [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, | |
1844 | [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, | |
1845 | [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, | |
1846 | [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, | |
1847 | [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, | |
1848 | [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, | |
1849 | [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, | |
1850 | }; | |
1851 | ||
1da177e4 | 1852 | static struct xfrm_link { |
5424f32e | 1853 | int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); |
1da177e4 | 1854 | int (*dump)(struct sk_buff *, struct netlink_callback *); |
492b558b TG |
1855 | } xfrm_dispatch[XFRM_NR_MSGTYPES] = { |
1856 | [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
1857 | [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, | |
1858 | [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, | |
1859 | .dump = xfrm_dump_sa }, | |
1860 | [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, | |
1861 | [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, | |
1862 | [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, | |
1863 | .dump = xfrm_dump_policy }, | |
1864 | [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, | |
980ebd25 | 1865 | [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, |
53bc6b4d | 1866 | [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, |
492b558b TG |
1867 | [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, |
1868 | [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, | |
6c5c8ca7 | 1869 | [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire}, |
492b558b TG |
1870 | [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa }, |
1871 | [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy }, | |
d51d081d JHS |
1872 | [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae }, |
1873 | [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae }, | |
5c79de6e | 1874 | [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate }, |
566ec034 | 1875 | [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo }, |
ecfd6b18 | 1876 | [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo }, |
1da177e4 LT |
1877 | }; |
1878 | ||
1d00a4eb | 1879 | static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 | 1880 | { |
35a7aa08 | 1881 | struct nlattr *attrs[XFRMA_MAX+1]; |
1da177e4 | 1882 | struct xfrm_link *link; |
a7bd9a45 | 1883 | int type, err; |
1da177e4 | 1884 | |
1da177e4 | 1885 | type = nlh->nlmsg_type; |
1da177e4 | 1886 | if (type > XFRM_MSG_MAX) |
1d00a4eb | 1887 | return -EINVAL; |
1da177e4 LT |
1888 | |
1889 | type -= XFRM_MSG_BASE; | |
1890 | link = &xfrm_dispatch[type]; | |
1891 | ||
1892 | /* All operations require privileges, even GET */ | |
1d00a4eb TG |
1893 | if (security_netlink_recv(skb, CAP_NET_ADMIN)) |
1894 | return -EPERM; | |
1da177e4 | 1895 | |
492b558b TG |
1896 | if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || |
1897 | type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) && | |
1898 | (nlh->nlmsg_flags & NLM_F_DUMP)) { | |
1da177e4 | 1899 | if (link->dump == NULL) |
1d00a4eb | 1900 | return -EINVAL; |
88fc2c84 | 1901 | |
c702e804 | 1902 | return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL); |
1da177e4 LT |
1903 | } |
1904 | ||
35a7aa08 | 1905 | err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, |
cf5cb79f | 1906 | xfrma_policy); |
a7bd9a45 TG |
1907 | if (err < 0) |
1908 | return err; | |
1da177e4 LT |
1909 | |
1910 | if (link->doit == NULL) | |
1d00a4eb | 1911 | return -EINVAL; |
1da177e4 | 1912 | |
5424f32e | 1913 | return link->doit(skb, nlh, attrs); |
1da177e4 LT |
1914 | } |
1915 | ||
1da177e4 LT |
1916 | static void xfrm_netlink_rcv(struct sock *sk, int len) |
1917 | { | |
88fc2c84 | 1918 | unsigned int qlen = 0; |
2a0a6ebe | 1919 | |
1da177e4 | 1920 | do { |
4a3e2f71 | 1921 | mutex_lock(&xfrm_cfg_mutex); |
88fc2c84 | 1922 | netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); |
4a3e2f71 | 1923 | mutex_unlock(&xfrm_cfg_mutex); |
1da177e4 | 1924 | |
2a0a6ebe | 1925 | } while (qlen); |
1da177e4 LT |
1926 | } |
1927 | ||
7deb2264 TG |
1928 | static inline size_t xfrm_expire_msgsize(void) |
1929 | { | |
1930 | return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)); | |
1931 | } | |
1932 | ||
d51d081d | 1933 | static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1934 | { |
1935 | struct xfrm_user_expire *ue; | |
1936 | struct nlmsghdr *nlh; | |
1da177e4 | 1937 | |
79b8b7f4 TG |
1938 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); |
1939 | if (nlh == NULL) | |
1940 | return -EMSGSIZE; | |
1da177e4 | 1941 | |
7b67c857 | 1942 | ue = nlmsg_data(nlh); |
1da177e4 | 1943 | copy_to_user_state(x, &ue->state); |
d51d081d | 1944 | ue->hard = (c->data.hard != 0) ? 1 : 0; |
1da177e4 | 1945 | |
9825069d | 1946 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
1947 | } |
1948 | ||
26b15dad | 1949 | static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) |
1da177e4 LT |
1950 | { |
1951 | struct sk_buff *skb; | |
1952 | ||
7deb2264 | 1953 | skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); |
1da177e4 LT |
1954 | if (skb == NULL) |
1955 | return -ENOMEM; | |
1956 | ||
d51d081d | 1957 | if (build_expire(skb, x, c) < 0) |
1da177e4 LT |
1958 | BUG(); |
1959 | ||
082a1ad5 | 1960 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
1961 | } |
1962 | ||
d51d081d JHS |
1963 | static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) |
1964 | { | |
1965 | struct sk_buff *skb; | |
d51d081d | 1966 | |
7deb2264 | 1967 | skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); |
d51d081d JHS |
1968 | if (skb == NULL) |
1969 | return -ENOMEM; | |
1970 | ||
1971 | if (build_aevent(skb, x, c) < 0) | |
1972 | BUG(); | |
1973 | ||
082a1ad5 | 1974 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); |
d51d081d JHS |
1975 | } |
1976 | ||
26b15dad JHS |
1977 | static int xfrm_notify_sa_flush(struct km_event *c) |
1978 | { | |
1979 | struct xfrm_usersa_flush *p; | |
1980 | struct nlmsghdr *nlh; | |
1981 | struct sk_buff *skb; | |
7deb2264 | 1982 | int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); |
26b15dad | 1983 | |
7deb2264 | 1984 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
1985 | if (skb == NULL) |
1986 | return -ENOMEM; | |
26b15dad | 1987 | |
79b8b7f4 TG |
1988 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); |
1989 | if (nlh == NULL) { | |
1990 | kfree_skb(skb); | |
1991 | return -EMSGSIZE; | |
1992 | } | |
26b15dad | 1993 | |
7b67c857 | 1994 | p = nlmsg_data(nlh); |
bf08867f | 1995 | p->proto = c->data.proto; |
26b15dad | 1996 | |
9825069d | 1997 | nlmsg_end(skb, nlh); |
26b15dad | 1998 | |
082a1ad5 | 1999 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad JHS |
2000 | } |
2001 | ||
7deb2264 | 2002 | static inline size_t xfrm_sa_len(struct xfrm_state *x) |
26b15dad | 2003 | { |
7deb2264 | 2004 | size_t l = 0; |
26b15dad | 2005 | if (x->aalg) |
7deb2264 | 2006 | l += nla_total_size(alg_len(x->aalg)); |
26b15dad | 2007 | if (x->ealg) |
7deb2264 | 2008 | l += nla_total_size(alg_len(x->ealg)); |
26b15dad | 2009 | if (x->calg) |
7deb2264 | 2010 | l += nla_total_size(sizeof(*x->calg)); |
26b15dad | 2011 | if (x->encap) |
7deb2264 | 2012 | l += nla_total_size(sizeof(*x->encap)); |
26b15dad JHS |
2013 | |
2014 | return l; | |
2015 | } | |
2016 | ||
2017 | static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) | |
2018 | { | |
2019 | struct xfrm_usersa_info *p; | |
0603eac0 | 2020 | struct xfrm_usersa_id *id; |
26b15dad JHS |
2021 | struct nlmsghdr *nlh; |
2022 | struct sk_buff *skb; | |
26b15dad | 2023 | int len = xfrm_sa_len(x); |
0603eac0 HX |
2024 | int headlen; |
2025 | ||
2026 | headlen = sizeof(*p); | |
2027 | if (c->event == XFRM_MSG_DELSA) { | |
7deb2264 | 2028 | len += nla_total_size(headlen); |
0603eac0 HX |
2029 | headlen = sizeof(*id); |
2030 | } | |
7deb2264 | 2031 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2032 | |
7deb2264 | 2033 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2034 | if (skb == NULL) |
2035 | return -ENOMEM; | |
26b15dad | 2036 | |
79b8b7f4 TG |
2037 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2038 | if (nlh == NULL) | |
c0144bea | 2039 | goto nla_put_failure; |
26b15dad | 2040 | |
7b67c857 | 2041 | p = nlmsg_data(nlh); |
0603eac0 | 2042 | if (c->event == XFRM_MSG_DELSA) { |
c0144bea TG |
2043 | struct nlattr *attr; |
2044 | ||
7b67c857 | 2045 | id = nlmsg_data(nlh); |
0603eac0 HX |
2046 | memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); |
2047 | id->spi = x->id.spi; | |
2048 | id->family = x->props.family; | |
2049 | id->proto = x->id.proto; | |
2050 | ||
c0144bea TG |
2051 | attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); |
2052 | if (attr == NULL) | |
2053 | goto nla_put_failure; | |
2054 | ||
2055 | p = nla_data(attr); | |
0603eac0 HX |
2056 | } |
2057 | ||
26b15dad JHS |
2058 | copy_to_user_state(x, p); |
2059 | ||
2060 | if (x->aalg) | |
c26445ac | 2061 | NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg); |
26b15dad | 2062 | if (x->ealg) |
c26445ac | 2063 | NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg); |
26b15dad | 2064 | if (x->calg) |
c0144bea | 2065 | NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); |
26b15dad JHS |
2066 | |
2067 | if (x->encap) | |
c0144bea | 2068 | NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); |
26b15dad | 2069 | |
9825069d | 2070 | nlmsg_end(skb, nlh); |
26b15dad | 2071 | |
082a1ad5 | 2072 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); |
26b15dad | 2073 | |
c0144bea | 2074 | nla_put_failure: |
26b15dad JHS |
2075 | kfree_skb(skb); |
2076 | return -1; | |
2077 | } | |
2078 | ||
2079 | static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) | |
2080 | { | |
2081 | ||
2082 | switch (c->event) { | |
f60f6b8f | 2083 | case XFRM_MSG_EXPIRE: |
26b15dad | 2084 | return xfrm_exp_state_notify(x, c); |
d51d081d JHS |
2085 | case XFRM_MSG_NEWAE: |
2086 | return xfrm_aevent_state_notify(x, c); | |
f60f6b8f HX |
2087 | case XFRM_MSG_DELSA: |
2088 | case XFRM_MSG_UPDSA: | |
2089 | case XFRM_MSG_NEWSA: | |
26b15dad | 2090 | return xfrm_notify_sa(x, c); |
f60f6b8f | 2091 | case XFRM_MSG_FLUSHSA: |
26b15dad JHS |
2092 | return xfrm_notify_sa_flush(c); |
2093 | default: | |
2094 | printk("xfrm_user: Unknown SA event %d\n", c->event); | |
2095 | break; | |
2096 | } | |
2097 | ||
2098 | return 0; | |
2099 | ||
2100 | } | |
2101 | ||
7deb2264 TG |
2102 | static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, |
2103 | struct xfrm_policy *xp) | |
2104 | { | |
2105 | return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) | |
2106 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2107 | + nla_total_size(xfrm_user_sec_ctx_size(x->security)) | |
2108 | + userpolicy_type_attrsize(); | |
2109 | } | |
2110 | ||
1da177e4 LT |
2111 | static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, |
2112 | struct xfrm_tmpl *xt, struct xfrm_policy *xp, | |
2113 | int dir) | |
2114 | { | |
2115 | struct xfrm_user_acquire *ua; | |
2116 | struct nlmsghdr *nlh; | |
1da177e4 LT |
2117 | __u32 seq = xfrm_get_acqseq(); |
2118 | ||
79b8b7f4 TG |
2119 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); |
2120 | if (nlh == NULL) | |
2121 | return -EMSGSIZE; | |
1da177e4 | 2122 | |
7b67c857 | 2123 | ua = nlmsg_data(nlh); |
1da177e4 LT |
2124 | memcpy(&ua->id, &x->id, sizeof(ua->id)); |
2125 | memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); | |
2126 | memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); | |
2127 | copy_to_user_policy(xp, &ua->policy, dir); | |
2128 | ua->aalgos = xt->aalgos; | |
2129 | ua->ealgos = xt->ealgos; | |
2130 | ua->calgos = xt->calgos; | |
2131 | ua->seq = x->km.seq = seq; | |
2132 | ||
2133 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2134 | goto nlmsg_failure; | |
0d681623 | 2135 | if (copy_to_user_state_sec_ctx(x, skb)) |
df71837d | 2136 | goto nlmsg_failure; |
1459bb36 | 2137 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2138 | goto nlmsg_failure; |
1da177e4 | 2139 | |
9825069d | 2140 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2141 | |
2142 | nlmsg_failure: | |
9825069d TG |
2143 | nlmsg_cancel(skb, nlh); |
2144 | return -EMSGSIZE; | |
1da177e4 LT |
2145 | } |
2146 | ||
2147 | static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, | |
2148 | struct xfrm_policy *xp, int dir) | |
2149 | { | |
2150 | struct sk_buff *skb; | |
1da177e4 | 2151 | |
7deb2264 | 2152 | skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); |
1da177e4 LT |
2153 | if (skb == NULL) |
2154 | return -ENOMEM; | |
2155 | ||
2156 | if (build_acquire(skb, x, xt, xp, dir) < 0) | |
2157 | BUG(); | |
2158 | ||
082a1ad5 | 2159 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); |
1da177e4 LT |
2160 | } |
2161 | ||
2162 | /* User gives us xfrm_user_policy_info followed by an array of 0 | |
2163 | * or more templates. | |
2164 | */ | |
cb969f07 | 2165 | static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, |
1da177e4 LT |
2166 | u8 *data, int len, int *dir) |
2167 | { | |
2168 | struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; | |
2169 | struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); | |
2170 | struct xfrm_policy *xp; | |
2171 | int nr; | |
2172 | ||
cb969f07 | 2173 | switch (sk->sk_family) { |
1da177e4 LT |
2174 | case AF_INET: |
2175 | if (opt != IP_XFRM_POLICY) { | |
2176 | *dir = -EOPNOTSUPP; | |
2177 | return NULL; | |
2178 | } | |
2179 | break; | |
2180 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) | |
2181 | case AF_INET6: | |
2182 | if (opt != IPV6_XFRM_POLICY) { | |
2183 | *dir = -EOPNOTSUPP; | |
2184 | return NULL; | |
2185 | } | |
2186 | break; | |
2187 | #endif | |
2188 | default: | |
2189 | *dir = -EINVAL; | |
2190 | return NULL; | |
2191 | } | |
2192 | ||
2193 | *dir = -EINVAL; | |
2194 | ||
2195 | if (len < sizeof(*p) || | |
2196 | verify_newpolicy_info(p)) | |
2197 | return NULL; | |
2198 | ||
2199 | nr = ((len - sizeof(*p)) / sizeof(*ut)); | |
b4ad86bf | 2200 | if (validate_tmpl(nr, ut, p->sel.family)) |
1da177e4 LT |
2201 | return NULL; |
2202 | ||
a4f1bac6 HX |
2203 | if (p->dir > XFRM_POLICY_OUT) |
2204 | return NULL; | |
2205 | ||
1da177e4 LT |
2206 | xp = xfrm_policy_alloc(GFP_KERNEL); |
2207 | if (xp == NULL) { | |
2208 | *dir = -ENOBUFS; | |
2209 | return NULL; | |
2210 | } | |
2211 | ||
2212 | copy_from_user_policy(xp, p); | |
f7b6983f | 2213 | xp->type = XFRM_POLICY_TYPE_MAIN; |
1da177e4 LT |
2214 | copy_templates(xp, ut, nr); |
2215 | ||
2216 | *dir = p->dir; | |
2217 | ||
2218 | return xp; | |
2219 | } | |
2220 | ||
7deb2264 TG |
2221 | static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) |
2222 | { | |
2223 | return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) | |
2224 | + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) | |
2225 | + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) | |
2226 | + userpolicy_type_attrsize(); | |
2227 | } | |
2228 | ||
1da177e4 | 2229 | static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, |
d51d081d | 2230 | int dir, struct km_event *c) |
1da177e4 LT |
2231 | { |
2232 | struct xfrm_user_polexpire *upe; | |
2233 | struct nlmsghdr *nlh; | |
d51d081d | 2234 | int hard = c->data.hard; |
1da177e4 | 2235 | |
79b8b7f4 TG |
2236 | nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); |
2237 | if (nlh == NULL) | |
2238 | return -EMSGSIZE; | |
1da177e4 | 2239 | |
7b67c857 | 2240 | upe = nlmsg_data(nlh); |
1da177e4 LT |
2241 | copy_to_user_policy(xp, &upe->pol, dir); |
2242 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2243 | goto nlmsg_failure; | |
df71837d TJ |
2244 | if (copy_to_user_sec_ctx(xp, skb)) |
2245 | goto nlmsg_failure; | |
1459bb36 | 2246 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2247 | goto nlmsg_failure; |
1da177e4 LT |
2248 | upe->hard = !!hard; |
2249 | ||
9825069d | 2250 | return nlmsg_end(skb, nlh); |
1da177e4 LT |
2251 | |
2252 | nlmsg_failure: | |
9825069d TG |
2253 | nlmsg_cancel(skb, nlh); |
2254 | return -EMSGSIZE; | |
1da177e4 LT |
2255 | } |
2256 | ||
26b15dad | 2257 | static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4 LT |
2258 | { |
2259 | struct sk_buff *skb; | |
1da177e4 | 2260 | |
7deb2264 | 2261 | skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); |
1da177e4 LT |
2262 | if (skb == NULL) |
2263 | return -ENOMEM; | |
2264 | ||
d51d081d | 2265 | if (build_polexpire(skb, xp, dir, c) < 0) |
1da177e4 LT |
2266 | BUG(); |
2267 | ||
082a1ad5 | 2268 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); |
1da177e4 LT |
2269 | } |
2270 | ||
26b15dad JHS |
2271 | static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) |
2272 | { | |
2273 | struct xfrm_userpolicy_info *p; | |
0603eac0 | 2274 | struct xfrm_userpolicy_id *id; |
26b15dad JHS |
2275 | struct nlmsghdr *nlh; |
2276 | struct sk_buff *skb; | |
7deb2264 | 2277 | int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); |
0603eac0 HX |
2278 | int headlen; |
2279 | ||
2280 | headlen = sizeof(*p); | |
2281 | if (c->event == XFRM_MSG_DELPOLICY) { | |
7deb2264 | 2282 | len += nla_total_size(headlen); |
0603eac0 HX |
2283 | headlen = sizeof(*id); |
2284 | } | |
cfbfd45a | 2285 | len += userpolicy_type_attrsize(); |
7deb2264 | 2286 | len += NLMSG_ALIGN(headlen); |
26b15dad | 2287 | |
7deb2264 | 2288 | skb = nlmsg_new(len, GFP_ATOMIC); |
26b15dad JHS |
2289 | if (skb == NULL) |
2290 | return -ENOMEM; | |
26b15dad | 2291 | |
79b8b7f4 TG |
2292 | nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); |
2293 | if (nlh == NULL) | |
2294 | goto nlmsg_failure; | |
26b15dad | 2295 | |
7b67c857 | 2296 | p = nlmsg_data(nlh); |
0603eac0 | 2297 | if (c->event == XFRM_MSG_DELPOLICY) { |
c0144bea TG |
2298 | struct nlattr *attr; |
2299 | ||
7b67c857 | 2300 | id = nlmsg_data(nlh); |
0603eac0 HX |
2301 | memset(id, 0, sizeof(*id)); |
2302 | id->dir = dir; | |
2303 | if (c->data.byid) | |
2304 | id->index = xp->index; | |
2305 | else | |
2306 | memcpy(&id->sel, &xp->selector, sizeof(id->sel)); | |
2307 | ||
c0144bea TG |
2308 | attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); |
2309 | if (attr == NULL) | |
2310 | goto nlmsg_failure; | |
2311 | ||
2312 | p = nla_data(attr); | |
0603eac0 | 2313 | } |
26b15dad | 2314 | |
26b15dad JHS |
2315 | copy_to_user_policy(xp, p, dir); |
2316 | if (copy_to_user_tmpl(xp, skb) < 0) | |
2317 | goto nlmsg_failure; | |
1459bb36 | 2318 | if (copy_to_user_policy_type(xp->type, skb) < 0) |
f7b6983f | 2319 | goto nlmsg_failure; |
26b15dad | 2320 | |
9825069d | 2321 | nlmsg_end(skb, nlh); |
26b15dad | 2322 | |
082a1ad5 | 2323 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2324 | |
2325 | nlmsg_failure: | |
2326 | kfree_skb(skb); | |
2327 | return -1; | |
2328 | } | |
2329 | ||
2330 | static int xfrm_notify_policy_flush(struct km_event *c) | |
2331 | { | |
2332 | struct nlmsghdr *nlh; | |
2333 | struct sk_buff *skb; | |
26b15dad | 2334 | |
7deb2264 | 2335 | skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); |
26b15dad JHS |
2336 | if (skb == NULL) |
2337 | return -ENOMEM; | |
26b15dad | 2338 | |
79b8b7f4 TG |
2339 | nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); |
2340 | if (nlh == NULL) | |
2341 | goto nlmsg_failure; | |
0c51f53c JHS |
2342 | if (copy_to_user_policy_type(c->data.type, skb) < 0) |
2343 | goto nlmsg_failure; | |
26b15dad | 2344 | |
9825069d | 2345 | nlmsg_end(skb, nlh); |
26b15dad | 2346 | |
082a1ad5 | 2347 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); |
26b15dad JHS |
2348 | |
2349 | nlmsg_failure: | |
2350 | kfree_skb(skb); | |
2351 | return -1; | |
2352 | } | |
2353 | ||
2354 | static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) | |
2355 | { | |
2356 | ||
2357 | switch (c->event) { | |
f60f6b8f HX |
2358 | case XFRM_MSG_NEWPOLICY: |
2359 | case XFRM_MSG_UPDPOLICY: | |
2360 | case XFRM_MSG_DELPOLICY: | |
26b15dad | 2361 | return xfrm_notify_policy(xp, dir, c); |
f60f6b8f | 2362 | case XFRM_MSG_FLUSHPOLICY: |
26b15dad | 2363 | return xfrm_notify_policy_flush(c); |
f60f6b8f | 2364 | case XFRM_MSG_POLEXPIRE: |
26b15dad JHS |
2365 | return xfrm_exp_policy_notify(xp, dir, c); |
2366 | default: | |
2367 | printk("xfrm_user: Unknown Policy event %d\n", c->event); | |
2368 | } | |
2369 | ||
2370 | return 0; | |
2371 | ||
2372 | } | |
2373 | ||
7deb2264 TG |
2374 | static inline size_t xfrm_report_msgsize(void) |
2375 | { | |
2376 | return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); | |
2377 | } | |
2378 | ||
97a64b45 MN |
2379 | static int build_report(struct sk_buff *skb, u8 proto, |
2380 | struct xfrm_selector *sel, xfrm_address_t *addr) | |
2381 | { | |
2382 | struct xfrm_user_report *ur; | |
2383 | struct nlmsghdr *nlh; | |
97a64b45 | 2384 | |
79b8b7f4 TG |
2385 | nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); |
2386 | if (nlh == NULL) | |
2387 | return -EMSGSIZE; | |
97a64b45 | 2388 | |
7b67c857 | 2389 | ur = nlmsg_data(nlh); |
97a64b45 MN |
2390 | ur->proto = proto; |
2391 | memcpy(&ur->sel, sel, sizeof(ur->sel)); | |
2392 | ||
2393 | if (addr) | |
c0144bea | 2394 | NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); |
97a64b45 | 2395 | |
9825069d | 2396 | return nlmsg_end(skb, nlh); |
97a64b45 | 2397 | |
c0144bea | 2398 | nla_put_failure: |
9825069d TG |
2399 | nlmsg_cancel(skb, nlh); |
2400 | return -EMSGSIZE; | |
97a64b45 MN |
2401 | } |
2402 | ||
2403 | static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, | |
2404 | xfrm_address_t *addr) | |
2405 | { | |
2406 | struct sk_buff *skb; | |
97a64b45 | 2407 | |
7deb2264 | 2408 | skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); |
97a64b45 MN |
2409 | if (skb == NULL) |
2410 | return -ENOMEM; | |
2411 | ||
2412 | if (build_report(skb, proto, sel, addr) < 0) | |
2413 | BUG(); | |
2414 | ||
082a1ad5 | 2415 | return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); |
97a64b45 MN |
2416 | } |
2417 | ||
1da177e4 LT |
2418 | static struct xfrm_mgr netlink_mgr = { |
2419 | .id = "netlink", | |
2420 | .notify = xfrm_send_state_notify, | |
2421 | .acquire = xfrm_send_acquire, | |
2422 | .compile_policy = xfrm_compile_policy, | |
2423 | .notify_policy = xfrm_send_policy_notify, | |
97a64b45 | 2424 | .report = xfrm_send_report, |
5c79de6e | 2425 | .migrate = xfrm_send_migrate, |
1da177e4 LT |
2426 | }; |
2427 | ||
2428 | static int __init xfrm_user_init(void) | |
2429 | { | |
be33690d PM |
2430 | struct sock *nlsk; |
2431 | ||
654b32c6 | 2432 | printk(KERN_INFO "Initializing XFRM netlink socket\n"); |
1da177e4 | 2433 | |
be33690d | 2434 | nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, |
af65bdfc | 2435 | xfrm_netlink_rcv, NULL, THIS_MODULE); |
be33690d | 2436 | if (nlsk == NULL) |
1da177e4 | 2437 | return -ENOMEM; |
be33690d | 2438 | rcu_assign_pointer(xfrm_nl, nlsk); |
1da177e4 LT |
2439 | |
2440 | xfrm_register_km(&netlink_mgr); | |
2441 | ||
2442 | return 0; | |
2443 | } | |
2444 | ||
2445 | static void __exit xfrm_user_exit(void) | |
2446 | { | |
be33690d PM |
2447 | struct sock *nlsk = xfrm_nl; |
2448 | ||
1da177e4 | 2449 | xfrm_unregister_km(&netlink_mgr); |
be33690d PM |
2450 | rcu_assign_pointer(xfrm_nl, NULL); |
2451 | synchronize_rcu(); | |
2452 | sock_release(nlsk->sk_socket); | |
1da177e4 LT |
2453 | } |
2454 | ||
2455 | module_init(xfrm_user_init); | |
2456 | module_exit(xfrm_user_exit); | |
2457 | MODULE_LICENSE("GPL"); | |
4fdb3bb7 | 2458 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM); |
f8cd5488 | 2459 |